Latitudinal variation in ecological opportunity and intraspecific competition indicates differences in niche variability and diet specialization of Arctic marine predators.

In addition, the WIC declined at a higher rate than BIC with increasing latitude, however was only marginally significant (Fig. 3 A,B; WIC: slope = −0.05, r 2 = 0.41, F 1,7 = 4.92, P = 0.06; BIC: slope = −0.03, r 2 = 0.25, F 1,7 = 2.38, P = 0.17) and was largely influenced by the slope of the beluga data.

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