First year dispersion of White-Tailed Sea Eagles from Central Europe, based on GPS/GSM telemetry

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!