| 초록 |
We performed three sets of feeding trials to establish the optimal feed size (Exp-I), stocking density (Exp-II), and dissolved oxygen level (DO) (Exp-III) for olive flounder Paralichthys olivaceus. In Exp-1, four replicate groups of fish ( $53.6{ pm}0.9g$ ) were fed commercial diets with three particle sizes (small, medium, and large). In Exp-II, fish ( $30.0{ pm}0.1g$ ) were reared at four stocking densities (1.8, 3.5, 5.3, and $7.1kg/m^3$ ). In Exp-III, fish ( $187{ pm}1.48g$ ) were reared under two different DO levels (2-3 and 6-7 mg/L). In Exp-I, fish fed the large-particle diet gained significantly more weight and had a lower feed conversion ratio than fish fed the small- and medium-particle diets. In Exp-II, fish reared at 1.8 and $3.5kg/m^3$ gained slightly more weight and had lower feed conversion ratios than fish reared at 5.3 and $7.1kg/m^3$ , although these differences were not significant. In Exp-III, negative effects were observed in the low DO groups. Therefore, under our experimental conditions, the optimal feed particle size, stocking density, and DO level for olive flounder were 9-9.4 mm, $3.5kg/m^3$ , and 6-7 mg/L, respectively. |
