Mechanical Characteristics of Caudal Fin Resulting from Caudal Muscle-Skeletal Structure of Bluefin Tuna

摘要

The purpose of our study is to investigate the effect of a caudal fin behavior resulting from a caudal muscle-skeletal structure of tuna on the propulsive force from the bioengineering point of view. In this paper, the caudal skeletal structure and mechanical properties on the caudal fin of bluefin tuna (Thunnus thynnus) were examined. The basic knowledge on Young’s modulus of fin rays composing the caudal fin and the phase delay existing between the leading edge and the middle part of the fin was obtained.