3种不同规格虎斑乌贼苗种的摄食、生长及存活的比较

为探究苗种规格对虎斑乌贼(Sepia pharaonis)养殖效果的影响, 进行了放养3种不同规格乌贼苗种(胴长分别为(4.09±0.15)、(5.25±0.48)和(6.16±0.19)cm)的养殖实验. 结果表明 不同规格乌贼苗种的摄食量均波动上升, 饵料系数随养殖时间逐渐降低, 由8.00±1.01降至3.74±0.35. 乌贼苗种的特定生长率先增加, 在胴长左右时达到峰值, 后减少并稳定至4%左右. 3种规格乌贼苗种养殖30d后的存活率分别为(88.50±0.88)%、(92.00±0.60)%、(93.83±0.34)%. 大规格乌贼苗种的日均增重量、存活率显著(P<0.05)高于小规格乌贼苗种. 综上所述, 在虎斑乌贼养殖中苗种放养规格以胴长左右为宜.

Comparison of feeding,growth and survival rate of three different sizes of Sepia pharaonis juvenile

The aim of this study was to determine the effect of juvenile size on the culture of Sepia pharaonic. A single factor test was used to analyze the data. A total of three groups with different sizes (mantle length (4.09±0.15), (5.25±0.48) and (6.16±0.19)cm) were used in the current experiment. The results showed that the food intake increased in 3 size groups and the feed conversion ratio decreased from 8.00±1.01 to 3.74±0.35 with culturing. The growth rate of cuttlefish increased first, reaching the maximum mantle length of approximately and subsequently reduced by 4%. The survival of juvenile cuttlefish for 3 size groups after having been cultured for 30days were (88.50±0.88)%, (92.00±0.60)%, and (93.83±0.34)% respectively. The average daily weight gain and survival of large-size cuttlefish were significantly greater (P<0.05) than those of the small-size group. These results suggested that the optimum mantle length of juvenile would be , in order to obtain a rapid growth and high survival of S. pharaonis during culture.