ENDOCRINE FACTORS INVOLVED IN THE FAILURE OF PINTAIL DUCKS ANAS ACUTA TO REPRODUCE IN CAPTIVITY

SUMMARY Pintail ducks captured from migrating flocks and held in captivity fail to show ovarian development. Bioassay of their pituitary glands revealed a lack of gonadotrophin secretion. In the closely related Mallards, which also fail to reproduce in captivity, avian gonadotrophin injections, eith...

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Bibliographic Details
Published in:Journal of Endocrinology
Main Authors: PHILLIPS, R. E., VAN TIENHOVEN, A.
Format: Article in Journal/Newspaper
Language:unknown
Published: Bioscientifica 1960
Subjects:
Endocrinology
Endocrinology, Diabetes and Metabolism
Anas acuta
Online Access:http://dx.doi.org/10.1677/joe.0.0210253
https://joe.bioscientifica.com/view/journals/joe/21/3/joe_21_3_002.xml
https://joe.bioscientifica.com/downloadpdf/journals/joe/21/3/joe_21_3_002.xml
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Summary:SUMMARY Pintail ducks captured from migrating flocks and held in captivity fail to show ovarian development. Bioassay of their pituitary glands revealed a lack of gonadotrophin secretion. In the closely related Mallards, which also fail to reproduce in captivity, avian gonadotrophin injections, either 15–30 mg/day alone or 10–12 mg/day in combination with diethylstilboestrol, caused nearly normal ovarian follicular development. Oestrogen and gonadotrophins acted synergistically to produce a series of follicles with normal gradations in size. Oestrogen alone stimulated ovarian weight of ducks and immature chickens, but in immature chickens it did not synergize with exogenous gonadotrophins.

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