Temporal stability of individual feeding specialization may promote speciation
Summary 1. Inter‐individual differences in trophic behaviour are considered important in the disruptive selection process for resource specialization and may represent an early phase in the evolution of polymorphism and adaptive radiation. Here, we provide evidence of high stability of individual tr...
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crwiley:10.1111/j.1365-2656.2009.01625.x 2024-06-02T08:00:06+00:00 Temporal stability of individual feeding specialization may promote speciation Knudsen, Rune Primicerio, Raul Amundsen, Per‐Arne Klemetsen, Anders 2009 http://dx.doi.org/10.1111/j.1365-2656.2009.01625.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2656.2009.01625.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2656.2009.01625.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Animal Ecology volume 79, issue 1, page 161-168 ISSN 0021-8790 1365-2656 journal-article 2009 crwiley https://doi.org/10.1111/j.1365-2656.2009.01625.x 2024-05-03T10:54:48Z Summary 1. Inter‐individual differences in trophic behaviour are considered important in the disruptive selection process for resource specialization and may represent an early phase in the evolution of polymorphism and adaptive radiation. Here, we provide evidence of high stability of individual trophic niches of a fish predator from a 15‐year study. 2. Individual resource specialization was investigated by combining data from analyses of stomach contents (recent trophic niche), trophically transmitted parasites (long‐term niche) and trophic morphology (niche adaptations) from single specimens of a postglacial fish (Arctic charr) population sampled from contrasting pelagic and littoral habitats. 3. Based on the relationships between morphology, parasites and diet, high inter‐individual temporal consistency of narrow niches (zooplanktivorous vs . benthivorous) was evident through the ontogeny of the charr, indicating low degree of switching both in habitat utilization and feeding strategy of individual fish. Co‐occurrence of differently specialized behavioural phenotypes was sustained over multiple generations. 4. The stable long‐term habitat and feeding specializations may represent an important initial step in an adaptive radiation process, and our findings suggest a case of sympatric speciation into two incipient forms diverging along the littoral–pelagic resource axis. Article in Journal/Newspaper Arctic charr Arctic Wiley Online Library Arctic Journal of Animal Ecology 79 1 161 168 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Summary 1. Inter‐individual differences in trophic behaviour are considered important in the disruptive selection process for resource specialization and may represent an early phase in the evolution of polymorphism and adaptive radiation. Here, we provide evidence of high stability of individual trophic niches of a fish predator from a 15‐year study. 2. Individual resource specialization was investigated by combining data from analyses of stomach contents (recent trophic niche), trophically transmitted parasites (long‐term niche) and trophic morphology (niche adaptations) from single specimens of a postglacial fish (Arctic charr) population sampled from contrasting pelagic and littoral habitats. 3. Based on the relationships between morphology, parasites and diet, high inter‐individual temporal consistency of narrow niches (zooplanktivorous vs . benthivorous) was evident through the ontogeny of the charr, indicating low degree of switching both in habitat utilization and feeding strategy of individual fish. Co‐occurrence of differently specialized behavioural phenotypes was sustained over multiple generations. 4. The stable long‐term habitat and feeding specializations may represent an important initial step in an adaptive radiation process, and our findings suggest a case of sympatric speciation into two incipient forms diverging along the littoral–pelagic resource axis. |
format |
Article in Journal/Newspaper |
author |
Knudsen, Rune Primicerio, Raul Amundsen, Per‐Arne Klemetsen, Anders |
spellingShingle |
Knudsen, Rune Primicerio, Raul Amundsen, Per‐Arne Klemetsen, Anders Temporal stability of individual feeding specialization may promote speciation |
author_facet |
Knudsen, Rune Primicerio, Raul Amundsen, Per‐Arne Klemetsen, Anders |
author_sort |
Knudsen, Rune |
title |
Temporal stability of individual feeding specialization may promote speciation |
title_short |
Temporal stability of individual feeding specialization may promote speciation |
title_full |
Temporal stability of individual feeding specialization may promote speciation |
title_fullStr |
Temporal stability of individual feeding specialization may promote speciation |
title_full_unstemmed |
Temporal stability of individual feeding specialization may promote speciation |
title_sort |
temporal stability of individual feeding specialization may promote speciation |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1111/j.1365-2656.2009.01625.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2656.2009.01625.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2656.2009.01625.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic |
genre_facet |
Arctic charr Arctic |
op_source |
Journal of Animal Ecology volume 79, issue 1, page 161-168 ISSN 0021-8790 1365-2656 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2656.2009.01625.x |
container_title |
Journal of Animal Ecology |
container_volume |
79 |
container_issue |
1 |
container_start_page |
161 |
op_container_end_page |
168 |
_version_ |
1800744114931630080 |