Crisis in steppe eagle populations in Tuva 
ISSN 1726-2860
(print version ISSN 1684-8438)


№20 winter-spring 2006

(Русский) В этом номере Степные паркиEcological networkСтепи под охранойEcosystem managementSteppe restorationСитуацияЗащита уязвимых видовSteppe pasturesЗаконодательствоОбъявления New books (Русский) От редакции

Защита уязвимых видов

Crisis in steppe eagle populations in Tuva

I.V. Karyakin (Center for field studies, Nizhnii Novgorod, Russia)

During of our surveys in Tuva Republic (1999-2005) were recorded 122 breeding sites of the steppe eagle. Density of the steppe eagle in the Republic is estimated as 12.43±7.25 breeding pairs/100 km2 (range 0.45-1.79 pairs/100 km2). A total of the 373-453 pairs (413 pairs at average) of the steppe eagle are estimated to breed in 1999-2001. In the period most of eagles (41.9 %) inhabited cold steppes on the southern side of the Tannu-Ola Mountains (mainly Western Tannu-Ola), 27.6 % – in the Tuva depression, and 24.5% – in steppes and alpine zone of the Mongun-Taiga mountain region. In 2002 we monitored 37 breeding areas and found a half of them to be occupied and 29.7 % – to be successful. In 2002-2003 the number of the steppe eagle took a third, decreasing to 32.2 %.

During the period of surveys we found 98 nests of the steppe eagle. Most of the eagles in Tuva nests on mountains slopes (67.3 %) covered with steppe; the nests are built up of rocks (74.5 %). In total were recorded 88 occupied nests; 53.4 % of which were successful (clutch or brood were observed), 4.5 % – were unsuccessful (clutch or brood deaths), and 42 % – were unoccupied. The average clutch (n=6) size was 1.83±0.41 (range 1-2) eggs. The average brood (n=33) size was 1.45±0.51 (range 1-2) chicks.

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Siberian Environmental Center
Biodiversity Conservation Center
UNDP/GEF Steppe Project in Russia
Association for the Conservation of Biodiversity of Kazakhstan
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