Bioassay and use of pituitary materials to spawn warm-water fishes /
Howard P. Clemens and Kermit E. Sneed.

Description

Main Author

Clemens, Howard P. (Howard Paul), 1923-2007.

Related Names

Sneed, Kermit E.
U.S. Fish and Wildlife Service.

Language(s)

English

Published

Washington, D.C. : U.S. Dept. of the Interior, Fish and Wildlife Service : 1962.

Subjects

Fishes > Fishes / Spawning.
Pituitary extract.
Pituitary gland.
Biological assay > Biological assay / Biological assay.

Summary

No detrimental effects of pituitary injections have been detected in incubating and hatching the eggs, or in rearing the fingerlings, from over 200 channel catfish spawns and thousands of goldfish spawns.
Actvity of pituitaries collected in various months did not vary as much as the individual variations in physical condition of the test fish. The data indicate that all the pituitaries are active in the months in which collections were made. Activity in relation to size, sex, and degree of gonadal development of the donor fish does not appear as important as implied by some previous reports in the literature.
By bioassay, evaluation was made of the activity and relative potency of pituitaries collected throughout the year from various species of fish. Positive response was indicated by ovulation of eggs or by increases in seminal plasma.

Note

Research supported by the United States Department of the Interior, Fish and Wildlife Service.

Physical Description

iv, 30 p. : ill., tables ; 25 cm.

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