Temperature-dependent interactions between juvenile steelhead and Sacramento pikeminnow in laboratory streams

Carl D. Reese; Bret C. Harvey

doi:10.1577/1548-8659(2002)1312.0.co;2

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Temperature-dependent interactions between juvenile steelhead and Sacramento pikeminnow in laboratory streams

Informally Refereed

Authors:

Carl D. Reese, Bret C. Harvey

Year:

2002

Type:

Miscellaneous Publication

Station:

Pacific Southwest Research Station

DOI:

https://doi.org/10.1577/1548-8659(2002)131<0599:tdibjs>2.0.co;2

Source:

Transactions of the American Fisheries Society 131: 599-606.

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Abstract

Abstract - We examined the temperature dependence of interactions between juvenile steelhead 'Oncorhynchus mykiss' and juvenile Sacramento pikeminnow 'Ptychocheilus grandis' in laboratory streams. Growth of dominant steelhead in water 20-23 degree C was reduced by more than 50% in trials with Sacramento pikeminnow compared with trials with steelhead alone. Comparison of the two- species treatment with one with an equal density of ﬁsh comprised of steelhead alone indicated that the per capita effect of Sacramento pikeminnow was similar to the intraspeci ﬁc effect of steelhead in water 20-23 degree C. In contrast,the growth of dominant steelhead in water 15-18 degree C was unaffected by Sacramento pikeminnow.

Keywords

PSW4351, steelhead, Sacramento pikeminnow, streams, temperature dependence, interactions

Citation

Reese, Carl D.; Harvey, Bret C. 2002. Temperature-dependent interactions between juvenile steelhead and Sacramento pikeminnow in laboratory streams. Transactions of the American Fisheries Society 131: 599-606.