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New data on the interrelations between western (Phylloscopus trochiloides viridanus) and eastern (Ph. tr. plumbeitarsus) Greenish Warbler in the south of Siberiaтезисы доклада
- Авторы: Marova I.M., Kovylov N.S., Ivanitskii V.V., Alekseev V.N.
- Сборник: Abstract Volume of 25th International Ornithological Congress. Campos do Jordão, Brazil 22-28 August 2010
- Тезисы
- Год издания: 2010
- Место издания: Brazil
- Первая страница: 331
- Аннотация: The relations between the western (viridanus) and eastern (plumbeitarsus) Greenish Warblers in a zone of their sympatry in Altai-Sayan region and surrounding areas for a long time was included into the literature as an example of a ring species (Mayr, 1944). The assumption of such possibility has been put forward by K.Ticehurst in 1938 and based on that fact, that he did not manage to find out in accessible World collections any hybrids speciments between viridanus and plumbeitarsus. In 1990 - 2009 we have investigated some areas of the overlap zone of the two forms in the south of Siberia. Eastern form plumbeitarsus breeds in deciduous and mixed coniferous taiga forests, while viridanus leaves in mixed taiga forests up to subalpine zones. However in some habitats in Southern Transbaikalia, East Sayan and Middle Yenisei two forms breed in the same habitats, territories of some pairs border with each other. About 10 % of Greenish Warblers from our sample (n=65) had morphological characters intermediate between viridanus and plumbeitarsus. Some intermediate specimens we have recovered also in the museum collections. The songs of viridanus and plumbeitarsus show great variability but sonographic analysis reveals that singing of some individuals from the zone of sympatry has intermediate characters according to the form of elements (notes) and the frequency range. Playback experiments show clear response of many viridanus and plumbeitarsus to the «non-conspecific» song. Thus our data are not not suggest the widely accepted view on the nature of Greenish Warbler complex as a ring species (Irwin, 2001, 2005, 2008). It is not excluded, that in the zone of sympatry in Altai-Sayan region and north-western Mongolia a substantial hybridization of the two taxa takes place
- Добавил в систему: Марова-Кляйнбуб Ирина Михайловна