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海洋科学  2005 

不同光源及光照时间对凡纳滨对虾生长的影响

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Keywords: 凡纳滨对虾(Litopenaeus,vannamei),生长,光源,光照时间

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Abstract:

以黑暗条件作为对照,研究了白炽灯、日光灯、金卤灯作为照明光源及不同光照时间对凡纳滨对虾(Litopenaeusvannamei)生长的影响。实验对虾初始平均质量为2.108g±0.036g(均值±标准误),投喂的饲料为海跃牌全价人工配合饲料,实验持续50d。结果表明:(1)凡纳滨对虾在金卤灯照明的条件下生长最快(P0.05)。其中,金卤灯照明条件下凡纳滨对虾的特定生长率比日光灯连续照明时要快55.89%。(2)具昼夜节律日光灯、15W白炽灯照明及15W连续照明的条件下,凡纳滨对虾的摄食率与黑暗对照组无显著差异(P>0.05),在日光灯连续照明时其摄食率显著低于黑暗对照组(P0.05),但以金卤灯照明条件下食物转化率最高。(4)研究表明,凡纳滨对虾在金卤灯照明时具有较高的生长速度缘于其较高的摄食率和食物转化率;在日光灯持续照明的条件下,凡纳滨对虾的摄食率和食物转化率均较低,因而此条件下凡纳滨对虾生长得较慢。因此,进行对虾室内养殖时,金卤灯是首先的照明光源,而日光灯作为照明光源是不适宜的。

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