Blood Metabolite and Corticosterone Levels in Breeding Adult Pied Flycatchers
نویسندگان
چکیده
منابع مشابه
Sex-Specific Associations Between Nest Defence, Exploration and Breathing Rate in Breeding Pied Flycatchers
Correlations between behavioural traits constrain animals to a limited range of behavioural choices and set a limit to the available variation in behavioural phenotype of a population. These constraints are especially important during stressful situations, potentially limiting the ability to cope with stress appropriately. As yet, very little consideration has been given to a possible role for ...
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Traditional explanations for the negative fitness consequences of parasitism have focused on the direct pathogenic effects of infectious agents. However, because of the high selection pressure by the parasites, immune defences are likely to be costly and trade off with other fitness-related traits, such as reproductive effort. In a field experiment, we immunized breeding female flycatchers with...
متن کاملGender and viability selection on morphology in fledgling pied flycatchers.
Until recently, analyses of gender-dependent differences in viability selection and the ontogeny of sexual size dimorphism have been plagued by difficulties in determining the sex of nestling birds on the basis of morphology. Recently, this problem was overcome using molecular sex identification to report for the first time body-size-mediated antagonistic selection on the viability of male and ...
متن کاملSnail consumption and breeding performance of pied flycatchers (Ficedula hypoleuca) along a pollution gradient in the Middle Urals, Russia.
During the years 1989-91, 1997-2003, and 2005-07, we studied how emissions from the Middle Urals copper smelter affect snail availability and reproduction of free-living pied flycatchers (Ficedula hypoleuca). We counted snail shells dropped in nests and analysed food samples of nestlings. Pied flycatchers brought to nestlings fewer shells in heavily polluted sites compared to background sites, ...
متن کاملVortex wake, downwash distribution, aerodynamic performance and wingbeat kinematics in slow-flying pied flycatchers.
Many small passerines regularly fly slowly when catching prey, flying in cluttered environments or landing on a perch or nest. While flying slowly, passerines generate most of the flight forces during the downstroke, and have a 'feathered upstroke' during which they make their wing inactive by retracting it close to the body and by spreading the primary wing feathers. How this flight mode relat...
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ژورنال
عنوان ژورنال: The Condor
سال: 2005
ISSN: 0010-5422,1938-5129
DOI: 10.1093/condor/107.3.665