カツヲとサンマの魚體温と形状に關する測定

抄録

The Body-temperature of “Katuo” Θ, measured immediately after angled up on board of fishing vessels shows a linear relation to the water temperature (θ) at the fishing locality, as indicated im Fig. 1, and Θ is always 1°-3°C higher than θ, while the difference (Θ-θ) increases with θ (Fig. 2-4). The elements regarding to the features of fish-body for “Katuo” and “Sanma, ” such as the body-weight (W), the total length (L), body-length (l), height (h), circumference (8), thickness (d), and density (p) were measured and the factor k=Wx10⁸/l², the ellipticity of the cross section (c), the ratios, α=h/l, β=d/l, 8/l, 8/h and the products, αβ, hd, etc. were computed. Then, the mutual relations among the factors were discussed (Fig. 5-11), with the empirical equations, which are almost represented in linear forms approximately. As a result of it, the relation k ∞ αβ was established. Also we find that the measurement of ₈ is useful for the rapid inference of k or αβ.