Survival of migrating sea trout ( Salmo trutta) and Atlantic salmon ( Salmo salar) smolts negotiating weirs in small Danish rivers
Abstract – The survival of brown trout and Atlantic salmon smolts during passage over small weirs was estimated in two small Danish rivers during the spring of 1998. Parallel groups of smolts were released upstream and downstream of the weirs and recaptured in traps further downstream. The results s...
Published in: | Ecology of Freshwater Fish |
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Online Access: | http://dx.doi.org/10.1034/j.1600-0633.2003.00027.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1034%2Fj.1600-0633.2003.00027.x https://onlinelibrary.wiley.com/doi/pdf/10.1034/j.1600-0633.2003.00027.x |
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crwiley:10.1034/j.1600-0633.2003.00027.x 2024-09-15T17:56:02+00:00 Survival of migrating sea trout ( Salmo trutta) and Atlantic salmon ( Salmo salar) smolts negotiating weirs in small Danish rivers Aarestrup, K. Koed, A. 2003 http://dx.doi.org/10.1034/j.1600-0633.2003.00027.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1034%2Fj.1600-0633.2003.00027.x https://onlinelibrary.wiley.com/doi/pdf/10.1034/j.1600-0633.2003.00027.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 12, issue 3, page 169-176 ISSN 0906-6691 1600-0633 journal-article 2003 crwiley https://doi.org/10.1034/j.1600-0633.2003.00027.x 2024-07-23T04:14:51Z Abstract – The survival of brown trout and Atlantic salmon smolts during passage over small weirs was estimated in two small Danish rivers during the spring of 1998. Parallel groups of smolts were released upstream and downstream of the weirs and recaptured in traps further downstream. The results showed a smolt loss varying from 18 to 71% for trout and 53% for salmon. Furthermore, the surviving smolts from the upstream groups were delayed for up to 9 days compared to downstream groups. The study demonstrated that an increased proportion of total river discharge allocated to fish passage increased the smolt survival. Losses may be because of fish penetrating grids erected at fish farm inlets, predation and delays, which may lead to desmoltification. The low survival may seriously threat both the long‐term viability of wild populations of anadromous salmonids and the outcome of the intensive stocking programme in Denmark. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Ecology of Freshwater Fish 12 3 169 176 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract – The survival of brown trout and Atlantic salmon smolts during passage over small weirs was estimated in two small Danish rivers during the spring of 1998. Parallel groups of smolts were released upstream and downstream of the weirs and recaptured in traps further downstream. The results showed a smolt loss varying from 18 to 71% for trout and 53% for salmon. Furthermore, the surviving smolts from the upstream groups were delayed for up to 9 days compared to downstream groups. The study demonstrated that an increased proportion of total river discharge allocated to fish passage increased the smolt survival. Losses may be because of fish penetrating grids erected at fish farm inlets, predation and delays, which may lead to desmoltification. The low survival may seriously threat both the long‐term viability of wild populations of anadromous salmonids and the outcome of the intensive stocking programme in Denmark. |
format |
Article in Journal/Newspaper |
author |
Aarestrup, K. Koed, A. |
spellingShingle |
Aarestrup, K. Koed, A. Survival of migrating sea trout ( Salmo trutta) and Atlantic salmon ( Salmo salar) smolts negotiating weirs in small Danish rivers |
author_facet |
Aarestrup, K. Koed, A. |
author_sort |
Aarestrup, K. |
title |
Survival of migrating sea trout ( Salmo trutta) and Atlantic salmon ( Salmo salar) smolts negotiating weirs in small Danish rivers |
title_short |
Survival of migrating sea trout ( Salmo trutta) and Atlantic salmon ( Salmo salar) smolts negotiating weirs in small Danish rivers |
title_full |
Survival of migrating sea trout ( Salmo trutta) and Atlantic salmon ( Salmo salar) smolts negotiating weirs in small Danish rivers |
title_fullStr |
Survival of migrating sea trout ( Salmo trutta) and Atlantic salmon ( Salmo salar) smolts negotiating weirs in small Danish rivers |
title_full_unstemmed |
Survival of migrating sea trout ( Salmo trutta) and Atlantic salmon ( Salmo salar) smolts negotiating weirs in small Danish rivers |
title_sort |
survival of migrating sea trout ( salmo trutta) and atlantic salmon ( salmo salar) smolts negotiating weirs in small danish rivers |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1034/j.1600-0633.2003.00027.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1034%2Fj.1600-0633.2003.00027.x https://onlinelibrary.wiley.com/doi/pdf/10.1034/j.1600-0633.2003.00027.x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Ecology of Freshwater Fish volume 12, issue 3, page 169-176 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1034/j.1600-0633.2003.00027.x |
container_title |
Ecology of Freshwater Fish |
container_volume |
12 |
container_issue |
3 |
container_start_page |
169 |
op_container_end_page |
176 |
_version_ |
1810432245340569600 |