Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Growth of Bay Scallop, Argopeten irradians at Different Rearing Depths

해만가리비, Argopecten irradians의 양성 수심에 따른 성장

  • 오봉세 (국립수산진흥원 여수수산종묘시험장) ;
  • 정춘구 (국립수산진흥원 통영분소) ;
  • 김숙양 (국립수산진흥원 적조연구과)
  • Published : 2002.02.01
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Abstract

A comparative study on the effect of rearing depths at 2 (surface) and 5 (bottom) m on growth of the scallop was undertaken in Nam-myeon coastal area during June to December, 1997. There were very little difference in the levels of temperature (12.2 ~24.5$^{\circ}C$), salinity (27.3 ~33.1$\textperthousand) and dissolved oxygen (>7.05 mg/l) at a given month. But the chlorophyll level fluctuated between 1.2 and 11.0 $\mu g/l$ at the surface but below 2 $\mu g/l$ at the bosom. Highest phytoplankton density occurred in August and Ceratium dominated it during the period from June to October. Mean growth of the bay scallop at surface and bottom for the six months rearing period was as follows; 0.19 and 0.16 mm/day for shell height, and 0.16 and 0.12 g/day for total weight. Maximum predicted values of shell height calculated by von Bertalanffy growth model were 52.62 mm for the surface and 46.73 mm for the bottom reared scallop. Survival of the scallop was higher (80 %) for the surface group than that at the bottom (60%).

사육기간 중 수온은 10.4∼25.5$^{circ}C$로 해역별, 표$.$저층간의 차이는 크지 않았으며, 염분은 25.00∼31.17 $textperthousand$이었고, 용존산소는 최저 6.13 mg/L 이상으로 양호한 상태를 보였다. Chlorophyll-a는 1.23∼11.05 $\mu\textrm{g}$/L로 저층시험구는 월별 변화가 심하고, 2.00 $\mu\textrm{g}$/L 이하의 저농도를 보였다. 6∼8월 해만가리비 성장기에 Phytoplankton 우점종은 편모조류인 Ceratium sp.가 35.2% 출현하였다. 플랑크톤의 밀도는 대체적으로 8∼9월에 낮았고, 10월에 높았다. 수심에 따른 성장을 보면, 해만가리비의 치패 (평균각고 16.59∼16.69 mm)를 2 m와 5 m 수출에서 사육한 결과, 각고는 표층시험구가 0.19 mm$.$d$^{-1}$이었고, 저층시험구는 0.16 mm$.$d$^{-1}$이었다. 전중량은 표층시험구가 0.16 g$.$d$^{-1}$ 이었고, 저층시험구는 0.12 g$.$d$^{-1}$ 이었다. 각고의 일간성장률은 표층시험구는 0.606%이었고, 저층시험구는 0.549%이었다. 전중량의 일간성장률은 표층시험구가 1.972%이었고, 저층시험구는 1.781%이었다. von Bertalanffy 성장 모델에 의해 얻어진 각고의 최대 예상값은 52.62 mm (표층시험구) 및 46.73 mm (저층시험구)이었다. 생존율은 표층구가 80.0%로 저층구보다 높아 표층 (수심 2 m)이 저층 (수심 5 m)보다 해만가리비의 성장 및 생존에 적합한 수층이었다.

Keywords

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