体重和温度对黄鳝最大摄食率的影响
EFFECTS OF BODY WEIGHT AND WATER TEMPERATURE ON THE MAXIMUM RATION LEVELS OF MONOPTERUS ALBUS
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摘要: 室内研究了体重和温度对黄鳝最大摄食率的影响。在水温相同(20℃)的条件下,随着体重的增加(4.77-144.65g),黄鳝最大摄食量增加,但最大摄食率呈下降的趋势,两者与体重的相关关系分别为Cmax(g/d·per fish)=5.86×10-2W0.46和RLmax(J/g·d)=611.74W-0.54。初始体重(13-21g)对黄鳝最大摄食率没有显著影响(p>0.05),水温(11-38℃)对黄鳝最大摄食率的影响非常明显(pRLmax(J/g·d)=418.56-80.78t+4.73t2-0.074t3。黄鳝的最佳食欲温度为30.8℃,此时最大摄食率为255.46J/g.d。试验发现,南京地区的黄鳝最低摄食温度为8℃。采用方程RLmax(J/g·d)=(1526.49-294.60t+17.25t2-0.27t3)W-0.54能够预测黄鳝在不同体重和不同温度条件下的最大摄食率。Abstract: The paper studied the effects of body weight and temperature on the maximum ration levels of ricefield eels by food-balance method indoors.At temperature of 20℃,the maximum food consumption increased but the maximum ration levels decreased along with the increase of body weight from 4.77 to 144.65g.The correlation between the maximum food consumption and body weight(g) was Cmax(g/d·per fish)=5.86×10-2W0.46,and the correlation between the maximum ration levels(J/g·d) and body weight was RLmax(J/g·d)=611.74W-0.54.Temperature(11-38℃) influenced RLmax significantly while the initial body weight of 13-21g had no significant effect on RLmax,and the regression equation between RLmaxand temperature(℃) was RLmax(J/g·d)=418.56-80.78t+4.73t2-0.074t3.The optional temperature was 30.8℃ at which the ricefield eel had the maximum appetite of 255.46 J/g.d.At the same time,the lowest temperature of food intake and lethal temperature of ricefield eels in Nanjing was 8℃ and 40℃ respectively,which was observed for the first time.By the equation of RLmax(J/g·d)=(1526.49-294.60t+17.25t2-0.27t3)W-0.54,the maximum ration levels of ricefield eels imposed on different body weights and temperatures could be estimated.
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Keywords:
- Monopterus albus /
- Body weight /
- Temperature /
- Maxmium ration levels(RLmax) /
- Weight exponent
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