The involvement of gonadotrophin and sex steroids in the control of reproduction in the parr and adults of Atlantic salmon, Salmo salar L.
Early sexual maturity occurred in the majority of male Atlantic salmon parr. Levels of the plasma androgens testosterone and 11‐ketotestosterone rose steadily as the male parr matured, and decreased as the testes regressed. No such progressive changes were observed in the plasma gonadotrophin (GTH)...
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1981
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crwiley:10.1111/j.1095-8649.1981.tb03760.x 2024-06-02T08:03:28+00:00 The involvement of gonadotrophin and sex steroids in the control of reproduction in the parr and adults of Atlantic salmon, Salmo salar L. Stuart‐Kregor, P. A. C. Sumpter, J. P. Dodd, J. M. 1981 http://dx.doi.org/10.1111/j.1095-8649.1981.tb03760.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1981.tb03760.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1981.tb03760.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 18, issue 1, page 59-72 ISSN 0022-1112 1095-8649 journal-article 1981 crwiley https://doi.org/10.1111/j.1095-8649.1981.tb03760.x 2024-05-03T11:13:33Z Early sexual maturity occurred in the majority of male Atlantic salmon parr. Levels of the plasma androgens testosterone and 11‐ketotestosterone rose steadily as the male parr matured, and decreased as the testes regressed. No such progressive changes were observed in the plasma gonadotrophin (GTH) levels, although the pituitary GTH levels were much higher in mature than in immature male parr; reasons for this, incluiding the possibility that the GTH radioimmunoassay employed is inadequate, are discussed. All female parr remained immature throughout the year, although the gonadosomatic index did show an annual cycle. Adult salmon had higher GTH and sex steroid levels than parr at the same stage of sexual maturity, the levels corresponding to the degree of sexual development of the adult fish. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Fish Biology 18 1 59 72 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Early sexual maturity occurred in the majority of male Atlantic salmon parr. Levels of the plasma androgens testosterone and 11‐ketotestosterone rose steadily as the male parr matured, and decreased as the testes regressed. No such progressive changes were observed in the plasma gonadotrophin (GTH) levels, although the pituitary GTH levels were much higher in mature than in immature male parr; reasons for this, incluiding the possibility that the GTH radioimmunoassay employed is inadequate, are discussed. All female parr remained immature throughout the year, although the gonadosomatic index did show an annual cycle. Adult salmon had higher GTH and sex steroid levels than parr at the same stage of sexual maturity, the levels corresponding to the degree of sexual development of the adult fish. |
format |
Article in Journal/Newspaper |
author |
Stuart‐Kregor, P. A. C. Sumpter, J. P. Dodd, J. M. |
spellingShingle |
Stuart‐Kregor, P. A. C. Sumpter, J. P. Dodd, J. M. The involvement of gonadotrophin and sex steroids in the control of reproduction in the parr and adults of Atlantic salmon, Salmo salar L. |
author_facet |
Stuart‐Kregor, P. A. C. Sumpter, J. P. Dodd, J. M. |
author_sort |
Stuart‐Kregor, P. A. C. |
title |
The involvement of gonadotrophin and sex steroids in the control of reproduction in the parr and adults of Atlantic salmon, Salmo salar L. |
title_short |
The involvement of gonadotrophin and sex steroids in the control of reproduction in the parr and adults of Atlantic salmon, Salmo salar L. |
title_full |
The involvement of gonadotrophin and sex steroids in the control of reproduction in the parr and adults of Atlantic salmon, Salmo salar L. |
title_fullStr |
The involvement of gonadotrophin and sex steroids in the control of reproduction in the parr and adults of Atlantic salmon, Salmo salar L. |
title_full_unstemmed |
The involvement of gonadotrophin and sex steroids in the control of reproduction in the parr and adults of Atlantic salmon, Salmo salar L. |
title_sort |
involvement of gonadotrophin and sex steroids in the control of reproduction in the parr and adults of atlantic salmon, salmo salar l. |
publisher |
Wiley |
publishDate |
1981 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1981.tb03760.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1981.tb03760.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1981.tb03760.x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Biology volume 18, issue 1, page 59-72 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1981.tb03760.x |
container_title |
Journal of Fish Biology |
container_volume |
18 |
container_issue |
1 |
container_start_page |
59 |
op_container_end_page |
72 |
_version_ |
1800747997010591744 |