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Photoperiodic activity pattern in the brittlestar Amphiura filiformis

机译:脆星丝状双翅目的光周期活动模式

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摘要

Diurnal activity pattern of suspension-feeding "arms" of the infaunal brittle star Amphiura filiformiswas recorded in situ by time-lapse photography at 30 m water depth in the Gullmarsfjord, west Sweden. Activity was clearly related to the photoperiod with high activity at night and low or no activity during daytime. In laboratory experiments, the activity of the arms of A. filiformis changed in relation to new manipulated photoperiods, demonstrating exogenous circadian rhythms. The time difference for the greatest change in activity of the arms between control and treatment was correlated with the photoperiodicity. The recently found microlenses and associated neural photoreceptors in ophiuroids may apply also to A. filiformis. The trade-off between efficient feeding and predator avoidance is discussed.
机译:在瑞典西部的古尔马斯峡湾,在30 m水深处通过延时摄影原位记录了臭名昭著的脆性恒星Amphiura filiformis的悬浮喂养“臂”的日活动模式。活性明显与光周期有关,夜间有高活性,而白天则无活性或无活性。在实验室实验中,与新操纵的光周期有关,丝状曲霉臂的活动发生了变化,表明了外源性昼夜节律。对照和治疗之间手臂活动最大变化的时间差与光周期相关。最近发现的类镜体中的微透镜和相关的神经感光细胞也可能适用于丝状线虫。讨论了有效喂养和避免捕食者之间的权衡。

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  • 来源
    《Marine biology》 |2004年第4期|p.651-656|共6页
  • 作者

    R. Rosenberg; L. Lundberg;

  • 作者单位

    Department of Marine Ecology, Goeteborg University, Kristineberg Marine Research Station, 450 34 Fiskebaeckskil, Sweden;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境生物学;
  • 关键词

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