Interspecific variation in the spawning time of labrid fish on a fringing reef at Iriomote Island, Okinawa

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• 作者：Tetsuo Kuwamura ; Shohei Suzuki ; Tatsuru Kadota
• 关键词：Pelagic eggs ; Spawning time ; Phylogeny ; Interspecific interference ; Labridae
• 刊名：Ichthyological Research
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：63
• 期：4
• 页码：460-469
• 全文大小：526 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Zoology
  Ecology
  Animal Systematics/Taxonomy/ Biogeography
  Marine Ecology
  
• 出版者：Springer Japan
• ISSN：1616-3915
• 卷排序：63

文摘

The diel timing of pelagic spawning in reef fish has been discussed in the context of adaptation to local environmental conditions. However, interspecific variations in spawning time are also known to occur at a single locality. The family Labridae, composed of wrasses and parrotfishes, is one of the largest groups of fish on coral reefs. We investigated the spawning behavior and interspecific interactions of 30 species of wrasse at the same spawning site, a reef edge off Iriomote Island, Okinawa, Japan, where we previously studied 13 species of parrotfish. Six patterns in spawning time, related to time of day and high tide, were distinguished at the spawning site. Most wrasses spawned around high tide in the daytime and a few spawned at dusk only, whereas most parrotfishes spawned in the early morning, and some species exhibited intermediate (mixed) patterns. The interspecific variation in spawning time can be explained at least in part by phylogenetic constraints. Physiological constraints on spawning time are also discussed in relation to the different external cues that activate oocyte maturation.