منابع مشابه
House sparrows
Shinichi Nakagawa and Joel Pick introduce what we can learn from house sparrows.
متن کاملSupplementary feeding increases nestling feather corticosterone early in the breeding season in house sparrows
Several studies on birds have proposed that a lack of invertebrate prey in urbanized areas could be the main cause for generally lower levels of breeding success compared to rural habitats. Previous work on house sparrows Passer domesticus found that supplemental feeding in urbanized areas increased breeding success but did not contribute to population growth. Here, we hypothesize that suppleme...
متن کاملCorticosterone regulation in house sparrows invading Senegal.
What traits help organisms expand their ranges? Several behavioral and life history traits have been identified, but physiological and especially endocrinological factors have been minimally considered. Here, we asked whether steroid hormonal responses to stressors might be important. Previously, we found that corticosterone (CORT) responses to a standard restraint stressor were stronger at a r...
متن کاملEffect of Ephemeral Food Restriction on Growth of House Sparrows
—We tested for the presence of compensatory growth (i.e. faster age-specific growth) following ephemeral periods of food restriction in altricial nestlings using the House Sparrow (Passer domesticus) as a model species. To simulate periods of poor food conditions, we raised nestlings in captivity, fed them a synthetic diet, and held them at constant body mass for 48 h beginning on either day 3 ...
متن کاملEffects of season on kidney morphology in house sparrows.
Seasonal variability in kidney morphology of the house sparrow Passer domesticus was examined using light microscopy. Sparrows were captured from the wild in winter, spring, summer and autumn. The kidneys were perfused with half-strength Karnovsky's fixative and processed for light microscopy by embedding in either paraffin wax or JB4 acrylic resin. Absolute volumes of the kidneys, their compon...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1991
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay5186