Key points are not available for this paper at this time.
J. Heggenes, O. M. W. Krog, , J. G. Dokk, Homeostatic Behavioural Responses in a Changing Environment: Brown Trout (Salmo trutta) become Nocturnal during Winter, Journal of Animal Ecology, Vol. 62, No. 2 (Apr., 1993), pp. 295-308
Heggenes et al. (Thu,) studied this question.