Skip to Main Content
Table 3.

Red muscle (RM) vascularization and ultrastructure in sharks and tuna

Capillary numerical density (mm−2)
Muscle fiber
Species (common name; N)Mass (kg)Fork length (cm) FLSarcomere length (μm) loQA(0)QA(π/2)Area (μm2) (f)Diameter *(μm) (f)
Isurus oxyrinchus (shortfin mako shark; N=2) 9.7 95 2.04±0.01 918±59 316±28 1396±43 42.2 
 12.0 100 2.07±0.01 743±67 1477±83 43.4 
Mean   2.055 831 1437 42.8 
Galeus melastomus (blackmouth catshark; N=7)   484 1778±308 47.6 
Etmopterus spinax (velvet belly lantern shark; N=7)   141 2617±369 57.7 
Chimaera monstrosa (rabbit fish; N=6)   118 954±303 34.9 
Katsuwonus pelamis (skipjack tuna; N=8) ∼2 44 1.78±0.02 2880±171 1615±114 560±30 
Capillary numerical density (mm−2)
Muscle fiber
Species (common name; N)Mass (kg)Fork length (cm) FLSarcomere length (μm) loQA(0)QA(π/2)Area (μm2) (f)Diameter *(μm) (f)
Isurus oxyrinchus (shortfin mako shark; N=2) 9.7 95 2.04±0.01 918±59 316±28 1396±43 42.2 
 12.0 100 2.07±0.01 743±67 1477±83 43.4 
Mean   2.055 831 1437 42.8 
Galeus melastomus (blackmouth catshark; N=7)   484 1778±308 47.6 
Etmopterus spinax (velvet belly lantern shark; N=7)   141 2617±369 57.7 
Chimaera monstrosa (rabbit fish; N=6)   118 954±303 34.9 
Katsuwonus pelamis (skipjack tuna; N=8) ∼2 44 1.78±0.02 2880±171 1615±114 560±30 
Species (common name; N)Capillaries around fiber NCAFCapillary-to-fiber ratio NN(c,f)Capillary diameter (μm) (c)Anisotropy coefficient c(K,0)Capillary length per fiber volume (mm−2) JV(c,f)Volume density of mitochondria (%) VVVolume density of myofibrils (%) VV(my,f)
Isurus oxyrinchus (shortfin mako shark; N=2) 3.74±0.07 1.28 9.4±0.5 1.19 1092.4 25.2±0.8 ;21.0±0.8 ;4.1±0.9 § 59.7±1.5 
 3.64±0.08 1.10 6.4±0.6 29.5±1.2 ;22.2±1.3 ;7.2±1.9 § 52.3±1.8 
Mean 3.69 1.19 7.9 27.4; 21.6; 5.7§ 56 
Galeus melastomus (blackmouth catshark; N=7) 2.5±0.45 0.86 34.1±1.9  
Etmopterus spinax (velvet belly lantern shark; N=7) 1.4±0.26 0.37 30.4±1.8  
Chimaera monstrosa (rabbit fish; N=6) 0.3±0.16 0.11 5.2±0.9  
Katsuwonus pelamis (skipjack tuna; N=8) 4.97±0.13 1.59 4.0±0.3 1.44±0.04 4143±242 28.5±1.0a, ;19.7±0.6a, ;8.8±1.1a, §;24−32b,  66.1±0.9 
Species (common name; N)Capillaries around fiber NCAFCapillary-to-fiber ratio NN(c,f)Capillary diameter (μm) (c)Anisotropy coefficient c(K,0)Capillary length per fiber volume (mm−2) JV(c,f)Volume density of mitochondria (%) VVVolume density of myofibrils (%) VV(my,f)
Isurus oxyrinchus (shortfin mako shark; N=2) 3.74±0.07 1.28 9.4±0.5 1.19 1092.4 25.2±0.8 ;21.0±0.8 ;4.1±0.9 § 59.7±1.5 
 3.64±0.08 1.10 6.4±0.6 29.5±1.2 ;22.2±1.3 ;7.2±1.9 § 52.3±1.8 
Mean 3.69 1.19 7.9 27.4; 21.6; 5.7§ 56 
Galeus melastomus (blackmouth catshark; N=7) 2.5±0.45 0.86 34.1±1.9  
Etmopterus spinax (velvet belly lantern shark; N=7) 1.4±0.26 0.37 30.4±1.8  
Chimaera monstrosa (rabbit fish; N=6) 0.3±0.16 0.11 5.2±0.9  
Katsuwonus pelamis (skipjack tuna; N=8) 4.97±0.13 1.59 4.0±0.3 1.44±0.04 4143±242 28.5±1.0a, ;19.7±0.6a, ;8.8±1.1a, §;24−32b,  66.1±0.9 

All values are means ± s.e.m.

Abbreviations: FL, fork length; QA(0),transverse orientation; QA(π/2), longitudinal orientation.

Data for G. melastomus, E. spinax and C. monstrosa from Totland et al. (1981).

Data for K. pelamis from aMathieu-Costello et al.(1992) and bMoyes et al. (1992).

*

Fiber diameter estimated by 2[((f)/π)0.5];

values given are VV(mt,f) (total mitochondria);

values given are VV(mi,f) (interfibrillar mitochondria);

§

values given are VV(ms,f) (subsarcolemmal mitochondria).

Close Modal

or Create an Account

Close Modal
Close Modal