Clutch pattern and ovipository cycles in laying WE quail.
نویسندگان
چکیده
منابع مشابه
[Ciliogenesis in the mucous cells of the quail oviduct. I. Ultrastructural study in the laying quail]
The luminal epithelium of the oviduct (magnum) of laying quails is composed of ciliated cells and mucous cells. Ciliogenesis was observed in some of the mucous cells. Both centrioles of the diplosome migrate to the top of the cell, and one of them induces the formation of a rudimentary cilium. In some of the other cells, that are filled with mucous granules, the formation of basal bodies by an ...
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Camouflage is conferred by background matching and disruption, which are both affected by microhabitat. However, microhabitat selection that enhances camouflage has only been demonstrated in species with discrete phenotypic morphs. For most animals, phenotypic variation is continuous; here we explore whether such individuals can select microhabitats to best exploit camouflage. We use substrate ...
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Seasonal decline in clutch size is common in birds, but the proximate mechanisms for this phenomenon have not been elucidated. The most credible model to date posits that late-laying females lay fewer eggs due to a seasonal increase in the tendency to incubate during laying, which inhibits egg production. We tested this model with free-living and laboratory American Kestrels (Falco sparverius) ...
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The present study was conducted to observe the distribution pattern of phosphatases, oxidoreductases and esterases in different segments of oviduct in Punjab white quail. The study depicted that the activity of alkaline phosphatase was moderate to strong in propria submucosa of all the segments of the oviduct, while negligible to weak in other layers.The SDH, LDH and G-6-PD activity was weak to...
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Individual phenotypic characteristics of many species are influenced by non-genetic maternal effects. Female birds can influence the development of their offspring before birth via the yolk steroid content of their eggs. We investigated this prenatal maternal effect by analysing the influence of laying females' social environment on their eggs' hormonal content and on their offspring's developm...
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ژورنال
عنوان ژورنال: Japanese poultry science
سال: 1985
ISSN: 0029-0254
DOI: 10.2141/jpsa.22.297