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Fig. 6. The effects of cycle shortening duration on work output for a range of
aerobic power generating muscles. Data are from zebra finch Taeniopygia
guttata pectoralis muscle (present study) and budgerigar
Melopsittacus undulatus pectoralis muscle (present study); `birds
in vivo' are European starling Sturnus vulgaris pectoralis
muscle (Biewener et al.,
1992), mallard Anas platyrhynchos pectoralis muscle
(Williamson et al., 2001),
cockatiel Nymphicus hollandicus pectoralis muscle
(Hedrick et al., 2003) and
pigeon Columba livia pectoralis muscle
(Biewener et al., 1998);
`flight muscles in vitro' are tettigonid (Neoconocephalus
triops) wing muscles (Josephson,
1985b) and hawkmoth dorsoventral muscle
(Stevenson and Josephson,
1990); `other muscles in vitro' are Hyla
versicolor and H. chrysoscelis external oblique muscles
(Girgenrath and Marsh, 1999),
mouse (Mus) and rat (Rattus) diaphragm muscle
(Altringham and Young, 1991),
mouse soleus muscle (Askew and Marsh,
1997) and rat soleus muscle
(Swoap et al., 1997). The
solid line indicates scaling relationships for data excluding the data from
the present study, and broken lines the upper and lower 95% confidence
limits.
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