Neil B. Metcalfe, Sveinn K. Valdimarsson, Neil H. C. Fraser, Habitat Profitability and Choice in a Sit-And-Wait Predator: Juvenile Salmon Prefer Slower Currents on Darker Nights, Journal of Animal Ecology, Vol. 66, No. 6 (Nov., 1997), pp. 866-875
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Metcalfe et al. (1997) studied this question.
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