Table 2.

Muscle morphology of the pectoral fin at five days post fertilization

VariableMeans.e.m.
Fin area (μm2)564652021
Muscle area (μm2)25590993
Total fin area (μm2)820552535
Ratio fin area/muscle area2.20.1
Fin area (%)68.81
Muscle area (%)31.21
Number of extensor fibers54.40.9
Number of flexor fibers51.81.6
  • All values are given as mean of the pectoral fin musculature (N=5) of the left pectoral fin of 5 dpf fish. Fin and muscle areas calculated from lateral view projections. There is no significant difference between the number of extensor and flexor fibers (t-test, t=1.431, P=0.1902).