Fig. 7. Relationship between shortening duration and twitch rise time for a variety of muscles: (1) cicada singing muscle (Josephson, 1984), (2) rattlesnake shaker muscle (Rome et al., 1996), (3) toadfish swimbladder muscle (Rome et al., 1996), (4) hummingbird pectoralis muscle (Hagiwara et al., 1968), (5) Hyla chrysoscelis external oblique muscle (Girgenrath and Marsh, 1999), (6) zebra finch pectoralis muscle (Hagiwara et al., 1968), (7) blue-breasted quail pectoralis muscle (this study), (8) locust flight muscle (Josephson and Stevenson, 1991), (9) Hyla versicolor external oblique muscle (Girgenrath and Marsh, 1999), (10) starling pectoralis muscle (Goslow and Dial, 1990), (11) saithe white muscle at 0.35 body lengths from the anterior tip (Altringham et al., 1993), (12) scup pink muscle at 20°C (Coughlin et al., 1996), (13) scup red muscle (Swank et al., 1997), (14) toadfish white muscle (Rome et al., 1996), (15) rainbow trout slow muscle at 0.35 body lengths from the rostral tip (Hammond et al., 1998), (16) Argopecten irradians adductor muscle (Olson and Marsh, 1993), (17) toadfish red muscle (Rome et al., 1996). The lines represent data from several different temperatures: (A) Dipsosaurus dorsalis iliofibularis muscle (Marsh, 1988), (B) Dipsosaurus dorsalis iliofibularis muscle (Swoap et al., 1993), (C) Hyla chrysoscelis tensor chordarum muscle (McLister et al., 1995), (D) Hyla versicolor tensor chordarum muscle (McLister et al., 1995). The solid, bold line represents the linear regression for all the data (r2=0.935, P<0.01). For most of the muscles, the twitch rise time was the time from zero to maximum force; however, for the scup pink muscle, it was the time taken from 10 % to 90 % of the peak force.
