Predation on stocked Atlantic salmon ( Salmo salar) fry
We studied predatorprey interactions between juvenile Atlantic salmon (Salmo salar) and trout in three Massachusetts, U.S.A., streams and in artificial streams. We sampled stomach contents of age-1+ and older salmon and trout (Salvelinus fontinalis, Salmo trutta) following salmon fry stocking in th...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/f03-001 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-001 |
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crcansciencepubl:10.1139/f03-001 2024-09-15T17:55:56+00:00 Predation on stocked Atlantic salmon ( Salmo salar) fry Henderson, J Nathan Letcher, Benjamin H 2003 http://dx.doi.org/10.1139/f03-001 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-001 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 60, issue 1, page 32-42 ISSN 0706-652X 1205-7533 journal-article 2003 crcansciencepubl https://doi.org/10.1139/f03-001 2024-07-25T04:10:07Z We studied predatorprey interactions between juvenile Atlantic salmon (Salmo salar) and trout in three Massachusetts, U.S.A., streams and in artificial streams. We sampled stomach contents of age-1+ and older salmon and trout (Salvelinus fontinalis, Salmo trutta) following salmon fry stocking in the spring of 1997 and 1998. Between 4.3 and 48.6% of the stocked fry were consumed within the first 2 days after stocking, and total fry mortality from predation varied from 4.3 to 60.7%. No significant differences were found between stomach weights of predators ( without fry weight) that consumed fry and those that did not. Artificial stream experiments testing effects of habitat complexity and predator species on predator consumption rates revealed that consumption rates were not different between brook (S. fontinalis) and brown (S. trutta) trout (p = 0.59). Predation rate tended to decrease as the percentage of riffle habitat increased but the decrease was not significant (p = 0.22). Our results indicate that predation on stocked Atlantic salmon fry can be substantial (up to 60%), appears to be short lived (2 days), and is not related in a simple way to abiotic and biotic factors. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 60 1 32 42 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
We studied predatorprey interactions between juvenile Atlantic salmon (Salmo salar) and trout in three Massachusetts, U.S.A., streams and in artificial streams. We sampled stomach contents of age-1+ and older salmon and trout (Salvelinus fontinalis, Salmo trutta) following salmon fry stocking in the spring of 1997 and 1998. Between 4.3 and 48.6% of the stocked fry were consumed within the first 2 days after stocking, and total fry mortality from predation varied from 4.3 to 60.7%. No significant differences were found between stomach weights of predators ( without fry weight) that consumed fry and those that did not. Artificial stream experiments testing effects of habitat complexity and predator species on predator consumption rates revealed that consumption rates were not different between brook (S. fontinalis) and brown (S. trutta) trout (p = 0.59). Predation rate tended to decrease as the percentage of riffle habitat increased but the decrease was not significant (p = 0.22). Our results indicate that predation on stocked Atlantic salmon fry can be substantial (up to 60%), appears to be short lived (2 days), and is not related in a simple way to abiotic and biotic factors. |
format |
Article in Journal/Newspaper |
author |
Henderson, J Nathan Letcher, Benjamin H |
spellingShingle |
Henderson, J Nathan Letcher, Benjamin H Predation on stocked Atlantic salmon ( Salmo salar) fry |
author_facet |
Henderson, J Nathan Letcher, Benjamin H |
author_sort |
Henderson, J Nathan |
title |
Predation on stocked Atlantic salmon ( Salmo salar) fry |
title_short |
Predation on stocked Atlantic salmon ( Salmo salar) fry |
title_full |
Predation on stocked Atlantic salmon ( Salmo salar) fry |
title_fullStr |
Predation on stocked Atlantic salmon ( Salmo salar) fry |
title_full_unstemmed |
Predation on stocked Atlantic salmon ( Salmo salar) fry |
title_sort |
predation on stocked atlantic salmon ( salmo salar) fry |
publisher |
Canadian Science Publishing |
publishDate |
2003 |
url |
http://dx.doi.org/10.1139/f03-001 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-001 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 60, issue 1, page 32-42 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f03-001 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
60 |
container_issue |
1 |
container_start_page |
32 |
op_container_end_page |
42 |
_version_ |
1810432150605922304 |