Determination of Sexual Maturation Stages of Atlantic Salmon ( Salmo salar ) Captured at Sea
Radioimmunoassay (RIA) of plasma vitellogenin (Vg), estradiol (E 2 ), 11-ketotestosterone (11-keto), and gonadotropin (GtH), together with histological techniques were evaluated for determination of the maturation stage of Atlantic salmon (Salmo salar) at sea.Male salmon had lower plasma Vg, E 2 , a...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1981
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Online Access: | http://dx.doi.org/10.1139/f81-057 http://www.nrcresearchpress.com/doi/pdf/10.1139/f81-057 |
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crcansciencepubl:10.1139/f81-057 2023-12-17T10:27:24+01:00 Determination of Sexual Maturation Stages of Atlantic Salmon ( Salmo salar ) Captured at Sea Idler, D. R. Hwang, S. J. Crim, L. W. Reddin, D. 1981 http://dx.doi.org/10.1139/f81-057 http://www.nrcresearchpress.com/doi/pdf/10.1139/f81-057 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 38, issue 4, page 405-413 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1981 crcansciencepubl https://doi.org/10.1139/f81-057 2023-11-19T13:39:39Z Radioimmunoassay (RIA) of plasma vitellogenin (Vg), estradiol (E 2 ), 11-ketotestosterone (11-keto), and gonadotropin (GtH), together with histological techniques were evaluated for determination of the maturation stage of Atlantic salmon (Salmo salar) at sea.Male salmon had lower plasma Vg, E 2 , and higher 11-keto levels and could be distinguished from females several months in advance of spawning. Six female salmon were tagged at sea in 1975 in Placentia Bay and samples of blood taken. When the fish were recovered in rivers the lowest plasma Vg value was 396 μg/mL. This formed the basis of a working hypothesis, that fish with Vg values in excess of 396 μg/mL (~5–6 mo before spawning) will spawn in the year of capture. This hypothesis was supported by the Vg values of an additional 19 tagged females recaptured in Newfoundland and mainland rivers and brackish water off mainland rivers in 1976.Significant correlations between stage of gonadal development and plasma Vg, stage of gonadal development and gonadosomatic index (GSI), stage of gonadal development and plasma E 2 , plasma Vg and plasma E 2 , GSI and plasma E 2 , and between plasma Vg and 11-keto values were found for the female fish. The gonadal development of female fish from Bonavista Bay ranged between oil globule stage and secondary yolk stage. All those females which had reached the primary yolk stage would almost certainly mature and may be considered spawners of the year; on this basis 91% of the females were spawners of the year. Based on the minimum plasma Vg values, at sea, for fish which subsequently returned to the rivers, there were 86% spawners of the year among female salmon taken in Bonavista Bay. Based on plasma Vg levels, spawners of the year ranged from essentially zero in Greenland (fish captured in Greenland during August–November are not spawners of the year, except for the very few that spawn in one Greenland river) to 100% for fish caught in several other fisheries.11-Ketotestosterone was higher in the male fish than in the female ... Article in Journal/Newspaper Atlantic salmon Bonavista Bay Greenland Newfoundland Salmo salar Canadian Science Publishing (via Crossref) Greenland Canadian Journal of Fisheries and Aquatic Sciences 38 4 405 413 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Idler, D. R. Hwang, S. J. Crim, L. W. Reddin, D. Determination of Sexual Maturation Stages of Atlantic Salmon ( Salmo salar ) Captured at Sea |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Radioimmunoassay (RIA) of plasma vitellogenin (Vg), estradiol (E 2 ), 11-ketotestosterone (11-keto), and gonadotropin (GtH), together with histological techniques were evaluated for determination of the maturation stage of Atlantic salmon (Salmo salar) at sea.Male salmon had lower plasma Vg, E 2 , and higher 11-keto levels and could be distinguished from females several months in advance of spawning. Six female salmon were tagged at sea in 1975 in Placentia Bay and samples of blood taken. When the fish were recovered in rivers the lowest plasma Vg value was 396 μg/mL. This formed the basis of a working hypothesis, that fish with Vg values in excess of 396 μg/mL (~5–6 mo before spawning) will spawn in the year of capture. This hypothesis was supported by the Vg values of an additional 19 tagged females recaptured in Newfoundland and mainland rivers and brackish water off mainland rivers in 1976.Significant correlations between stage of gonadal development and plasma Vg, stage of gonadal development and gonadosomatic index (GSI), stage of gonadal development and plasma E 2 , plasma Vg and plasma E 2 , GSI and plasma E 2 , and between plasma Vg and 11-keto values were found for the female fish. The gonadal development of female fish from Bonavista Bay ranged between oil globule stage and secondary yolk stage. All those females which had reached the primary yolk stage would almost certainly mature and may be considered spawners of the year; on this basis 91% of the females were spawners of the year. Based on the minimum plasma Vg values, at sea, for fish which subsequently returned to the rivers, there were 86% spawners of the year among female salmon taken in Bonavista Bay. Based on plasma Vg levels, spawners of the year ranged from essentially zero in Greenland (fish captured in Greenland during August–November are not spawners of the year, except for the very few that spawn in one Greenland river) to 100% for fish caught in several other fisheries.11-Ketotestosterone was higher in the male fish than in the female ... |
format |
Article in Journal/Newspaper |
author |
Idler, D. R. Hwang, S. J. Crim, L. W. Reddin, D. |
author_facet |
Idler, D. R. Hwang, S. J. Crim, L. W. Reddin, D. |
author_sort |
Idler, D. R. |
title |
Determination of Sexual Maturation Stages of Atlantic Salmon ( Salmo salar ) Captured at Sea |
title_short |
Determination of Sexual Maturation Stages of Atlantic Salmon ( Salmo salar ) Captured at Sea |
title_full |
Determination of Sexual Maturation Stages of Atlantic Salmon ( Salmo salar ) Captured at Sea |
title_fullStr |
Determination of Sexual Maturation Stages of Atlantic Salmon ( Salmo salar ) Captured at Sea |
title_full_unstemmed |
Determination of Sexual Maturation Stages of Atlantic Salmon ( Salmo salar ) Captured at Sea |
title_sort |
determination of sexual maturation stages of atlantic salmon ( salmo salar ) captured at sea |
publisher |
Canadian Science Publishing |
publishDate |
1981 |
url |
http://dx.doi.org/10.1139/f81-057 http://www.nrcresearchpress.com/doi/pdf/10.1139/f81-057 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Atlantic salmon Bonavista Bay Greenland Newfoundland Salmo salar |
genre_facet |
Atlantic salmon Bonavista Bay Greenland Newfoundland Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 38, issue 4, page 405-413 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f81-057 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
38 |
container_issue |
4 |
container_start_page |
405 |
op_container_end_page |
413 |
_version_ |
1785579255915085824 |