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Knowledge about population structure and connectivity of waterfowl species, especially mallards (Anas platyrhynchos), is a priority because of recent outbreaks of avian influenza. Ringing studies that trace large-scale movement patterns have to date been unable to detect clearly delineated mallard populations. We employed 363 single nucleotide polymorphism(More)
The study of speciation and maintenance of species barriers is at the core of evolutionary biology. During speciation the genome of one population becomes separated from other populations of the same species, which may lead to genomic incompatibility with time. This separation is complete when no fertile offspring is produced from inter-population matings,(More)
Analysis of factors that influence stopover departure decisions in migrating birds is an important step in understanding their movements. We studied body condition, refuelling efficiency and weather during arrival and subsequent departure of migrant European Robins Erithacus rubecula at a stopover site on the Courish Spit (Eastern Baltic) to explain why(More)
Most songbird migrants travel between their breeding areas and wintering grounds by a series of nocturnal flights. The exact nocturnal departure time for these flights varies considerably between individuals even of the same species. Although the basic circannual and circadian rhythms of songbirds, their adaptation to migration, and the factors influencing(More)
Dataset on departure fuel loads, stopover length and fuel deposition rate of the European robins Erithacus rubecula during their migration in the Baltic area is presented. We test these empirical data against the predictions of an optimal migration model assuming that robins minimize time spent on migration, and that fuel deposition rate varies(More)
To estimate differences in hormonal mechanisms of regulation of spring and autumn migration in European robins Erithacus rubecula, the plasma corticosterone (CORT) concentrations were compared in birds caught during both migratory seasons. A total of 414 blood samples were analyzed. It was found that the baseline and stress-induced CORT concentrations in(More)
The question “Which factors govern the timing of migration in birds?” has fascinated researchers for a long time. It was initially assumed that avian migration is triggered by environmental factors, such as ambient temperature and food availability. Later laboratory experiments in various avian species convincingly showed that timing of spring migration is(More)
99 Interest of specialists to the problem of impact of climate on the biosphere is constantly growing throughout the world [1, 2]. Longgterm data on change in the timing of seasonal events in various organisms, longgterm dynamics of their numbers, range expansions and other ecological consequences of climate change are published regularly [3–5]. Howw ever,(More)
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