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An electrofishing device and sampling procedure was developed to sample lotic microhabitats. The device consists of a rectangular electrode frame powered by an alternating current generator. The device was very effective in immobilizing fish within the electrode frame. A time delay between setting and sampling electrode frames permitted a period without disturbance prior to sampling. No significant correlations were found between capture rates and time delays greater than 11 minutes. Consistent results were obtained in repeated sampling of a variety of microhabitats within a single stream reach. The device and sampling procedure allows multispecies abundances to be quantified with regard to discrete units of microhabitat and a priori sampling designs to be used.
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Bain et al. (1985) studied this question.
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