異なる海域における種々の魚種の鮮度低下速度とそれに及ぼす棲息水温の影響〔英文〕

概要

論文の詳細を見る
To study temporal changes in K values (a freshness index) of fish muscle: sample fishes com-prising of 82 species were collected from fishing grounds of the tropical, subtropical and temperate waters ranging from 28°C to 9°C in bottom temperatures. K values of fish kept in water of 32°C since killing, increased linearly with the lapse of time. The slope of the regression line for a fish was defined as the increasing rate of K values at 32°C, and designated as ΔK32, which can be used as an indicator to express the species specific speed of lowering freshness of the fish. This indicator enables us to formulate speeds of lowering in freshness for fishes of different species and from various waters. With the bottom temperature (t) of fishing grounds, ΔK32 related reversely as ΔK32=-0.4708t+19.240. That ΔK32 of the fishes inhabiting the tropical waters were generally lower than those of the fishes in the subtropical and temperate waters may explain the fact that freshness of fishes at catching, landing and in retail markets in Thailand was much better than one might expect. Adaptation to the warmer waters was suggested by higher ΔK32 of fishes living in cooler waters than those of the same fishes living in warmer waters. Putting increasing rate of K values for the fish kept at various temperatures (t) as ΔKt, this related with t as ln ΔKt=0.10413t+b.
日本水産學會の論文