Diets of and trophic relationships among dominant marine nekton within the northern California Current ecosystem

Miller, Todd W. and Brodeur, Richard D. (2007) Diets of and trophic relationships among dominant marine nekton within the northern California Current ecosystem. Fishery Bulletin, 105(4), pp. 548-559.

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Abstract

In this study we analyzed the diets of 26 nekton species collected from two years (2000 and 2002) off Oregon and northern California to describe dominant nekton trophic groups of the northern California Current (NCC) pelagic ecosystem. We also examined interannual variation in the diets of three nekton species. Cluster analysis of predator diets resulted in nekton trophic groups based on the consumption of copepods, euphausiids, brachyuran larvae, larval juvenile fishes, and adult nekton. However, many fish within trophic groups consumed prey from multiple trophic levels—euphausiids being the most widely consumed. Comparison of diets between years showed that most variation occurred with changes in the contribution of euphausiids and brachyuran larvae to nekton diets. The importance of euphausiids and other crustacean prey to nekton indicates that omnivory is an important characteristic of the NCC food web; however it may change during periods of lower or higher upwelling and ecosystem production.

Item Type: Article
Title: Diets of and trophic relationships among dominant marine nekton within the northern California Current ecosystem
Personal Creator/Author:
CreatorsEmail
Miller, Todd W.
Brodeur, Richard D.
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 105
Number: 4
Page Range: pp. 548-559
Date: 2007
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8869
Depositing User: Patti M. Marraro
Date Deposited: 18 Jun 2012 09:37
Last Modified: 02 Jan 2014 19:23
URI: http://aquaticcommons.org/id/eprint/8869

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