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- W2316559761 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 478:211-221 (2013) - DOI: https://doi.org/10.3354/meps10179 Lipid content of chum salmon Oncorhynchus keta affected by pink salmon O. gorbuscha abundance in the central Bering Sea Toshiki Kaga1,*, Shunpei Sato2, Tomonori Azumaya1, Nancy D. Davis3,4, Masa-aki Fukuwaka1,5 1Hokkaido National Fisheries Research Institute, Fisheries Research Agency (HNFRI), 116 Katsurakoi, Kushiro 085-0802, Japan 2HNFRI, 2-2 Nakanoshima, Toyohira-ku, Sapporo 062-0922, Japan 3School of Aquatic and Fishery Sciences, University of Washington, Box 355020, Seattle, Washington 98195-5020, USA 4Present address: North Pacific Anadromous Fish Commission, Suite 502, 889 West Pender Street, Vancouver, British Columbia, V6C 3B2, Canada 5Present address: Seikai National Fisheries Research Institute, Fisheries Research Agency, 1551-8 Tairamachi, Nagasaki 851-2213, Japan *Email: tkaga@fra.affrc.go.jp ABSTRACT: To assess effects of intra- and inter-specific interactions on chum salmon in the central Bering Sea, chum salmon lipid content was analyzed as a proxy for body condition. We measured the lipid contents of 466 immature individuals collected during summer from 2002 to 2007. Individual variation in log-transformed lipid content was tested using multiple regression analysis with biological and environmental variables. A regression model that included chum salmon fork length and pink salmon CPUE (number of fish caught per 1500 m of gillnet) was the most effective in describing variation in lipid content. Path analysis showed that the negative effect of pink salmon CPUE was stronger than the effect of chum salmon CPUE on chum salmon lipid content. Stomach content analysis of 283 chum salmon indicated non-crustacean zooplankton (appendicularian, chaetognath, cnidarian, ctenophore, polychaete, and pteropod) was higher under conditions of high pink salmon CPUE. Increased consumption of non-crustacean zooplankton containing a low lipid level could lower the lipid content of chum salmon. Thus, chum salmon lipid content could be affected directly by their shift in prey items and indirectly by interspecific competition with pink salmon. KEY WORDS: Lipid content · Chum salmon · Pink salmon · Central Bering Sea · Competition · Prey selection Full text in pdf format PreviousNextCite this article as: Kaga T, Sato S, Azumaya T, Davis ND, Fukuwaka M (2013) Lipid content of chum salmon Oncorhynchus keta affected by pink salmon O. gorbuscha abundance in the central Bering Sea. Mar Ecol Prog Ser 478:211-221. https://doi.org/10.3354/meps10179 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 478. Online publication date: March 25, 2013 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2013 Inter-Research." @default.
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- W2316559761 title "Lipid content of chum salmon Oncorhynchus keta affected by pink salmon O. gorbuscha abundance in the central Bering Sea" @default.
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