CAJ | 학술논문

在24.4℃~19.2℃下，运用陆基围隔实验生态学方法，研究在静水土池塘养殖条件下放养密度对施氏鲟Acipenser schrenckii 幼鱼生长的影响。将初始体质量（54.86±10.19g）的施氏鲟幼鱼饲养在高密度双面涂塑的聚乙烯编织步制成的面积16m2（4m×4m）、水深1.7m~1.9m 围隔中46d，放养密度为2000、3000、4000和5000尾/667m2。结果显示：试验鱼终末体质量、特定生长率、增重率、成活率随放养密度的增大显著降低（P<0.05），饲料系数随放养密度的增大显著升高（P<0.05），产量在放养密度为4000 尾/667m2时最高，为352.27±22.38kg/667m2。肌肉中粗蛋白质和粗脂肪含量随放养密度的增加而显著降低（P<0.05），水分和灰分含量的变化不显著（P<0.05）。研究表明：静水土池塘养殖施氏鲟幼鱼（50g 左右）的适宜放养密度为3000~4000 尾/667m2。
재24.4℃~19.2℃하，운용륙기위격실험생태학방법，연구재정수토지당양식조건하방양밀도대시씨심Acipenser schrenckii 유어생장적영향。장초시체질량（54.86±10.19g）적시씨심유어사양재고밀도쌍면도소적취을희편직보제성적면적16m2（4m×4m）、수심1.7m~1.9m 위격중46d，방양밀도위2000、3000、4000화5000미/667m2。결과현시：시험어종말체질량、특정생장솔、증중솔、성활솔수방양밀도적증대현저강저（P<0.05），사료계수수방양밀도적증대현저승고（P<0.05），산량재방양밀도위4000 미/667m2시최고，위352.27±22.38kg/667m2。기육중조단백질화조지방함량수방양밀도적증가이현저강저（P<0.05），수분화회분함량적변화불현저（P<0.05）。연구표명：정수토지당양식시씨심유어（50g 좌우）적괄의방양밀도위3000~4000 미/667m2。
The effects of stocking density on growth and muscular composition in Amur sturgeon Acipenser schrenckii in pond-culture were studied at water temperature of 24.4℃~19.2℃ by an enclosure-experimental method. Juvenile Amur sturgeon with initial body weight of(54.86±10.19)g were reared in a 16 m2 enclosure made of plastic disposed in an earthern pond at an initial stocking density of 2000 ind./667m2, 3000 ind./667m2, 4000 ind./667m2, or 5000 ind./667m2 for 46 days. The results showed that there were significant decrease in weight increment, specific growth rate, weight gain rate, and survival rate and increase in the food conversion ratio in the juveniles with increasing stocking density(P<0.05). The maximal yield per unit area [(352.27±22.38)kg/667m2] was found at a stock density of 4000 ind. /667m2. At the end of the experiment, the crude protein content and crude lipid content were found to be signifi-cant decreased (P<0.05) in muscles, without significant difference in moisture and ash content (P>0.05). It is suggested that 3000~4000 ind./667m2 be the optimal stocking density for Amur sturgeon weighting about 50g in pond culture.