The effects of water depth on prey detection and capture by juvenile coho salmon and steelhead

Abstract

We used three-dimensional video analysis of feeding experiments to determine the effects of water depth on prey detection and capture by drift-feeding juvenile coho salmon (Oncorhynchus kisutch) and steelhead (0. mykiss irideus). Depth treatments were 0.15, 0.30, 0.45 and 0.60 m. Mean prey capture probabilities for both species were constant across all treatments (coho = 0.51, steelhead = 0.39), and did not differ significantly between species.

Citation

Piccolo, J.J.; Hughes, N.F.; Bryant, M.D. 2007. The effects of water depth on prey detection and capture by juvenile coho salmon and steelhead. Ecology of Freshwater Fish 2007: 16: 432---441