Key points are not available for this paper at this time.
A. Langeland, , B. Jonsson, N. Jonsson, Resource Partitioning and Niche Shift in Arctic Charr Salvelinus alpinus and Brown Trout Salmo trutta, Journal of Animal Ecology, Vol. 60, No. 3 (Oct., 1991), pp. 895-912
Langeland et al. (Tue,) studied this question.