Diel Activity Rhythms in the Nocturnal, Bottom-Dwelling Sharks, Heterodontus francisci and Cephaloscyllium ventriosum
Diel Activity Rhythms in the Nocturnal, Bottom-Dwelling Sharks, Heterodontus francisci and Cephaloscyllium ventriosum
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夜间活动的底栖鲨鱼、Heterodontus francisci 和 Cephaloscyllium ventriosum 的昼夜活动节律
DOI：
10.2307/1442315
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发表时间：
1970
期刊：
影响因子：
2.6
通讯作者：
Richard H. Johnson
中科院分区：
文献类型：
--
作者：
D. Nelson;Richard H. Johnson
在自然环境的水下观察时，角鲨（Heterodontus francisci）和膨胀鲨（Cephaloscyllium ventriosum）表现出独特的夜间活动模式。游泳活动在黄昏后不久开始，一直持续到黎明，此后就很少有活动了。角鲨在固定和移动 LD 12:12（12 小时光照 - 12 小时黑暗）模式下的实验室记录表明存在外源节律，其活动开始直接受黑暗开始控制。角鲨在持续黑暗中表现出高水平的非周期性活动，在持续光照下表现出低水平的非周期性活动。在固定 LD 12:12 模式下，膨胀鲨的活动似乎是在黑暗开始之前开始的，但在变化的 LD 模式（1 小时后/天）中，活动稍微先于黑暗。这种膨胀的鲨鱼表现出一种内源性（即昼夜节律）节律，即在持续黑暗中缩短周期（提前相位漂移），在恒定光照下延长周期（延迟相位漂移）。
The horn shark, Heterodontus francisci, and the swell shark, Cephaloscyllium ventriosum, exhibited distinct nocturnal activity patterns when observed underwater in the natural environment. Swimming activity began shortly after dusk and continued until dawn, after which very little activity was seen. Laboratory records for the horn shark under fixed and shifting LD 12:12 (12 hr light-12 hr dark) regimes indicated an exogenous rhythm, with an activity onset directly controlled by the onset of darkness. Horn sharks showed a high level of aperiodic activity in constant darkness and a low level of aperiodic activity in constant light. Activity in a swell shark appeared initiated by the onset of darkness during fixed LD 12:12 regimes, but slightly preceded darkness during a shifting (1 hr later/day) LD regime. This swell shark exhibited an endogenous (i.e., circadian) rhythm of shortened period (advancing phase drift) in constant darkness, and lengthened period (delaying phase drift) in constant light.