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首页> 外文期刊>Marine biology >Temporal patterns of spawning and hatching in a spawning aggregation of the temperate reef fish Chromis hypsilepis (Pomacentridae)
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Temporal patterns of spawning and hatching in a spawning aggregation of the temperate reef fish Chromis hypsilepis (Pomacentridae)

机译：温带礁鱼Chromis hypsilepis（Pomacentridae）的产卵集合中产卵和孵化的时间模式

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摘要

Descriptions of temporal patterns in the reproduction of damselfishes (family Pomacentridae) and adaptive hypotheses for these patterns are derived mostly from studies of coral reef species. It is unclear whether the types of temporal patterns and the explanatory power of the adaptive hypotheses are applicable to damselfishes of temperate rocky reefs. This study tested hypotheses about the existence of lunar spawning cycles, the diel timing of hatching, and the synchronization of temporal patterns in hatching and tides in the schooling planktivorous damselfish Chromis hypsilepis on a rocky reef in New South Wales, Australia. Reproductive behaviour was observed daily for 223 days between August 2004 and March 2005. C. hypsilepis formed large spawning aggregations of 3,575-33,075 individuals. Spawning occurred at a uniform rate throughout the day on a semi-lunar cycle. The greatest number of spawnings occurred 1 day after the new moon and 1 day before the full moon. The cost to males from brood care was an 85% reduction in their feeding rate. The semi-lunar spawning cycle may be an outcome of the use of the lunar cue to synchronize the aggregation for spawning of widely dispersed individuals and the need for males to recuperate after brooding. Eggs hatched 3-7 h after sunset following a 4.5-day incubation period. This study provides no support for hypotheses that link temporal patterns in hatching with particular tidal regimes believed to facilitate early survival of larvae and their dispersal. The result that hatching occurred over the tidal cycle was due to the rapid off-reef dispersal of larvae from the spawning ground at all stages of the tide. C. hypsilepis is similar to other planktivorous damselfishes in its semi-lunar spawning cycle, cost of brood care, and protracted diel spawning regime. It differs in its lengthy period of hatching and its breeding in spawning aggregations, believed to be rare among demersally spawning fishes.
机译：对雀鲷繁殖的时间模式的描述以及对这些模式的适应性假设主要来自对珊瑚礁物种的研究。尚不清楚时间模式的类型和适应性假设的解释能力是否适用于温带岩石礁的雀鲷。这项研究检验了以下假设：在澳大利亚新南威尔士州的一块礁石上，食卵性雀鲷Chromis hypsilepis在月球产卵周期的存在，孵化的diel时机以及孵化和潮汐中的时间模式同步。在2004年8月至2005年3月之间，每天观察到223天的生殖行为。C. hypsilepis形成了3,575-33,075个人的大产卵聚集体。在半月周期中，产卵全天均匀发生。产卵数量最多的发生在新月后1天和满月前1天。育雏对雄性造成的成本是摄食率降低了85％。半月球产卵周期可能是由于使用月球提示使聚集以同步散布广泛散布的个体而产生的结果，以及雄鱼在育雏后恢复健康的结果。在4.5天的潜伏期后，鸡蛋在日落后3-7小时孵化。这项研究不支持将孵化中的时间模式与特定的潮汐方案联系起来的假设，这些潮汐方案被认为有利于幼虫的早期存活及其扩散。在潮汐周期中发生孵化的结果是由于在潮汐的所有阶段幼虫从产卵场迅速在礁外扩散所致。 C. hypsilepis在半月胎产卵周期，育雏成本和延长的diel产卵期方面与其他浮游的雀鲷相似。它在漫长的孵化阶段和繁殖上的产卵集合方面有所不同，据信在深海产卵鱼类中很少见。

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  • 来源
    《Marine biology》 |2007年第3期|p.1143-1152|共10页
  • 作者

    William Gladstone;

  • 作者单位

    School of Environmental and Life Sciences, University of Newcastle, PO Box 127, Ourimbah, NSW 2258, Australia;

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