Fig. 4.

Prey preferences of Pacific, Atlantic, and Southern bluefin tuna in various ocean regions. Feeding studies have indicated that Pacific, Atlantic, and Southern bluefin diets tend to be dominated by one or two prey items, usually energetically rich, schooling fishes, in many feeding areas. Changes in residency patterns and/or declines in physical conditions of bluefin tuna have been shown in some of these areas when target prey is scarce. See SI Appendix, Table S7 for references and energy density of preferred prey.