منابع مشابه
House sparrows
Shinichi Nakagawa and Joel Pick introduce what we can learn from house sparrows.
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 کاملAn enzootic vector-borne virus is amplified at epizootic levels by an invasive avian host.
Determining the effect of an invasive species on enzootic pathogen dynamics is critical for understanding both human epidemics and wildlife epizootics. Theoretical models suggest that when a naive species enters an established host-parasite system, the new host may either reduce ('dilute') or increase ('spillback') pathogen transmission to native hosts. There are few empirical data to evaluate ...
متن کاملOvarian Growth in Tree Sparrows (spizella Arborea)
T•E gonadal responses of several species of birds exposed to stimulatory daily photoperiods of constant duration conform in that an initial rectilinear relationship exists between the logarithm of testicular weight and time on long days. They conform further in that the rate of photoinduced testicular growth, as determined from the rectilinear relationship, is a function of daylength. These and...
متن کاملMale Morphology and Nest-site Quality in House Sparrows
-Previous research on House Sparrows (Passer domesticus) in Europe indicated that males with larger bibs are more likely to obtain nest sites with multiple potential nests. To test this observation experimentally, I created nest sites containing either one or two nest boxes. 1 found no morphological differences, including bib size, between males at single-box nest sites (SBNS’s) and those at do...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1961
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay2316