FIRST YEAR DISPERSION OF WHITE-TAILED SEA EAGLES (Haliaeetus albicilla) FROM CENTRAL EUROPE, BASED ON GPS/GSM TELEMETRY David Horal, Ivan Literák, Rainer Raab, Péter Spakovszky, Karel Makoň, Hynek Matušík, Jakub Mráz, Veronika Machálková, Dana Rymešová & Miklós Váczi Eagles of Palearctic: Study and conservation II International Scientific and Practical Conservation 7-10 September 2018, Park-Hotel Lake Aya, Katun, Altai Kray, Russia
Number of WTE pairs in CZ in 1970 - 2014
Breeding distribution of WTE in CZ in 2014 small circle: probable breeding, large circle: confirmed breeding)
Population increase leads to occupancy of suboptimum habitats
Population increase leads to occupancy of suboptimum habitats
Current breeding population size • • •
Austria (2017) 30 br. pairs Czechia (2016) 116 br. pairs Hungary (2016) 297-307 br. pairs
Probst & Pichler 2017 Bělka 2017 Szelényi 2017
(1970s: A – 0, CZ – 0, HU – 20 breeding pairs)
GPS-GSM tagging, 2016-2017 – I. • • • • •
Ecotone (Poland) loggers KITE-H LF 30 g, solar charger backpack, harnesses from 6mm Teflon ribbon usually 1 position / 3-6 hours birds tracked from fledging until 31st March of 2nd calendar year
GPS-GSM tagging, 2016-2017 – II. • 23 tagged birds: Austria – 1 nest / 3 juveniles Czechia – 8 nests / 14 juveniles Hungary – 4 nests / 6 juveniles • Calculated values: 95% MCP (minimum convex polygon) 80% KDE (Kernel density estimate) 50% KDE (Kernel density estimate)
GPS-GSM tagging, 2016-2017 – III. • Total 42.584 fixes obtained (1382 – 2432 per bird) • 95% MCP 2174 – 102980 km2 (median = 12775) • 80% KDE 446 – 47802 km2 (median = 3846) • 50% KDE 138 – 15825 (median = 1288) • Distance from nest to wintering area (31st Jan roost): 3 – 283 km (median = 62, n = 21)
Individual distances between nest and location from 31.1.2018 (km) AUKO02 AUKO05 AUKO06 AUKO07 AUKO09 AUKO15 AUKO17 AUKO10 AUKO13 AUKO16 AUKO20 AUKI09 AUKI10
F F F F F F F F? F? F? F? ? ?
41 234 156 70 14* 36 104 38 55 10 283 32 92
AUKO01 AUKO03 AUKO04 AUKO08 AUKO14 AUKO18 AUKO19 AUKI 81 AUKO11 AUKO12
MEDIAN
* last location of a dead bird instead of 31.1.2018
M M M M M M M M? M? M?
25 158 115 3 107 31 32 260 57 19*
62
Individual „home ranges“ on the basis of all locations (km2) ID Sex AUKI09 ?
95% MCP
80% KDE
102980 47802
ID Sex AUKO01 M
95% MCP
80% KDE
13376
2196
AUKI10
?
2797
1137
AUKO03
M
4503
911
AUKO02
F
12775
1537
AUKO04
M
14337
5142
AUKO05
F
38580 20667
AUKO08
M
2980
963
AUKO06
F
18842
6695
AUKO14
M
AUKO07
F
55003 25500
AUKO18
M
2213
812
AUKO09
F
12279
3788
AUKO19
M
5733
3846
AUKO15
F
43856
6572
AUKI 81 M?
43767 26604
AUKO17
F
6247
2327
AUKO11 M?
10709
5430
AUKO10 F?
2174
752
AUKO12 M?
4474
1184
AUKO13 F?
14029
5848
AUKO16 F?
MEDIAN
12775
2201
446
AUKO20 F?
59177 23322
24067 25500
3846
GPS-GSM tagging, 2016-2017 – IV. • Tagged birds divided into 3 groups according to their origin: 1. SW part of Czechia (n = 8) MCP 100% 124.321 km2 2. SE part of Czechia, E part of Austria, W part of Hungary (n = 10) MCP 100% 307.716 km2 3. E part of Hungary (n = 5) MCP 100% 53.196 km2
Lanžhot, Břeclav LX493 AUKO01 M LX494 AUKO02 F 5. 5. 2017
Třeboň LX475 AUKO08 M LX193 AUKO09 F 16. 5. 2017
Acknowledgements: numerous field co-workers (CZ: Petr Dvořan, Pavel Forejtek, Vítězslav Chadt, Jan Kotrba, Dominika Lokingová, Karel Makoň, Hana Makoňová, Bohumil Mášek, Filip Odstrčil, Pavel Olbert, Miloš Paisker jr., Miloš Paisker sr., Petr Podzemný, Václav Strolený, Vlasta Škorpíková, Pavla Tájková, Stanislav Vyhnal, Radek Zeman)
Tomáš Bělka for the photographs some information can be found at: www.birdtelemetry.cz
Thank you for your attention!