Consumption and distribution of salmon ( Oncorhynchus spp.) nutrients and energy by terrestrial flies
Anadromous Pacific salmon (Oncorhynchus spp.) subsidize terrestrial food webs with their nutrients and carcasses, a process driven largely by selective foraging by bears (Ursus spp.). We quantify wildlife transfer of salmon carcasses to riparian zones on two watersheds in coastal British Columbia an...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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2006
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Online Access: | http://dx.doi.org/10.1139/f06-110 http://www.nrcresearchpress.com/doi/pdf/10.1139/f06-110 |
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crcansciencepubl:10.1139/f06-110 2024-09-15T18:28:41+00:00 Consumption and distribution of salmon ( Oncorhynchus spp.) nutrients and energy by terrestrial flies Hocking, Morgan D Reimchen, Thomas E 2006 http://dx.doi.org/10.1139/f06-110 http://www.nrcresearchpress.com/doi/pdf/10.1139/f06-110 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 63, issue 9, page 2076-2086 ISSN 0706-652X 1205-7533 journal-article 2006 crcansciencepubl https://doi.org/10.1139/f06-110 2024-07-11T04:12:03Z Anadromous Pacific salmon (Oncorhynchus spp.) subsidize terrestrial food webs with their nutrients and carcasses, a process driven largely by selective foraging by bears (Ursus spp.). We quantify wildlife transfer of salmon carcasses to riparian zones on two watersheds in coastal British Columbia and estimate total terrestrial fly production from remnant carcasses. Large-bodied chum salmon (Oncorhynchus keta) were transferred into the forest at a greater rate than were pink salmon (Oncorhynchus gorbuscha) (chum salmon mass = 6089–11 031 kg, 16%–48% of salmon run; pink salmon mass = 2266–2808 kg, 4%–6% of salmon run). Blow flies (genus Calliphora) and other Diptera dominated colonization (>90% of salmon carcasses). Between the two watersheds, 196 and 265 g of Calliphora larvae per metre of spawning length (4 and 7 million larvae for whole watersheds) were generated from salmon carcass transfer. Stable isotope analysis of δ 15 N and δ 13 C of spring-emerging adult Calliphora revealed that >80% of individuals had salmon-based signatures. Flies are a dominant consumer and vector of salmon nutrients in terrestrial habitats and supplement the diet of at least 16 vertebrate and 22 invertebrate species. Anticipated further declines of salmon in the North Pacific can be expected to further erode the complex associations coupling marine and terrestrial ecosystems. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 63 9 2076 2086 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Anadromous Pacific salmon (Oncorhynchus spp.) subsidize terrestrial food webs with their nutrients and carcasses, a process driven largely by selective foraging by bears (Ursus spp.). We quantify wildlife transfer of salmon carcasses to riparian zones on two watersheds in coastal British Columbia and estimate total terrestrial fly production from remnant carcasses. Large-bodied chum salmon (Oncorhynchus keta) were transferred into the forest at a greater rate than were pink salmon (Oncorhynchus gorbuscha) (chum salmon mass = 6089–11 031 kg, 16%–48% of salmon run; pink salmon mass = 2266–2808 kg, 4%–6% of salmon run). Blow flies (genus Calliphora) and other Diptera dominated colonization (>90% of salmon carcasses). Between the two watersheds, 196 and 265 g of Calliphora larvae per metre of spawning length (4 and 7 million larvae for whole watersheds) were generated from salmon carcass transfer. Stable isotope analysis of δ 15 N and δ 13 C of spring-emerging adult Calliphora revealed that >80% of individuals had salmon-based signatures. Flies are a dominant consumer and vector of salmon nutrients in terrestrial habitats and supplement the diet of at least 16 vertebrate and 22 invertebrate species. Anticipated further declines of salmon in the North Pacific can be expected to further erode the complex associations coupling marine and terrestrial ecosystems. |
format |
Article in Journal/Newspaper |
author |
Hocking, Morgan D Reimchen, Thomas E |
spellingShingle |
Hocking, Morgan D Reimchen, Thomas E Consumption and distribution of salmon ( Oncorhynchus spp.) nutrients and energy by terrestrial flies |
author_facet |
Hocking, Morgan D Reimchen, Thomas E |
author_sort |
Hocking, Morgan D |
title |
Consumption and distribution of salmon ( Oncorhynchus spp.) nutrients and energy by terrestrial flies |
title_short |
Consumption and distribution of salmon ( Oncorhynchus spp.) nutrients and energy by terrestrial flies |
title_full |
Consumption and distribution of salmon ( Oncorhynchus spp.) nutrients and energy by terrestrial flies |
title_fullStr |
Consumption and distribution of salmon ( Oncorhynchus spp.) nutrients and energy by terrestrial flies |
title_full_unstemmed |
Consumption and distribution of salmon ( Oncorhynchus spp.) nutrients and energy by terrestrial flies |
title_sort |
consumption and distribution of salmon ( oncorhynchus spp.) nutrients and energy by terrestrial flies |
publisher |
Canadian Science Publishing |
publishDate |
2006 |
url |
http://dx.doi.org/10.1139/f06-110 http://www.nrcresearchpress.com/doi/pdf/10.1139/f06-110 |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 63, issue 9, page 2076-2086 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f06-110 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
63 |
container_issue |
9 |
container_start_page |
2076 |
op_container_end_page |
2086 |
_version_ |
1810470143994626048 |