| UDC 598.2(571.65) |
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Breeding Success of Middendorff’s Grasshopper Warbler (Locustella ochotensis) on Talan Island (Northern Part of the Sea of Okhotsk) in 2014 |
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| © 2015 Yu. A. Sleptsov |
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| Institute of Biological Problems of the North, FEB RAS, Magadan |
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| E-mail:
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| Breeding peculiarities of Middendorff’s Grasshopper Warbler (Locustella ochotensis) have been
studied on Talan Iisland (N 59º18'58'', E 149º04'20'') from June 10 till August 3, 2014. 12 nests, 8
of which had been found with micro radio transmitters, were observed. Eggs were laid from June 23
till July 8; occurrence of chicks in nests was noticed from July 7 till July 20th; start of chicks from
nests, from July 16 till July 30. The nesting success of Middendorff’s Grasshopper Warbler in 2014
made 53.5%. Destruction of layings and chicks was connected with unfavorable weather conditions
during the nesting period (storm rains, high water) and with predators. Under the marine climate
conditions, the prolonged nesting period, typical for the island population, has a positive effect on
the overall nesting success. |
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| Keywords: Middendorff’s Grasshopper Warbler, breeding success, Talan Island, radio tracking method. |
| Full text [In Russian] |
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