THE VILLAGE
NEWS
7 OCTOBER 2020 YOUR FREE COPY #ALLOVEROVERBERG The next issue of The Village NEWS will be out on 14 October 2020.
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Whale survey findings published
Local photographer Dave de Beer recently went along on one of Southern Right Charters' boat cruises and took this beautiful photo of a whale in Walker Bay. An abundance of marine life including seals, dolphins, sea birds and even penguins were also seen on the trip. Find 'Hermanus Whales' on Facebook to see more of Dave's photos. A print of this photo is available to The Village NEWS readers at a discounted price. Contact hermanuswhales@gmail.com for more information. PHOTO: Dave de Beer
W
e have been fortunate that on every whale watching trip we have seen whales. In addition there are sharks, penguins, seals and an abundance of seabirds thrown into the deal,” says Wilfred Chivel of the Dyer Island Conservation Trust and whale and shark watching companies, Dyer Island Cruises and Marine Dynamics. This follows the publication last week of the findings of the 41st annual aerial survey done by the Whale Unit of the University of Pretoria’s Mammal Research Institute. The survey found that it has been a slow season in as far as our visiting sea mammals are concerned. The 2020 survey, which monitors the South African population of southern right whales, was conducted under the watchful eye of Dr Els Vermeulen, Research Manager at the Whale Unit based in Hermanus, between 27 and 29 September.
All southern right whales observed along the stretch of coastline between Nature’s Valley and Muizenberg were counted, and photographs were taken of the unique callosity pattern on the heads of all individual females with calves, as well as all individuals of a brindle grey colouration or white blaze. A total of 12 hours and 52 minutes of flying time, spread over 3 days, was required to complete the survey, using an Airbus EC120B under charter from Silvercross Helicopters. In total, 136 females and calves (68 pairs) of southern right whales were counted and photographed, as well as 29 adult whales without a calf (so-called ‘unaccompanied adults’), bringing the total to 165 southern right whales between Nature’s Valley and Muizenberg. Most female-calf pairs were observed in De Hoop Nature Reserve and Walker Bay. “Although these numbers mark the second-low-
est number of right whales along our shores in October in the past 32 years, we must remember that the population of southern right whales is increasing annually by 6.5%,” says Vermeulen. “So while we are seeing fewer whales, their worldwide numbers are increasing. In 2018 a large number of whales were counted along our shores with many females mating. The gestation period is three years, so we can make an educated guess that there will be an increase in whale numbers in our area over the next couple of years.” It has been found that females return to where they were born to calve, hence the return visits every year. Despite the lower counted numbers there are still numerous sightings reported every day via social media. The Overberg Whale and Dolphin Group was started on WhatsApp to assist in alerting
residents and visitors to sightings. To join the group simply send a message with your name and number to 082 746 5579 . According to Vermeulen, this year’s number is also slightly lower than the 142 females with calves (71 pairs) counted at the end of August of this year between Hermanus and Witsand, re-indicating female southern right whales continue to limit their residency time in the South African breeding ground, with possible negative effects on the chances of calf survival. The number of ‘unaccompanied adults’ (males, resting females and receptive females) also remained low, as it has been since 2009, indicating that non-calving right whales are still not migrating to the South African coast as they used to do before 2009.
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