Dynamic coastal pelagic habitat drives rapid changes in growth and condition of juvenile sockeye salmon (Oncorhynchus nerka) during early marine migration
Migrating marine taxa encounter diverse habitats that differ environmentally and in foraging conditions over a range of spatial scales. We examined body (RNA/DNA, length-weight residuals) and nutritional (fatty acid composition) condition of juvenile sockeye salmon (Oncorhynchus nerka) in British Co...
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| Format: | Article |
| Language: | English |
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Canadian Science Publishing
2022-01-01
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| Series: | FACETS |
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| Online Access: | https://facetsjournal.com/doi/10.1139/facets-2022-0068 |
| _version_ | 1798027968041189376 |
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| author | Jessica Garzke Ian Forster Sean C. Godwin Brett T. Johnson Martin Krkošek Natalie Mahara Evgeny A. Pakhomov Luke A. Rogers Brian P.V. Hunt |
| author_facet | Jessica Garzke Ian Forster Sean C. Godwin Brett T. Johnson Martin Krkošek Natalie Mahara Evgeny A. Pakhomov Luke A. Rogers Brian P.V. Hunt |
| author_sort | Jessica Garzke |
| collection | DOAJ |
| description | Migrating marine taxa encounter diverse habitats that differ environmentally and in foraging conditions over a range of spatial scales. We examined body (RNA/DNA, length-weight residuals) and nutritional (fatty acid composition) condition of juvenile sockeye salmon (Oncorhynchus nerka) in British Columbia, while migrating through oceanographically variable waters. Fish were sampled in the stratified northern Strait of Georgia (NSoG); the highly mixed Johnstone Strait (JS); and the transitional zone of Queen Charlotte Strait (QCS). In 2015, body and nutritional condition were high in the NSoG but rapidly declined to reach lowest levels in JS where prey availability was low, before showing signs of compensatory growth in QCS. In 2016, juvenile salmon had significantly lower condition in the NSoG than in 2015, although zooplankton biomass was similar, condition remained low in JS, and no compensatory growth was observed in QCS. We provide evidence that differences in juvenile salmon condition between the two years were due to changes in the food quality available to juvenile fish. We propose that existing hypotheses about fish survival need to be extended to incorporate food quality in addition to quantity to understand changes in fish condition and survival between years. |
| first_indexed | 2024-04-11T19:01:23Z |
| format | Article |
| id | doaj.art-005e316d1fe4442290343b0ad5b1a80b |
| institution | Directory Open Access Journal |
| issn | 2371-1671 |
| language | English |
| last_indexed | 2024-04-11T19:01:23Z |
| publishDate | 2022-01-01 |
| publisher | Canadian Science Publishing |
| record_format | Article |
| series | FACETS |
| spelling | doaj.art-005e316d1fe4442290343b0ad5b1a80b2022-12-22T04:08:01ZengCanadian Science PublishingFACETS2371-16712022-01-0171328134710.1139/facets-2022-0068Dynamic coastal pelagic habitat drives rapid changes in growth and condition of juvenile sockeye salmon (Oncorhynchus nerka) during early marine migrationJessica Garzke0Ian Forster1Sean C. Godwin2Brett T. Johnson3Martin Krkošek4Natalie Mahara5Evgeny A. Pakhomov6Luke A. Rogers7Brian P.V. Hunt8Institute for the Oceans and Fisheries, University of British Columbia, AERL, 2202 Main Mall, Vancouver, BC V6T 1Z4, CanadaPacific Science Enterprise Center, Fisheries and Oceans Canada, 4160 Marine Dr., West Vancouver BC V7V 1N6, CanadaDepartment of Biology, Dalhousie University, 1355 Oxford Street, Halifax, NS B3H 4R2, CanadaHakai Institute, PO Box 309, Heriot Bay, BC V0P 1H0, CanadaDepartment of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON M5S 3B2, CanadaInstitute for the Oceans and Fisheries, University of British Columbia, AERL, 2202 Main Mall, Vancouver, BC V6T 1Z4, CanadaInstitute for the Oceans and Fisheries, University of British Columbia, AERL, 2202 Main Mall, Vancouver, BC V6T 1Z4, CanadaPacific Biological Station, Fisheries and Oceans Canada, Nanaimo, BC V9T 6N7, CanadaInstitute for the Oceans and Fisheries, University of British Columbia, AERL, 2202 Main Mall, Vancouver, BC V6T 1Z4, CanadaMigrating marine taxa encounter diverse habitats that differ environmentally and in foraging conditions over a range of spatial scales. We examined body (RNA/DNA, length-weight residuals) and nutritional (fatty acid composition) condition of juvenile sockeye salmon (Oncorhynchus nerka) in British Columbia, while migrating through oceanographically variable waters. Fish were sampled in the stratified northern Strait of Georgia (NSoG); the highly mixed Johnstone Strait (JS); and the transitional zone of Queen Charlotte Strait (QCS). In 2015, body and nutritional condition were high in the NSoG but rapidly declined to reach lowest levels in JS where prey availability was low, before showing signs of compensatory growth in QCS. In 2016, juvenile salmon had significantly lower condition in the NSoG than in 2015, although zooplankton biomass was similar, condition remained low in JS, and no compensatory growth was observed in QCS. We provide evidence that differences in juvenile salmon condition between the two years were due to changes in the food quality available to juvenile fish. We propose that existing hypotheses about fish survival need to be extended to incorporate food quality in addition to quantity to understand changes in fish condition and survival between years.https://facetsjournal.com/doi/10.1139/facets-2022-0068fatty acidsRNA/DNAzooplankton biomassenvironmental variationcompensatory growthzooplankton species composition |
| spellingShingle | Jessica Garzke Ian Forster Sean C. Godwin Brett T. Johnson Martin Krkošek Natalie Mahara Evgeny A. Pakhomov Luke A. Rogers Brian P.V. Hunt Dynamic coastal pelagic habitat drives rapid changes in growth and condition of juvenile sockeye salmon (Oncorhynchus nerka) during early marine migration FACETS fatty acids RNA/DNA zooplankton biomass environmental variation compensatory growth zooplankton species composition |
| title | Dynamic coastal pelagic habitat drives rapid changes in growth and condition of juvenile sockeye salmon (Oncorhynchus nerka) during early marine migration |
| title_full | Dynamic coastal pelagic habitat drives rapid changes in growth and condition of juvenile sockeye salmon (Oncorhynchus nerka) during early marine migration |
| title_fullStr | Dynamic coastal pelagic habitat drives rapid changes in growth and condition of juvenile sockeye salmon (Oncorhynchus nerka) during early marine migration |
| title_full_unstemmed | Dynamic coastal pelagic habitat drives rapid changes in growth and condition of juvenile sockeye salmon (Oncorhynchus nerka) during early marine migration |
| title_short | Dynamic coastal pelagic habitat drives rapid changes in growth and condition of juvenile sockeye salmon (Oncorhynchus nerka) during early marine migration |
| title_sort | dynamic coastal pelagic habitat drives rapid changes in growth and condition of juvenile sockeye salmon oncorhynchus nerka during early marine migration |
| topic | fatty acids RNA/DNA zooplankton biomass environmental variation compensatory growth zooplankton species composition |
| url | https://facetsjournal.com/doi/10.1139/facets-2022-0068 |
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