Induction of precocious sexual development in female pink salmon ( Oncorhynchus gorbuscha )
Acceleration of ovarian maturation was achieved in immature pink salmon (Oncorhynchus gorbuscha) with injections of chinook (spring) salmon (Oncorhynchus tshawytscha) gonadotropin alone, and in combination with estradiol 17β. Oocytes containing yolk globules were evident in fish treated three times...
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Canadian Science Publishing
1973
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crcansciencepubl:10.1139/z73-074 2024-03-03T08:47:41+00:00 Induction of precocious sexual development in female pink salmon ( Oncorhynchus gorbuscha ) Funk, James D. Donaldson, Edward M. Dye, Helen M. 1973 http://dx.doi.org/10.1139/z73-074 http://www.nrcresearchpress.com/doi/pdf/10.1139/z73-074 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 51, issue 5, page 493-500 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1973 crcansciencepubl https://doi.org/10.1139/z73-074 2024-02-07T10:53:38Z Acceleration of ovarian maturation was achieved in immature pink salmon (Oncorhynchus gorbuscha) with injections of chinook (spring) salmon (Oncorhynchus tshawytscha) gonadotropin alone, and in combination with estradiol 17β. Oocytes containing yolk globules were evident in fish treated three times per week with 1.0 μg/g body weight salmon gonadotropin in combination with 1.5 μg/g body weight estradiol 17β for 126 days. After 168 days they were also seen in salmon treated with the same dosage of salmon gonadotropin alone. Estradiol 17β alone, at a dosage of 15 μg/g body weight, or in combination with salmon gonadotropin, inhibited vitellogenesis. Formation of oocytes 2 mm in diameter required [Formula: see text] months of treatment with 1.0 μg/g body weight salmon gonadotropin in combination with 1.5 μg/g body weight estradiol 17β, and 9 months of injections with 1.0 μg/g body weight gonadotropin alone. Few large yolky oocytes were developed by any of the treatments. Large numbers of preovulatory corpora atretica were observed in all treated fish.Only a small amount of histochemically demonstrable Δ5-3β hydroxysteroid dehydrogenase activity was present in ovaries from pink or chinook salmon juveniles treated for 3 months with various dosages of salmon gonadotropin. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Canadian Science Publishing Canadian Journal of Zoology 51 5 493 500 |
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. Dye, Helen M. Induction of precocious sexual development in female pink salmon ( Oncorhynchus gorbuscha ) |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Acceleration of ovarian maturation was achieved in immature pink salmon (Oncorhynchus gorbuscha) with injections of chinook (spring) salmon (Oncorhynchus tshawytscha) gonadotropin alone, and in combination with estradiol 17β. Oocytes containing yolk globules were evident in fish treated three times per week with 1.0 μg/g body weight salmon gonadotropin in combination with 1.5 μg/g body weight estradiol 17β for 126 days. After 168 days they were also seen in salmon treated with the same dosage of salmon gonadotropin alone. Estradiol 17β alone, at a dosage of 15 μg/g body weight, or in combination with salmon gonadotropin, inhibited vitellogenesis. Formation of oocytes 2 mm in diameter required [Formula: see text] months of treatment with 1.0 μg/g body weight salmon gonadotropin in combination with 1.5 μg/g body weight estradiol 17β, and 9 months of injections with 1.0 μg/g body weight gonadotropin alone. Few large yolky oocytes were developed by any of the treatments. Large numbers of preovulatory corpora atretica were observed in all treated fish.Only a small amount of histochemically demonstrable Δ5-3β hydroxysteroid dehydrogenase activity was present in ovaries from pink or chinook salmon juveniles treated for 3 months with various dosages of salmon gonadotropin. |
format |
Article in Journal/Newspaper |
author |
Funk, James D. Donaldson, Edward M. Dye, Helen M. |
author_facet |
Funk, James D. Donaldson, Edward M. Dye, Helen M. |
author_sort |
Funk, James D. |
title |
Induction of precocious sexual development in female pink salmon ( Oncorhynchus gorbuscha ) |
title_short |
Induction of precocious sexual development in female pink salmon ( Oncorhynchus gorbuscha ) |
title_full |
Induction of precocious sexual development in female pink salmon ( Oncorhynchus gorbuscha ) |
title_fullStr |
Induction of precocious sexual development in female pink salmon ( Oncorhynchus gorbuscha ) |
title_full_unstemmed |
Induction of precocious sexual development in female pink salmon ( Oncorhynchus gorbuscha ) |
title_sort |
induction of precocious sexual development in female pink salmon ( oncorhynchus gorbuscha ) |
publisher |
Canadian Science Publishing |
publishDate |
1973 |
url |
http://dx.doi.org/10.1139/z73-074 http://www.nrcresearchpress.com/doi/pdf/10.1139/z73-074 |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
Canadian Journal of Zoology volume 51, issue 5, page 493-500 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z73-074 |
container_title |
Canadian Journal of Zoology |
container_volume |
51 |
container_issue |
5 |
container_start_page |
493 |
op_container_end_page |
500 |
_version_ |
1792503924293369856 |