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彭银辉,黄国强,李洁,唐夏.餐后温度对褐牙鲆幼鱼生长的影响[J].广西科学,2013,20(3):219-225. [点击复制]
- PENG Yin-hui,HUANG Guo-qiang,LI Jie,TANG Xia.Effects of Temperature on the Growth of Juvenile Brown Flounder Paralichthys olivaceus[J].Guangxi Sciences,2013,20(3):219-225. [点击复制]
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| 餐后温度对褐牙鲆幼鱼生长的影响 |
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彭银辉1, 黄国强1,2, 李洁2, 唐夏2
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| (1.广西海洋生物技术重点实验室, 广西海洋研究所, 广西北海 536000;2.中国海洋大学水产学院, 山东青岛 266003) |
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| 摘要: |
| 为了研究餐后温度对褐牙鲆(Paralichthys olivaceus)幼鱼生长的影响,选择平均体重33~34 g的幼鱼为研究对象,设置摄食时温度为20℃,餐后温度分别为14℃(T14)、17℃(T17)、20℃(T20)、23℃(T23)、26℃(T26),养殖30 d后,考察褐牙鲆的生长速度、摄食量、消化率、饲料转化效率及其能量分配情况。结果显示,T17、T20、T23处理的幼鱼生长速度比T14和T26处理快;T14处理的幼鱼摄食量明显比其它处理少,T20、T23处理的幼鱼摄食量明显高于其它处理;随餐后温度由14℃提高到26℃,幼鱼能量消化率显著提高,饲料转化效率下降,摄食能分配于生长的能量比例逐渐下降,排粪损失的能量比例逐渐下降,代谢能的比例逐渐增加;单位体重鱼体日摄食能随着餐后温度的提高先上升后下降,生长能和排粪能也呈现类似趋势;代谢能随餐后温度的提高明显上升,排泄能略有上升。这表明温度主要通过改变摄食量来影响褐牙鲆幼鱼的生长,与恒温相比,餐后温度没有对褐牙鲆产生促生长作用,较低的餐后温度能够降低幼鱼的能量代谢率,使更多的能量分配于生长。 |
| 关键词: 褐牙鲆 餐后温度 生长 能量分配 |
| DOI： |
| 投稿时间：2012-12-08修订日期：2013-02-21 |
| 基金项目: |
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| Effects of Temperature on the Growth of Juvenile Brown Flounder Paralichthys olivaceus |
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PENG Yin-hui1, HUANG Guo-qiang1,2, LI Jie2, TANG Xia2
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| (1.Guangxi Key Laboratory of Marine Biotechnology, Guangxi Institute of Oceanology, Beihai, Guangxi, 536000, China;2.Fisheries College, Ocean University of China, Qingdao, Shandong, 266003, China) |
| Abstract: |
| In order to investigate the effects of postprandial temperature on the growth of juvenile brown flounder (Paralichthys olivaceus)(33~34g), the feeding temperature was 20℃ and the postprandial rearing temperatures were 14℃ (T14), 17℃ (T17), 20℃ (T20), 23℃ (T23), and 26℃ (T26), respectively.After the 30 days rearing experiment, The growth, feeding amount digestive rate, feed conversion efficiency and allocation of ingested energy of brown flounder were investigated.The juveniles grew faster in T17, T20, and T23 than in T14 and T26.The feed ingestion of the results showed that the juveniles in T14 was significantly less than other treatments whereas the treatment of T20 and T23 ingested more feed than others.As the postprandial temperature increased from 14℃ to 26℃, the digestive rate of energy rose significantly and the feed conversion efficiency of energy decreased.The portion of energy allocated to growth and lost in feces decreased as postprandial temperature increased.On the contrary, the energy of metabolism increased.Daily energy ingestion of unit body weight (Ce, J/(g·d-1)) presented as ascending trend and then decreased as postprandial temperature increased from 14℃ to 26℃.Similar trend appeared in daily growth energy of unit body weight (Ge, J/(g·d-1)) and lost in feces (Fe, J/(g·d-1)).Daily energy metabolism of unit body weight (Re, J/(g·d-1)) increased significantly and daily energy of unit body weight lost in excretion (Ue, J/(g·d-1)) increased slightly as postprandial temperature increased.All these indicated that the postprandial temperature affected the growth of young fish mainly by influencing feeding.In compare to the constant temperature (T20), postprandial temperature could not accelerate the growth of brown flounder, but low postprandial temperature could reduce the metabolism rate of fish and consequently more energy was used to growth. |
| Key words: brown flounder postprandial temperature growth energy allocation |
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