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자료유형
학술저널
저자정보
저널정보
한국수산과학회 양식분과 한국양식학회지 한국양식학회지 제15권 제3호
발행연도
2002.8
수록면
145 - 155 (11page)

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Effect of density (30, 40, 65, 90 or 120/cage) of lantern and bottom cages on growth of the ark shell, Scapharca satowi was studied in the Korean west coast from April 2000 to October 2001, when the following range of environmental conditions prevailed : temperature : 4.2-25.5℃, salinity : 30.23-32.15‰, dissolved oxygen : 5.12-7.16 ml/l, pH : 7.84-8.17, phosphate : 0.22-0.56μM, dissolved inorganic nitrogen : 3.16-9.10μM, suspended solid : 7.6-17.9 ㎎/l, chemical oxygen demand: 0.46-1.61 ㎎/l and chlorophyll-a : 0.92-5.93 ㎍/l. Daily growth rate of shell length ranged from 0.066 to 0.071 ㎜/day for the lantern net cages, and from 0.079 to 0.082 ㎜/day for the bottom cages. Total weight also ranged from 0.067 to 0.082 g/day in the lantern net cages, as against 0.099 to 0.114 g/day in the bottom cages. Hemoglobin content of S. satowi(55 ㎜ shell length), which was about 3.9 g/dl during February, 2001, increased to 6.0 and 7.0 g/dl during October, 2001 in animals culture in the lantern and bottom cages, respectively. ANOVA test of the growth rate showed that the growth rate of S. satowi was significantly dependent on rearing density and the tested culture methods(P<0.0001). The daily growth rate of the shell length was more significantly correlated with water temperature; the growth rate of shell length and total weight showed a tendency decrease with decreasing temperature. In cages suspended at the bottom, not only the increase shell weight but also the meat obtainable from comparable sized S. satowi was greater. Survival decreased with increasing density and was optimal at the density of 30 individual/cage.

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