Skip to Main Content
Water velocity influences prey detection and capture by drift-feeding juvenile coho salmon (Oncorhynchus kisutch) and steelhead (Oncorhynchus mykiss irideus)Author(s): John J. Piccolo; Nicholas F. Hughes; Mason D. Bryant
Source: Canadian Journal of Fisheries and Aquatic Sciences Vol. 65, 2008
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
PDF: View PDF (2.1 MB)
DescriptionWe examined the effects of water velocity on prey detection and capture by drift-feeding juvenile coho salmon (Oncorhynchus kisutch) and steelhead (sea-run rainbow trout,Oncorhynchus mykiss irideus) in laboratory experiments. We used repeated-measures analysis of variance to test the effects of velocity, species, and the velocity x species interaction on prey capture probabiJity, prey detection distance, and swimming speeds during prey capture. We used 3D video analysis to assess the spatial and temporal characteristics of prey detection and capture. Coho and steelhead showed significant, velocity-dependent decreases in capture probability (-65% to 10%, with an increase of velocity from 0.29 to 0.61 m·s-1 ) and prey detection distance, with no effect of species and no velocity x species interaction. Neither velocity nor species affected prey interception speed; fish intercepted prey at their predicted maximum sustainable swimming speed (V max) at all velocities.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationPiccolo, John J.; Hughes, Nicholas F.; Bryant, Mason D. 2008. Water velocity influences prey detection and capture by drift-feeding juvenile coho salmon (Oncorhynchus kisutch) and steelhead (Oncorhynchus mykiss irideus). Canadian Journal of Fisheries and Aquatic Sciences Vol. 65, 2008
KeywordsOncorhynchus kisutch, steelhead, coho salmon
- Effects of steelhead density on growth of Coho salmon in a small coastal California stream
- The effects of water depth on prey detection and capture by juvenile coho salmon and steelhead
- "Investigations of salmon and steelhead trout downstream migrations in Caspar Creek and Little River, Mendocino County, March-July, 1993"
XML: View XML