
%0 Journal Article
%A Keithan, ED 
%A Ma, JY 
%A Rashi, W 
%T Tendon structure of the Caudal Fin in the Blue Sharkd, <I>Prionace glauca</I>
%J Marine and Freshwater Research
%D 1992/02/01
%V 43
%N 1
%P 149-156
%K 
%R https://doi.org/10.1071/MF9920149
%U https://www.publish.csiro.au/paper/MF9920149 
%X A qualitative description of the myology of three blue shark (Prionace glauca) caudal fins is presented,  forming the basis for a quantitative analysis of the tendon structure. The primary musculature consists  of dorsal epaxial and ventral hypaxial portions. The average crimp angle of collagen fibres in the  epaxial tendons (14.1-26.8º) is significantly greater (P<0.01) than that in the hypaxial tendons (1.8-14.5º). Similarly, epaxial tendons exhibit a significantly lower fibrocyte nuclear density (0.02- 0.03 nuclei µm-2)  than do the corresponding hypaxial tendons (0.05-0.08 nuclei µm-2) (P < 0.01).  The greater crimp angle and lower fibrocyte nuclear density in epaxial tendons indicate increased tensile  strength, consistent with the comparatively greater muscular force required to move the upper caudal lobe. 
