Use of Fish Pituitaries to Induce Spawning in Channel Catfish PDF Download
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Author: Kermit E. Sneed
Publisher:
ISBN:
Category : Catfishes
Languages : en
Pages : 18
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Book Description
Seventy-two pairs of channel catfish Ictalurus punctatus were induced to spawn in glass aquaria by injecting fish pituitary into the females. Control of peritoneal lesions, infections, and adhesions, was anticipated by including 10,000 unites of crystalline penicillin-G with each injection. Spawning was induced by injecting acetone-dried pituitaries from carp, buffalofish, flathead and channel catfish, and gar. Pituitaries from these various species differed little, regardless of time of collection. The amount of pituitary material required to induce spawning varied from 3 to 32 milligrams per pound of fish weight, given in from 1 to 28 injections, with an average of 3. Most females required 3 injections at 2 milligrams per pound of body weight every 24 hours. The period of time from the last injection to spawning varied from 2 1/2 hours to 72 hours, but averaged 16 to 24 hours.
Author: Kermit E. Sneed
Publisher:
ISBN:
Category : Catfishes
Languages : en
Pages : 18
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Book Description
Seventy-two pairs of channel catfish Ictalurus punctatus were induced to spawn in glass aquaria by injecting fish pituitary into the females. Control of peritoneal lesions, infections, and adhesions, was anticipated by including 10,000 unites of crystalline penicillin-G with each injection. Spawning was induced by injecting acetone-dried pituitaries from carp, buffalofish, flathead and channel catfish, and gar. Pituitaries from these various species differed little, regardless of time of collection. The amount of pituitary material required to induce spawning varied from 3 to 32 milligrams per pound of fish weight, given in from 1 to 28 injections, with an average of 3. Most females required 3 injections at 2 milligrams per pound of body weight every 24 hours. The period of time from the last injection to spawning varied from 2 1/2 hours to 72 hours, but averaged 16 to 24 hours.
Author: Howard Paul Clemens
Publisher:
ISBN:
Category : Biological assay
Languages : en
Pages : 40
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Book Description
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.
Author: Howard Paul Clemens
Publisher:
ISBN:
Category : Channel catfish
Languages : en
Pages : 18
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Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 22
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Author: Howard P. Clemens
Publisher: Forgotten Books
ISBN: 9780484559379
Category : Science
Languages : en
Pages : 20
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Book Description
Excerpt from The Spawning Behavior of the Channel Catfish Ictalurus Punctatus Fish for spawning were selected during the breeding season, from the middle of April to the last week in July when water temperatures ranged from 70 to 85 F According to oral reports from the Federal fish-culturists of the southwestern United States, the largest or old est fish spawn first, while the smallest fish are usually the last to spawn. Each selected female was placed with a male in an aquarium The condition of the females for spawning was rated excellent, al though it was always difficult to evaluate the exact physiological condition. Each female was well-rounded, and the roundness of the abdomen extended past the pelvics tothe genital orifice. The belly was flaccid, and the genitals were raised and reddish. The females ranged from l4'to 17 inches in length. They received pituitary injections to induce spawning. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Craig C. Tucker
Publisher: Springer Science & Business Media
ISBN: 9780412123313
Category : Science
Languages : en
Pages : 474
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Author: Brian J. Harvey
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 54
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 1208
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Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 790
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Author: Bruce D. Rogers
Publisher:
ISBN:
Category : Catfishes
Languages : en
Pages : 24
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