イソゴカイ養殖における飼育密度と投餌量が収納に及ぼす影響について

概要

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Experiments on the culture of P.nuntia var. vallata, which is used as a fishing bait, were carried out with the aim to find reasonable values for the worm density in the rearing container (600mm×400mm×150mm), daily amount of mashed eeldiet and daily feeding frequency. The results obtained can be summarized as follows. The best harvest was produced when each container was stocked with two thousand larvae and given two feedings per day. In each container, the harvested weight of worms was 200g with the number worms being of 670 in a period of 150 days. During this period, the survival rate of worms stocked in the container was 32%, the total amount of food given was 250g and the food efficiency was 82%. The average body weight was found to be 0.3g, which is the minimum size suitable for fishing purposes. The correlation cofficient between the harvested number and the average dody weight was found to be -0.52562 in all experimental containers.
日本水産學會の論文