The physiology of reproduction (1922) (20576152499)

Title: The physiology of reproduction
Identifier: cu31924021457712 (find matches)
Year: 1922 (1920s)
Authors: Marshall, F. H. A. (Francis Hugh Adam), 1878-1949
Subjects: Reproduction
Publisher: London, New York (etc. ) Longmans, Green, and co.
Contributing Library: Cornell University Library
Digitizing Sponsor: MSN

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Text Appearing Before Image:
THE TESTICLE AND THE OVARY 343 P^zard 1 ol:)taine(l results on the whole similar, Init conchided that ovariotomy had no influence (jn the development of the comb. Moreover, the siclde and other characteristically male feathers did not appear. The spayed lieu Pezard regards as Ijeing a neutral type like the castrated cock (see ahove, p. 334). By transplanting ovarian tissue on to a castrated male the growth of the spurs, etc..
Text Appearing After Image:
Fill. 8.7).—iSucces.sive stages in the growth of the spui's of a hen after ovaiiotomy : (left) six mouths after ; (right) one yeai' after ; (bottom) two years after ; (top) si.\ years after. (From Pezard.) could be inhildted and the )>ird Ix'come feminised, Goodale also lias feminised a male 1iird l)y o\'arian traiisplantatinn fdllowing du castration. Gocdale removed the ovaries from ducks and found tliat the spayed female may or may not completely assume the perfect male plumage. One bird after complete ovai-iotomy did not even assume the eclipse plumage l)ut retained the nuptial p)\nnage of the drake. ' Pezard, Aic eiJ. (see atiove, p. 334).

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