The utilization of a Pacific salmon Oncorhynchus nerka subsidy by three populations of charr Salvelinus spp.
The L F ‐at‐age trajectories differentiated two populations of Dolly Varden charr Salvelinus malma and a population of Arctic charr Salvelinus alpinus from the eastern end of Iliamna Lake, Alaska. Salvelinus malma from the Pedro Bay ponds were the smallest for a given age, followed by Salvelinus alp...
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crwiley:10.1111/j.1095-8649.2010.02746.x 2024-09-15T17:52:25+00:00 The utilization of a Pacific salmon Oncorhynchus nerka subsidy by three populations of charr Salvelinus spp. Denton, K. P. Rich, H. B. Moore, J. W. Quinn, T. P. 2010 http://dx.doi.org/10.1111/j.1095-8649.2010.02746.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2010.02746.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2010.02746.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 77, issue 4, page 1006-1023 ISSN 0022-1112 1095-8649 journal-article 2010 crwiley https://doi.org/10.1111/j.1095-8649.2010.02746.x 2024-07-09T04:15:23Z The L F ‐at‐age trajectories differentiated two populations of Dolly Varden charr Salvelinus malma and a population of Arctic charr Salvelinus alpinus from the eastern end of Iliamna Lake, Alaska. Salvelinus malma from the Pedro Bay ponds were the smallest for a given age, followed by Salvelinus alpinus from the lake, and S. malma from the Iliamna River were much larger. The utilization of a large sockeye salmon Oncorhynchus nerka subsidy by the three Salvelinus spp. populations was then investigated by comparing diet data and mixing model (MixSIR) outputs based on carbon and nitrogen stable isotopes. Stomach contents indicated that both S. malma populations fed on O. nerka products, especially eggs and larval Diptera that had scavenged O. nerka carcasses, whereas S. alpinus fed on a variety of prey items such as three‐spined sticklebacks Gasterosteus aculeatus and snails. Stable‐isotope analysis corroborated the diet data; the two S. malma populations incorporated more O. nerka ‐derived nutrients into their tissues than did S. alpinus from the lake, although all populations showed substantial utilization of O. nerka ‐derived resources. Salvelinus alpinus also seemed to be much more omnivorous, as shown by stable‐isotope mixing models, than the S. malma populations. The dramatic differences in growth rate between the two S. malma populations, despite similar trophic patterns, indicate that other important genetic or environmental factors affect their life history, including proximate temperature controls and ultimate predation pressures. Article in Journal/Newspaper Arctic charr Salvelinus alpinus Alaska Wiley Online Library Journal of Fish Biology 77 4 1006 1023 |
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English |
description |
The L F ‐at‐age trajectories differentiated two populations of Dolly Varden charr Salvelinus malma and a population of Arctic charr Salvelinus alpinus from the eastern end of Iliamna Lake, Alaska. Salvelinus malma from the Pedro Bay ponds were the smallest for a given age, followed by Salvelinus alpinus from the lake, and S. malma from the Iliamna River were much larger. The utilization of a large sockeye salmon Oncorhynchus nerka subsidy by the three Salvelinus spp. populations was then investigated by comparing diet data and mixing model (MixSIR) outputs based on carbon and nitrogen stable isotopes. Stomach contents indicated that both S. malma populations fed on O. nerka products, especially eggs and larval Diptera that had scavenged O. nerka carcasses, whereas S. alpinus fed on a variety of prey items such as three‐spined sticklebacks Gasterosteus aculeatus and snails. Stable‐isotope analysis corroborated the diet data; the two S. malma populations incorporated more O. nerka ‐derived nutrients into their tissues than did S. alpinus from the lake, although all populations showed substantial utilization of O. nerka ‐derived resources. Salvelinus alpinus also seemed to be much more omnivorous, as shown by stable‐isotope mixing models, than the S. malma populations. The dramatic differences in growth rate between the two S. malma populations, despite similar trophic patterns, indicate that other important genetic or environmental factors affect their life history, including proximate temperature controls and ultimate predation pressures. |
format |
Article in Journal/Newspaper |
author |
Denton, K. P. Rich, H. B. Moore, J. W. Quinn, T. P. |
spellingShingle |
Denton, K. P. Rich, H. B. Moore, J. W. Quinn, T. P. The utilization of a Pacific salmon Oncorhynchus nerka subsidy by three populations of charr Salvelinus spp. |
author_facet |
Denton, K. P. Rich, H. B. Moore, J. W. Quinn, T. P. |
author_sort |
Denton, K. P. |
title |
The utilization of a Pacific salmon Oncorhynchus nerka subsidy by three populations of charr Salvelinus spp. |
title_short |
The utilization of a Pacific salmon Oncorhynchus nerka subsidy by three populations of charr Salvelinus spp. |
title_full |
The utilization of a Pacific salmon Oncorhynchus nerka subsidy by three populations of charr Salvelinus spp. |
title_fullStr |
The utilization of a Pacific salmon Oncorhynchus nerka subsidy by three populations of charr Salvelinus spp. |
title_full_unstemmed |
The utilization of a Pacific salmon Oncorhynchus nerka subsidy by three populations of charr Salvelinus spp. |
title_sort |
utilization of a pacific salmon oncorhynchus nerka subsidy by three populations of charr salvelinus spp. |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1111/j.1095-8649.2010.02746.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2010.02746.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2010.02746.x |
genre |
Arctic charr Salvelinus alpinus Alaska |
genre_facet |
Arctic charr Salvelinus alpinus Alaska |
op_source |
Journal of Fish Biology volume 77, issue 4, page 1006-1023 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.2010.02746.x |
container_title |
Journal of Fish Biology |
container_volume |
77 |
container_issue |
4 |
container_start_page |
1006 |
op_container_end_page |
1023 |
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1810294451564707840 |