April - May 2012 | Issue 22
w w w. a f r i c a n d i v e r. c o m
Featuring - Drift nets, Macro Photography
P o r t S t J o h n s & R a ff a e l l a S c hlegel
Yo u r F r e e O n l i n e D i v i n g M a g a z i n e
w w w . a f r i c a n d i v e r. c o m
Contents REGULARS
3
Ed’s Logbook
74
F E AT U R E S 4
Creature feature - Nudibranchs
30 Port St Johns
Ivan van Heerden
Health and Safety 44 62
DAN - Treatment of shark bites DAN - Bites and attacks
54 Know your sea birds - Cape Gannets Cover Photograph by Ivan van Heer d e n
Editors:
Published by:
Cormac McCreesh & Paul Hunter
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12
66 Raffaella Schlegel
Illegal drift nets
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Underwater Photography 20
Pa g e 2 | www.africandiver.com
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Conservation
Macro photography
Contents
E d’s Logbook
Port St Johns
We have had tremendously positive feedback from readers about our Aliwal Shoal feature. I even had the pleasure of diving with a group of french divers who were inspired to explore Aliwal Shoal after downloading, reading and even printing issue 21. It’s always a pleasure meeting people who read our magazine and gratifying to read comments and emails from readers who mail us. We really do welcome feedback regardless of whether it’s constructive criticism or positive praise. Our first article in this issue is a brilliantly light-hearted article on nudibranchs, by Christophe Mason-Parker, on how divers become addicted to searching for them. I don’t know of any diver who doesn’t enjoy nudibranchs and the images in this article illustrate perfectly why divers become addicted to finding the little guys. In keeping with the theme of the little guys, we’ve also included an article by Paul Hunter on his journey learning about macro photography. We’ve been following the growth of a European organization called The Black Fish. They are devoted to marine protection and their voice is getting louder but they also back up their conservation commitment with action. Their forthcoming campaign is against illegal driftnets in the Mediterranean and we were quite shocked to learn of the extent of the problem. Sadly, it’s a political problem that requires bold steps and strong leadership to solve. Our second article is by Wietse van der Werf of the Black Fish and focuses on the damage illegal drift nets do to the marine environment. The months of June and July see divers, photographers and film crews congregating in the swashbuckling town of Port St Johns for the annual sardine run. So I visited the town to see if there was more to the town than sardine fever. I was delighted to delve into the culture and characters there and an article on the town was a natural conclusion to my trip. And seeing as gannets are the indicator species for sardine activity (along with common dolphin) we thought a little feature on this fascinating bird appropriate.
Co n t e n t s
Raffaella Schlegel is well-known, locally and internationally, in shark diving circles and we’re proud to feature this dynamic lady in our Women and Diving section. Raffa’s passion for sharks and living the dream is infectious and inspirational and her message of changing your life to follow your dreams is one we could all give deep consideration to. And finally, we feature the fantastic photography of Ivan van Heerden. Hailing from South Africa and currently resident in Pennington, Ivan has been privileged to travel the world and learn underwater photography from the best. The images he’s chosen to share with us are brilliant and bold. We hope you’ll enjoy them as much as we do. May your bubbles always be free Cormac
Pa g e 3 | w w w. af r i c a n d i ve r. c o m
Creature Feature - Nudibranchs
Article and images by Christophe Mason-Parker
Dealing with an addiction Risbecia tryoni Pa g e 4 | www.africandiver.com
Contents
Nembrotha lineolata feeding on a sponge
Creature Feature - Nudibranchs
Have you ever found yourself in conversation with non-diver friends, perhaps recounting stories of your recent trip away; the excellent weather, the fantastic local food and of course the diving? You impress them with tales of friendly turtles and curious sharks but then inexplicably, as you become carried away with the excitement of remembering your underwater excursions, you blurt out the word nudibranch. Suddenly the group goes quiet, the polite ooh’s and ahh’s stop abruptly and you become patently aware that you are on the verge of exposing your guilty secret. “A what?” one of the group predictably enquires. “Um, its a type of sea slug “ you mutter in a hushed voice, not wishing to attract the attention of others around you. “A sea slug!” another of your companions invariably repeats at such a level that all those at the back of the room are now gazing in your direction. No matter which way you look at it, trying to convince non-divers that sea slugs are exciting is no simple task. Moreover when you explain that you are willing to travel huge distances at a significant financial cost to search for these animals, you are typically greeted with a look that suggests you should perhaps seek medical advice.
Co n t e n t s
Pa g e 5 | w w w. af r i c a n d i ve r. c o m
Creature Feature - Nudibranchs
To the outside world ‘nudi-hunters’ are viewed with suspicion. Like stamp collectors or train spotters, they are considered obsessive by nature, usually middle-aged men with an unhealthy interest in the Star Wars films. The reality could not be further from the truth (though some of us do live up to the stereotype). Take a look at the Sea Slug Forum or Nudipixel.net (always a worry typing this one into your URL) and you will see that Nudibranch fans come from all walks of life. So what’s the big attraction? Well, let’s start at the beginning. The word ‘Nudibranch’ comes from the greek meaning ‘naked gill’ and refers to the breathing apparatus or branchial plume located on the back of the animal. In fact when divers talk about nudibranchs they are often actually referring to the subclass Opisthobranchia, which includes nudibranchs, seahares, sidegill slugs and their relatives.
Pa g e 6 | www.africandiver.com
Nudibranchs have soft extended bodies, usually with a pair of rhinophores on the head. These sensory organs are used for chemo-detection, helping the animal to detect predators, prey, or possible mates. Many species have external gills, either in the form of a branchial plume on their back or elongated gills on the side of the body beneath their mantle. Opisthobranchs vary in size from a couple of milimetres up to 50cm in length. Some species display vivid colourations with contrasting psychedelic patterns that serve to warn off predators. Other species blend so well into their background that they become almost impossible to see. A variety of habitats provide shelter to nudibranch species, from mangrove and seagrass beds to rocky and coral reefs. Next time you are at the beach check out the tide pools exposed at low tide as they can produce an abundance of specimens. Many species bury themselves in the sand or hide under rocks, only coming out into the open with a rising tide.
They are distributed throughout the world’s oceans but diversity is richest in tropical regions. In South Africa the area around Sodwana Bay has a particularly high abundance of nudibranch species. Feeding habits vary widely amongst nudibranchs from herbivourous grazers to cannibalistic carnivores. Many species feed on particular sponges, and this is always a good place to start looking for them. Other favoured prey items include, tunicates, sea anemones, corals and sea pens. Sea slugs are hermaphroditic, meaning that they possess both male and female sexual organs. Despite their genderless disposition, nudibranchs do require a partner to reproduce. The sexual organs of a nudibranch are always located on the right hand side of the animal behind the head, and so reproduction takes place when the individuals position themselves head to tail.
Contents
Creature Feature - Nudibranchs
A pair of Gymnodoris ceylonica prepare to mate Co n t e n t s
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Creature Feature - Nudibranchs
Like the animals, nudibranch eggs come in a variety of shapes and sizes, with many species producing attractive looking egg ribbons. The presence of these brightly coloured spirals attached to the substrate is usually a good indication that there are nudibranchs in the area. Nudibranchs move by crawling along the substrate on a muscular foot, with some species of Chromdoris able to flap their mantle as they crawl. A few species such as the aptly named Spanish Dancer (Hexabranchus sanguineus) are able to swim by flapping their mantle allowing them to take to the water column in an attempt to escape predators. The bright colours of Phyllidia varicosa act as a warning to predators
With over 3000 Opisthobranch species discovered so far across a variety of habitats it is obvious that they are a diverse and fascinating group of animals. But what separates them from other invertebrates, say the crabs or the urchins, and has propelled them to such dizzy heights with devotees across the globe? In many cases the animals’ striking colour, causes them to stand out from the background and will draw a diver in for a closer look. However, there is far more to their appeal than this. Enthusiasts don’t just look for nudibranchs on dives, but will dive specifically to look for nudibranchs. The infatuation does hint at the geek inside all of us, to people’s obsessive nature and their desire to hoard. In the case of nudibranchs it is not the animal that is being collected but quite often a photograph. Pa g e 8 | www.africandiver.com
This photographic image serves as proof to having seen a certain species, a trophy to be labeled, catalogued and stored with others in a digital library. The fact that nudibranchs are small, slow moving, and often brightly coloured, makes them the perfect subject for those with even the most basic of camera setups. What’s more, there are an almost endless number to encounter alongside the real possibility of discovering an unidentified species. Despite being slow moving, their small size means nudibranchs are frequently difficult to find, and this rarity goes some way to further explaining the attraction. Like kids on a treasure hunt, the adventure is often the pursuit and the hunger only satisfied upon the discovery of a specimen.
Contents
Creature Feature - Nudibranchs
What started off as a mild interest quickly grows into a full-blown infatuation and before you know it you are hooked. It is this thrill of finding something new that awakens the inner child in us and has nudi-hunters around the globe combing the seabed for another species to add to their collection. So the next time you are at a dinner party, don’t be embarrassed to let slip your secret. So what if you can tell your Hypselodoris from your Dendrodoris, or your rhinophores from your branchial plume. Remember you are not alone out there, so stand up and tell the world, you’re a nudi-geek and you’re proud of it!
Tips for finding nudibranchs
• Be patient and take your time • Check under rocks and rubble remember to always put rocks back where you find them • Make use of a rising tide - many nudibranchs will come out into the open • Look out for their food source - nudibranchs can often be found on sponges or soft corals • Revisit at different times - a site will often have different species present during the day and night • Take a buddy – two pairs of eyes are better then one The Spanish Dancer Hexabranchus sanguineus is able to swim by flapping its mantle Co n t e n t s
Pa g e 9 | w w w. af r i c a n d i ve r. c o m
Creature Feature - Nudibranchs
The psychedelic colours of Hypselodoris kanga Pa g e 1 0 | www.africandiver.com
Contents
Photo by Christophe Mason-Parker Co n t e n t s
Pa g e 1 1 | w w w. a fr i c a n d i ve r. c o m
Conservation - Drift Nets
Time To Act On The Curtains Of Death Article by Wietse van der Werf Divers work to free a sperm whale entangled in driftnet. Alberto Romeo Pa g e 1 2 | www.africandiver.com
Contents
Conservation - Drift Nets
How cruelty, destruction and fraud obstructs the fight against illegal driftnets Without sounding like denouncing the importance of ending the continued slaughter of dolphins and whales by hunters from Norway, Iceland, Faroe Islands and Japan, it is quite unsettling to realise that the total number of victims by these hunts account for less than 5% of the total number of cetaceans killed by driftnets in the Mediterranean Sea every year. Tens of thousands of animals die in these so-called ‘Curtains of Death’ annually, with whales, dolphins, turtles and sharks being the most commonly caught victims. Furthermore, the species targeted by this indiscriminate fishing method are more often than not over-exploited. Thus populations of bluefin tuna and swordfish, for example, are under severe threat from overfishing throughout the Mediterranean region. In perhaps the biggest victory for the marine conservation movement over industrial fishing to date, the United Nations banned the use of driftnets on the high seas in 1992. However, much like the global moratorium on commercial whaling, many Drowned turtles caught in abandoned nets. Projeto Tamar Brazil/Marine Photobank Co n t e n t s
flouted the new rules. Pa g e 1 3 | w w w. a fr i c a n d i ve r. c o m
Conservation - Drift Nets
The difference is that, unlike the whaling
Even after 2002 fishermen from France,
Dispatching observers in various ports
debate, all nations agree that driftnets
Italy, Turkey and Morocco continued to
to document illegal vessels and keeping
are illegal. It is not something open to
use the nets. The French claimed their
an eye on the political situation, Oceana
interpretation.
driftnets weren’t driftnets but called them
has been very effective at bringing the
‘thonaille’ instead, claiming they were in
driftnet issue into the public eye and
Regardless of the fact that the driftnet
the right as they were distinctly different,
onto the agenda of responsible officials.
ban is a fairly straight-forward agreement,
being traditional French nets. The law-
Another aspect the organisation has been
it seems that a number of governments are
makers at the EU were forced to enact
very successful at is exposing fraud with
unable to implement it competently. The
even more legislation and it took another
regard to fishing subsidies.
ban outlaws a specific type of fishing gear
five years until the law left no doubt as to
that is easily identifiable and therefore
what exactly constitutes a driftnet.
In
addition
to
the
French,
Italian
fishermen have continued to fish with the
easily monitored and stopped. Well that’s the idea at least. As soon as the UN ban
During these five years the French driftnet
prohibited driftnets on a large scale. To
was implemented a discussion started
fleet continued to operate illegally and
tackle this, the EU gave Italian fishermen
among European policy makers. It was
was, strangely enough, awarded generous
an estimated €200 million in fisheries
felt that new separate regulations were
fishing quotas by the French government
subsidies in the last 5 years to convert to
needed to effectively police the driftnet
just before the new legislation came into
other fishing techniques and destroy the
ban in European waters.
force. In addition the French are known
driftnets. The money disappeared: some
to have operated illegally within the
fishermen laundered the funds through
It took ten years to implement this and
Palagos Sanctuary during this period. The
questionable schemes and others used it
in 2002 the European Union ratified a
sanctuary is the largest marine protected
to buy even bigger nets.
similar ban as the UN had done in 1992. It
area in the Mediterranean Sea, covering
goes without saying that in those 10 years
over 87,000 km2 and situated North of
In addition to this, a large number of
European fishermen were able to continue
Sardinia, surrounding Corsica completely.
nets were moved to Morocco, where Italians set up companies and started an
to use driftnets unopposed, even though plenty of legal options were available to European law enforcers to act.
Pa g e 1 4 | www.africandiver.com
This and much more of the information
export trade of mostly swordfish (which
on illegal driftnets has been collected by
is commonly caught using driftnets) back
the organisation Oceana.
to Italy. Contents
Conservation - Drift Nets
Trawler out at sea flickr.com/adstream Co n t e n t s
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Conservation - Drift Nets
Within a single year the export of swordfish from Morocco to Italy rose by over 80%. You don’t have to be a fisheries expert to realise what is going on. Oceana
estimates
that
500
vessels
continue to use the illegal driftnet fishing gear across the Mediterranean Sea. Most of the French have now abandoned their driftnets, yet Italian, Turkish and Moroccan fishermen continue with the activity. It is unthinkable that illegal activity of any kind that continues to wreck lives and cause damage to biodiversity on such an international scale, is allowed to carry on relatively unchallenged. Even the fact that the fraud with fishing subsidies has been allowed to take place relatively unpunished should set some alarm bells ringing in Brussels. However, it stays relatively quiet on that front. It is as if, aside from agreeing to ban driftnets in the first place, European governments are mostly united in their unwillingness to deal with these issues in a swift and effective way.
Pa g e 1 6 | www.africandiver.com
Bluefin tuna is heavily threatened by overfishing Marco Car√Ž/Marine Photobank
If this type of situation was drug
The law is soft on fishermen and
related or impacted on the financial
negative impacts on marine life
world, it would have been dealt with
a re i n n o w a y a p r i o r i t y o n t h e
robustly a long time ago.
political agenda. Contents
Conservation - Drift Nets
International crew of The Black Fish
While EU law-makers and local enforcement agencies are doing little to act on the continued driftnet criminality, a growing number of people are effectively organising to combat the issue. Set up by a group of young conservationists, The Black Fish is one of the fastest growing international marine conservation initiatives and currently expanding into a number of ambitious campaigns. The Black Fish is not just another organisation, instead it is a network of ordinary people acting to realise adequate attention and effective protection for threatened sea life. What our oceans need more than anything is a broad public movement to fight for its survival. Movement The Mayor of Brighton shows her support at The Black Fish stall
building
requires
grassroots
organising,
cooperation
between organisations and the involvement of people from all parts of society - beyond the standard options of signing up for membership or being advised on ‘ethical’ consumer choices. There are thousands of people interested in the issues of ocean conservation, yet what truly lacks is an accessible network for ordinary people to get involved in. This is where The Black Fish aims to step in. At the moment The Black Fish is working towards the purchase of its first ship. The vessel will enable the investigation of illegal fishing practices in European waters, facilitate the running of an education and training program and help satisfy the urgent need for more direct action campaigns at sea.
Co n t e n t s
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Conservation - Drift Nets
Zeno 1325, The Black Fish’s first action boat
Zeno 1325 being placed in the water for test runs
The Zeno 1325 was formerly in service with the Dutch Lifeguards
Preparations for the Mediterranean Driftnet Campaign
Pa g e 1 8 | www.africandiver.com
Contents
The Black Fish will launch its new campaign to end the use of illegal driftnets in the Mediterranean Sea this spring. Be sure to join us. Find out more about our work and ways to become involved, or support us at
www.theblackfish.org
Sea turtle trapped in abandoned fishing net Eric Leong/Marine Photobank Co n t e n t s
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Macro Photography
Macro
Photography Where I started from Article & Photos by Paul Hunter
Aperture F22, shutter speed 1/250th, two YS-90 strobes, Nikon F100(Wakatobi) Pa g e 2 0 | www.africandiver.com
Contents
Macro Photography
With numerous boxes on the table before me, I felt like a kid on Christmas morning; excited and anticipating great wonders. I had just taken delivery of my new underwater housing and had a smile on my face from ear to ear. After completing the tedious assembly of the housing, I came to the harsh realization that I was now not only broke but also had absolutely no inkling of where to start. We have a saying for this: ‘All the gear, no idea’. From as far back as I remember I have always been intrigued with what lies beneath our ocean’s surface, but it wasn’t until 2000 when I did my open water course and got to experience it all first hand, that I truly started marveling at the incredible world down there. I remember enthusiastically sharing my experiences with my friends and family with great excitement and awe. As memory serves me, it was only in 2002 while diving in Mozambique that I saw a fellow diver take a camera underwater. I still remember the camera setup; it was a Sony P5 with a Sony housing and the reason I remember this so clearly is because when I got back home, I rushed off to buy myself the identical setup. Aperture F16, shutter speed 1/125th, two YS_90 strobes, Nikon D200(Sodwana) Co n t e n t s
Pa g e 2 1 | w w w. a fr i c a n d i ve r. c o m
Macro Photography
I was completely clueless with regard to
Overnight
I
became
obsessed
with
photography. But slowly, over the next
improving my photography. I bought
two years I used this compact camera
and read books, trawled the internet and
as a means of building my confidence
listened to every word the photographers
and sharing my underwater images with
around me had to say. I actually read
family and friends. I had absolutely no
the user ’s manual to my camera to
idea about skills such as lighting, f-stops,
understand what my camera could do. I
composition and photography in general.
had never used the macro function and
It was all point and shoot and I was
did not even know that the little flower
completely satisfied with the results I
icon
meant “macro”.
obtained. Initially,
I
was
encouraged
to
try
Little did I know that a visit to a local
shooting macro as it is reasonably easy
mall in 2004 would change the way
to master and I could get immediate
I
improvements in my results if I followed
saw
underwater
photography,
and
a few basic rules.
photography in general. photographic
The other aspect was to work within the
society had an exhibition on display in
benefits and limitations of my camera.
the mall and I was just blown away by the
The benefits were that my equipment was
images. I could not understand why my
small and light, which meant I could get
images did not even remotely resemble
in close to subjects and into small spaces.
The
local
underwater
the images they had on exhibit. It was recommended that I purchase I immediately contacted the chairman of
an external strobe - which I duly did. I
this group and arranged to join as I was
was also encouraged to use the manual
determined to take photos like the ones I’d
settings on my camera instead of auto
seen.
mode.
Pa g e 2 2 | www.africandiver.com
I was also told to understand aperture and shutter speeds to help improve my photography in the long run. It was frustrating at times but keeping at it led to it eventually coming naturally to me. With the few pointers I had picked up and been taught, my imagery began to improve. I was no longer afraid to try different settings or techniques, which is what I believe to be the main hurdle for people who are just starting photography as a hobby. If you want to improve your photography, whether you own a compact or a DSLR, don’t be afraid to experiment. Also, try moving the strobe around for various lighting effects and shoot your subject from every conceivable angle. Study the different results afterwards and decide which works for you and your equipment and which does not. Choose images you like and use the technique again, maybe adding something, changing something or trying to duplicate the same result or improve on it.
Contents
The next step in the process is to improve on what you have already achieved. The best way to do this is to get feedback on your images. In order to do this you
e r o
Macro Photography
f e B
must be able to handle a little criticism, but don’t take it personally. Rather see it as a way of learning and to improve your photography. Someone else’s opinion or suggestion may come in very useful. You always have the choice to use the advice or ignore it. I found this the fastest way to improve my images. If you are nervous about doing this face to face or in person, consider joining forums like Wetpixel, which has thousands of experienced users willing to give advice and help. Before shot: Full auto-mode, Sony)
The next logical step for me was to upgrade to a full DSLR setup. This in itself has a whole new range of challenges and learning curves but the basics of photography stay the same.
r e t f
A
Initially, the first few dives were frustrating as the equipment was much heavier and bulkier and felt more awkward than what I had become accustomed to. It affected my buoyancy and I felt uncomfortable, but this speed bump disappeared after just a few dives. In all honesty diving with a camera actually forced me to improve my buoyancy and diving skills.
Aperture F16, shutter speed 1/125th, two YS_90 strobes, Nikon D200(Sodwana) Co n t e n t s
Pa g e 2 3 | w w w. a fr i c a n d i ve r. c o m
ore
Macro Photography
f e B
Before shot: Full auto-mode, Sony) Pa g e 2 4 | www.africandiver.com
Contents
r e t f
Macro Photography
A
Aperture F32, shutter speed 1/250th, two YS_90 strobes, Nikon D200 (Sipadan) Co n t e n t s
Pa g e 2 5 | w w w. a fr i c a n d i ve r. c o m
Macro Photography
As someone that has a lot of respect for the ocean and
the water. I would set my aperture to F22 and a shutter
everything that lives within it, I try my upmost not to cause
speed of 125/sec and I still follow this practice today.
any damage. We all, as divers, have at some stage been
Depending on the subject and angle I either increase or
the source of some sort of damage, albeit unintentionally.
decrease aperture and the same for the strobe power. The
This factor increases when you do underwater photography
more you practice and understand your equipment the
as you are closer to the reef, especially when doing macro
better your results become.
photography. Another aspect of macro photography I would like to
Please also remember that no shot is worth any damage to reef or injury to any marine life.
mention is reducing the pace of your dive to spend adequate time on your subject. You will not get the required results with one or two shots. If you are shown a subject by the
I also had the misconception that my images would improve
dive guide that you would like to photograph, firstly
exponentially overnight because of all my expensive new
allow the other divers to have a look and then when they
equipment. Disappointingly, this was not to be anywhere
move off you can move in and start your process. There
near to the reality of the situation. Pricey equipment does
is nothing worse than trying to photograph a subject with
not guarantee you a professional result.
numerous divers all around you. The ocean is for all and for all to see so have respect for other divers. This aspect
In some ways I had to start over using the knowledge I had
becomes a little more difficult when there are a number of
built up and progress from there. Speaking to a number of
photographers together on a dive. My thinking on this is
photographers it was recommended that I start with macro
that if a photographer finds a subject they are entitled to
again and once comfortable with the discipline to move
spend some time with it but at the same time also share
to wide angle. It’s not that macro is easier but there are a
with others. Its a difficult one but use your discretion.
couple of constants that helped me get some pleasing results right from the start.
During your diving experience you will come across very selfish divers and photographers but I promise you
To help me get started it was suggested that I preset my camera with a few standard settings on land before entering
Pa g e 2 6 | www.africandiver.com
that the majority are very friendly, passionate and more than willing to share experiences with you.
Contents
Macro Photography
Aperture F22, shutter speed 1/125th, two YS_90 strobes, Nikon D200 (Sodwana) Co n t e n t s
Aperture F32, shutter speed 1/125th, two YS_90 strobes, Nikon D200(Sodwana) Pa g e 2 7 | w w w. a fr i c a n d i ve r. c o m
Macro Photography
Aperture F14, shutter speed 1/125th, YS-90 strobes and YS-350, Nikon D200(Pomene)
I would like to leave you with this message: Improvement comes with practice and patience. And when you think you’ve perfected those two aspects ... you haven’t, it’s an on-going process. So, I can honestly say that after all the time that I’ve spent with cameras in my hands, I can always learn something new or different with a little imagination, some creativity, patience, passion, persistence and interest - these are the ingredients for moving forward with this fascinating hobby. If you are open to wanting to learn, you will. Aperture F22, shutter speed 1/125th, two YS-90 strobes, Nikon F100(Wakatobi) Pa g e 2 8 | www.africandiver.com
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Photo by: Paul Hunter Co n t e n t s
Pa g e 2 9 | w w w. a fr i c a n d i ve r. c o m
Hot Spot - Port St Johns
Port St Johns Article: Cormac McCreesh | Images: Rob Nettleton
Approximately 380 kilometers south of Durban and 300 kilometers north of East London, the Umzimvubu River runs its final gauntlet and slips between the two “gates� of Mount Thesiger to the south and Mount Sullivan to the north. On its southern banks lies the town of Port St Johns.
Pa g e 3 0 | www.africandiver.com
Contents
Hot Spot - Port St Johns
Captain Jack Sparrow and the crew of the Black Pearl would not be out of place here. The town abounds with swashbuckling raconteurs and backpacking gypsies. Eco-friendly hippies mix with youthful adventurers and the occasional societal dropout. Sangomas (indigenous healers) practice their art on the beaches in the dead of night and at dawn. It’s a heady mixture of culture, nationalities, eccentric personalities and modern day pirates, and once a year it’s the launch pad for local and international divers, film crews, photographers and dive operators all searching for that elusive adrenaline rush of being part of the annual “sardine run”. Established as a supply port in 1878, under treaty with the local Pondo tribe, the town was a welcome sight for sailors braving the seas of South Africa’s Wild Coast. The Wild Coast is home to the Xhosa people of South Africa and got its name from its reputation for being the graveyard for ships. Sudden storms, wild winds, heavy seas, rocky shores and freak waves have claimed the bones of many ships with the most well-known being the Grosvenor, the SS Waratah and the MV Oceanos.
Co n t e n t s
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Hot Spot - Port St Johns
The Grosvenor went down on the 4th of August 1782 along the Pondoland coast north of the Umzimvubu River and close to the place where the Sao Joao had gone down in 1552. She was on her return voyage to London and carried a crew of 132 and 18 passengers. Her cargo was valued at ÂŁ75000 in those days. The SS Waratah was a 150 metre long steamship that operated between Europe and Australia in the early 1900s. In July 1908, en route from Durban to Cape Town, she disappeared with 211 passengers and crew. To date no trace has been found of her.
For a while it was thought that Port St Johns derived its name from the wrecked
And on the 4th of August 1991 the
Portuguese ship Sao Joao until it was
French built, Greek owned cruise ship the
discovered that that ship had in fact run
MV Oceanos sank. She was en route from
aground north of the (then) village and
East London to Durban. All 571 people on board were saved and she now lies at a depth of between 92 and 97 meters south of Coffee Bay and Hole in the Wall, about 5 kilometers offshore.
Pa g e 3 2 | www.africandiver.com
near Port Edward. The origin of the name remains a mystery despite claims that on certain days the profile of Saint John the Baptist can be made out on some cliffs near the river.
Contents
Hot Spot - Port St Johns
Waterfall Bluff Co n t e n t s
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Hot Spot - Port St Johns
For a while the town enjoyed the visitations of ships on their grand journeys but the greater range of modern ships and the gradual silting of the Umzimvubu River led to the decline of the town and the closure of the harbour in the early 1940s. Today the Umzimvubu River (Umzimvubu means hippo in Xhosa) flows gently into the sea mixing it’s silty brown water into the nutrient rich waters of the currents that define this coastline, while the Mounts of Thesiger and Sullivan watch over it. These two mounts are named after the British officers who represented the British when the port was established. The closure of the harbour led to the isolation of the town and its appeal to eccentrics grew, as did the “live and let live” attitude of its inhabitants and its current appeal to travelers. Today, Port St Johns comprises approximately 3 000 inhabitants and is actually two hamlets spread over first and second beach with third beach being isolated and undisturbed. First beach is alongside the town’s busy centre with its taxi rank, supermarket, shops and street stalls. Second beach is more laid back and is a prime tanning and swimming beach that is growing in popularity. Sadly, this beach has been the scene of six horrific fatal shark attacks since 2007; a result perhaps of increased water activity by humans in a natural stop off point for sharks. Pa g e 3 4 | www.africandiver.com
The rugged rock formations at Waterfall Bluff Contents
Hot Spot - Port St Johns
The entire Wild Coast is known for
On average, there are 82 days of rain.
Because
of
its
wild
and
under-
sharks - it is an un-exploited resource
The fishing is good and the best time to
developed countryside and its forests,
for fish and an estuarine reproduction
visit is April to August.
Port St Johns is a popular location for
area for many fish and shark species.
films and documentaries that require
There is ongoing research on shark
remote settings; parts of the film Blood
species in and around the area and
Diamond were filmed here.
zambezi (bull) shark pups have recently been tagged in the Umzimvubu River.
The continental shelf is closer inshore
Dusky, copper, zambezi, blacktip and
along the Wild Coast than other parts
thresher sharks have also recently been
of the South African coastline, which
tagged along the nearby coastline and
probably
great whites have been seen too.
shipwrecks, but is also the reason the
accounts
for
the
many
annual sardine run is best experienced from Port St Johns. It is prime hiking country and is
During the months of June and July,
growing in popularity with mountain
and sometimes August as well, many
bikers, canoeists and birders. Horse
dive operators base themselves in Port
Port St Johns is surrounded by rural
trails are being developed and two
St Johns. Visitors from all over the
and wild countryside and Pondoland
local operators offer dolphin and whale
world come to experience this unique
scarp forests. This gives it its unique
watching trips. Handicrafts, produced
phenomenon and the town bustles with
climate and is part of its charm and
by the locals, are in abundance.
life.
attraction. There is an airstrip on the top of
The many bars, lodges and backpacker
The average annual temperature is
Mount Thesiger and the roads in and
joints pulsate with activity and the
19째c, with the hottest months being
out of Port St Johns are reasonable
mouth of the river often becomes a
December to March and the coolest,
and very scenic. The town has a well-
congested
June to August. February is the wettest
stocked supermarket, a clinic, a doctor
waiting for a break in the waves to
month and July the driest.
to handle emergencies and a pharmacy.
launch into the sea.
Co n t e n t s
staging
point
for
boats
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Hot Spot - Port St Johns
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Contents
Hot Spot - Port St Johns
Local band performing for guests at Jungle Monkey Backpackers
And on the days when the weather Gods are unkind and launching to sea is impossible, visitors head off to experience the unique sights in the area or just laze about while Port St Johns relaxes their souls
Sangoma performing traditional rituals Co n t e n t s
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Tern hunting sprats
Far left: Copper shark and terns hunting sprats Left: Dorsal fin of a great white shark cuts the surface with the coastline in the background
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Hot Spot - Port St Johns
Things to do and places to visit: The Gap and Blow Hole.
The Blow Hole is best viewed when seas are rough. Seawater is forced through a natural chimney and shot some 20 meters into the air.
Airfield and dams.
Sundowners on Mount Thesiger’s airfield is a must do activity. From here you have spectacular views of the Umzimvubu river and Mount Sullivan.
Poenskop beach.
This is one of the area’s most isolated and natural beaches and boasts great fishing opportunities.
The Wild Coast museum in Port St Johns main road contains much on the history and culture of the Pondo people of the area.
Isinuka (place of the smell) springs. Natural sulphur spring of great importance in Pondo culture.
Dolphins and Whale watching sea-faris. Eagles nest. This is a cliff overlooking the town and is a wonderful place to enjoy a sundowner.
Cape Hermes lighthouse. Named after the HMS Hermes that surveyed the Pondoland coast and built n 1903 it’s light is visible from 13 nautical miles. Chance encounter with a humpback whale on a photo safari
Co n t e n t s
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Hot Spot - Port St Johns
Colourful sponges and soft corals, by John Costello
African Diver was hosted by Rob Nettleton of Offshore Africa Port St Johns. Rob and Debbie Smith (of Diving with Sharks) are experienced shark and sardine run operators that live in Port St Johns. In addition to their shark and sardine activities Rob and Debbie offer offshore educational and photographic tours offering great opportunities to view dolphins, whales and a large stretch of coastline hardly seen due to its ruggedness. They also are keen divers and have mapped many unique diving spots including an unmarked wreck.
Common dolphin encountered on a photo safari
Co n t e n t s
Additional thanks go to John Costello for sharing his knowledge of the town, its history, culture and for the use of his underwater images. Pa g e 4 1 | w w w. a fr i c a n d i ve r. c o m
Snorkelers encountering common dolphin with Waterfall Bluff in the background
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Contents
Photo by: Ivan van Heerden Co n t e n t s
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Health & Safety - DAN Treatment of a shark bite
Treatment of a shark bite Written by Sean French
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Contents
Health & Safety - DAN Treatment of a shark bite
The film ‘JAWS’, with its effect
A factor that determines the frequency
compounded by two more sequels,
of water activity is the water sports
affected the human psyche more than
enthusiast’s ability to actively suppress
any other media event in the 20th
the fearful thought of crossing paths with
century.
a dangerous shark.
The average person with media awareness therefore gets into the sea with the thought of a shark’s presence either in the fore - or background of their minds.
In fact, the thought is so effectively suppressed that it doesn’t dampen their enthusiasm or enjoyment. But, as we all know bad things do happen and some
To make matters worse, you can’t
shark species do bite people - worldwide.
always see them as well as what
Unfortunately, despite these numbers
they can ‘see’ us or, are aware of
being low, the psychological impact is
our presence in their world. In the
dramatic.
wilderness, at least you will have more
awareness
of
dangerous
predators.
The purpose of this article is not to fascinate (or to bore) you, as an informed diver,
Co n t e n t s
with
the
amazing
senses
of
A further benefit on land is that
successful evolution of sharks. Rather,
you might have a tree to jump into
the focus will be more on the odds,
and if you’re injured, at least you
forensics, survivability, treatment and
won’t drown – the ultimate killer
preventability of a shark attack and then
of many shark attack victims that
we’ll also look at the shark species that
might otherwise have survived
pose the biggest risk to humans and more
the shark bite.
specifically, divers.
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Health & Safety - DAN Treatment of a shark bite
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Contents
Health & Safety - DAN Treatment of a shark bite
The Forensics of a Bite For the analytical types the forensic
After the physical and psychological
properties of the shark bite are quite
recovery of a bite on his left calf by a Bull
amusing. To best appreciate the strength
shark in the Bahamas in 2002, Dr Erich
of a shark’s bite, we’ll use the human bite
Ritter embarked on an intensive forensic
as a reference.
study on the damaging effect of the bites of different ‘high-risk’ sharks.
A Grey Reef Shark exerts about 70kg of bite force; twice the amount of pressure
As Chief Scientist of the Global Shark
exerted by a human bite. Before we
Attack File he compiled a team of plastics
quantify the power of a shark bite, it
&
must be said that the severity of a shark
surgeons, medical technicians and cinema
bite is not only determined by the jaw
special effects technicians to analyze and
strength but by the destructive force of
recreate almost every aspect of a shark bite
the teeth as well. Essentially, the bottom
– angle and speed of approach, bite force
teeth serve as forks and the top row does
required to sever muscle and/or bone.
polymer
technologists,
orthopedic
Working as chef on a medium size cruise
the cutting. to
vessel in the Pacific near Easter Island, she
Of all sharks, the tiger shark has the
understandable figures, the flesh ripping
felt like a quick swim in the sea during a
meanest set of teeth with the most
strength of a Bull (Zambezi) shark is 150kg.
break. Swimming near a small tender she
destructive tissue shearing force as it not
After finding out what force was required
was attacked by a large Great White. Soon
only cuts but saws; all in one single biting
to rip his calf muscle right off, Dr Ritter
after grabbing hold of her she felt a ‘pop’
action. To make matters worse, some of
was curious about the bite force required
as her femur was snapped, shown by Dr
the larger sharks have a fast speed of
to bite through bone.
Ritter and his team to require a bite force of
To
quantify
the
bite
power
400kg. Heather is the only known person
approach of up to 25mph and once the victim is taken, can continue at about 15mph - compounding the shearing force
The fortunate survivor of this unfortunate experience was Heather Boswell in 1994.
to date to survive a bite as severe as this (see Table 1)
of the bite. Co n t e n t s
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Body Areas Bitten For the analyst, the following percentages represent the body areas bitten in attacks recorded since the mid-50’s to 1990:
Severity of a bite As we’ve seen above, different sharks have varying degrees of destructive capability with their jaws/teeth.
Your
survivability depends on the damage done to various vital anatomical structures. The following is a simple guide:
TABLE 1 GRADE Grade 1
Grade 2
Grade 3 Note that all these percentages collectively exceed 100 due to multiple injuries occurring in the same attack e.g. trauma to the hands when fighting off the shark or due to arms/hands
ANATOMICAL STRUCTURES AFFECTED • Both femoral arteries • One femoral and one posterior tibial artery • One femoral artery in upper 1/3 of thigh • One femoral artery in lower 2/3 of thigh • One brachial artery • Two posterior tibial arteries • Abdominal wounds with (major) internal organ involvement • One posterior tibial artery • Superficial limb wounds with no arteries cut • Superficial trunk injuries
POSSIBLE OUTCOME FATAL Should survive if proper beach treatment is available Always live if properly treated
being near the leg during the bite by a large shark. Pa g e 4 8 | www.africandiver.com
Contents
For immediate first aid care priorities, the ABCD will guide you best: A – Despite the compelling focus (or distraction) of the bite, ensure the patient’s AIRWAY is open to facilitate easy breathing B – Ensure that the patient is BREATHING and if not, provide assisted ventilations. If available, supplemental oxygen is invaluable to sustain metabolic oxygen requirements, especially if some blood is lost
MANAGEMENT OF A SHARK BITE VICTIM
C – Monitor blood CIRCULATION; not only the presence of a pulse in
For any emergency care practitioner a severe shark attack is a nightmare to deal with. In such a scenario shock is the Grim Reaper; more specifically hypovolemic shock compounded by multi-organ failure. As can be seen above, if large blood vessels are damaged, the body’s compensatory mechanism is severely challenged.
patient. The radial pulse (wrist) is a crude but handy guide to
an unconscious victim but also the strength and rate in a conscious indicate what you’re dealing with. If the patient is conscious but has no palpable radial pulse, shock is pretty well established and you need to escalate your sense of urgency and arrange intravenous access promptly. If no radial pulse is present you need to monitor the carotid pulse as your default assessment site. Please note that if there is injury to the arm or leg it is wise to
The initial scene and patient approach priorities can be illustrated by the 4 S’s : • SAFETY – Safety of the rescuer(s) and then the patient • SEND – Summon Advanced Life Support Assistance
• STABILISE – Without unnecessary delay, stabilize the patient before
or top of foot; whichever is relevant. D – DISABILITIES caused by complete or partial amputations do sometimes occur which escalates your shock management focus to the highest level. To stop bleeding in these cases with direct
rushing off to hospital on the back of a bakkie. Your
pressure and elevation alone won’t be sufficient. Although not
primary focus is stopping bleeding and managing shock
taught in first aid, in these severe cases a tourniquet should be
• SCOOT – Getting the patient to a suitable medical facility for a surgeon
Co n t e n t s
check the ‘distal’ pulse – opposite the wound on either the wrist
used from the start where the concern for the ‘loss of life’ is
to plug the holes as soon as possible together with the
greater than the concern for the ‘loss of the limb’. Remember
intravenous administration of whole blood products will
this; exsanguination (bleeding to death) ‘hurts more’ than an
bring about the best prognosis
elective amputation after a bite victim has been stabilized.
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Shock
TABLE 3
For effective management, it is best to look at shock in a simplified yet functional way: pump failure, vessel failure or fluid loss. These will manifest in three main stages as Compensating, De-compensating and
PRIORITY P1
CODE RED
P2
YELLOW
P3
GREEN
Irreversible. The following guide is simple and useful:
TABLE 2 SIGNS & SYMPTOMS
COMPENSATING
DE - COMPENSATING
IRREVERSEABLE
Pale skin / mucous membranes
Excessively
Normal to slightly pale
Moderately
None
Pulse
Increased
Sweating
Breathing Speech
Pale
Very pale
Increased
Very fast
Slow & shallow
Normal
Normal confused
Confused minimal
Level of consciousness
Capillary refill nailbeds Blood pressure
Normal
Very fast
Normal confused
Slow & weak
Confused - coma
1-2 secs
More than 2 secs
Pale – no refill
Normal
Slightly lower than Normal
Very low
The Most Dangerous Sharks Table 4 is a statistical illustration provided by the International Shark
STATUS
Almost dead, dying or will die if no specialized interventions are started asap Not critical but could become critical with time if no proper care is given soon Walking wounded (to prevent complacency with this category, please note that secondary infection from a shark bite could deteriorate to increase morbidity)
Note that the order of listing below has no relationship with the riskindex but is in fact closely related to the Grades of injury (Table 1). It just illustrates statistically of the more than 400 species of sharks, the 10 species that do attack humans most often and of those which are the most common culprits, not necessarily the most dangerous in any particular order:
TABLE 4 FREQ
PICTURE
1
TYPE OF SHARK
RISK INDEX
Lemon Shark
P2/3
Blue Shark
P2/3
Hammerhead
P2/3
Ragged-Tooth
P2/3
Grey Reef
P2/3
(Negaprion brevirostris)
2
(Prionac e glauca)
3
(Sphyrna mokarran)
4
(Eugomphodus Taurus)
5
(Carcharhinus amblyrhynchos)
Attack File from the Florida Museum of Natural History of which species
6
Shortfin Mako
P2/3
of shark most often attack humans; starting from the least at no 1 to the
7
Oceanic Whitetip
P2/3
Tiger Shark
P1/2
Great White
P1/2
Bull / Zambezi Shark
P2/3
most attacks by a specimen on humans at no 10. To indicate the risk of a specific shark’s bite, a risk-index is used and is illustrated below in Table
8
3 as Priority 1, 2 or 3. With sharks this risk-index is based on the size of
9
the bite, size of the shark, teeth configuration, jaw anatomy, jaw strength
10
and general tenacity.
(Isurus oxyrinchus)
(Charcharhinus longimanus)
(Galeocerdo cuvier) (Charcharodon carcharias) (Charcharhinus leucas)
COMMENTS
most attacks on scuba divers
Images from Wikipedia, the free encyclopedia
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Contents
What are the odds?
Public Safety Measures
Further interesting statistics from the data-base of the International
Measures that can be implemented by municipal authorities in
Shark Attack File from the Florida Museum of Natural History reveals
high volume swimmer and shark areas are already in place at most
that in over 3500 attacks recorded since 1580, only a fraction of all shark
popular beaches and holiday resorts. There is, however; room for
attacks were on scuba divers. Of all those attacks, 85% were close to
improvement in Southern Africa with the capability of the first
shore of which about two-thirds were in less than 5 feet of water. For
responders – more specifically the lifeguards and local EMS. The
the average person that enjoys the sea often, the risk of a shark attack is
models of preparedness as illustrated by the Hawaii Shark Task
calculated to be less than being struck by lightning, winning the lotto
Force as well as the St Lucie County Fire Department in Florida USA
or a coconut falling on your head. More people are killed annually by
are definitely the benchmark. In Florida there are over 30 miles of
faulty toasters than by sharks. Looking at these interesting odds from
coastline with many good surfing spots to patrol and is currently the
another angle, even though more people die from bee stings or malaria,
shark attack capital of the world. To optimize the Golden Hour for
I don’t know of anyone orchestrating a ‘hate-campaign’ against bees or
these trauma patients they have placed Beach Access Vehicles at the
mosquitoes – why’s that? Don’t they also take away ‘loved ones’, with
points of highest volume to serve as an effective link between the
relatives left behind feeling sad, bitter, helpless and disillusioned?
first responders and the local EMS. Because the early movement of
Despite these relatively comforting odds mentioned earlier, shark
a serious trauma patient prior to stabilization is a delicate process,
attacks, compounded by the bloody and traumatic nature of the event,
these four-wheelers with a trailer for the injured person works very
elicit deep primal fears. Again, some more food for thought; given the
well to get the bite victim to where he needs to get ASAP – a surgeon.
traumatic (and dramatic) nature of a motor vehicle accident, why don’t
The initiatives of these task forces have dramatically improved the
people ‘hate’ cars, lash out at speedsters or drunk drivers. I suppose
outcomes of shark attack victims over the last decade.
it’s easier to take revenge on sharks than on drunk drivers…..
Prevention
Sharks are in greater danger from us than we are from them. On a
I suppose the best form of prevention would be not to get into the
ratio of fatalities, about one million sharks are killed for every one of
sea at all but, that’s not practical advice. On the 30th July 1945 the
us. Remember this, not all fatal shark attacks were due to fatal wounds
warship USS Indianapolis went down in the Philipine Sea after being
inflicted. If a body washes up ashore with only Grade 3 injuries and no
bombed by the Japanese. The surviving sailors who were floating on
witness reports, it’s nearly impossible for a pathologist to determine if
the surface were not survivors for long. They were picked off one by
the cause of death was due to drowning or due to shock. Several shark
one by what was believed till recently to be Oceanic White Tips – that
bite victims could have survived the bite had they got to land or boat
is because these sharks are responsible for most open ocean attacks.
sooner but the injury inflicted by the bite was debilitating, therefore
After lengthy and in-depth research new evidence has come to light
not allowing self-rescue in water and therefore they DROWN.
that, if not all, several of these sailors perished at the hand (teeth) of Tiger sharks.
Co n t e n t s
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Conventional wisdom backfired at that time for those sailors because it
Gleaned from the accounts of survivors, if you are taken, keep
was interesting to note that in their survival training, they were told to
calm, go for the eyes and gills, do what you can to minimize
thrash about in the water and scream at the sight of sharks. Most modern
tissue shearing and above all, not to drown. For the rest you’re
and experienced shark behaviour experts would strongly discourage such
on your own survival instincts and most importantly – NEVER
behaviour. It is better to stay calm and upright in the water if possible.
GIVE UP!
Those sailors were not ‘eaten alive’ but victims of ‘exploratory bites’ and eventually drowned, either before or after going into irreversible shock.
Closing thoughts
Noted for the most destructive teeth of all shark species, the Tiger
Shark numbers are dramatically being challenged worldwide
Shark’s ‘flesh-ripping curiosity’ led to the demise of several sailors then
by the shark fin industry, indiscriminate fatalities in fishing
and on a smaller scale since then to other hapless victims.
nets as a non-intentional by-catch and then there are those that are deliberately killed out of misplaced fear for what they
Realistically, apart from never diving alone, here are a few pointers to
could do to mankind in their domain.
follow and these guidelines will be more specifically aimed at scuba divers and spear fishermen:
As the adage goes, “We can’t protect what we don’t understand”.
Scuba divers:
This is even more applicable with sharks but unfortunately
• Don’t turn your back on any risky specie of shark •
Move
away
from
any
feeding
frenzy
or
‘aromatic
zone’
i.e.
injured fish, chumming • When on the surface, keep an eye below you, not just where you’re going • In an impending attack, punch its nose or if a big shark, turn your back for the cylinder to take most of the blow (if your BC pops, ditch your weights) Spearo’s: • Apply what you can of the abovementioned • Watch your back all the time, especially with fish on your line • Remember you’re a fellow predator and in direct competition to a risky shark. Larger sharks have delicate hierarchy’s and you don’t even feature
there is the emotive aspect to skew the objectivity of public opinion. To compound matters further, many people probably aren’t interested in the plight of the sharks. We as scuba divers are probably the least likely victims, yet our influence as ambassadors of the oceans and its creatures is quite profound and more objective. We therefore need to exercise our influence as much as we can. I hope this article has given you a better insight to the ‘real’ risks to divers and therefore better perspective of your place in the shark’s world – not them in ours.
on the pecking order • If you have a fish and a risky shark approaches you, remember
Safe diving…
what they teach you in an anti-hijacking course – hand it over! No trophy fish is worth the risk of injury
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Photographed by Evert Nel
Co n t e n t s
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Know your sea birds - The Cape Gannet
Know your sea birds: The Cape Gannet
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Contents
Know your sea birds - The Cape Gannet
During the sardine run, divers, photographers, skippers and marine naturalists scan the horizon seeking out the tell tale plumage and flight of the Cape Gannet. For it is this bird that most often indicates the presence of feeding common dolphin or shoals of sardines.
Co n t e n t s
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QUICK FACTS
Name: Morus capensis, formally Sula capensis, and of the family Sulidae
Identification: They are easily identified by their large size, black and white plumage and distinctive yellow crown and hind neck. The pale blue bill is pointed with fine serrations near the tip. Juveniles and Immatures are dark brown with a pale bill. Adults are about 84–94 cm (33–37 in) long and have a 171–185 cm (68–73 in) wingspan and weigh roughly 2600g (5.7 lbs).
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Know your sea birds - The Cape Gannet
Diet Description: Cape Gannets feed on shoaling pelagic fish such as sardines and pilchards, consuming roughly 300g per day.
Habitat and distribution: The Cape Gannet has the second most restricted breeding range surpassed only by the Abbott’s booby which breeds exclusively on Christmas Island in the Indian Ocean. Cape Gannets have a slightly wider breeding range, comprising six offshore islands. Three of these (Mercury, Ichaboe
and Possession) are islands off the Namibian coast, two (Bird Island, Lambert’s Bay; Malgas Island, Saldanha Bay) off the west coast, and one (Bird Island, Port Elizabeth) off the east coast of South Africa. Within its normal range Cape Gannets are restricted to the continental shelf, at no more than 100 km from the coast. Occasionally they have been recorded on oceanic waters.
Contents
Know your sea birds - The Cape Gannet
Juvenile gannet at SANCOB rehabilitation centre Co n t e n t s
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Know your sea birds - The Cape Gannet
QUICK FACTS Reproduction: Cape Gannets are colonial breeders. The season begins in August when the pairs form and nests are rebuilt. Nest mounds are built on guano and are unlined. A single blue egg is laid and quickly becomes coated in brown guano. Most eggs are laid in October. The eggs are incubated for approximately 40 days. Both adults incubate the eggs using the webs of their feet. Both parents care for the chick for 97 days before it goes to sea. Cape Gannets fledge with just enough fat reserves for them to be able to survive without food for up to ten days. It is during this short time that they have to learn the necessary skills of capturing sufficient food to ensure their survival. In fact, it is during this Pa g e 5 8 | www.africandiver.com
period that the mortality rate of the Cape Gannet is at its highest. The many carcasses of brown gannets washed ashore on the beaches near breeding colonies attest to this.
into a spin with a deliberate tail movement. The spin increases toward the point of impact as the bird lays back its wings like a figure skater bringing her arms close to her body.
How they are able to dive at high speeds: Depending on the altitude of the attack and on the wing effort during the first phase of the nosedive, gannets hit the water with speeds of 40120 kilometers per hour. How does the gannet avoid veering off course and tumbling over during the dive and the dangerous moment of penetration? At 100 km/h, a slight gust, one wrong move, or rough seas could seal its fate.
In a fast dive, this movement usually turns the body once or twice around its axis, acting like a gyroscopic stabilizer in a rocket. In the language of physics, the bird is kept on course by the conservation of angular momentum.
The secret was revealed by slow-motion photography: while diving, the gannet puts itself
This elegant mechanical stabilization notwithstanding, the moment of impact on the water surface is critical because of the powerful forces involved. But the gannet has been well primed by nature for this moment. Its body can stretch into an ideally streamlined spindle. Contents
Know your sea birds - The Cape Gannet
Any unevenness about the head is eliminated. At the moment of immersion, the gannet draws in its neck slightly so that the pointed beak and the flat top of the head form a straight continuous line with the body, creating a cone which combines low resistance with high stability. The maze of air cells between the skin and the muscles, directly or indirectly connected with the lungs, receive and distribute whatever pressures occur.” (Tributsch 1984: 88-89) The Beak: “Many species of birds live largely or entirely on fish, and they tend to have long, strong, dagger-like beaks with which to spear their prey. The gannet is a coastal bird that flies over the sea searching for fish, then plummets into the water to spear them. Its beak is a similar shape to that of the kingfisher, which hunts in the same way over fresh water; but perhaps because of the depth and speed of the gannet’s dive, its beak has no external nostrils into which the water might be forced.” (Foy and Oxford Scientific Films 1982:150, 155)
Co n t e n t s
Pa g e 5 9 | w w w. a fr i c a n d i ve r. c o m
Know your sea birds - The Cape Gannet
Pa g e 6 0 | www.africandiver.com
Contents
Co n t e n t s
Pa g e 6 1 | w w w. a fr i c a n d i ve r. c o m
Health & Safety - DAN Bites & Attacks
While healthy respect for marine life and the environment generally are protective, accidents occur and serious afflictions may result. Sharks are commonly thought of as
BITES & ATTACKS
the marine animal most likely to bite
A med i c a l g u i d e t o handlin g i n t e r a c t i o n s with ma r i n e c r e a t u r e s .
but there may be circumstances in
By Joseph Becker, M.D. and Paul Auerbach, M.D., M.S.
or attack, but in truth there are many marine animals that may injure divers. Creatures such as barracuda, seals, otters and eels — while not normally aggressive — all may react defensively and bite humans.
Shark Avoidance & Attack Prevention.
It’s relatively common for divers to seek out and swim with sharks, which it is preferable to avoid contact altogether. As with so many other scuba situations, prevention is the best
No matter how careful they are,
solution to most problems. However,
sooner or later most divers are stung,
there are exceptions, and it’s important
bitten, punctured or poisoned by a
to know how to handle the challenge if
marine animal.
there’s no option but to interact.
Pa g e 6 2 | www.africandiver.com
Avoidance
There are a few things you can consider before you ever enter the water. Certain geographic areas may be known
to
have
significant
shark
populations or a history of documented shark attacks. Sanitation waste outlets, breeding inlets, deep channels and areas with dark or turbid water or drop offs may be areas frequented by larger sharks. No matter the surroundings, swimmers and divers should remain in groups, because isolated humans may be at higher risk for shark attack. Be aware, too, that shark attacks may occur with higher frequency at dawn and dusk. Finally, it’s also wise to avoid wearing anything shiny in the water; you don’t want your favorite jewelry mistaken for a fishing lure. This is particularly important to avoid barracuda bites.
Contents
Health & Safety - DAN Treatment of a shark bite
Defense
It is always unwise to tease or corner a potentially aggressive marine animal. If you are in the water with sharks, show them the healthy respect they deserve; most of the time they are content to share the water column with no fuss whatsoever. However, if you do find yourself in a situation where there is concern for attack, continually face the shark and calmly leave the area with controlled movements. Don’t panic, and avoid splashing behaviors. Don’t bolt for the surface, either; remain submerged, and seek cover with posterior protection, such as a crevice in a coral reef. This allows you a position of defense without worrying about an attack from behind. Most sharks are
Barracuda by Stephen Frink
stealth predators, and being able to keep them in your line of sight is helpful.
When you’re in the water, be aware of the presence of natural sources of shark food, such as seals or sea lions. Pinnipeds
If an attack does come, sharks may be repelled by blunt blows
playing or swimming in the water does not necessarily mean
to the head, nose or eyes; these are sensitive areas with a high
an absence of sharks.
density of sensory nerve fibers. Use of weapons such as spear guns, knives or bang sticks is not recommended, especially by
Don’t stay in areas in which blood is flowing freely in the
those untrained in their use. Inappropriate use of a weapon
water. If you are injured, exit the water immediately; if you
can cause unnecessary injury to both you and the animal that
are fishing, killed fish should be removed from the water, or
threatens you.
at least isolated from divers in the water, as soon as possible. There are a variety of products on the market that claim
Don’t ever try to feed a shark; if done at all, it should be only by a trained expert.
shark repellent qualities; they may have varying degrees of effectiveness, but practical application and evaluation have thus far been limited and, in some cases, inconclusive.
Co n t e n t s
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Health & Safety - DAN Treatment of a shark bite
Shark attacks in particular can result in significant trauma and substantial blood loss. Initial focus should be on providing basic life support as necessary, followed by stabilizing the patient for transport to definitive emergency care. Begin by assisting the victim out of the water. Apply direct pressure to any bleeding sites as quickly as possible. A barrier such as a cloth or gauze pads may be helpful, and gloves should absolutely be worn whenever possible to protect against bloodborne disease.
Upclose with a shark by Stephen Frink
Care of the Bite/Attack Victim If the unavoidable (or totally unexpected) occurs,
traumatic
injuries
caused
by
marine life can present challenges both to immediate and longer-term medical management. Pa g e 6 4 | www.africandiver.com
Do not release pressure to check on the wound for at least 10 minutes, and if a bandage soaks through with blood, place another directly on top of it and continue to hold pressure. If the injured area is on an extremity, elevate the body part above the level of the heart. It is important not to apply bandages in a fashion that restricts circulation beyond the dressing. The tips of fingers and toes should be pink, not pale or purple.
Almost with
all
sustained
bleeding direct
will pressure
stop and
immobilization; however, some wounds, particularly those involving amputation or damage to large blood vessels, may bleed uncontrollably. In these cases, a tourniquet should be considered. It is highly recommended that you have training in applying tourniquets before attempting to do so, as tourniquets are potentially hazardous interventions that risk loss of limb. Nearly anything may be used as a tourniquet: a length of rope, cord or webbing, but it must be well-padded to reduce the risk of severe local tissue injury. Apply the tourniquet between the heart and the injury as close to the bleeding site as possible. Tighten it only until bleeding is controlled. Loosen tourniquets for a moment every 10 to 15 minutes to assess whether they are still necessary for bleeding control.
Contents
Health & Safety - DAN Treatment of a shark bite
If the bleeding is brisk, retighten the device. If bleeding has ceased to the degree it can be readily controlled by direct pressure, remove the tourniquet and apply direct pressure, though keep the tourniquet handy in case it needs to be reapplied. If internal organs or tissues are protruding through an injury, do not attempt to push them back inside the body unless it is absolutely necessary for transport. All wounds to the chest should be covered with a dressing. Wounds that appear to be bubbling or “sucking� should be covered with a dressing taped and sealed on three sides. The fourth, untaped side serves as a flutter valve that allows air to escape from the chest. Without this flutter valve, air pressure may develop in the space surrounding the lung, preventing lung expansion. A splint may be used to immobilize an injured extremity to reduce pain, limit blood loss and protect a fractured limb. Aside from ready-made splints, a variety of objects may be used to improvise. Be careful that splints and dressings are not applied too tightly and that circulation to the extremity is not compromised.
Co n t e n t s
Stephen Frink If the wound is minor, you may care for
These interactions are almost uniformly
it by gently cleansing it with antiseptic
uneventful;
solution,
prophylactic
personal behavior and the behavior of the
physician’s
animals, as well as respect for the animals,
instructions; however, any significant shark
will generally prevent the vast majority of
bite will likely require expert emergency
attacks.
a
antibiotics,
dressing per
and your
medical care.
careful
attention
to
both
However, an awareness of avoidance techniques and injury treatment principles
Many divers relish the opportunity to swim
and
interact
with
aggressive marine animals.
potentially
will serve divers well in the rare but potentially deadly instances when injuries do occur. Pa g e 6 5 | w w w. a fr i c a n d i ve r. c o m
Raffaella Schlegel
“Follow your dreams without fear”
Raffa with Bottlenose dolphines in Mexico - Photo by Dietmar Posch Pa g e 6 6 | www.africandiver.com
Contents
Introducing
Raffaella Schlegel, You’d be forgiven for thinking Raffaella (or Raffa as she’s more commonly referred to) as shy and retiring until, that is, you bring up her favourite subject; sharks. At the very mention of the word the quiet and reserved Raffa affects her Italian roots and becomes an animated and expressive whirlwind of words and gestures. Raffa loves sharks.
They’re her passion, motivation and devotion. Born in the Italian town of Castellanza, in the Lombardy region of northern Italy, Raffa was destined for a career in fashion design. Being close to Milan was one reason for the fashion design trajectory but being born into a family involved in fashion and design was another. Fashion notwithstanding, Raffa was drawn to water from an early age. Raffa in Port St Johns for the Sardine Run - Photo by Dietmar Posch Co n t e n t s
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Raffa and Potato Bass - Photo by Dietmar Posch Pa g e 6 8 | www.africandiver.com
Contents
Competitive swimming drew Raffa in and she made the Italian National Junior team when she was 8 years old, making the National team when she turned 12. Swimming nurtured Raffa’s love for water but it also introduced her to Umberto Pellizari; Umberto being on the swim team too before focussing on freediving. Raffa dominated the butterfly stroke reigning as Italian 100 and 200-metre champion from 1980 to 1989. Chosen to go to the L.A. Olympics, Raffa missed out because of illness. On completing her schooling, and at
Raffa in the swim team
the urging of her family, Raffa studied fashion design, and graduated from the prestigious MA Instituto Marangoni Milano. Thus began a successful career in fashion design that started with sportswear collections for Arena and Speedo and
Raffa in Rome Co n t e n t s
Bottom row on the left : Raffaella is the 3rd child in the row wearing a white T-shirt and hat Bottom row on the right: Umberto is the blonde boy standing behind the short little girl in the front row
a
Japanese
knitwear
collection
for
Alessandra Macchi.
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Various assignments and projects grew
Raffa and Dietmar hit it off. Finding a
The timing for starting Blue Rush
Raffa’s skills and saw her working for, and
kindred spirit in Dietmar, Raffa resigned
coincided with the birth of the shark
on, some of the most prestigious brands in
her fashion design life and commenced
diving industry in Umkomaas. Raffa was
Europe.
living her dream of travel and diving.
the first woman recognised by ASCBOA (Aliwal Shoal Charter Boat Owners
In between building her career in fashion design Raffa continued to indulge her
The pair travelled to Mexico to look at
opportunities,
but
finding
Association) as a shark guide.
none
they headed back to Europe. Fashion
Today, Raffa divides her time between
design then became a means of funding
guiding International and local guests in
dive travel. In 2004 Raffa and Dietmar
shark diving, and taking photographs of
travelled to South Africa where they
sharks. Her favourite sharks are tigers
dived Gansbaai and Umkomaas. Six
and ragged-tooth sharks; tigers because
months later the couple were resident
of their energy and grace and ragged-
in Umkomaas where they opened their
tooth sharks for their laid backed style.
dive operation Blue Rush, working with
She has logged in excess of 2 500 hours
old pal, Umberto, to join the Italian team for
sharks, and where Raffa began taking
diving with sharks with her longest
the World Championships in 2001.
underwater photographs.
shark dive being a ten-hour dive for
passion for water, finding herself being drawn to diving as a consequence of going diving with her father. Holidays and weekends began to be filled with diving activities and travel. In 1989 Raffa experienced freediving for the first time, which culminated in an invitation from her
the production of Mike Rutzen’s Shark In 2001 Raffa decided to change her life and follow her passion. She’d always
Raffa found herself living her dream .
dreamed of travelling, even eschewing dolls
Night. Raffa speaks of sharks as her friends.
in favour of a pretend camera as a child.
Her diving experiences had nurtured
Her passion for shakes is infectious and
The catalyst was meeting partner, Dietmar
a passion for sharks and large marine
divers love to shark-dive with her. She
Posch on a trip to the Red Sea in 2001. At
animals and her childhood dreams of
often guides boatloads of women, whose
the time, Austrian, Dietmar was working on
travel had given rise to an interest in
husbands are diving, on snorkel shark
a production on free diver Herbert Nitsch.
photography.
experiences sharing her love of sharks.
Pa g e 7 0 | www.africandiver.com
Contents
Raffa taking photo’s of Blacktip sharks in Aliwal - Photo by Dietmar Posch Co n t e n t s
Pa g e 7 1 | w w w. a fr i c a n d i ve r. c o m
Like all shark dive operators Raffa’s mission is to change people’s perception of sharks. Having changed her life from one of fashion and design to shark diver and underwater photographer, Raffa continues to follow her dreams. She plans to expand her horizons and work with sharks all over the world: finding new shark Raffaella & Alberto Incanuti at Milan Women’s Fashion Week - Photo by Blue Rush
grounds and exploring shark behaviour at existing shark dive spots ... Guadalupe and the Bahamas are high on her list. Exhibiting and showcasing her underwater images of sharks is Raffa’s current project. Exhibitions are planned and fine art prints are available for purchase. Changing your life is a busy task and one Raffa seems to be enjoying immensely.
From left : Mike Rutzen - Raffaella Schlegel - Umberto Pelizzari - Photo by Pierluigi Baldetti Pa g e 7 2 | www.africandiver.com
Contents
Raffa doing what she loves, spending time taking photo’s of sharks - Photo by Dietmar Posch
Co n t e n t s
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Introducing
Ivan van Heerden
Pa g e 7 4 | www.africandiver.com
Featured Photographer
Contents
Cover Picture: Fijian Lion Fish: 1/20s F16 Nikon D200 10.5mm lens I cranked the fstop because I was at 27m and wanted to get the surface in the composition. Left Ivan van Heerden
My photography really started in early 2001 when I bought a Sony 3.2 megapixel point and shoot camera with an underwater housing. While I sometimes wanted to yell, in frustration, due to the shutter lag it taught me invaluable lessons in composition, patience and how to approach the subject. Eventually I reached the limitations of the camera and made the move to a housed DSLR, a Nikon D100 subsequently replaced by a D200.
Introducing
Ivan van Heerden
I was fortunate to be taught by Mauricio Handler, principle assistant to David Doubilet for many years as well as a Nat Geo photographer in his own right. Mauricio’s time and patience were invaluable and I learnt more each time we travelled together: from shooting Great Whites in the crystal clear but cold waters of Guadalupe to the tropical splendour of Fiji. Mauricio likes to push the limits with light, shutter speed and storytelling and I learned a great deal from him.
I have always been drawn to the sea. A year in Australia in 1988 opened the underwater world to me and I have never looked back. I graduated from the University of Natal with an Honours degree in Aquatic Entomology in 1993. Thereafter I restored a classic wooden yacht and sailed her over to the Caribbean in 1995. For the next 15 years I was fortunate enough to dive and photograph the Virgin Islands, the Bahamas as well as places like Fiji, Hawaii and Guadalupe Island in Mexico. My family and I returned to South Africa in 2009 and I rediscovered Aliwal Shoal.
Co n t e n t s
Featured Photographer
With Aliwal shoal in my backyard I am now focussing on bringing all that this amazing reef system has to offer to my picture taking. The shoal rightly deserves its place in the top dive sites of the world despite its reputation for current, bad viz and rough launches. Very few places on the planet have the mix of cold and warm water and the resulting unique ecosystem. Every time you dive the Shoal there is something new and exciting to see. Note I use rear curtain sync for all my strobe shots. I use 2 Ikelite ds125’s with manual controllers which in effect give me 16 levels of strobe control.
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In telling Aliwal’s story through the camera lens, my hope is to try to bring the importance of conserving this unique ecosystem to the fore. Despite being part of one of the first MPA’s in South Africa it is under daily threat from pollution from Sappi Saicor and the fact that KZN Sharks Board has indiscriminate gill nets and drum lines within the MPA is equally worrying. Educating the public is easiest done through a visual medium. The next chapter in my photography journey is to become bubble-less. Re-breathers, in my opinion, are going to open up a whole new range of sites and photographic opportunities in South Africa. I can’t wait to do my first 3 hour dive on Umzimayi Wall!
I run personalised photo courses for small groups. For further information please contact me via email on ivan@dynamicweighsystems.com Click Here Manta Head on: Shooting a black and white animal at night was particularly challenging on the exposure front. 1/100s f8 Nikon D100 10.5mm Strobe was set just to pop because of the large amounts of plankton which caused huge backscatter issues.
Swimming Pig: They may not fly but the swimming pigs of Little Majors island in the Bahamas are quite the attraction. 1/500s F13 Nikon D200 12-24mm lens Natural light. Co n t e n t s
Featured Photographer
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Purple Lobed Scorpion Fish: A dismal day on Outer Landers was made good when this guy was found 1/80s F14 iso 125 Nikon D200 60mm Macro. Co n t e n t s
Featured Photographer
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Co n t e n t s
Featured Photographer
Fast Shark: Stuart Coves Shark feed in the Bahamas is unlike anything in South Africa. I used the chance to kneel on the sand and play with extremely slow shutter speeds. 1/6s F14 iso 200 Nikon D200 10.5mm Max Strobe power. Pa g e 7 8 | w w w. a fr i c a n d i ve r. c o m
Frog Fish: 16 years of searching and one day at Landers you come around the corner and there he sits. I used the fastest flash sync shutter speed to try black out as much of the background as possible so to make him pop out of the picture 1/250 F14 iso 125 Nikon D200 60mm Macro. Co n t e n t s
Featured Photographer
Fijian Scorpion: I found this version of our paper fish perched on a soft coral. I lit him from below with a video light and then popped the strobes to fill in some detail 1/30s F32 iso 100 Nikon D200 with 105mm Macro. Pa g e 7 9 | w w w. a fr i c a n d i ve r. c o m
Guadalupe Great White: Crystal water clear 60m viz and large heavy metal loving Great Whites. The limitations of the D100 were brought painfully into the fore with the four frame buffer. Still I was pleased with the results. 1/320s F6.3 iso 200 Nikon D100 Natural light. Co n t e n t s
Featured Photographer
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BVI Shrimp: The British Virgin Islands is where I cut my teeth. I was lucky in that it was the perfect dive environment in which to hone all skills. 1/160s F20 iso 200 Nikon D100 105mm macro. Co n t e n t s
Featured Photographer
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Fijian Clown: This night dive I used a 2x tele-converter on the 105mm lens so that I could get some distance from my subject so that the fish wouldn’t completely disappear into the anemone. 1/125s F45 iso 100 Nikon D200 with 105mm Macro and 2x tele-converter. Co n t e n t s
Featured Photographer
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Beautiful Risbecia: These two animals were mating, by using a +2 dioptre on the 60mm lens I was able to make the image full frame. 1/100 F20 Nikon D200 60mm macro +2 wet dioptre. Co n t e n t s
Featured Photographer
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Triple Fin Blenny: Full Frame Ultra Macro, my favourite thing! These tiny fish live within the polyps of the brain corals and are only seen at night. 1/100s F45 Nikon D200 with 105 macro and 2x tele-converter. Pa g e 8 4 | www.africandiver.com
Featured Photographer
Bahamas Drug Plane: This DC4 crashed on takeoff from Normans Cay in the Bahamas during the 1980’s My wife investigates the residents closely. 1/200s F9 Nikon D200 10.5mm Natural light. Contents
Arrow Crab: Taken on a night dive on a wall in the Bahamas. He was like a deer in the headlights. 1/125s F29 Nikon D200 60mm macro. Co n t e n t s
Featured Photographer
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Lizards: I managed to sneak up to these two on the floor of Cathedral again the +2 dioptre helped fill the frame. 1/160s F13 Nikon D200 60mm +2 Dioptre. Co n t e n t s
Featured Photographer
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Gangster Bass: On a greenish(thanks Sappi) day I was photographing a pair of Potato Bass when suddenly I felt my head inhaled. After the heart attack I turned around to see this picture. The Potatoes don’t like anything, Tiger sharks included getting close to the bottom bait bucket! 1/100s F8 Nikon D200 10.5mm with strobes set to lowest power setting. Co n t e n t s
Featured Photographer
Pa g e 8 7 | w w w. a fr i c a n d i ve r. c o m
”...telling
Aliwal’s
story
through the camera lens, my hope is to try to bring the importance of conserving this unique ecosystem...” Chikuzen BVI: This 246 Foot derelict refrigeration ship sank 9 miles away from any land on a barren sand plain. It has become a magnet for many fish including large numbers of very feisty greater Barracudas. 1/80s F8 Nikon D100 10.5mm strobe set to lowest power. Pa g e 8 8 | www.africandiver.com
Featured Photographer
Contents
Brown Tang Eye: One of the first photo’s I ever took with my new D100 on a night dive which shows that sometimes luck does play a role! 1/125s F25 D100 105mm macro. Co n t e n t s
Featured Photographer
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Co n t e n t s
Featured Photographer
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