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J. F. Sloane, F. J. Ebling, J. A. Kitching, Sylvia J. Lilly, The Ecology of the Lough Ine Rapids with Special Reference to Water Currents, Journal of Animal Ecology, Vol. 26, No. 1 (May, 1957), pp. 197-211
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Sloane et al. (1957) studied this question.
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