Stomach Contents of Salmon and Steelhead Trout in the Northeastern Pacific Ocean
Stomachs of pink, chum, sockeye, and coho salmon and steelhead trout caught during the summer of 1958 in gillnets fished overnight in the northeastern Pacific Ocean contained mainly zooplankton (Limacina, amphipods, copepods, and euphausiids), squid, and fish. Except for sockeye, there were no diffe...
Published in: | Journal of the Fisheries Research Board of Canada |
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Language: | English |
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Canadian Science Publishing
1966
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Online Access: | http://dx.doi.org/10.1139/f66-007 http://www.nrcresearchpress.com/doi/pdf/10.1139/f66-007 |
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crcansciencepubl:10.1139/f66-007 2023-12-17T10:48:48+01:00 Stomach Contents of Salmon and Steelhead Trout in the Northeastern Pacific Ocean LeBrasseur, R. J. 1966 http://dx.doi.org/10.1139/f66-007 http://www.nrcresearchpress.com/doi/pdf/10.1139/f66-007 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Journal of the Fisheries Research Board of Canada volume 23, issue 1, page 85-100 ISSN 0015-296X General Medicine journal-article 1966 crcansciencepubl https://doi.org/10.1139/f66-007 2023-11-19T13:38:51Z Stomachs of pink, chum, sockeye, and coho salmon and steelhead trout caught during the summer of 1958 in gillnets fished overnight in the northeastern Pacific Ocean contained mainly zooplankton (Limacina, amphipods, copepods, and euphausiids), squid, and fish. Except for sockeye, there were no differences in contents related to fish size or state of maturity. Differences were found between species in the kinds of stomach contents present. The predominant organisms were amphipods and fish in pink salmon, crustaceans in immature sockeye, euphausiids and squid in maturing sockeye, euphausiids, fish, and squid in coho, and fish and squid in steelhead stomachs. The stomach contents of chum salmon were notable in that most of their contents were too well digested to identify. Comparison with the findings of workers in the northwestern Pacific showed no significant differences in the kinds of stomach contents, however, a greater amount of material was present in the stomachs they examined. The contents of stomachs from fish taken in various ocean domains were compared. Greater differences were noted in the stomach contents of fish from different domains than from different species. It is suggested that feeding is associated more with availability rather than with preferences for specific organisms. Article in Journal/Newspaper Pink salmon Copepods Canadian Science Publishing (via Crossref) Pacific Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) Journal of the Fisheries Research Board of Canada 23 1 85 100 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Medicine |
spellingShingle |
General Medicine LeBrasseur, R. J. Stomach Contents of Salmon and Steelhead Trout in the Northeastern Pacific Ocean |
topic_facet |
General Medicine |
description |
Stomachs of pink, chum, sockeye, and coho salmon and steelhead trout caught during the summer of 1958 in gillnets fished overnight in the northeastern Pacific Ocean contained mainly zooplankton (Limacina, amphipods, copepods, and euphausiids), squid, and fish. Except for sockeye, there were no differences in contents related to fish size or state of maturity. Differences were found between species in the kinds of stomach contents present. The predominant organisms were amphipods and fish in pink salmon, crustaceans in immature sockeye, euphausiids and squid in maturing sockeye, euphausiids, fish, and squid in coho, and fish and squid in steelhead stomachs. The stomach contents of chum salmon were notable in that most of their contents were too well digested to identify. Comparison with the findings of workers in the northwestern Pacific showed no significant differences in the kinds of stomach contents, however, a greater amount of material was present in the stomachs they examined. The contents of stomachs from fish taken in various ocean domains were compared. Greater differences were noted in the stomach contents of fish from different domains than from different species. It is suggested that feeding is associated more with availability rather than with preferences for specific organisms. |
format |
Article in Journal/Newspaper |
author |
LeBrasseur, R. J. |
author_facet |
LeBrasseur, R. J. |
author_sort |
LeBrasseur, R. J. |
title |
Stomach Contents of Salmon and Steelhead Trout in the Northeastern Pacific Ocean |
title_short |
Stomach Contents of Salmon and Steelhead Trout in the Northeastern Pacific Ocean |
title_full |
Stomach Contents of Salmon and Steelhead Trout in the Northeastern Pacific Ocean |
title_fullStr |
Stomach Contents of Salmon and Steelhead Trout in the Northeastern Pacific Ocean |
title_full_unstemmed |
Stomach Contents of Salmon and Steelhead Trout in the Northeastern Pacific Ocean |
title_sort |
stomach contents of salmon and steelhead trout in the northeastern pacific ocean |
publisher |
Canadian Science Publishing |
publishDate |
1966 |
url |
http://dx.doi.org/10.1139/f66-007 http://www.nrcresearchpress.com/doi/pdf/10.1139/f66-007 |
long_lat |
ENVELOPE(-130.143,-130.143,54.160,54.160) |
geographic |
Pacific Sockeye |
geographic_facet |
Pacific Sockeye |
genre |
Pink salmon Copepods |
genre_facet |
Pink salmon Copepods |
op_source |
Journal of the Fisheries Research Board of Canada volume 23, issue 1, page 85-100 ISSN 0015-296X |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f66-007 |
container_title |
Journal of the Fisheries Research Board of Canada |
container_volume |
23 |
container_issue |
1 |
container_start_page |
85 |
op_container_end_page |
100 |
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1785573053494722560 |