CAJ | 학술논문

在水温15～25℃下，将平均体质量分别为792?27±48?89 g（大）、513?49±39?19 g（中）和185?59±25?51 g （小）的圆斑星鲽（Verasper variegatus），按5?5 kg／m2和7?5 kg／m2的密度，饲养在5 m×5 m×3 m网箱中，投喂冰冻玉筋鱼60 d，以研究不同规格和密度的圆斑星鲽在网箱中的生长、饲料系数和体色变化情况。整个饲养期间，圆斑星鲽日增重变化在1?77～4?24 g／d，其中大规格鱼的日增重最高（3?49 g／d），当水温为15～20℃时，日增重可达4?24 g／d；饲料系数平均为4?87，其中大规格鱼的最低（4?16），当水温为15～20℃时，饲料系数为3?55；密度对圆斑星鲽网箱养殖的生长情况和饲料系数无显著影响；15～20℃时圆斑星鲽生长快于20～25℃时；网箱养殖圆斑星鲽体色逐渐接近野生鱼体色，无眼侧异常黑化的体色逐渐褪黑变白。研究认为，圆斑星鲽是一种适合网箱养殖的新品种。
재수온15～25℃하，장평균체질량분별위792?27±48?89 g（대）、513?49±39?19 g（중）화185?59±25?51 g （소）적원반성접（Verasper variegatus），안5?5 kg／m2화7?5 kg／m2적밀도，사양재5 m×5 m×3 m망상중，투위빙동옥근어60 d，이연구불동규격화밀도적원반성접재망상중적생장、사료계수화체색변화정황。정개사양기간，원반성접일증중변화재1?77～4?24 g／d，기중대규격어적일증중최고（3?49 g／d），당수온위15～20℃시，일증중가체4?24 g／d；사료계수평균위4?87，기중대규격어적최저（4?16），당수온위15～20℃시，사료계수위3?55；밀도대원반성접망상양식적생장정황화사료계수무현저영향；15～20℃시원반성접생장쾌우20～25℃시；망상양식원반성접체색축점접근야생어체색，무안측이상흑화적체색축점퇴흑변백。연구인위，원반성접시일충괄합망상양식적신품충。
In order to evaluate the growth performance, food conversion ratio and the changes in body color, spotted halibut (Verasper Variegatus) with body weight of 792.27±48.89 (large size), 513.49±39.19 (mid?size) and 185.59±25.51 g (small size) and stocking densities of 5.5 kg/m2 and 7.5 kg/m2 were respectively reared into 18 net cages at water temperature from 15 ℃ to 25 ℃for 60 days. The cage size was uniformly 5 m×5 m×3 m, and the fish were fed with frozen trash fish. The results showed that the daily body weight gain ranged from 1.77 g/d to 4.24 g/d during the rearing period, in which the maximum was that of the large size group (3.49 g/d) and it reached to 4.24 g/d at temperature of 15?20 ℃. The average food conversion ratio was 4.87, in which the minimum was that of large size group (4.16), and at water temperature of 15?20℃, it was 3.55. There was no significant effect of the stocking density on the growth and food conversion ratio for the spotted halibut reared in cages.There were better growth performance and lower food conversion ratio at water temperature of 15?20 ℃ compared with that at water temperature of 20?25 ℃. The body color of the spotted halibut reared in the cages was gradually turned to that of wild spotted halibut, and the color of blind side faded from black to white gradually. It considered that Verasper variegatus is a potential and suitable species for the cage aquaculture.