Application of semi-quantitative electrofishing to juvenile salmonid stock surveys |
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Authors: | W W Crozier G J A Kennedy |
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Institution: | Department of Agriculture for Northern Ireland, Aquatic Sciences Research Division, Newforge Lane, Belfast BT9 5PX, U.K. |
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Abstract: | A semi-quantitative electrofishing technique is described, which has applications for assessing distribution and densities of 0+ salmonids in streams. Linear regressions of logarithmically-transformed data satisfactorily described the relationship between numbers of 0+ Atlantic salmon ( Salmo salar L.) and 0+ brown trout ( Salmo trutta L.) captured in a standard 5 min fishing and quantitative population estimates obtained using a commonly used method. Applications of the semi-quantitative technique to management are discussed and a categorization system proposed. |
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Keywords: | salmonid Salmo electrofishing stock assessment |
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