Oxidative Stress Mediates Physiological Costs of Begging in Magpie (Pica pica) Nestlings
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منابع مشابه
Oxidative Stress Mediates Physiological Costs of Begging in Magpie (Pica pica) Nestlings
BACKGROUND Theoretical models predict that a cost is necessary to guarantee honesty in begging displays given by offspring to solicit food from their parents. There is evidence for begging costs in the form of a reduced growth rate and immunocompetence. Moreover, begging implies vigorous physical activity and attentiveness, which should increase metabolism and thus the releasing of pro-oxidant ...
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Laying date is one of the most important determinants of reproductive success and recruitment probability in birds. Late breeders usually £edge fewer chicks than individuals with earlier breeding dates, and £edglings produced late in the season have high mortality rates. Food availability and nestling mass have been evoked as the principal mechanistic links between laying date and o¡spring surv...
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—Rules of food allocation between nestlings of the black-billed magpie Pica pica, a species showing brood reduction. Aims: The existence of a size hierarchy of nestlings in a brood facilitates a secondary readjustment of brood size to resource availability, through the death of the smaller chicks when food is scarce. A mechanism to facilitate brood reduction would be for parents preferentially ...
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BACKGROUND Avian reoviruses (ARVs) cause a range of disease presentations in domestic, captive and free-living bird species. ARVs have been reported as a cause of significant disease and mortality in free-living corvid species in North America and continental Europe. Until this report, there have been no confirmed cases of ARV-associated disease in British wild birds. CASE PRESENTATION Sporad...
متن کاملFeather microstructure of the black-billed magpie (Pica pica sericea) and jungle crow (Corvus macrorhynchos).
The jungle crow (Corvus macrorhynchos) distribution stretches from eastern Eurasia continent to southeastern Asia. The distribution of the black-billed magpie (Pica pica sericea) stretches from Korea and China to the Kyushu area in Japan. They are both in the Family, Corvidae, and have iridescent feather colors, but the iridescent feather color of the black-billed magpie is more remarkable than...
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ژورنال
عنوان ژورنال: PLoS ONE
سال: 2012
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0040367