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Drifting invertebrates, stomach contents, and body conditions of juvenile rainbow trout from fall through winter in a Wyoming tailwater

Transactions of the American Fisheries Society

By:
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DOI: 10.1577/1548-8659(2000)129<1187:DISCAB>2.0.CO;2

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Abstract

We investigated the availability of drifting invertebrates and the stomach contents and body conditions of stocked (hatchery) and naturally spawned (wild) juvenile (20-25 cm total length) rainbow trout from fall through winter in the Big Horn River downstream from Boysen Dam in Wyoming. When the density and biomass of drifting invertebrates declined with water temperature during the fall, stomach contents and body conditions substantially decreased among both wild and stocked fish. During the coldest portion of the winter, the density of small drifting invertebrates increased as did the body conditions of both wild and hatchery trout. We suggest that the perceived increase in body conditions during late winter was due to survival of fish with higher body conditions and not growth of fish from fall to late winter.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Drifting invertebrates, stomach contents, and body conditions of juvenile rainbow trout from fall through winter in a Wyoming tailwater
Series title:
Transactions of the American Fisheries Society
DOI:
10.1577/1548-8659(2000)129<1187:DISCAB>2.0.CO;2
Volume
129
Issue:
5
Year Published:
2000
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1187
Last page:
1195
Number of Pages:
9