Spawning pheromone in crown-of-thorns starfish

  title={Spawning pheromone in crown-of-thorns starfish},
  author={Darrell H. Beach and N. J. Hanscomb and Rupert F. G. Ormond},
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… 
Environmental and biological cues for spawning in the crown-of-thorns starfish
It is proposed that environmental cues act as spawning ‘inducers’ by causing the release of hormones in sensitive males, while biological cues from released sperm act asSpawning ‘synchronizers' by triggering a hormonal cascade resulting in gamete shedding by conspecifics.
Presence of spawn-inducing pheromones in two brittle stars (Echinodermata: Ophiuroidea)
The unidirectional induction of males induced by female releasate, suggests high selective pressure of sperm limitation in these 2 species.
Effects of water-borne gametes on the aggregation behavior of Lytechinus variegatus
Urchins never spawned in response to water-borne gametes although most were found to be ripe, and the amount of movement, distance apart, and number and duration of encounters was the same regardless of their reproductive status or the presence/absence of sperm in the water.
Persistent and Transient Populations of the Crown-of-Thorns Starfish, Acanthaster Planci
A simple model of the important processes influencing starfish population stability is developed and particular attention is drawn to the possible importance of persistent breeding populations of A. planci as sources of larvae initiating sequences of secondary outbreaks.
The crown-of-thorns starfish genome as a guide for biocontrol of this coral reef pest
Insight is provided into COTS-specific communication that may guide the generation of peptide mimetics for use on reefs with COTS outbreaks, and on water-borne chemical plumes released from aggregating COTS.
Hybrid crown-of-thorns starfish (Acanthaster planci x A. brevispinus) reared to maturity in the laboratory
A resolution of the status of A. brevispinus is described by in vitro crosses with A. planci which led to the rearing of hybrid starfish which was suggested in verbal discussion among Australian biologists.
Reproductive biology and early life history of the crown-of-thorns starfish
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.
Mating behavior of a brooding Antarctic asteroid, Neosmilaster georgianus
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.
Eyes and negative phototaxis in juvenile crown-of-thorns starfish, Acanthaster species complex
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.


Formation and Breakdown of Aggregations of the Crown-of-Thorns Starfish, Acanthaster planci (L.)
Despite its notoriety, population densities of Acanthaster planci (L.) on most flourishing reefs in the Indo-West Pacific are low, and these starfish were usually separated into small subgroups of up to fifteen animals, associated with favoured species of corals and provided shelter from daylight.
The development and certain points in the adult structure of the starfish asterias rubens, L.
The Asteriadse rank among the Cryptozonia of Sladen (87, xxiii et seq ., xxxiv), since they possess reduced marginal plates, while their papulae or gills are not confined to that part of the
Maturation-inducing substance in starfishes.
  • H. Kanatani
  • Biology, Environmental Science
    International review of cytology
  • 1973