Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Effects of Various Stimulants on Spawning Induction and Early Development at Different Water Temperatures in the Noble Scallop

흔한가리비, Chlamys nobilis의 자극방법별 산란유발 효과와 난 발생에 미치는 수온의 영향

  • 원승환 (국립수산과학원 남해수산연구소 북제주수산종묘시험장) ;
  • 한석중 (국립수산과학원 남해수산연구소 북제주수산종묘시험장)
  • Published : 2004.05.01
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Abstract

We examined the effects of stimulants including sunlight and UV-irradiation on the spawning induction and early development of the noble scallop, Chlamys nobilis. The sunlight stimulation resulted in nuch faster spawning induction (100% success within 40 minutes) compared to UV-irradiation (100% success within 70 minutes). Early development of the scallop larva took place between 15$^{\circ}C$ to 3$0^{\circ}C$. The time to reach the early D-shaped stage was 63.5, 31.5, 18.5 and 17.0 hours at 15, 20, 25 and 3$0^{\circ}C$, respectively. The correlations between the water temperature-(WT) regimes and the time (t) required for each developmental stage are as follows. 2 cell stage: 1/t=0.0606WT-0.6194 ($r^2$=0.9791) 8 cell stage: 1/t=0.0304WT-0.3453 ($r^2$=0.9941) Morula: 1/t=0.0100WT-0.1049 ($r^2$=0.9663) Trochophore: 1/t=0.0058WT-0.0618 ($r^2$=0.9848) D-shaped larva: 1/t=0.0030WT-0.0282 ($r^2$=0.9731) These correlations indicated that the biological minimum temperature of the species is around 10.44$^{\circ}C$. The highest survival rate up to D-shaped larva at different water temperature was observed at $25^{\circ}C$.

흔한가리비, Chiamys nobilis의 산란유발 및 종묘생산을 위한 생물학적 기초자료를 얻고자 자극방법별 효과와 난 발생에 미치는 수온의 영향에 대하여 조사하였다. 산란유발방법으로는 햇빛노출자극방법이 자극 후 40분 이내 100%의 반응을 보여 반응시간이 가장 빨랐고, 그 외 자외선 조가 해수 자극방법에서도 70분 이내 100%의 반응으로 양호한 결과를 나타냈다. 발생 가능수온은 15∼3$0^{\circ}C$로 나타났다. 또한 초기 D상 유생에 도달하는 시간은 15, 20, 25 및 3$0^{\circ}C$에서 각각 63.5, 31.5, 18.5및 17.0시간이 소요되었다. 수온(WT: $^{\circ}C$)과 각 발생 단계별 소요시간(t: time)의 관계식은 다음과 같다. 2세포기: 1/t=0.0606WT-0.6194 ($r^2$=0.9791) 8세포기: 1/t=0.0304WT-0.3453 ($r^2$=0.9941) 상실기: 1/t=(1.0100WT-0.1049 ($r^2$=0.9663) 담륜자기: 1/t=0.0058WT-0.0618 ($r^2$=0.9848) D상유생: 1/t=0.0030WT-0.0282 ($r^2$=0.9731) 이들 관계식을 기초로 한 흔한가리비의 초기발생에 있어서 난 발생이 정지하는 생물학적 영도(Biological minimum temperature)는 평균 10.44$^{\circ}C$였고, 수온별 발생 시 D상까지의 생존율은 $25^{\circ}C$에서 가장 높았다.

Keywords

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