魚類における無機質の要求　ＶＩＩＩ　　コイおよびニジマスにおける飼料りんの有効性

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  • Availability of Dietary Phosphorus in Carp and Rainbow Trout
  • コイ オヨビ ニジマス ニ オケル シリョウ リン ノ ユウコウセイ ニ ツイ

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The availability of inorganic phosphates and phosphorus contained in several materials of feedingstuffs including fish meal was determined with carp and rainbow trout. The availability of dietary phosphorus was evaluated by growth rate of the fish, chemical analysis of the bones and the whole bodies, gross appearance of the bones and apparent absorption of dietary phosphorus from the digestive tract.<br> Among inorganic compounds, primary calcium phosphate, primary sodium or potassium phosphate was utilized effectively by these fish species as a dietary phosphorus source, wheroas secondary and tertiary calcium phosphates were found to be low in availability. The available phosphorus content of the diet significantly affected growth of the fish, mineral composition and gross appearance of the bones and chemical composition of the fish bodies. In carp, thevisceral lipid content was found to increase by the deficiency of available phosphorus in the diet. The availability of phosphorus contained in fish meals was fairly low in carp compared with that in rainbow trout, thus the supplementation of primary sodium phosphate to the diet containing fish meal resulted in acceleration of the growth response of carp. On the other hand, both carp and rainbow trout effectively utilized phosphorus contained in casein and yeast, but the phosphorus in vegetable materials was relatively low in availability.

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  • 日本水産学会誌

    日本水産学会誌 45 (12), 1527-1532, 1979

    公益社団法人 日本水産学会

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