Contrasting Early Marine Ecology of Chinook Salmon and Coho Salmon in Southeast Alaska: Insight into Factors Affecting Marine Survival
To identify processes potentially contributing to the differential marine survival rates of Chinook salmon Oncorhynchus tshawytscha and coho salmon O. kisutch originating from Southeast Alaska, we compared the early marine ecology of the two species during the critical first summer in marine waters....
Published in: | Marine and Coastal Fisheries |
---|---|
Main Author: | |
Format: | Text |
Language: | English |
Published: |
American Fisheries Society
2011
|
Subjects: | |
Online Access: | https://doi.org/10.1080/19425120.2011.588919 |
id |
ftbioone:10.1080/19425120.2011.588919 |
---|---|
record_format |
openpolar |
spelling |
ftbioone:10.1080/19425120.2011.588919 2024-06-02T08:13:18+00:00 Contrasting Early Marine Ecology of Chinook Salmon and Coho Salmon in Southeast Alaska: Insight into Factors Affecting Marine Survival L. A. Weitkamp L. A. Weitkamp world 2011-01-01 text/HTML https://doi.org/10.1080/19425120.2011.588919 en eng American Fisheries Society doi:10.1080/19425120.2011.588919 All rights reserved. https://doi.org/10.1080/19425120.2011.588919 Text 2011 ftbioone https://doi.org/10.1080/19425120.2011.588919 2024-05-07T00:51:43Z To identify processes potentially contributing to the differential marine survival rates of Chinook salmon Oncorhynchus tshawytscha and coho salmon O. kisutch originating from Southeast Alaska, we compared the early marine ecology of the two species during the critical first summer in marine waters. We predicted that the higher survival rates for coho salmon relative to Chinook salmon were related to the larger size, faster growth, or different habitat or species associations of coho salmon. Our size and growth expectations were largely substantiated: juvenile coho salmon were larger than juvenile Chinook salmon and had faster length-based growth, although weight-based growth rates were similar. The most obvious difference was in their distributions. Juvenile coho salmon overlapped spatially and temporally with abundant juvenile pink salmon O. gorbuscha and chum salmon O. keta, whereas juvenile Chinook salmon were geographically separated from other salmonids. This suggests that coho salmon benefited from a predation buffer that did not extend to Chinook salmon. Our results indicate that factors influencing marine survival of juvenile Chinook salmon and coho salmon in Southeast Alaska are attributable to species-specific differences in their early marine distribution patterns and species interactions. Text Pink salmon Alaska BioOne Online Journals Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Marine and Coastal Fisheries 3 1 233 249 |
institution |
Open Polar |
collection |
BioOne Online Journals |
op_collection_id |
ftbioone |
language |
English |
description |
To identify processes potentially contributing to the differential marine survival rates of Chinook salmon Oncorhynchus tshawytscha and coho salmon O. kisutch originating from Southeast Alaska, we compared the early marine ecology of the two species during the critical first summer in marine waters. We predicted that the higher survival rates for coho salmon relative to Chinook salmon were related to the larger size, faster growth, or different habitat or species associations of coho salmon. Our size and growth expectations were largely substantiated: juvenile coho salmon were larger than juvenile Chinook salmon and had faster length-based growth, although weight-based growth rates were similar. The most obvious difference was in their distributions. Juvenile coho salmon overlapped spatially and temporally with abundant juvenile pink salmon O. gorbuscha and chum salmon O. keta, whereas juvenile Chinook salmon were geographically separated from other salmonids. This suggests that coho salmon benefited from a predation buffer that did not extend to Chinook salmon. Our results indicate that factors influencing marine survival of juvenile Chinook salmon and coho salmon in Southeast Alaska are attributable to species-specific differences in their early marine distribution patterns and species interactions. |
author2 |
L. A. Weitkamp |
format |
Text |
author |
L. A. Weitkamp |
spellingShingle |
L. A. Weitkamp Contrasting Early Marine Ecology of Chinook Salmon and Coho Salmon in Southeast Alaska: Insight into Factors Affecting Marine Survival |
author_facet |
L. A. Weitkamp |
author_sort |
L. A. Weitkamp |
title |
Contrasting Early Marine Ecology of Chinook Salmon and Coho Salmon in Southeast Alaska: Insight into Factors Affecting Marine Survival |
title_short |
Contrasting Early Marine Ecology of Chinook Salmon and Coho Salmon in Southeast Alaska: Insight into Factors Affecting Marine Survival |
title_full |
Contrasting Early Marine Ecology of Chinook Salmon and Coho Salmon in Southeast Alaska: Insight into Factors Affecting Marine Survival |
title_fullStr |
Contrasting Early Marine Ecology of Chinook Salmon and Coho Salmon in Southeast Alaska: Insight into Factors Affecting Marine Survival |
title_full_unstemmed |
Contrasting Early Marine Ecology of Chinook Salmon and Coho Salmon in Southeast Alaska: Insight into Factors Affecting Marine Survival |
title_sort |
contrasting early marine ecology of chinook salmon and coho salmon in southeast alaska: insight into factors affecting marine survival |
publisher |
American Fisheries Society |
publishDate |
2011 |
url |
https://doi.org/10.1080/19425120.2011.588919 |
op_coverage |
world |
long_lat |
ENVELOPE(-19.455,-19.455,65.656,65.656) |
geographic |
Keta |
geographic_facet |
Keta |
genre |
Pink salmon Alaska |
genre_facet |
Pink salmon Alaska |
op_source |
https://doi.org/10.1080/19425120.2011.588919 |
op_relation |
doi:10.1080/19425120.2011.588919 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1080/19425120.2011.588919 |
container_title |
Marine and Coastal Fisheries |
container_volume |
3 |
container_issue |
1 |
container_start_page |
233 |
op_container_end_page |
249 |
_version_ |
1800736751916941312 |