Electrofishing capture probability of smallmouth bass in streams
North American Journal of Fisheries Management
By: D.C. Dauwalter and W.L. Fisher
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Abstract
Abundance estimation is an integral part of understanding the ecology and advancing the management of fish populations and communities. Mark-recapture and removal methods are commonly used to estimate the abundance of stream fishes. Alternatively, abundance can be estimated by dividing the number of individuals sampled by the probability of capture. We conducted a mark-recapture study and used multiple repeated-measures logistic regression to determine the influence of fish size, sampling procedures, and stream habitat variables on the cumulative capture probability for smallmouth bass Micropterus dolomieu in two eastern Oklahoma streams. The predicted capture probability was used to adjust the number of individuals sampled to obtain abundance estimates. The observed capture probabilities were higher for larger fish and decreased with successive electrofishing passes for larger fish only. Model selection suggested that the number of electrofishing passes, fish length, and mean thalweg depth affected capture probabilities the most; there was little evidence for any effect of electrofishing power density and woody debris density on capture probability. Leave-one-out cross validation showed that the cumulative capture probability model predicts smallmouth abundance accurately. ?? Copyright by the American Fisheries Society 2007.
Suggested Citation
Dauwalter, D., Fisher, W., 2007, Electrofishing capture probability of smallmouth bass in streams: North American Journal of Fisheries Management, v. 27, no. 1, p. 162-171, https://doi.org/10.1577/M06-008.1.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Electrofishing capture probability of smallmouth bass in streams |
| Series title | North American Journal of Fisheries Management |
| DOI | 10.1577/M06-008.1 |
| Volume | 27 |
| Issue | 1 |
| Publication Date | February 01, 2007 |
| Year Published | 2007 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | North American Journal of Fisheries Management |
| First page | 162 |
| Last page | 171 |