... and performance of five Steller sea lions ( Eumetopias jubatus ) and six northern fur seals ( Callorhinus ursinus ). We tested the hypotheses that both species use suction as their primary feeding mode, and that rapid jaw opening was related to suction generation. Steller sea lions used suction as their primary...

... in northern fur seal, Callorhinus ursinus , pups was investigated at two developmental stages in air and water using open-circuit respirometry. Mean in-air resting metabolic rate (RMR) increased significantly from 113±5 ml O 2 min−1 ( N =18) pre-molt to 160±4 ml O 2 min −1 ( N =16; means ± S.E.M.) post-molt...