Migration behaviour of Blyth`s reed warbler (Acrocephalus dumetorum) in Central Asia

Samotskaya, V.V.; Kvartalnov, P.V.

Авторы: Samotskaya V.V., Kvartalnov P.V.
Сборник: Abstract Volume 8th Conference of the European Ornithologists Union (Riga, Latvia 27-30 August 2011)
Тезисы
Год издания: 2011
Место издания: Latvian Ornithological Society
Первая страница: 335
Последняя страница: 335
Аннотация: Blyth’s reed warbler is a common bird that had been an object for countless numbers of studies. However, it still remains one of the least studied warblers when we talk about migration behaviour. Blyth’s reed warbler migration pathways are located in Central Asia, and there are publications where a possibility of nesting of this species in this region is mentioned. However, the latest research calls this supposition in question for nest findings in Middle Asia could have been mistakenly related to Blyth’s reed warbler, but belong to other warbler species. In 2010, we studied Blyth’s reed warblers in the vicinities of Dushanbe, Tadjikistan. To confirm the specific accessory, we sequenced 300 bp of Cyt-b (mit DNA) from blood samples. Our research showed that Blyth’s reed warblers in Central Tadjikistan do short migration stops, on which they keep feeding territories and briskly communicate with each other. During our observations we have not noticed a female or found a nest. All the birds we saw were males. While feeding or communicating with each other, they were singing quite actively and their song was different from the one we had got used to hear in the northern part of the distribution where Blyth’s reed warbler breeds. This song was mentioned before (Marova et al. 2010) as a “southern song” and the main differences between it and the common advertising song are described. The authors found it difficult to interpret because of the unknown status of recorded birds. Our research shows that the birds which sing this “southern song” are non-breeding males keeping territory during stopovers on migration. In order to brighten up the functional meaning of this song, we did several playbacks demonstrating the “northern song” and the “southern song” to the birds and found out that they react only when hearing the “southern song” by moving close to the speaker. This song seems not to have a female-attraction function but is directed at male-male interactions.
Добавил в систему: Квартальнов Павел Валерьевич

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