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Towards to the East-European and Siberian Chiffchaffs (Phylloscopus collybita abietinus - Ph.(c. ) tristis): geographical distribution, phenomenon of mixed singing and new evidences of hybridisation in Europeтезисы доклада
- Авторы: Marova I.M., Shipilina D.A., Ivanitskii V.V.
- Сборник: Abstr. of 8 th Conf. of the EOU, Latvia, Riga, Aug. 27-30, 2011
- Тезисы
- Год издания: 2011
- Место издания: Riga
- Аннотация: The zone of sympatry between Siberian (tristis) and East-European (abietinus) Chiffchaffs extends for over 1500 km from Southern Ural to Archangelsk region of Russia. Two Chiffchaff forms have some morphological differences and their songs are clearly different. In the sympatry zone many birds with the mixed song and “bilingual” are known. The hybridization between tristis and abietinus in the Southern Ural was proved recently (Marova et al. 2009). In this study we confirm the presence of hybridization in Archangelsk region - the most northwestern part of the zone of sympatry. Only 19 males had the same phenotype and haplotype, and by 29 males the mismatch between phenotype and haplotype was found. We compared the level of hybridization and distribution of males with different phenotypes, dialects and haplotyps in Arkhangelsk region and in the most south-eastern (Southern Ural) area of sympatry zone. In the Southern Ural we found clear border in distribution of Siberian Сhiffchaffs phenotype. This border coincides with a mountain ridge Zilmerdak and match with border of mixed deciduous and coniferous forests. Over 60% of birds with abietinus phenotype inhabit territory to the west of this ridge. We suppose that this ecological boundary prevent further distribution of tristis to the west in this region. On the contrary such border of phenotype distribution was not found in Arkhangelsk region. Chiffchaffs with different phenotypes were distributed equally throughout the area (Komarava,Shipilina, 2010). Distribution of vocal indexes corresponds to distribution of phenotypes in the whole studied area of hybridization.
- Добавил в систему: Марова-Кляйнбуб Ирина Михайловна