STUDIES ON THE MECHANISM OF CONSUMPTION AND ACCUMULATION OF VITAMIN A IN FISH

概要

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1. A mathematical consideration was made on the mechanism of the consumption and accumulation of vitamin A in fish body of the oil sole (Athresthes evermanni JORDAN & STARKS), which lives in the deep sea in north-eastern Japan. 2. The velocity of accumulation of vitamin A into the liver including the pyloric ceaca are given by dA/dt=αfW-γ•α-α'/βW (1) where, W denotes the body-weight of the fish, f, the vitamin A concentration of feeding substances, α, the rate of feeding, α', the rate of feeding necessary for the minimum vitality, β, a coefficient concerning the increase of body-weight, γ, a coefficient concerning the consumption of vitamin A in the body. 3. Vitamin A contents (A) of the liver and the pyloric ceaca of the fish are of a function of the body-length (L), which is expressed by A/ln ?? k=∫λn/1-λdλ=φ(λ) (2) where, l ?? signifies the maximum body-length of the species, λ equals l/l ?? , k is αf-γ/β(α-α')/ε (ε: a coefficient concerning the rate of growth).
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