ISSN : 1225-3480
실험에 사용한 어미는 2011년 7월 4일 전남 영광군 백수면하사리에서 채집된 어미를 수송 후 채란하여 3일간 유생 사육한 초기치패 (각장 196 ± 14 μm) 9천 6백만 마리를 사용하였으며, 시험기간은 2010년 7월 7일부터 8월 6일까지 30일간사육 실험하였다. 실험 개시 전 각 저질개선제의 농도별로 치패의 생존가능 범위 조사 하였고, 농도는 요오드 10 ppm, 과산화수소 5 ppm, 차염소산나트륨 100 ppm, 이산화염소 100ppm, 과망간산칼륨 5 ppm 으로 실험하였다. 실험 결과 성장은 차염소산나트륨 100 ppm 실험구가 1.04 ± 0.26 mm 로가장 높았고, 이산화염소 100 ppm 실험구 1.03 ± 0.25mm, 요오드 실험구 1.01 ± 0.28 mm 순이었고, 생존율은이산화염소 100 ppm 실험구가 31.4% 로 가장 높았고, 차염소산나트륨 실험구 100 ppm 12.1%, 요오드 실험구 10ppm 11.6%, 과산화수소 실험구 5 ppm 1.5% 순이었으며, 과망간산칼륨 실험구 5 ppm 은 전량 폐사하였다.
The study describes growth and survival on different kinds of sediment improvements of early spats of the hard clam, Meretrix petechialis. Specimens of the mature hard clam were collected in the intertidal zone of Yeonggwang, Korea, July 2011. After transportation, early spats(shell length 196 ± 14 μm) collected in mature hard clam were used. Experiment period were July 7 to August 6 in 2011 (30 days). Sediment improvements used iodine(10 ppm), hydrogen peroxide(H2O2, 5 ppm), sodium hypochlorite (NaClO, 100 ppm), chlorine dioxide(ClO2, 100 ppm) and potassium permanganate (KMnO4, 5 ppm). After cultured during 30 days, shell length growth of hard clam were observed 1.04 ± 0.26 mm in sodium hypochlorite 100 ppm, 1.03 ± 0.25 mm in chlorine dioxide 100 ppm and 1.01 ± 0.28 mm in iodine 10 ppm. Survival rate were 31.4% in chlorine dioxide 100 ppm, 12.1% in sodium hypochlorite 100 ppm, 11.6% in iodine 10 ppm, 1.5% in hydrogen peroxide 5 ppm and 0% in potassium permanganate 5 ppm.
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