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Fig. 1. Isometric twitches recorded in anterior (solid lines) and posterior (broken
lines) red muscle from leopard and mako sharks at three temperatures (blue,
15°C; green, 20°C; red, 25/28°C), indicating the close similarity
in contraction and relaxation between the two body positions at each
temperature. Note also the greater effect of reduced temperature exhibited by
the mako samples.