Diel timing of molting and metamorphosis of Panulirus japonicus phyllosoma larvae under laboratory conditions
Diel timing of molting and metamorphosis of Panulirus japonicus phyllosoma larvae under laboratory conditions
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实验室条件下日本龙虾蜕皮变态的昼夜时间
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
T. Yamakawa
中科院分区：
文献类型：
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作者：
H. Matsuda;T. Takenouchi;T. Yamakawa
在实验室条件下，对大叶龙虾幼虾的蜕皮和变态时间进行了监测。在自然光暗周期下培养的仔鱼，除孵化后的一小段时间外，在日出前后约1.0 h内同步蜕皮，蜕皮时间随日出时间而变化。当引入三个人工光暗周期时，幼虫在光照开始时蜕皮，而不管光暗周期如何。在突然变化的情况下，在开始或结束的照明，蜕皮调节的内源性节奏。光照的开始对蜕皮时间的影响大于光照的结束，这表明日出可能是蜕皮节律中阶段设置的关键信号。在自然光暗周期下，在日落前0.4 h和日落后1.2 h内发生变态至青果期，并通过调节光照结束人为改变变态的时间。
: The timing of molting and metamorphosis was monitored for Panulirus japonicus phyllosoma larvae cultured in the laboratory. Larvae cultured under natural light–dark cycle molted synchronously within approximately 1.0 h before and after sunrise, except for a short period after hatching; the timing of molting changed with time of sunrise. When three artificial light–dark cycles were introduced, larvae molted around the start of lighting, irrespective of the light–dark cycles. In the event of a sudden change in the start or end of lighting, molting was regulated by an endogenous rhythm. The start of lighting had a greater impact on the timing of molting than the end of lighting, suggesting that sunrise is probably the critical signal for phase-setting in molting rhythm. Metamorphosis to the puerulus stage occurred within 0.4 h before and 1.2 h after sunset under a natural light–dark cycle, and the timing of metamorphosis was also changed artificially by regulating the end of lighting.