Repeatable individual variation in migration timing in two anadromous salmonids and ecological consequences
Abstract Consistent individual differences in behavior have been demonstrated for many animals, but there are few studies of consequences of such repeated behavior in the wild. We tested consistency in migration timing to and from the sea among anadromous Arctic char (Salvelinus alpinus) and brown t...
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ftdoajarticles:oai:doaj.org/article:022e2302899b44b5b4b19ddf542badd7 2023-05-15T14:54:50+02:00 Repeatable individual variation in migration timing in two anadromous salmonids and ecological consequences Arne Johan Jensen Bengt Finstad Peder Fiske Ola H. Diserud Eva B. Thorstad 2020-10-01T00:00:00Z https://doi.org/10.1002/ece3.6808 https://doaj.org/article/022e2302899b44b5b4b19ddf542badd7 EN eng Wiley https://doi.org/10.1002/ece3.6808 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.6808 https://doaj.org/article/022e2302899b44b5b4b19ddf542badd7 Ecology and Evolution, Vol 10, Iss 20, Pp 11727-11738 (2020) anadromous behavior individual variation migration repeatability Salmo Ecology QH540-549.5 article 2020 ftdoajarticles https://doi.org/10.1002/ece3.6808 2022-12-31T16:30:47Z Abstract Consistent individual differences in behavior have been demonstrated for many animals, but there are few studies of consequences of such repeated behavior in the wild. We tested consistency in migration timing to and from the sea among anadromous Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta), using data from a study period of about 25 years, including more than 27,000 uniquely Carlin‐tagged individuals that migrated to sea for feeding in the spring and returned to the river in late summer for up to 13 successive years. Consistency was found between individuals across time in timing of the seaward migration. Individuals migrating early during their first migration tended to migrate early the following years, and late migrants tended to migrate late. The same pattern was found also at ascent to freshwater. Hence, this study demonstrated that individual fish in nature can differ in behavior related to migration timing and that these differences can be consistent during their lifetime. Early migrants increased their mass more than late migrants and had a higher specific growth rate. Early migrating Arctic char, but not brown trout, experienced a longer life after the first migration to sea than late migrants. In both species, maturity occurred earlier in individuals that migrated early. For brown trout, but not for Arctic char, fecundity was significantly correlated to the timing of smolt migration. Hence, the repeatable individual variation in migration timing seemed to have ecological and fitness consequences in terms of growth, longevity, timing of maturity, and lifetime fecundity. Article in Journal/Newspaper Arctic Salvelinus alpinus Directory of Open Access Journals: DOAJ Articles Arctic Ecology and Evolution 10 20 11727 11738 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
anadromous behavior individual variation migration repeatability Salmo Ecology QH540-549.5 |
spellingShingle |
anadromous behavior individual variation migration repeatability Salmo Ecology QH540-549.5 Arne Johan Jensen Bengt Finstad Peder Fiske Ola H. Diserud Eva B. Thorstad Repeatable individual variation in migration timing in two anadromous salmonids and ecological consequences |
topic_facet |
anadromous behavior individual variation migration repeatability Salmo Ecology QH540-549.5 |
description |
Abstract Consistent individual differences in behavior have been demonstrated for many animals, but there are few studies of consequences of such repeated behavior in the wild. We tested consistency in migration timing to and from the sea among anadromous Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta), using data from a study period of about 25 years, including more than 27,000 uniquely Carlin‐tagged individuals that migrated to sea for feeding in the spring and returned to the river in late summer for up to 13 successive years. Consistency was found between individuals across time in timing of the seaward migration. Individuals migrating early during their first migration tended to migrate early the following years, and late migrants tended to migrate late. The same pattern was found also at ascent to freshwater. Hence, this study demonstrated that individual fish in nature can differ in behavior related to migration timing and that these differences can be consistent during their lifetime. Early migrants increased their mass more than late migrants and had a higher specific growth rate. Early migrating Arctic char, but not brown trout, experienced a longer life after the first migration to sea than late migrants. In both species, maturity occurred earlier in individuals that migrated early. For brown trout, but not for Arctic char, fecundity was significantly correlated to the timing of smolt migration. Hence, the repeatable individual variation in migration timing seemed to have ecological and fitness consequences in terms of growth, longevity, timing of maturity, and lifetime fecundity. |
format |
Article in Journal/Newspaper |
author |
Arne Johan Jensen Bengt Finstad Peder Fiske Ola H. Diserud Eva B. Thorstad |
author_facet |
Arne Johan Jensen Bengt Finstad Peder Fiske Ola H. Diserud Eva B. Thorstad |
author_sort |
Arne Johan Jensen |
title |
Repeatable individual variation in migration timing in two anadromous salmonids and ecological consequences |
title_short |
Repeatable individual variation in migration timing in two anadromous salmonids and ecological consequences |
title_full |
Repeatable individual variation in migration timing in two anadromous salmonids and ecological consequences |
title_fullStr |
Repeatable individual variation in migration timing in two anadromous salmonids and ecological consequences |
title_full_unstemmed |
Repeatable individual variation in migration timing in two anadromous salmonids and ecological consequences |
title_sort |
repeatable individual variation in migration timing in two anadromous salmonids and ecological consequences |
publisher |
Wiley |
publishDate |
2020 |
url |
https://doi.org/10.1002/ece3.6808 https://doaj.org/article/022e2302899b44b5b4b19ddf542badd7 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Salvelinus alpinus |
genre_facet |
Arctic Salvelinus alpinus |
op_source |
Ecology and Evolution, Vol 10, Iss 20, Pp 11727-11738 (2020) |
op_relation |
https://doi.org/10.1002/ece3.6808 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.6808 https://doaj.org/article/022e2302899b44b5b4b19ddf542badd7 |
op_doi |
https://doi.org/10.1002/ece3.6808 |
container_title |
Ecology and Evolution |
container_volume |
10 |
container_issue |
20 |
container_start_page |
11727 |
op_container_end_page |
11738 |
_version_ |
1766326586090455040 |