Induction of precocious sexual maturity in male pink salmon ( Oncorhynchus gorbuscha )
In the juvenile male pink salmon (Oncorhynchus gorbuscha) complete sexual maturity was attained by September in the year of hatching with thrice-weekly treatments of 10.0 and 1.0 μg partially purified salmon (Oncorhynchus tshawytscha) gonadotropin (SG-G100) per gram body weight. The time of onset of...
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Language: | English |
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Canadian Science Publishing
1972
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Online Access: | http://dx.doi.org/10.1139/z72-190 http://www.nrcresearchpress.com/doi/pdf/10.1139/z72-190 |
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crcansciencepubl:10.1139/z72-190 2024-03-03T08:47:41+00:00 Induction of precocious sexual maturity in male pink salmon ( Oncorhynchus gorbuscha ) Funk, James D. Donaldson, Edward M. 1972 http://dx.doi.org/10.1139/z72-190 http://www.nrcresearchpress.com/doi/pdf/10.1139/z72-190 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 50, issue 11, page 1413-1419 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1972 crcansciencepubl https://doi.org/10.1139/z72-190 2024-02-07T10:53:43Z In the juvenile male pink salmon (Oncorhynchus gorbuscha) complete sexual maturity was attained by September in the year of hatching with thrice-weekly treatments of 10.0 and 1.0 μg partially purified salmon (Oncorhynchus tshawytscha) gonadotropin (SG-G100) per gram body weight. The time of onset of mitotic division of spermatogonia and the rate of spermiogenesis were accelerated in the precociously mature testes. At sexual maturity, a scattering of localizations of Δ5-3 β hydroxysteroid dehydrogenase activity was observed in the testes which corresponded to the distribution of the interstitial cells. A stock of larger pink salmon (body weight at maturity 64.2 g) developed mature testes in the same time interval as the smaller sized individuals, but in these the gonads were four times larger. Immature Oncorhynchus tshawytscha matured more slowly and showed less 3 β-ol dehydrogenase activity in response to SG-G100 than the pink salmon. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Canadian Science Publishing Canadian Journal of Zoology 50 11 1413 1419 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Funk, James D. Donaldson, Edward M. Induction of precocious sexual maturity in male pink salmon ( Oncorhynchus gorbuscha ) |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
In the juvenile male pink salmon (Oncorhynchus gorbuscha) complete sexual maturity was attained by September in the year of hatching with thrice-weekly treatments of 10.0 and 1.0 μg partially purified salmon (Oncorhynchus tshawytscha) gonadotropin (SG-G100) per gram body weight. The time of onset of mitotic division of spermatogonia and the rate of spermiogenesis were accelerated in the precociously mature testes. At sexual maturity, a scattering of localizations of Δ5-3 β hydroxysteroid dehydrogenase activity was observed in the testes which corresponded to the distribution of the interstitial cells. A stock of larger pink salmon (body weight at maturity 64.2 g) developed mature testes in the same time interval as the smaller sized individuals, but in these the gonads were four times larger. Immature Oncorhynchus tshawytscha matured more slowly and showed less 3 β-ol dehydrogenase activity in response to SG-G100 than the pink salmon. |
format |
Article in Journal/Newspaper |
author |
Funk, James D. Donaldson, Edward M. |
author_facet |
Funk, James D. Donaldson, Edward M. |
author_sort |
Funk, James D. |
title |
Induction of precocious sexual maturity in male pink salmon ( Oncorhynchus gorbuscha ) |
title_short |
Induction of precocious sexual maturity in male pink salmon ( Oncorhynchus gorbuscha ) |
title_full |
Induction of precocious sexual maturity in male pink salmon ( Oncorhynchus gorbuscha ) |
title_fullStr |
Induction of precocious sexual maturity in male pink salmon ( Oncorhynchus gorbuscha ) |
title_full_unstemmed |
Induction of precocious sexual maturity in male pink salmon ( Oncorhynchus gorbuscha ) |
title_sort |
induction of precocious sexual maturity in male pink salmon ( oncorhynchus gorbuscha ) |
publisher |
Canadian Science Publishing |
publishDate |
1972 |
url |
http://dx.doi.org/10.1139/z72-190 http://www.nrcresearchpress.com/doi/pdf/10.1139/z72-190 |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
Canadian Journal of Zoology volume 50, issue 11, page 1413-1419 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z72-190 |
container_title |
Canadian Journal of Zoology |
container_volume |
50 |
container_issue |
11 |
container_start_page |
1413 |
op_container_end_page |
1419 |
_version_ |
1792503923311902720 |