Hen-feathering induced in the male fowl by feeding thyroid
نویسندگان
چکیده
منابع مشابه
Lutear Cells and Hen-feathering
The experimental evidence had made clear that some substance is produced in the testis of the male Sebright that suppresses in him the development of the secondary sexual plumage of the cock of his species. The detection in his testis of lutear cells like those in hens makes the conclusion highly probable that it is these cells that cause the suppression of cock-feathering in both the Sebright ...
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The hypothesis was tested that selection on the basis of family means for increased survival and hen-housed egg production, when sisters with intact beaks were kept together in multiple-bird cage, would cause adaptive changes in behavior. Specifically, it was posited that beak-inflicted injuries causing cannibalistic mortality and feather loss and damage would be reduced. Body weight effects we...
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Male Mounting Alone Reduces Female Promiscuity in the Fowl
The fertilization success of an insemination is at risk when a female has the possibility to copulate with multiple males, generating sperm competition and sexual conflict over remating. Female propensity to remate is often reduced after copulation, and a staggering diversity of highly derived male traits that discourage female promiscuity have been investigated. However, it is difficult to sep...
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ژورنال
عنوان ژورنال: Experimental Biology and Medicine
سال: 1922
ISSN: 1535-3702,1535-3699
DOI: 10.3181/00379727-19-120