Fine-scale behavioural differences distinguish resource use by ecomorphs in a closed ecosystem
Temporal differences in habitat use and foraging specialisms between ecomorphs represent aspects of behavioural phenotype that are poorly understood with regard to the origin and maintenance of ecological diversity. We tested the role of behaviour in resource use divergence of two Arctic charr (Salv...
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Online Access: | http://hdl.handle.net/11250/2387313 https://doi.org/10.1038/srep24369 |
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ftninstnf:oai:brage.nina.no:11250/2387313 2024-06-23T07:48:55+00:00 Fine-scale behavioural differences distinguish resource use by ecomorphs in a closed ecosystem Hawley, Kate L. Rosten, Carolyn Christensen, Guttorm Lucas, Martyn C. 2016 application/pdf http://hdl.handle.net/11250/2387313 https://doi.org/10.1038/srep24369 eng eng Norges forskningsråd 227044 Scientific Reports 2016, 6 urn:issn:2045-2322 http://hdl.handle.net/11250/2387313 https://doi.org/10.1038/srep24369 cristin:1352004 Navngivelse-Ikkekommersiell 3.0 Norge http://creativecommons.org/licenses/by-nc/3.0/no/ 24369 6 Scientific Reports Journal article 2016 ftninstnf https://doi.org/10.1038/srep24369 2024-06-07T03:57:56Z Temporal differences in habitat use and foraging specialisms between ecomorphs represent aspects of behavioural phenotype that are poorly understood with regard to the origin and maintenance of ecological diversity. We tested the role of behaviour in resource use divergence of two Arctic charr (Salvelinus alpinus) phenotypes, a slim, putatively pelagic-dwelling morph and a robust, putatively littoral-dwelling generalist morph, over an annual cycle, using biotelemetry and stable isotopes. Pelagic morph charr exhibited significantly greater δC13 depletion, concordant with increased zooplanktivory, than for the Littoral morph. Although three-dimensional space-use of the morphs strongly overlapped, on average, the Littoral morph used that habitat 19.3% more than the Pelagic morph. Pelagic morph fish were significantly more active, further from the lake bed and at greater depth than Littoral fish (annual means respectively, Pelagic, 0.069BLs−1, 8.21 m and 14.11 m; Littoral, 0.047BLs−1, 5.87 m and 10.47 m). Patterns of habitat use differed between ecomorphs at key times, such as during autumn and at ice break, likely related to spawning and resumption of intensive foraging respectively. Extensive space-use overlap, but fine-scale differences in habitat use between charr ecomorphs, suggests the importance of competition for generating and maintaining polymorphism, and its potential for promoting reproductive isolation and evolution in sympatry. Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus Norwegian Institute for Nature Research: Brage NINA Arctic Scientific Reports 6 1 |
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Open Polar |
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Norwegian Institute for Nature Research: Brage NINA |
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ftninstnf |
language |
English |
description |
Temporal differences in habitat use and foraging specialisms between ecomorphs represent aspects of behavioural phenotype that are poorly understood with regard to the origin and maintenance of ecological diversity. We tested the role of behaviour in resource use divergence of two Arctic charr (Salvelinus alpinus) phenotypes, a slim, putatively pelagic-dwelling morph and a robust, putatively littoral-dwelling generalist morph, over an annual cycle, using biotelemetry and stable isotopes. Pelagic morph charr exhibited significantly greater δC13 depletion, concordant with increased zooplanktivory, than for the Littoral morph. Although three-dimensional space-use of the morphs strongly overlapped, on average, the Littoral morph used that habitat 19.3% more than the Pelagic morph. Pelagic morph fish were significantly more active, further from the lake bed and at greater depth than Littoral fish (annual means respectively, Pelagic, 0.069BLs−1, 8.21 m and 14.11 m; Littoral, 0.047BLs−1, 5.87 m and 10.47 m). Patterns of habitat use differed between ecomorphs at key times, such as during autumn and at ice break, likely related to spawning and resumption of intensive foraging respectively. Extensive space-use overlap, but fine-scale differences in habitat use between charr ecomorphs, suggests the importance of competition for generating and maintaining polymorphism, and its potential for promoting reproductive isolation and evolution in sympatry. |
format |
Article in Journal/Newspaper |
author |
Hawley, Kate L. Rosten, Carolyn Christensen, Guttorm Lucas, Martyn C. |
spellingShingle |
Hawley, Kate L. Rosten, Carolyn Christensen, Guttorm Lucas, Martyn C. Fine-scale behavioural differences distinguish resource use by ecomorphs in a closed ecosystem |
author_facet |
Hawley, Kate L. Rosten, Carolyn Christensen, Guttorm Lucas, Martyn C. |
author_sort |
Hawley, Kate L. |
title |
Fine-scale behavioural differences distinguish resource use by ecomorphs in a closed ecosystem |
title_short |
Fine-scale behavioural differences distinguish resource use by ecomorphs in a closed ecosystem |
title_full |
Fine-scale behavioural differences distinguish resource use by ecomorphs in a closed ecosystem |
title_fullStr |
Fine-scale behavioural differences distinguish resource use by ecomorphs in a closed ecosystem |
title_full_unstemmed |
Fine-scale behavioural differences distinguish resource use by ecomorphs in a closed ecosystem |
title_sort |
fine-scale behavioural differences distinguish resource use by ecomorphs in a closed ecosystem |
publishDate |
2016 |
url |
http://hdl.handle.net/11250/2387313 https://doi.org/10.1038/srep24369 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_source |
24369 6 Scientific Reports |
op_relation |
Norges forskningsråd 227044 Scientific Reports 2016, 6 urn:issn:2045-2322 http://hdl.handle.net/11250/2387313 https://doi.org/10.1038/srep24369 cristin:1352004 |
op_rights |
Navngivelse-Ikkekommersiell 3.0 Norge http://creativecommons.org/licenses/by-nc/3.0/no/ |
op_doi |
https://doi.org/10.1038/srep24369 |
container_title |
Scientific Reports |
container_volume |
6 |
container_issue |
1 |
_version_ |
1802639233411710976 |