Considerations for using spawner reference levels for managing single- and mixed-stock fisheries of Atlantic salmon
Abstract The probability of achieving the spawning requirement objective of Atlantic salmon (Salmo salar L.) is defined by the stochastic properties of small numbers and biological characteristics of the stock. The uncertainty in achieving the spawning escapement objective is greater for small stock...
Published in: | ICES Journal of Marine Science |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Oxford University Press (OUP)
2004
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1016/j.icesjms.2004.08.015 http://academic.oup.com/icesjms/article-pdf/61/8/1379/29122562/61-8-1379.pdf |
id |
croxfordunivpr:10.1016/j.icesjms.2004.08.015 |
---|---|
record_format |
openpolar |
spelling |
croxfordunivpr:10.1016/j.icesjms.2004.08.015 2024-02-11T10:02:07+01:00 Considerations for using spawner reference levels for managing single- and mixed-stock fisheries of Atlantic salmon Chaput, Gerald 2004 http://dx.doi.org/10.1016/j.icesjms.2004.08.015 http://academic.oup.com/icesjms/article-pdf/61/8/1379/29122562/61-8-1379.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 61, issue 8, page 1379-1388 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2004 croxfordunivpr https://doi.org/10.1016/j.icesjms.2004.08.015 2024-01-12T09:38:34Z Abstract The probability of achieving the spawning requirement objective of Atlantic salmon (Salmo salar L.) is defined by the stochastic properties of small numbers and biological characteristics of the stock. The uncertainty in achieving the spawning escapement objective is greater for small stocks than for large ones, such that measures of annual performance are more variable for small stocks. Summing individual river spawner requirements into a regional requirement reduces the probability of meeting the objectives simultaneously in all rivers. Variations in productivity among stocks, when not accounted for, can result in under-escapement in areas of lower productivity. The impact of mixed-stock fisheries can be most important for small stocks, and especially if these are of low relative productivity. Increasing the regional spawner requirement in an attempt to compensate for lower productivity may alleviate the problem somewhat, but it is not a guaranteed solution to the challenge of protecting all stocks, specifically those of low productivity in mixed-stock fishery situations. Each mixed-stock fishery situation can be evaluated on a case-by-case basis using Monte Carlo techniques. Article in Journal/Newspaper Atlantic salmon Salmo salar Oxford University Press ICES Journal of Marine Science 61 8 1379 1388 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Chaput, Gerald Considerations for using spawner reference levels for managing single- and mixed-stock fisheries of Atlantic salmon |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract The probability of achieving the spawning requirement objective of Atlantic salmon (Salmo salar L.) is defined by the stochastic properties of small numbers and biological characteristics of the stock. The uncertainty in achieving the spawning escapement objective is greater for small stocks than for large ones, such that measures of annual performance are more variable for small stocks. Summing individual river spawner requirements into a regional requirement reduces the probability of meeting the objectives simultaneously in all rivers. Variations in productivity among stocks, when not accounted for, can result in under-escapement in areas of lower productivity. The impact of mixed-stock fisheries can be most important for small stocks, and especially if these are of low relative productivity. Increasing the regional spawner requirement in an attempt to compensate for lower productivity may alleviate the problem somewhat, but it is not a guaranteed solution to the challenge of protecting all stocks, specifically those of low productivity in mixed-stock fishery situations. Each mixed-stock fishery situation can be evaluated on a case-by-case basis using Monte Carlo techniques. |
format |
Article in Journal/Newspaper |
author |
Chaput, Gerald |
author_facet |
Chaput, Gerald |
author_sort |
Chaput, Gerald |
title |
Considerations for using spawner reference levels for managing single- and mixed-stock fisheries of Atlantic salmon |
title_short |
Considerations for using spawner reference levels for managing single- and mixed-stock fisheries of Atlantic salmon |
title_full |
Considerations for using spawner reference levels for managing single- and mixed-stock fisheries of Atlantic salmon |
title_fullStr |
Considerations for using spawner reference levels for managing single- and mixed-stock fisheries of Atlantic salmon |
title_full_unstemmed |
Considerations for using spawner reference levels for managing single- and mixed-stock fisheries of Atlantic salmon |
title_sort |
considerations for using spawner reference levels for managing single- and mixed-stock fisheries of atlantic salmon |
publisher |
Oxford University Press (OUP) |
publishDate |
2004 |
url |
http://dx.doi.org/10.1016/j.icesjms.2004.08.015 http://academic.oup.com/icesjms/article-pdf/61/8/1379/29122562/61-8-1379.pdf |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
ICES Journal of Marine Science volume 61, issue 8, page 1379-1388 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1016/j.icesjms.2004.08.015 |
container_title |
ICES Journal of Marine Science |
container_volume |
61 |
container_issue |
8 |
container_start_page |
1379 |
op_container_end_page |
1388 |
_version_ |
1790598013971857408 |