Fig. 5. Muscle myoglobin as a function of body size for male and female California
sea lions from pup size through adulthood. The relationship between body size
and myoglobin was significant for males (y=0.005x+2.56;
r2=0.36, P<0.001) and females
(y=0.03x+1.95; r2=0.78,
P<0.001), and the rate of development was significantly different
for the sexes.