Examples of masculinized female pintails Anas acuta
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چکیده
منابع مشابه
Estimation of carcass fat and protein in northern pintails (Anas acuta) during spring migration.
Foraging in stopover areas influences nutritional condition of birds during spring migration. Our purpose was to determine if body mass, percent carcass water, and serum biochemistry would predict energy reserves (carcass fat and protein) in northern pintails (Anas acuta) at a spring staging area, Lake St. Pierre in Québec, Canada (46 degrees 11 'N, 73 degrees 08 'W). Northern pintails were col...
متن کاملEvidence for intercontinental parasite exchange through molecular detection and characterization of haematozoa in northern pintails (Anas acuta) sampled throughout the North Pacific Basin
Empirical evidence supports wild birds as playing a role in the interhemispheric exchange of bacteria and viruses; however, data supporting the redistribution of parasites among continents are limited. In this study, the hypothesis that migratory birds contribute to the redistribution of parasites between continents was tested by sampling northern pintails (Anas acuta) at locations throughout t...
متن کاملMasculinized otoacoustic emissions in female spotted hyenas (Crocuta crocuta).
In humans and rhesus monkeys, click-evoked otoacoustic emissions (CEOAEs) are stronger in females than in males, and there is considerable circumstantial evidence that this sex difference is attributable to the greater exposure to androgens prenatally in males. Because female spotted hyenas are highly androgenized beginning early in prenatal development, we expected an absence of sexual dimorph...
متن کاملMasculinized female yellow-bellied marmots initiate more social interactions.
The presence of male siblings in utero influences female morphology and life-history traits because testosterone transferred among foetuses may masculinize females. Similarly, litter sex composition might alter the display of sexually dimorphic behaviour, such as play and allogrooming, since they are modulated by androgens. We explored whether masculinization alters the frequency of play and so...
متن کاملPolycystic Kidney Disease Associated With Unilateral Lameness in a Northern Pintail {Anas acuta)
A captive 10-year-old female northern pintail (Anas acuta) with a history of unilateral lameness was diagnosed at necropsy with polycystic disease most severely affecting the right kidney. The lameness was attributed to pressure on the sacral nerve plexus caused by the unusually large cyst arising from the right kidney. Polycystic kidney disease previously has been considered an incidental find...
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ژورنال
عنوان ژورنال: Journal of the Yamashina Institute for Ornithology
سال: 1976
ISSN: 1883-3659,0044-0183
DOI: 10.3312/jyio1952.8.282