Event Title

Diet and Feeding Behavior of Ammodytes personatus and Clupea palasii in the San Juan Archipelago (Fall 2015)

Presentation Abstract

Many marine upwelling ecosystems are characterized by low species diversity of the middle tropic level. In wasp-waist systems such as the San Juan Archipelago, forage fishes serve as an important trophic link between zooplankton and apex predators. The Pacific herring and the Pacific sand lance are two important forage fish in this region with different life histories that may influence different feeding ecologies. This study explores the trophic ecology of the Pacific sand lance through diet analysis and observations of diel behavior. Calanoid copepods appear to be the preferred prey item of sand lance, while herring prefer amphipods. Lab and field observations indicate that sand lance are crepuscular feeders. These results further elucidate the strategies Pacific sand lance have developed in order to maximize foraging while minimizing predation risk.

Session Title

Toxics, Pollutants and Species

Conference Track

Salish Sea Snapshots

Conference Name

Salish Sea Ecosystem Conference (2016 : Vancouver, B.C.)

Document Type

Event

Location

2016SSEC

Type of Presentation

Snapshot

Contributing Repository

Digital content made available by University Archives, Heritage Resources, Western Libraries, Western Washington University.

Rights

This resource is displayed for educational purposes only and may be subject to U.S. and international copyright laws. For more information about rights or obtaining copies of this resource, please contact University Archives, Heritage Resources, Western Libraries, Western Washington University, Bellingham, WA 98225-9103, USA (360-650-7534; heritage.resources@wwu.edu) and refer to the collection name and identifier. Any materials cited must be attributed to the Salish Sea Ecosystem Conference Records, University Archives, Heritage Resources, Western Libraries, Western Washington University.

Type

Text

Language

English

Format

application/pdf

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Diet and Feeding Behavior of Ammodytes personatus and Clupea palasii in the San Juan Archipelago (Fall 2015)

2016SSEC

Many marine upwelling ecosystems are characterized by low species diversity of the middle tropic level. In wasp-waist systems such as the San Juan Archipelago, forage fishes serve as an important trophic link between zooplankton and apex predators. The Pacific herring and the Pacific sand lance are two important forage fish in this region with different life histories that may influence different feeding ecologies. This study explores the trophic ecology of the Pacific sand lance through diet analysis and observations of diel behavior. Calanoid copepods appear to be the preferred prey item of sand lance, while herring prefer amphipods. Lab and field observations indicate that sand lance are crepuscular feeders. These results further elucidate the strategies Pacific sand lance have developed in order to maximize foraging while minimizing predation risk.