Spawning pheromone in crown-of-thorns starfish

@article{Beach1975SpawningPI,
  title={Spawning pheromone in crown-of-thorns starfish},
  author={Darrell H. Beach and N. J. Hanscomb and Rupert F. G. Ormond},
  journal={Nature},
  year={1975},
  volume={254},
  pages={135-136}
}
LARGE aggregations of the crown-of-thorns starfish Acanthaster planci L have destroyed a high proportion of the coral on certain Indo-Pacific reefs. We report that gamete release by one A. planci induces other ripe starfish to spawn; similar behaviour has been observed in certain other echinoderms1,2. During natural spawning a pheromone is released from the gonad, which synchronises spawning in neighbouring animals and also induces starfish movement towards the spawning individual. Using a Y… 
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This chapter reviews the unique features of A. planci reproductive biology and early life history that make it predisposed to population fluctuations and discusses factors that regulate gametogenesis, fecundity, spawning, fertilization, larval development, and post-settlement survival.
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Spawning behavior and male-female superposition of Neosmilaster georgianus, a common brooding asteroid, were observed both in the field and the laboratory at Palmer Station, Antarctica, during the austral spring of 1991, marking the first reported instance of aggregative spawning in an Antarctic echinoderm.
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The results show that juveniles are able to use their eyes to locate their habitat: the coral reef, however, their putatively lower spatial resolution would make this visual task more difficult than for the adults.
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