Effects of salmon on the diet and condition of stream-resident sculpins
Pacific salmon (Oncorhynchus spp.) can subsidize freshwater food webs with marine-derived nutrients from their eggs, juveniles, and carcasses. However, trophic interactions between spawning salmon and freshwater fish across natural gradients in salmon subsidies remain unclear. We tested how salmon a...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2014
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/cjfas-2013-0159 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2013-0159 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2013-0159 |
id |
crcansciencepubl:10.1139/cjfas-2013-0159 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/cjfas-2013-0159 2024-06-23T07:55:56+00:00 Effects of salmon on the diet and condition of stream-resident sculpins Swain, Noel R. Hocking, Morgan D. Harding, Jennifer N. Reynolds, John D. Richardson, John 2014 http://dx.doi.org/10.1139/cjfas-2013-0159 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2013-0159 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2013-0159 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 71, issue 4, page 521-532 ISSN 0706-652X 1205-7533 journal-article 2014 crcansciencepubl https://doi.org/10.1139/cjfas-2013-0159 2024-06-13T04:10:47Z Pacific salmon (Oncorhynchus spp.) can subsidize freshwater food webs with marine-derived nutrients from their eggs, juveniles, and carcasses. However, trophic interactions between spawning salmon and freshwater fish across natural gradients in salmon subsidies remain unclear. We tested how salmon affected the diets and condition of two dominant freshwater consumers — prickly and coastrange sculpins (Cottus asper and Cottus aleuticus, respectively) — across a wide gradient of pink salmon (Oncorhynchus gorbuscha) and chum salmon (Oncorhynchus keta) biomass from 33 streams in the Great Bear Rainforest of British Columbia, Canada. Sculpin diets shifted from invertebrates and juvenile salmonids to salmon eggs when salmon arrived in autumn, with salmon-derived nutrient contributions to diets and sculpin condition increasing with increasing biomass of spawning salmon among streams. Season, habitat, and individual sculpin body size and species also mediated the effects of salmon on sculpin diet as inferred from their carbon and nitrogen stable isotope signatures. This study shows the timing and pathways by which spawning salmon influence the diets and condition of freshwater consumers, and some of the individual and environmental factors that can regulate uptake of salmon nutrients in streams, thus informing ecosystem-based management. Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Canadian Science Publishing British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Canada Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Pacific Canadian Journal of Fisheries and Aquatic Sciences 71 4 521 532 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Pacific salmon (Oncorhynchus spp.) can subsidize freshwater food webs with marine-derived nutrients from their eggs, juveniles, and carcasses. However, trophic interactions between spawning salmon and freshwater fish across natural gradients in salmon subsidies remain unclear. We tested how salmon affected the diets and condition of two dominant freshwater consumers — prickly and coastrange sculpins (Cottus asper and Cottus aleuticus, respectively) — across a wide gradient of pink salmon (Oncorhynchus gorbuscha) and chum salmon (Oncorhynchus keta) biomass from 33 streams in the Great Bear Rainforest of British Columbia, Canada. Sculpin diets shifted from invertebrates and juvenile salmonids to salmon eggs when salmon arrived in autumn, with salmon-derived nutrient contributions to diets and sculpin condition increasing with increasing biomass of spawning salmon among streams. Season, habitat, and individual sculpin body size and species also mediated the effects of salmon on sculpin diet as inferred from their carbon and nitrogen stable isotope signatures. This study shows the timing and pathways by which spawning salmon influence the diets and condition of freshwater consumers, and some of the individual and environmental factors that can regulate uptake of salmon nutrients in streams, thus informing ecosystem-based management. |
author2 |
Richardson, John |
format |
Article in Journal/Newspaper |
author |
Swain, Noel R. Hocking, Morgan D. Harding, Jennifer N. Reynolds, John D. |
spellingShingle |
Swain, Noel R. Hocking, Morgan D. Harding, Jennifer N. Reynolds, John D. Effects of salmon on the diet and condition of stream-resident sculpins |
author_facet |
Swain, Noel R. Hocking, Morgan D. Harding, Jennifer N. Reynolds, John D. |
author_sort |
Swain, Noel R. |
title |
Effects of salmon on the diet and condition of stream-resident sculpins |
title_short |
Effects of salmon on the diet and condition of stream-resident sculpins |
title_full |
Effects of salmon on the diet and condition of stream-resident sculpins |
title_fullStr |
Effects of salmon on the diet and condition of stream-resident sculpins |
title_full_unstemmed |
Effects of salmon on the diet and condition of stream-resident sculpins |
title_sort |
effects of salmon on the diet and condition of stream-resident sculpins |
publisher |
Canadian Science Publishing |
publishDate |
2014 |
url |
http://dx.doi.org/10.1139/cjfas-2013-0159 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2013-0159 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2013-0159 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-19.455,-19.455,65.656,65.656) |
geographic |
British Columbia Canada Keta Pacific |
geographic_facet |
British Columbia Canada Keta Pacific |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 71, issue 4, page 521-532 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2013-0159 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
71 |
container_issue |
4 |
container_start_page |
521 |
op_container_end_page |
532 |
_version_ |
1802648746589159424 |