Both predation and feeding opportunities may explain changes in survival of Baltic salmon post-smolts
Abstract Mäntyniemi, S., Romakkaniemi, A., Dannewitz, J., Palm, S., Pakarinen, T., Pulkkinen, H., Gårdmark, A., and Karlsson, O. 2012. Both predation and feeding opportunities may explain changes in survival of Baltic salmon post-smolts. – ICES Journal of Marine Science, 69: 1574–1579. The survival...
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croxfordunivpr:10.1093/icesjms/fss088 2024-10-06T13:52:28+00:00 Both predation and feeding opportunities may explain changes in survival of Baltic salmon post-smolts Mäntyniemi, Samu Romakkaniemi, Atso Dannewitz, Johan Palm, Stefan Pakarinen, Tapani Pulkkinen, Henni Gårdmark, Anna Karlsson, Olle 2012 http://dx.doi.org/10.1093/icesjms/fss088 http://academic.oup.com/icesjms/article-pdf/69/9/1574/29144137/fss088.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 69, issue 9, page 1574-1579 ISSN 1095-9289 1054-3139 journal-article 2012 croxfordunivpr https://doi.org/10.1093/icesjms/fss088 2024-09-10T04:14:10Z Abstract Mäntyniemi, S., Romakkaniemi, A., Dannewitz, J., Palm, S., Pakarinen, T., Pulkkinen, H., Gårdmark, A., and Karlsson, O. 2012. Both predation and feeding opportunities may explain changes in survival of Baltic salmon post-smolts. – ICES Journal of Marine Science, 69: 1574–1579. The survival of wild and hatchery-reared post-smolts of salmon (Salmo salar) in the Baltic Sea has declined since the 1990s. Direct observations of the processes affecting survival are, however, lacking. Here, the importance of food availability and predation in regulating post-smolt survival is analysed. Based on previous studies, the following explanatory variables were selected: (i) availability of herring (Clupea harengus membras) recruits in the Gulf of Bothnia (Bothnian Sea, Bothnian Bay) in the northern Baltic Sea; (ii) sprat (Sprattus sprattus balticus) and herring abundance in the southern Baltic Sea; and (iii) abundance of grey seal (Halichoerus grypus) along the post-smolt migration route. Bayesian analysis was used to estimate the relative probability of each of the 32 combinations of these variables and revealed that the model including grey seal abundance and herring recruits per post-smolt had the highest posterior probability and a high coefficient of determination. The results suggest that the declining trend in post-smolt survival is explained by the increased number of grey seals, whereas the annual variation in survival coincides with variation in the recruitment of Bothnian Sea herring. However, it remains uncertain whether the observed correlations arise from direct causalities or other mechanisms. Article in Journal/Newspaper Salmo salar Oxford University Press Mäntyniemi ENVELOPE(25.624,25.624,66.469,66.469) Romakkaniemi ENVELOPE(24.667,24.667,66.700,66.700) ICES Journal of Marine Science 69 9 1574 1579 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Mäntyniemi, S., Romakkaniemi, A., Dannewitz, J., Palm, S., Pakarinen, T., Pulkkinen, H., Gårdmark, A., and Karlsson, O. 2012. Both predation and feeding opportunities may explain changes in survival of Baltic salmon post-smolts. – ICES Journal of Marine Science, 69: 1574–1579. The survival of wild and hatchery-reared post-smolts of salmon (Salmo salar) in the Baltic Sea has declined since the 1990s. Direct observations of the processes affecting survival are, however, lacking. Here, the importance of food availability and predation in regulating post-smolt survival is analysed. Based on previous studies, the following explanatory variables were selected: (i) availability of herring (Clupea harengus membras) recruits in the Gulf of Bothnia (Bothnian Sea, Bothnian Bay) in the northern Baltic Sea; (ii) sprat (Sprattus sprattus balticus) and herring abundance in the southern Baltic Sea; and (iii) abundance of grey seal (Halichoerus grypus) along the post-smolt migration route. Bayesian analysis was used to estimate the relative probability of each of the 32 combinations of these variables and revealed that the model including grey seal abundance and herring recruits per post-smolt had the highest posterior probability and a high coefficient of determination. The results suggest that the declining trend in post-smolt survival is explained by the increased number of grey seals, whereas the annual variation in survival coincides with variation in the recruitment of Bothnian Sea herring. However, it remains uncertain whether the observed correlations arise from direct causalities or other mechanisms. |
format |
Article in Journal/Newspaper |
author |
Mäntyniemi, Samu Romakkaniemi, Atso Dannewitz, Johan Palm, Stefan Pakarinen, Tapani Pulkkinen, Henni Gårdmark, Anna Karlsson, Olle |
spellingShingle |
Mäntyniemi, Samu Romakkaniemi, Atso Dannewitz, Johan Palm, Stefan Pakarinen, Tapani Pulkkinen, Henni Gårdmark, Anna Karlsson, Olle Both predation and feeding opportunities may explain changes in survival of Baltic salmon post-smolts |
author_facet |
Mäntyniemi, Samu Romakkaniemi, Atso Dannewitz, Johan Palm, Stefan Pakarinen, Tapani Pulkkinen, Henni Gårdmark, Anna Karlsson, Olle |
author_sort |
Mäntyniemi, Samu |
title |
Both predation and feeding opportunities may explain changes in survival of Baltic salmon post-smolts |
title_short |
Both predation and feeding opportunities may explain changes in survival of Baltic salmon post-smolts |
title_full |
Both predation and feeding opportunities may explain changes in survival of Baltic salmon post-smolts |
title_fullStr |
Both predation and feeding opportunities may explain changes in survival of Baltic salmon post-smolts |
title_full_unstemmed |
Both predation and feeding opportunities may explain changes in survival of Baltic salmon post-smolts |
title_sort |
both predation and feeding opportunities may explain changes in survival of baltic salmon post-smolts |
publisher |
Oxford University Press (OUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1093/icesjms/fss088 http://academic.oup.com/icesjms/article-pdf/69/9/1574/29144137/fss088.pdf |
long_lat |
ENVELOPE(25.624,25.624,66.469,66.469) ENVELOPE(24.667,24.667,66.700,66.700) |
geographic |
Mäntyniemi Romakkaniemi |
geographic_facet |
Mäntyniemi Romakkaniemi |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_source |
ICES Journal of Marine Science volume 69, issue 9, page 1574-1579 ISSN 1095-9289 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fss088 |
container_title |
ICES Journal of Marine Science |
container_volume |
69 |
container_issue |
9 |
container_start_page |
1574 |
op_container_end_page |
1579 |
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1812180866996109312 |