Feeding, Reconditioning, and Rematuration Responses of Captive Atlantic Salmon ( Salmo salar ) Kelt
Wild Atlantic salmon (Salmo salar) kelt were reconditioned in the laboratory by initiating their feeding during the winter on freshly thawed Atlantic silverside (Menidia menidia) supplemented with vitamins and trace minerals. Some kelt improved in condition by April, and by June the majority were re...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1992
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Online Access: | http://dx.doi.org/10.1139/f92-203 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-203 |
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crcansciencepubl:10.1139/f92-203 2023-12-17T10:27:20+01:00 Feeding, Reconditioning, and Rematuration Responses of Captive Atlantic Salmon ( Salmo salar ) Kelt Crim, L. W. Wilson, C. E. So, Y. P. Idler, D. R. Johnston, C. E. 1992 http://dx.doi.org/10.1139/f92-203 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-203 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 9, page 1835-1842 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1992 crcansciencepubl https://doi.org/10.1139/f92-203 2023-11-19T13:38:59Z Wild Atlantic salmon (Salmo salar) kelt were reconditioned in the laboratory by initiating their feeding during the winter on freshly thawed Atlantic silverside (Menidia menidia) supplemented with vitamins and trace minerals. Some kelt improved in condition by April, and by June the majority were reconditioned. Some females skipped a year of reproductive activity with most rematuring a second time the following year. One group of females rematured and was spawned a third time without skipping another reproductive cycle. Plasma levels of vitellogenin, estradiol, and testosterone remained low in reproductively inactive female kelt; in contrast, these substances increased and peaked just prior to spawning in late October in maturing female kelt. In males, plasma levels of testosterone and 11-ketotestosterone rose in conjunction with testicular development, reaching peak hormone values during the period of spermiation. Although good-quality eggs were collected from reconditioned kelt according to high egg fertilization rates and high rates of egg survival through the eyed and hatching stages, most kelt yolksac larvae died just prior to swim-up. High mortality rates for kelt larvae suggest that either the silverside diet is nutritionally deficient or that the physiology of reconditioned kelt broodstock is inadequate for good-quality egg production. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 49 9 1835 1842 |
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 Crim, L. W. Wilson, C. E. So, Y. P. Idler, D. R. Johnston, C. E. Feeding, Reconditioning, and Rematuration Responses of Captive Atlantic Salmon ( Salmo salar ) Kelt |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Wild Atlantic salmon (Salmo salar) kelt were reconditioned in the laboratory by initiating their feeding during the winter on freshly thawed Atlantic silverside (Menidia menidia) supplemented with vitamins and trace minerals. Some kelt improved in condition by April, and by June the majority were reconditioned. Some females skipped a year of reproductive activity with most rematuring a second time the following year. One group of females rematured and was spawned a third time without skipping another reproductive cycle. Plasma levels of vitellogenin, estradiol, and testosterone remained low in reproductively inactive female kelt; in contrast, these substances increased and peaked just prior to spawning in late October in maturing female kelt. In males, plasma levels of testosterone and 11-ketotestosterone rose in conjunction with testicular development, reaching peak hormone values during the period of spermiation. Although good-quality eggs were collected from reconditioned kelt according to high egg fertilization rates and high rates of egg survival through the eyed and hatching stages, most kelt yolksac larvae died just prior to swim-up. High mortality rates for kelt larvae suggest that either the silverside diet is nutritionally deficient or that the physiology of reconditioned kelt broodstock is inadequate for good-quality egg production. |
format |
Article in Journal/Newspaper |
author |
Crim, L. W. Wilson, C. E. So, Y. P. Idler, D. R. Johnston, C. E. |
author_facet |
Crim, L. W. Wilson, C. E. So, Y. P. Idler, D. R. Johnston, C. E. |
author_sort |
Crim, L. W. |
title |
Feeding, Reconditioning, and Rematuration Responses of Captive Atlantic Salmon ( Salmo salar ) Kelt |
title_short |
Feeding, Reconditioning, and Rematuration Responses of Captive Atlantic Salmon ( Salmo salar ) Kelt |
title_full |
Feeding, Reconditioning, and Rematuration Responses of Captive Atlantic Salmon ( Salmo salar ) Kelt |
title_fullStr |
Feeding, Reconditioning, and Rematuration Responses of Captive Atlantic Salmon ( Salmo salar ) Kelt |
title_full_unstemmed |
Feeding, Reconditioning, and Rematuration Responses of Captive Atlantic Salmon ( Salmo salar ) Kelt |
title_sort |
feeding, reconditioning, and rematuration responses of captive atlantic salmon ( salmo salar ) kelt |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/f92-203 http://www.nrcresearchpress.com/doi/pdf/10.1139/f92-203 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 49, issue 9, page 1835-1842 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f92-203 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
49 |
container_issue |
9 |
container_start_page |
1835 |
op_container_end_page |
1842 |
_version_ |
1785579170524299264 |