Affiliation:
1. Oklahoma Cooperative Fish and Wildlife Research Unit, Oklahoma State University, Stillwater, OK 74078 USA.
2. US Geological Survey, Oklahoma Cooperative Fish and Wildlife Research Unit, Oklahoma State University, Stillwater, OK 74078, USA.
Abstract
Temporal and spatial variability in streams result in heterogeneous gear capture probability (i.e., the proportion of available individuals identified) that confounds interpretation of data used to monitor fish abundance. We modeled tow-barge electrofishing capture probability at multiple spatial scales for nine Ozark Highland stream fishes. In addition to fish size, we identified seven reach-scale environmental characteristics associated with variable capture probability: stream discharge, water depth, conductivity, water clarity, emergent vegetation, wetted width–depth ratio, and proportion of riffle habitat. The magnitude of the relationship between capture probability and both discharge and depth varied among stream fishes. We also identified lithological characteristics among stream segments as a coarse-scale source of variable capture probability. The resulting capture probability model can be used to adjust catch data and derive reach-scale absolute abundance estimates across a wide range of sampling conditions with similar effort as used in more traditional fisheries surveys (i.e., catch per unit effort). Adjusting catch data based on variable capture probability improves the comparability of data sets, thus promoting both well-informed conservation and management decisions and advances in stream-fish ecology.
Publisher
Canadian Science Publishing
Subject
Aquatic Science,Ecology, Evolution, Behavior and Systematics
Reference65 articles.
1. Influence of Pulsed Direct Current Electrofishing on Mortality and Injuries among Four Centrarchid Species
2. Fitting Linear Mixed-Effects Models Usinglme4
3. Habitat availability, social attraction and nest distribution patterns in longear sunfish (Lepomis megalotis peltastes)
4. Bonar, S.A., Contreras-Balderas, S., and Iles, A.C. 2009. An introduction to standardized sampling. In Standard methods for sampling North American freshwater fishes. Edited by S.A. Bonar, W.A. Hubert, and D.W. Willis. American Fisheries Society, Bethesda, Md. pp. 1–12.
5. A Simple Web-Based Tool to Compare Freshwater Fish Data Collected Using AFS Standard Methods
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