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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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1052.2765 2023-05-15T14:30:11+02:00 The utilization of a Pacific salmon Oncorhynchus nerka subsidy by three populations of charr Salvelinus spp K P Denton H B Rich Jr J W Moore T P Quinn The Pennsylvania State University CiteSeerX Archives 2010 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1052.2765 http://www.sfu.ca/biology/faculty/jwmoore/publications/Denton_etal_J_Fish_Biology_2010.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1052.2765 http://www.sfu.ca/biology/faculty/jwmoore/publications/Denton_etal_J_Fish_Biology_2010.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.sfu.ca/biology/faculty/jwmoore/publications/Denton_etal_J_Fish_Biology_2010.pdf text 2010 ftciteseerx 2020-04-12T00:15:57Z 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. Text Arctic charr Arctic Salvelinus alpinus Alaska Unknown Arctic Pacific Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) Varden ENVELOPE(7.656,7.656,62.534,62.534) |
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Open Polar |
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ftciteseerx |
language |
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. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
K P Denton H B Rich Jr J W Moore T P Quinn |
spellingShingle |
K P Denton H B Rich Jr J W Moore T P Quinn The utilization of a Pacific salmon Oncorhynchus nerka subsidy by three populations of charr Salvelinus spp |
author_facet |
K P Denton H B Rich Jr J W Moore T P Quinn |
author_sort |
K P Denton |
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 |
publishDate |
2010 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1052.2765 http://www.sfu.ca/biology/faculty/jwmoore/publications/Denton_etal_J_Fish_Biology_2010.pdf |
long_lat |
ENVELOPE(-130.143,-130.143,54.160,54.160) ENVELOPE(7.656,7.656,62.534,62.534) |
geographic |
Arctic Pacific Sockeye Varden |
geographic_facet |
Arctic Pacific Sockeye Varden |
genre |
Arctic charr Arctic Salvelinus alpinus Alaska |
genre_facet |
Arctic charr Arctic Salvelinus alpinus Alaska |
op_source |
http://www.sfu.ca/biology/faculty/jwmoore/publications/Denton_etal_J_Fish_Biology_2010.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1052.2765 http://www.sfu.ca/biology/faculty/jwmoore/publications/Denton_etal_J_Fish_Biology_2010.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766304080011984896 |