Relationship of upstream migrating adult Atlantic salmon ( Salmo salar) and stream discharge within Catamaran Brook, New Brunswick
Stream discharge has long been associated with abundance of returning adult spawning salmonids to streams and may also affect body size distribution of adult salmon as low flows interfere with returns of larger-bodied fish. We examined these relationships of abundance and body size within Catamaran...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
2007
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Online Access: | http://dx.doi.org/10.1139/f07-032 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-032 |
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crcansciencepubl:10.1139/f07-032 2024-09-15T17:55:57+00:00 Relationship of upstream migrating adult Atlantic salmon ( Salmo salar) and stream discharge within Catamaran Brook, New Brunswick Mitchell, Sean C Cunjak, Richard A 2007 http://dx.doi.org/10.1139/f07-032 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-032 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 3, page 563-573 ISSN 0706-652X 1205-7533 journal-article 2007 crcansciencepubl https://doi.org/10.1139/f07-032 2024-08-29T04:08:48Z Stream discharge has long been associated with abundance of returning adult spawning salmonids to streams and may also affect body size distribution of adult salmon as low flows interfere with returns of larger-bodied fish. We examined these relationships of abundance and body size within Catamaran Brook, a third-order tributary to the Miramichi River system of New Brunswick, Canada, to investigate the causes of a declining trend in annual returns of Atlantic salmon (Salmo salar) to this stream. Regression models of adult abundance, proportion of the run as grilse, and body size of returning adults as functions of maximum daily stream discharge during the period of upstream spawner migration were constructed. Adult abundance shows a logarithmic relationship with stream discharge and provides good predictive ability, while appearing to not be significantly related to adult abundance in the larger Miramichi system. The proportion as grilse in the run and female body size are also logarithmically related to stream discharge, with low flow years being very influential in the regressions. These relationships of Atlantic salmon population abundance and body size characteristics have implications with respect to stock integrity and production of the following generation. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 64 3 563 573 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Stream discharge has long been associated with abundance of returning adult spawning salmonids to streams and may also affect body size distribution of adult salmon as low flows interfere with returns of larger-bodied fish. We examined these relationships of abundance and body size within Catamaran Brook, a third-order tributary to the Miramichi River system of New Brunswick, Canada, to investigate the causes of a declining trend in annual returns of Atlantic salmon (Salmo salar) to this stream. Regression models of adult abundance, proportion of the run as grilse, and body size of returning adults as functions of maximum daily stream discharge during the period of upstream spawner migration were constructed. Adult abundance shows a logarithmic relationship with stream discharge and provides good predictive ability, while appearing to not be significantly related to adult abundance in the larger Miramichi system. The proportion as grilse in the run and female body size are also logarithmically related to stream discharge, with low flow years being very influential in the regressions. These relationships of Atlantic salmon population abundance and body size characteristics have implications with respect to stock integrity and production of the following generation. |
format |
Article in Journal/Newspaper |
author |
Mitchell, Sean C Cunjak, Richard A |
spellingShingle |
Mitchell, Sean C Cunjak, Richard A Relationship of upstream migrating adult Atlantic salmon ( Salmo salar) and stream discharge within Catamaran Brook, New Brunswick |
author_facet |
Mitchell, Sean C Cunjak, Richard A |
author_sort |
Mitchell, Sean C |
title |
Relationship of upstream migrating adult Atlantic salmon ( Salmo salar) and stream discharge within Catamaran Brook, New Brunswick |
title_short |
Relationship of upstream migrating adult Atlantic salmon ( Salmo salar) and stream discharge within Catamaran Brook, New Brunswick |
title_full |
Relationship of upstream migrating adult Atlantic salmon ( Salmo salar) and stream discharge within Catamaran Brook, New Brunswick |
title_fullStr |
Relationship of upstream migrating adult Atlantic salmon ( Salmo salar) and stream discharge within Catamaran Brook, New Brunswick |
title_full_unstemmed |
Relationship of upstream migrating adult Atlantic salmon ( Salmo salar) and stream discharge within Catamaran Brook, New Brunswick |
title_sort |
relationship of upstream migrating adult atlantic salmon ( salmo salar) and stream discharge within catamaran brook, new brunswick |
publisher |
Canadian Science Publishing |
publishDate |
2007 |
url |
http://dx.doi.org/10.1139/f07-032 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-032 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 3, page 563-573 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f07-032 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
64 |
container_issue |
3 |
container_start_page |
563 |
op_container_end_page |
573 |
_version_ |
1810432170357948416 |