池塘养殖条件下当年口虾蛄生长特性的研究

为了了解口虾蛄在池塘养殖条件下的生长规律,并为其规模化生产提供科学依据。在水温15℃~31℃条件下,通过测量体重、体长等指标,对当年口虾蛄的生长特性进行了研究。结果表明:（1）30日龄口虾蛄经100天培育后,体长从(8.20 ± 0.45)cm增至(11.79 ± 0.67)cm,日均增长0.036 cm,体重从(7.14 ± 1.17)g增至(20.54 ± 3.44)g,日均增重0.134 g。（2）当年口虾蛄的体重与体长的拟合方程为W=0.016L^2.879(R²=0.978),其b值接近于3;体长、体重与养殖日龄的最佳方程均为指数函数。（3）当年口虾蛄的肥满度在30日龄时最高,90日龄最低,肥满度与养殖水温没有明显相关关系;在水温23℃以上时,口虾蛄的瞬时增长率、瞬时增重率指标逐渐升高并在90日龄达到最大值。综上所述,口虾蛄在池塘养殖条件下生长效果良好,其体长与体重的生长基本同步,适宜进行规模化人工养殖。

The Growth Characteristics of Juvenile Oratosquilla oratoria in Pond Culture

To understand the growth rule of juvenile Oratosquilla oratoria in pond culture, and provide a scientific basis for large scale production, an experiment was conducted to study the growth characteristics of juvenile O. oratoria at 15℃-31℃ by measuring the body weight and body length. The results showed that: (1) the 30-day-old juvenile O. oratoria reached an average body length of 11.79 ± 0.67 cm after 100 days rearing from 8.20 ± 0.45 cm, which increased by 0.036 cm per day on average, the average body weight increased from 7.14±1.17 g to 20.54 ± 3.44 g, and gained at the rate of 0.134 g per day on average; (2)the linear relationship of body length and body weight in juvenile O. oratoria was W=0.016L^2.879 (R²=0.978), and the b value was close to 3; exponential functions were the optimal model to describe the relationship of body length, body weight and culture times of juvenile O.oratoria; (3) the relative fatness was the highest in 30-day-old and the lowest in 90-day-old, there was no distinct relationship between relative fatness and water temperature of juvenile O. oratoria; the instantaneous growth rates of juvenile O. oratoria were affected by the change of water temperature above 23℃, they were increased with temperature increasing and reached the maximum in 90-day-old. To sum up, O. oratoria has strong adaptability under artificial culture condition, its growth of body weight is the same as that of the body length, and is suitable for artificial culture on large scale