PROBLEM TO BE SOLVED: Although it is an aquaculture water that has been successfully used for aquaculture of fish, favorable results cannot be obtained even if it is used for seedling production of crustaceans such as shrimps. Since the growth of zoea larvae is delayed and the expected yield of seedlings cannot be obtained, the cost of aquaculture is high and the profitability is difficult. SOLUTION: A predetermined amount of strontium, iodine, bromine, or some of them is added to the aquaculture water to promote calcium metabolism in crustacean larvae and promote molting smoothly to promote growth and increase yield. . [Selection figure] None【課題】 魚類の養殖には成功を収めた養殖水ではあるが、エビのような甲殻類の種苗生産に利用しても好ましい結果は得られない。ゾエア幼生の発育が遅れ、期待したほどの種苗の収穫量が得られないので、養殖コストは高くついて採算性に難点がある。【解決手段】 養殖水に所定量のストロンチウムやヨウ素、あるいは臭素、またはそれらの幾つかを添加して甲殻類幼生のカルシウム代謝を促進し、脱皮を円滑に進行させて成長を促進し収量を増やす。【選択図】なし
