Water temperatures influence the marine area use of Salvelinus alpinus and Salmo trutta
The migratory behaviour and spatial area use of sympatric Arctic charr Salvelinus alpinus and brown trout Salmo trutta were investigated during their marine feeding migration. The likelihood of finding individuals of both species in the inner or outer fjord areas was dependent on water temperature i...
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crwiley:10.1111/jfb.12366 2024-09-15T17:52:25+00:00 Water temperatures influence the marine area use of Salvelinus alpinus and Salmo trutta Jensen, J. L. A. Rikardsen, A. H. Thorstad, E. B. Suhr, A. H. Davidsen, J. G. Primicerio, R. Norwegian Directorate for Nature Management Norwegian Institute for Nature Research 2014 http://dx.doi.org/10.1111/jfb.12366 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.12366 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.12366 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 84, issue 6, page 1640-1653 ISSN 0022-1112 1095-8649 journal-article 2014 crwiley https://doi.org/10.1111/jfb.12366 2024-08-30T04:11:03Z The migratory behaviour and spatial area use of sympatric Arctic charr Salvelinus alpinus and brown trout Salmo trutta were investigated during their marine feeding migration. The likelihood of finding individuals of both species in the inner or outer fjord areas was dependent on water temperature in the inner area (especially for S. alpinus ), the temperature difference between the inner and outer areas (especially for S. trutta ) and fish fork length (both species). The strongest predictor was the water temperature in the inner area, and particularly S. alpinus left this area and moved to the outer areas with increasing temperatures in the inner area. At 8° C in the inner area, the likelihood of finding S. alpinus in the outer areas was >50%. This predictor had a smaller effect on S. trutta , and the likelihood of finding S. trutta in the outer areas only started to increase at around 14° C. The relationships between temperature and area use did not correspond to the species' optimal growth temperatures, but to their previously documented temperature preferences. Individuals of both species used mainly the littoral fjord areas, and to a lesser extent the pelagic areas. In conclusion, temperature differences between the inner and outer marine areas probably resulted in the segregated area use between the species, because water temperatures or factors influenced by temperature affected their migratory behaviour and habitat use differently. The results indicate that increased marine temperatures with global warming may lead to increased spatial overlap between S. trutta and S. alpinus , which again may lead to increased interspecific competition during their marine phase, and with S. alpinus probably being the more negatively affected. Article in Journal/Newspaper Arctic charr Global warming Salvelinus alpinus Wiley Online Library Journal of Fish Biology 84 6 1640 1653 |
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Wiley Online Library |
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crwiley |
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English |
description |
The migratory behaviour and spatial area use of sympatric Arctic charr Salvelinus alpinus and brown trout Salmo trutta were investigated during their marine feeding migration. The likelihood of finding individuals of both species in the inner or outer fjord areas was dependent on water temperature in the inner area (especially for S. alpinus ), the temperature difference between the inner and outer areas (especially for S. trutta ) and fish fork length (both species). The strongest predictor was the water temperature in the inner area, and particularly S. alpinus left this area and moved to the outer areas with increasing temperatures in the inner area. At 8° C in the inner area, the likelihood of finding S. alpinus in the outer areas was >50%. This predictor had a smaller effect on S. trutta , and the likelihood of finding S. trutta in the outer areas only started to increase at around 14° C. The relationships between temperature and area use did not correspond to the species' optimal growth temperatures, but to their previously documented temperature preferences. Individuals of both species used mainly the littoral fjord areas, and to a lesser extent the pelagic areas. In conclusion, temperature differences between the inner and outer marine areas probably resulted in the segregated area use between the species, because water temperatures or factors influenced by temperature affected their migratory behaviour and habitat use differently. The results indicate that increased marine temperatures with global warming may lead to increased spatial overlap between S. trutta and S. alpinus , which again may lead to increased interspecific competition during their marine phase, and with S. alpinus probably being the more negatively affected. |
author2 |
Norwegian Directorate for Nature Management Norwegian Institute for Nature Research |
format |
Article in Journal/Newspaper |
author |
Jensen, J. L. A. Rikardsen, A. H. Thorstad, E. B. Suhr, A. H. Davidsen, J. G. Primicerio, R. |
spellingShingle |
Jensen, J. L. A. Rikardsen, A. H. Thorstad, E. B. Suhr, A. H. Davidsen, J. G. Primicerio, R. Water temperatures influence the marine area use of Salvelinus alpinus and Salmo trutta |
author_facet |
Jensen, J. L. A. Rikardsen, A. H. Thorstad, E. B. Suhr, A. H. Davidsen, J. G. Primicerio, R. |
author_sort |
Jensen, J. L. A. |
title |
Water temperatures influence the marine area use of Salvelinus alpinus and Salmo trutta |
title_short |
Water temperatures influence the marine area use of Salvelinus alpinus and Salmo trutta |
title_full |
Water temperatures influence the marine area use of Salvelinus alpinus and Salmo trutta |
title_fullStr |
Water temperatures influence the marine area use of Salvelinus alpinus and Salmo trutta |
title_full_unstemmed |
Water temperatures influence the marine area use of Salvelinus alpinus and Salmo trutta |
title_sort |
water temperatures influence the marine area use of salvelinus alpinus and salmo trutta |
publisher |
Wiley |
publishDate |
2014 |
url |
http://dx.doi.org/10.1111/jfb.12366 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjfb.12366 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jfb.12366 |
genre |
Arctic charr Global warming Salvelinus alpinus |
genre_facet |
Arctic charr Global warming Salvelinus alpinus |
op_source |
Journal of Fish Biology volume 84, issue 6, page 1640-1653 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jfb.12366 |
container_title |
Journal of Fish Biology |
container_volume |
84 |
container_issue |
6 |
container_start_page |
1640 |
op_container_end_page |
1653 |
_version_ |
1810294453848506368 |