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ISSN : 1225-3480
일본(기수)재첩 유생사육을 위한 최적조건을 파악하기 위하여 수온, 염분, 유생 수용밀도, 먹이생물 종류 및 공급량, 채묘방법에 따른 성장과 생존율을 조사하였다. 일본(기수)재첩의 부유유생은 <TEX>$24^{\circ}C$</TEX>와 <TEX>$27^{\circ}C$</TEX>에서 빠른 성장을 보였으며, <TEX>$18^{\circ}C$</TEX>와 <TEX>$21^{\circ}C$</TEX>에서 50% 이상의 높은 생존율을 보임으로서 유생 사육을 위한 적정 수온은 <TEX>$21-24^{\circ}C$</TEX>이며, 최적수온은 <TEX>$24^{\circ}C$</TEX> 이었다. 또한 염분 3 psu 이상에서 성장과 생존이 가능하였으나 적정 염분은 6-9 psu 이었다. 유생밀도별 사육시험에서 1 ml당 1-10 개체에서 높은 성장과 생존율을 보였으나 경제성을 고려한 적정 유생사육 밀도는 1 ml당 10 개체였다. 먹이생물에 따른 유생의 성장과 생존율은 Isochrysis galbana, Pavlova lutheri 및 Chaetoceros calcitrans를 혼합하여 10,000-20,000 cells/ml의 밀도로 공급하는 것이 가장 효과적이었다. 성숙유생의 채묘는 모래저질에서 성장과 생존율이 유의하게 효과적이었으며, 특히 0.25 mm 이하의 미세사질에서 높은 생존율을 보였다.
기수재첩 유생사육을 위한 최적조건을 파악하기 위하여 수온, 염분, 유생 수용밀도, 먹이생물 종류 및 공급량, 채묘방법에 따른 성장과 생존율을 조사하였다. 기수재첩의 부유유생은 24℃와 27℃에서 빠른 성장을 보였으며, 18℃와 21℃에서 50% 이상의 높은 생존율을 보임으로서 유생 사육을 위한 적정 수온은 21-24℃이며, 최적 수온은24℃ 이었다. 또한 염분 3 psu 이상에서 성장과 생존이 가능하였으나 적정 염분은 6-9 psu 이었다. 유생밀도별 사육시험에서 1 ml당 1-10 개체에서 높은 성장과 생존율을 보였으나경제성을 고려한 적정 유생사육 밀도는 1 ml당 10 개체였다. 먹이생물에 따른 유생의 성장과 생존율은 Isochrysis galbana, Pavlova lutheri 및 Chaetoceros calcitrans를 혼합하여 10,000-20,000 cells/ml의 밀도로 공급하는 것이 가장 효과적이었다. 성숙유생의 채묘는 모래저질에서 성장과 생존율이 유의하게 효과적 이었으며, 특히 0.25 mm 이하의 미세사질에서 높은 생존율을 보였다.
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