Is juvenile salmon abundance related to subsequent and preceding catches? Perspectives from a long-term monitoring programme
Abstract The abundance of wild Atlantic salmon in the River Teno system has been monitored since the 1970s by estimating salmon catches and juvenile salmon densities at permanent electrofishing sites. Analysis of the time-series has shown significant relationships between juvenile densities (0+ and...
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Language: | English |
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Oxford University Press (OUP)
2005
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Online Access: | http://dx.doi.org/10.1016/j.icesjms.2005.07.002 http://academic.oup.com/icesjms/article-pdf/62/8/1617/29124172/62-8-1617.pdf |
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croxfordunivpr:10.1016/j.icesjms.2005.07.002 2024-05-19T07:37:47+00:00 Is juvenile salmon abundance related to subsequent and preceding catches? Perspectives from a long-term monitoring programme Niemelä, E. Erkinaro, J. Julkunen, M. Hassinen, E. 2005 http://dx.doi.org/10.1016/j.icesjms.2005.07.002 http://academic.oup.com/icesjms/article-pdf/62/8/1617/29124172/62-8-1617.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 62, issue 8, page 1617-1629 ISSN 1095-9289 1054-3139 journal-article 2005 croxfordunivpr https://doi.org/10.1016/j.icesjms.2005.07.002 2024-05-02T09:31:57Z Abstract The abundance of wild Atlantic salmon in the River Teno system has been monitored since the 1970s by estimating salmon catches and juvenile salmon densities at permanent electrofishing sites. Analysis of the time-series has shown significant relationships between juvenile densities (0+ and 1+) and subsequent 1SW and 2SW catches. Corresponding significant relationships have been detected between 1SW and 2SW female salmon in the catches and subsequent fry and parr densities. Monitoring juvenile densities allows evaluation of spawning escapement 1 and 2 years earlier, confirming the stock status information provided by catch statistics. These relationships between juvenile abundance and catches suggest that the monitoring programme has included feasible and biologically relevant variables and proper methodologies. Increasing trends were detected in the numbers of 1SW and 2SW salmon in catches between 1977 and 2003. Similarly, fry abundance indicated long-term increasing trends at most sites. Significant relationships were detected between abundances of subsequent sea-age groups in catches (1SW vs. 2SW 1 year later, etc.), indicating that strong smolt year classes influence the abundance of several subsequent sea-age groups, and that such relationships permit forecasting future catches of multi-sea-winter salmon by 1SW salmon catches. Article in Journal/Newspaper Atlantic salmon Oxford University Press ICES Journal of Marine Science 62 8 1617 1629 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
Abstract The abundance of wild Atlantic salmon in the River Teno system has been monitored since the 1970s by estimating salmon catches and juvenile salmon densities at permanent electrofishing sites. Analysis of the time-series has shown significant relationships between juvenile densities (0+ and 1+) and subsequent 1SW and 2SW catches. Corresponding significant relationships have been detected between 1SW and 2SW female salmon in the catches and subsequent fry and parr densities. Monitoring juvenile densities allows evaluation of spawning escapement 1 and 2 years earlier, confirming the stock status information provided by catch statistics. These relationships between juvenile abundance and catches suggest that the monitoring programme has included feasible and biologically relevant variables and proper methodologies. Increasing trends were detected in the numbers of 1SW and 2SW salmon in catches between 1977 and 2003. Similarly, fry abundance indicated long-term increasing trends at most sites. Significant relationships were detected between abundances of subsequent sea-age groups in catches (1SW vs. 2SW 1 year later, etc.), indicating that strong smolt year classes influence the abundance of several subsequent sea-age groups, and that such relationships permit forecasting future catches of multi-sea-winter salmon by 1SW salmon catches. |
format |
Article in Journal/Newspaper |
author |
Niemelä, E. Erkinaro, J. Julkunen, M. Hassinen, E. |
spellingShingle |
Niemelä, E. Erkinaro, J. Julkunen, M. Hassinen, E. Is juvenile salmon abundance related to subsequent and preceding catches? Perspectives from a long-term monitoring programme |
author_facet |
Niemelä, E. Erkinaro, J. Julkunen, M. Hassinen, E. |
author_sort |
Niemelä, E. |
title |
Is juvenile salmon abundance related to subsequent and preceding catches? Perspectives from a long-term monitoring programme |
title_short |
Is juvenile salmon abundance related to subsequent and preceding catches? Perspectives from a long-term monitoring programme |
title_full |
Is juvenile salmon abundance related to subsequent and preceding catches? Perspectives from a long-term monitoring programme |
title_fullStr |
Is juvenile salmon abundance related to subsequent and preceding catches? Perspectives from a long-term monitoring programme |
title_full_unstemmed |
Is juvenile salmon abundance related to subsequent and preceding catches? Perspectives from a long-term monitoring programme |
title_sort |
is juvenile salmon abundance related to subsequent and preceding catches? perspectives from a long-term monitoring programme |
publisher |
Oxford University Press (OUP) |
publishDate |
2005 |
url |
http://dx.doi.org/10.1016/j.icesjms.2005.07.002 http://academic.oup.com/icesjms/article-pdf/62/8/1617/29124172/62-8-1617.pdf |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
ICES Journal of Marine Science volume 62, issue 8, page 1617-1629 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1016/j.icesjms.2005.07.002 |
container_title |
ICES Journal of Marine Science |
container_volume |
62 |
container_issue |
8 |
container_start_page |
1617 |
op_container_end_page |
1629 |
_version_ |
1799477155298541568 |