Data from: Questioning assumptions of trophic behavior in a broadly ranging marine predator guild

Oliver N. Shipley, Jill A. Olin, Mike Power, Robert M. Cerrato, Michael G. Frisk, Robert. M. Cerrato & Michael Power
We evaluated whether existing assumptions regarding the trophic ecology of a poorly-studied predator guild, northwest (NW) Atlantic skates (family: Rajidae), were supported across broad geographic scales. Four hypotheses were tested using carbon (δ13C) and nitrogen (δ15N) stable isotope values as metrics of foraging behavior: 1) species exhibit ontogenetic shifts in habitat and thus display a shift in 13C with differential use of the continental shelf; 2) species exhibit ontogenetic prey shifts (i.e., from smaller to...
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