Spolne razlike u morfologiji i tempiranju selidbe vrste zviždak Phylloscopus collybita (Vieillot, 1817) i brezov zviždak Phylloscopus trochilus (Linnaeus, 1758) u sjevernoj Poljskoj

Šoštarić, Iva (2016) Spolne razlike u morfologiji i tempiranju selidbe vrste zviždak Phylloscopus collybita (Vieillot, 1817) i brezov zviždak Phylloscopus trochilus (Linnaeus, 1758) u sjevernoj Poljskoj. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

Chiffchaff (Phylloscopus collybita) and Willow Warbler (Phylloscopus trochilus) are two sympatric bird species breeding across most of Europe and a part of Asia. During autumn and spring migration to Africa and southern parts of Europe, north-European populations of these species migrate along the coasts of the Baltic Sea. Both species are monomorphic in plumage, which impedes any research of potential sex differences in their migration behaviour. I collected and analysed blood samples of individuals of both species captured during their migration through the Baltic coast in northern Poland, to determine their sex genetically, by DNA from blood and feather samples. Based on the measurements of DNA-sexed individuals, I developed criteria for morphological sexing of each species. I applied these criteria to sex unsampled birds captured at the same ringing site during several migration seasons in the past, to identify sex differences in their migration timing and the effects of weather on migration. Differential migration in the form of protandry was revealed in both species. The timing of males' passage varied considerably from year to year in Chiffchaff, but less so in Willow Warbler, pointing to a more rigid migration schedule in the latter species. Additionally, temperature appears to influence migration timing and choice of stopover in Chiffchaffs.

Item Type: Thesis (Diploma thesis)
Keywords: DNA-sexing, morphological sexing, differential migration, protandry, stopover
Supervisor: Remisiewicz, Magdalena
Co-supervisor: Maguire, Ivana
Date: 2016
Number of Pages: 69
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 24 Mar 2016 12:24
Last Modified: 24 Mar 2016 12:24
URI: http://digre.pmf.unizg.hr/id/eprint/4617

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