Table 2.

Fibre size and capillary dimensions of pectoral adductor muscle from four species of Antarctic fishes

N. coriicepsG. gibberifronsC. aceratusC. rastrospinosus
Āf (μm2)1843±312A2103±194A,B,*2932±428B9352±318C
ā(c) (μm2)30.5±1.2A35.1±1.2B48.3±1.8C26.2±3.0D
(c) (μm)19.6±0.3A22.4±0.4B24.6±0.6C22.9±1.48B,C
C:F1.17±0.11A0.91±0.08A,*1.49±0.24A,B2.65±0.22B
NA(c,f) (mm-2)819±77A438±9B,*621±58C257±18D
Jv(c,f) (mm-2)1057±114A696±34B880±73A367±25C
  • Āf, cross-sectional area of fibres; ā(c), cross-sectional area of capillaries; (c), boundary length of capillaries; C:F, capillary to fibre ratio; NA(c,f), numerical density of capillaries per fibre cross sectional area; Jv(c,f); capillary length per fibre volume, assuming c(K,0)=1.11 and 1.44 for nototheniids and channichthyids, respectively.

    Values are means ± S.E.M.

    Letters designate significant differences among species (P<0.05).

  • * Londraville and Sidell (1990a,b).