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Estimation of Potential Maximum Biomass of Trout in Wyoming Streams to Assist Management Decisions

Estimation of Potential Maximum Biomass of Trout in Wyoming Streams to Assist Management Decisions Fishery managers can benefit from knowledge of the potential maximum biomass (PMB) of trout in streams when making decisions on the allocation of resources to improve fisheries. Resources are most likely to be expended on streams with high PMB and with large differences between PMB and currently measured biomass. We developed and tested a model that uses four easily measured habitat variables to estimate PMB (upper 90th percentile of predicted mean biomass) of trout (Oncorhynchus spp., Salmo trutta, and Salvelinus fontinalis) in Wyoming streams. The habitat variables were proportion of cover, elevation, wetted width, and channel gradient. The PMB model was constructed from data on 166 stream reaches throughout Wyoming and validated on an independent data set of 50 stream reaches. Prediction of PMB in combination with estimation of current biomass and information on habitat quality can provide managers with insight into the extent to which management actions may enhance trout biomass. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png North American Journal of Fisheries Management Oxford University Press

Estimation of Potential Maximum Biomass of Trout in Wyoming Streams to Assist Management Decisions

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Publisher
Oxford University Press
Copyright
© American Fisheries Society
ISSN
0275-5947
eISSN
1548-8675
DOI
10.1577/1548-8675(1996)016<0821:eopmbo>2.3.co;2
Publisher site
See Article on Publisher Site

Abstract

Fishery managers can benefit from knowledge of the potential maximum biomass (PMB) of trout in streams when making decisions on the allocation of resources to improve fisheries. Resources are most likely to be expended on streams with high PMB and with large differences between PMB and currently measured biomass. We developed and tested a model that uses four easily measured habitat variables to estimate PMB (upper 90th percentile of predicted mean biomass) of trout (Oncorhynchus spp., Salmo trutta, and Salvelinus fontinalis) in Wyoming streams. The habitat variables were proportion of cover, elevation, wetted width, and channel gradient. The PMB model was constructed from data on 166 stream reaches throughout Wyoming and validated on an independent data set of 50 stream reaches. Prediction of PMB in combination with estimation of current biomass and information on habitat quality can provide managers with insight into the extent to which management actions may enhance trout biomass.

Journal

North American Journal of Fisheries Management – Oxford University Press

Published: Nov 1, 1996

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