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The Growth Characteristics of Juvenile Oratosquilla oratoria in Pond Culture
Zhang Nianguo, Pan Guiping, Zhou Wenyu
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=0.016L2.879 (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
Oratosquilla oratoria / pond culture / growth characteristics / water temperature / relative fatness / growth pattern {{custom_keyword}} /
表1 不同实验时间段当年口虾蛄的生长变化 |
项目 | 日龄 | |||||
---|---|---|---|---|---|---|
30 d | 50 d | 70 d | 90 d | 110 d | 130 d | |
体长/cm | 8.20 ± 0.45a | 8.79 ± 0.66b | 9.43 ± 0.68c | 10.51 ± 0.66d | 10.81 ± 0.47d | 11.79 ± 0.67e |
头胸甲长/cm | 1.82 ± 0.12a | 2.00 ± 0.16b | 2.13 ± 0.15c | 2.33 ± 0.15d | 2.43 ± 0.09e | 2.65 ± 0.16f |
尾节长/cm | 1.53 ± 0.12a | 1.58 ± 0.19a | 1.75 ± 0.15b | 1.97 ± 0.16c | 2.05 ± 0.13c | 2.23 ± 0.18d |
腹宽/cm | 1.34 ± 0.09a | 1.51 ± 0.14b | 1.61 ± 0.10c | 1.69 ± 0.11d | 1.73 ± 0.09d | 1.92 ± 0.12e |
体重/g | 7.14 ± 1.17a | 8.49 ± 1.73a | 10.38 ± 2.15b | 14.00 ± 3.00c | 15.39 ± 2.02c | 20.54 ± 3.44d |
日均增长量 | - | 0.030 | 0.032 | 0.054 | 0.015 | 0.049 |
日均增重量 | - | 0.068 | 0.095 | 0.181 | 0.070 | 0.258 |
体长瞬时增长率/% | - | 0.35 | 0.35 | 0.54 | 0.14 | 0.43 |
体重瞬时增长率/% | - | 0.87 | 1.00 | 1.50 | 0.47 | 1.44 |
全长相对增长率/% | - | 7.20 | 7.28 | 11.45 | 2.85 | 9.07 |
体重相对增长率/% | - | 18.91 | 22.26 | 34.87 | 9.93 | 33.46 |
注:同行数据肩标不同字母表示差异显著(P<0.05),相同字母表示差异不显著(P>0.05)。 |
表2 不同日龄的口虾蛄体长与体重关系(W=aLb)的拟合参数值 |
日龄/d | a | b | R2 | F |
---|---|---|---|---|
30 | 0.022 | 2.743 | 0.864 | 178.055 |
50 | 0.024 | 2.685 | 0.911 | 164.345 |
70 | 0.018 | 2.815 | 0.952 | 334.384 |
90 | 0.005 | 3.341 | 0.964 | 351.173 |
110 | 0.016 | 2.873 | 0.837 | 123.087 |
130 | 0.027 | 2.682 | 0.799 | 107.629 |
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