ISSN : 1225-3480
본 조사는 진해만에서 지중해담치 양식의 연간 생산력을 추정하기 위해 실시하였다. 양식장내 연간 수온변화는 7.2-25.9 ℃, 염분도는 32.9-4.0 psu, 용존산소는 7.9-8.7 mg/l로 나타났다. 4월에 각장의 길이가 최소 3.3 mm인 치패가 가입되었으며, 조사기간 중 최대 82.5 mm까지 채집되었다. 각장의 경우 시간이 지남에 따라 연중 점진적으로 증가하는 양상을 보였으나, 습중량은 여름철에 급격히 증가하였다. 따라서 월별 생산량의 경우도 가입 이후에 완만한 증가를 나타내다가 여름철에 접어들면서 급격히 증가한 후에 수온이 하강하면서 감소하였다. 여름철 성장이 전체 생산량을 좌우하는 것으로 나타났다. 양식장내 지중해담치의 연간 생산량은 수심별로 차이를 나타냈다. 생산량자료를 근거로 생산력을 계산한 결과, 조사기간 동안 진해만의 지중해담치 생산력은 약 196 ton/ha/yr으로 추정되었다.
This study have conducted to calibrate the productivities on the mussel (Mytilus galloprovincialis) cultures in Jinhae Bay. Annual water temperature, salinity and dissolved oxygen have varied to 7.2-25.9℃, 32.9-34.0 psu, 7.9-8.7 mg/l, respectively. In April, the smallest size of spat, 3.3 mm in shell length, have recruited, and 82.5 mm have recorded to the maximum. In summer, variations of growing up between individuals showed both shell length and weights at same cohort. Annual production at 2 m, 5 m, 8 m depth calculated to 10.91, 10.85 and 9.19 gWWt/ind./yr, respectively. Mussel cultivated in the upper part of the water column (two meter depth) were significantly longer and heavier than those in lower part (eight meter depth). After the recruitment, monthly production showed gradual increment at all positions during summer. As results, annual production of mussel cultivated seemed to be controlled by conditions of growing up in summer. Based on the productivities calculated to this study, the total annual production of the mussel cultivated in Jinhae Bay have estimated about 196 ton/ha/yr.
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