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Growth of Juvenile Acanthaster planci (L.) in the Laboratory

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Title:Growth of Juvenile Acanthaster planci (L.) in the Laboratory
Authors:Yamaguchi, Masashi
Date Issued:Apr 1974
Publisher:University of Hawai'i Press
Citation:Yamaguchi M. 1974. Growth of juvenile Acanthaster planci (L.) in the laboratory. Pac Sci 28(2): 123-138.
Abstract:Seven juvenile Acanthaster planci were reared from fertilized eggs to
sexual maturity in 18 to 21 months in the laboratory. Four-month-old juveniles,
about 8 mm in total diameter, began to transform into coral predators from the
prior herbivore stage that fed on encrusting coralline algae. The transition period
lasted for about 1 month. Many juveniles were injured by coral polyps, which had
been offered as food, shortly after the transitional period. Except for severely
injured ones, all the coral-feeding juveniles grew steadily after recovering from the
injuries and, when the animals were well fed, their growth curve was sigmoid.
Mean growth coefficient for the early coral-feeding juveniles, growing exponentially,
was nearly half that of the previous algae-feeding stage, and the coefficient
value reduced rapidly as the juvenile grew near to maturity. Acropora nasuta
and Pocillopora damicornis both sustained full growth of juveniles. However, the
juvenile Acanthaster killed about twice as much coral mass of Acropora nasuta
as of Pocillopora damicornis to gain the same amount of weight.
Appears in Collections: Pacific Science Volume 28, Number 2, 1974

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