Winter growth and survival of juvenile Atlantic salmon ( Salmo salar ) in experimental raceways
We used experimental raceways to determine overwinter mortality of wild-reared immature and mature post-young-of-the-year Atlantic salmon (Salmo salar). Secondarily, we investigated the effects of differing treatments (velocity and shelter) on winter growth and survival. Overall survival from Novemb...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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2004
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Online Access: | http://dx.doi.org/10.1139/f04-212 http://www.nrcresearchpress.com/doi/pdf/10.1139/f04-212 |
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crcansciencepubl:10.1139/f04-212 2023-12-17T10:27:20+01:00 Winter growth and survival of juvenile Atlantic salmon ( Salmo salar ) in experimental raceways Parrish, Donna L Hawes, Ethan J Whalen, Kevin G 2004 http://dx.doi.org/10.1139/f04-212 http://www.nrcresearchpress.com/doi/pdf/10.1139/f04-212 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 61, issue 12, page 2350-2357 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2004 crcansciencepubl https://doi.org/10.1139/f04-212 2023-11-19T13:38:46Z We used experimental raceways to determine overwinter mortality of wild-reared immature and mature post-young-of-the-year Atlantic salmon (Salmo salar). Secondarily, we investigated the effects of differing treatments (velocity and shelter) on winter growth and survival. Overall survival from November to April was 94%, and survival of immature (98%) and mature (90%) parr, although statistically different, was very similar. Immature parr grew more in length than mature parr, and both immature and mature parr in higher velocity (12 cm·s 1 ) raceways grew more than those in lower velocity (0.6 cm·s 1 ) raceways. Stomach contents were twofold greater in parr occupying higher velocity raceways than those in lower velocity raceways. Caloric content of immature and mature parr did not differ in any of five monthly samples. Lowest caloric content occurred in early February and increased between February and March when water temperatures were well below those considered optimal for growth. Although ice cover was present, isolating parr from conditions that occur in natural settings may have helped parr achieve nearly 2.5 times greater survival than parr in the wild. Further, whereas previous studies showed parr select habitats to minimize energetic loss, our results show a distinct advantage for parr to expend energy to feed during winter. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 61 12 2350 2357 |
institution |
Open Polar |
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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 Parrish, Donna L Hawes, Ethan J Whalen, Kevin G Winter growth and survival of juvenile Atlantic salmon ( Salmo salar ) in experimental raceways |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
We used experimental raceways to determine overwinter mortality of wild-reared immature and mature post-young-of-the-year Atlantic salmon (Salmo salar). Secondarily, we investigated the effects of differing treatments (velocity and shelter) on winter growth and survival. Overall survival from November to April was 94%, and survival of immature (98%) and mature (90%) parr, although statistically different, was very similar. Immature parr grew more in length than mature parr, and both immature and mature parr in higher velocity (12 cm·s 1 ) raceways grew more than those in lower velocity (0.6 cm·s 1 ) raceways. Stomach contents were twofold greater in parr occupying higher velocity raceways than those in lower velocity raceways. Caloric content of immature and mature parr did not differ in any of five monthly samples. Lowest caloric content occurred in early February and increased between February and March when water temperatures were well below those considered optimal for growth. Although ice cover was present, isolating parr from conditions that occur in natural settings may have helped parr achieve nearly 2.5 times greater survival than parr in the wild. Further, whereas previous studies showed parr select habitats to minimize energetic loss, our results show a distinct advantage for parr to expend energy to feed during winter. |
format |
Article in Journal/Newspaper |
author |
Parrish, Donna L Hawes, Ethan J Whalen, Kevin G |
author_facet |
Parrish, Donna L Hawes, Ethan J Whalen, Kevin G |
author_sort |
Parrish, Donna L |
title |
Winter growth and survival of juvenile Atlantic salmon ( Salmo salar ) in experimental raceways |
title_short |
Winter growth and survival of juvenile Atlantic salmon ( Salmo salar ) in experimental raceways |
title_full |
Winter growth and survival of juvenile Atlantic salmon ( Salmo salar ) in experimental raceways |
title_fullStr |
Winter growth and survival of juvenile Atlantic salmon ( Salmo salar ) in experimental raceways |
title_full_unstemmed |
Winter growth and survival of juvenile Atlantic salmon ( Salmo salar ) in experimental raceways |
title_sort |
winter growth and survival of juvenile atlantic salmon ( salmo salar ) in experimental raceways |
publisher |
Canadian Science Publishing |
publishDate |
2004 |
url |
http://dx.doi.org/10.1139/f04-212 http://www.nrcresearchpress.com/doi/pdf/10.1139/f04-212 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 61, issue 12, page 2350-2357 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f04-212 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
61 |
container_issue |
12 |
container_start_page |
2350 |
op_container_end_page |
2357 |
_version_ |
1785579165485891584 |