Early social status and the development of life-history strategies in Atlantic salmon
Atlantic salmon have a variable life cycle. In good growing conditions, underyearling fish may metamorphose into the migratory smolt phase during their second spring, or delay at least a further year. The strategy adopted by particular fish appears to become fixed during their first summer. This pap...
Published in: | Proceedings of the Royal Society of London. B. Biological Sciences |
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1989
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Online Access: | http://dx.doi.org/10.1098/rspb.1989.0009 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.1989.0009 |
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crroyalsociety:10.1098/rspb.1989.0009 2024-09-09T19:30:29+00:00 Early social status and the development of life-history strategies in Atlantic salmon 1989 http://dx.doi.org/10.1098/rspb.1989.0009 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.1989.0009 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Proceedings of the Royal Society of London. B. Biological Sciences volume 236, issue 1282, page 7-19 ISSN 0080-4649 journal-article 1989 crroyalsociety https://doi.org/10.1098/rspb.1989.0009 2024-08-12T04:27:37Z Atlantic salmon have a variable life cycle. In good growing conditions, underyearling fish may metamorphose into the migratory smolt phase during their second spring, or delay at least a further year. The strategy adopted by particular fish appears to become fixed during their first summer. This paper examines whether either feeding efficiency or dominance in mid-summer correlates with the life-history strategy adopted. Eighty fish were individually marked and their feeding efficiency ( = mean handling time for food items) and dominance rank measured under laboratory conditions in mid-July. Growth rates of the fish were then monitored over the next three months, until developmental strategies became apparent. Discriminant and logistic regression analyses revealed that both dominance rank and size attained by July were independent, significant predictors of future developmental pattern (the age at metamorphosis being correctly predicted on the basis of rank and size in 84% of cases) whereas feeding efficiency had no effect. Thus fish that were dominant or larger two months after first feeding or both had a greater probability of migrating after only one year in freshwater than those more subordinate or smaller or both. Article in Journal/Newspaper Atlantic salmon The Royal Society Proceedings of the Royal Society of London. B. Biological Sciences 236 1282 7 19 |
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Open Polar |
collection |
The Royal Society |
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crroyalsociety |
language |
English |
description |
Atlantic salmon have a variable life cycle. In good growing conditions, underyearling fish may metamorphose into the migratory smolt phase during their second spring, or delay at least a further year. The strategy adopted by particular fish appears to become fixed during their first summer. This paper examines whether either feeding efficiency or dominance in mid-summer correlates with the life-history strategy adopted. Eighty fish were individually marked and their feeding efficiency ( = mean handling time for food items) and dominance rank measured under laboratory conditions in mid-July. Growth rates of the fish were then monitored over the next three months, until developmental strategies became apparent. Discriminant and logistic regression analyses revealed that both dominance rank and size attained by July were independent, significant predictors of future developmental pattern (the age at metamorphosis being correctly predicted on the basis of rank and size in 84% of cases) whereas feeding efficiency had no effect. Thus fish that were dominant or larger two months after first feeding or both had a greater probability of migrating after only one year in freshwater than those more subordinate or smaller or both. |
format |
Article in Journal/Newspaper |
title |
Early social status and the development of life-history strategies in Atlantic salmon |
spellingShingle |
Early social status and the development of life-history strategies in Atlantic salmon |
title_short |
Early social status and the development of life-history strategies in Atlantic salmon |
title_full |
Early social status and the development of life-history strategies in Atlantic salmon |
title_fullStr |
Early social status and the development of life-history strategies in Atlantic salmon |
title_full_unstemmed |
Early social status and the development of life-history strategies in Atlantic salmon |
title_sort |
early social status and the development of life-history strategies in atlantic salmon |
publisher |
The Royal Society |
publishDate |
1989 |
url |
http://dx.doi.org/10.1098/rspb.1989.0009 https://royalsocietypublishing.org/doi/pdf/10.1098/rspb.1989.0009 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_source |
Proceedings of the Royal Society of London. B. Biological Sciences volume 236, issue 1282, page 7-19 ISSN 0080-4649 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rspb.1989.0009 |
container_title |
Proceedings of the Royal Society of London. B. Biological Sciences |
container_volume |
236 |
container_issue |
1282 |
container_start_page |
7 |
op_container_end_page |
19 |
_version_ |
1809899463853998080 |