...Jeanine M. Donley; Robert E. Shadwick; Chugey A. Sepulveda; Douglas A. Syme The work loop technique was used to examine contractile properties of the red aerobic locomotor muscle (RM) in the ectothermic leopard shark Triakis semifasciata and endothermic shortfin mako shark Isurus oxyrinchus...

...( Triakis semifasciata ) and the blue shark (Prionace glauca ),RM occupies the position where it is typically found in most fishes; more posterior and along the lateral edge of the body. Comparisons among sharks in this study revealed no differences in the total RM quantity (approximately 2–3% of body mass...

... brevirostris Poey) was determined to be 1.1 Ls −1 , where L is body length. The U crit of the leopard shark ( Triakis semifasciata Girard) was found to vary inversely with body size; from about 1.6Ls −1 in 30–50cm sharks to 0.6LS −1 in 120cm sharks. Large Triakis adopt ram gill ventilation at swimming speeds...