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.
Keywords
coho,
foraging,
segregation,
steelhead,
water depth
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