Age and Growth of Anthocidaris Crassispina (Echinodermata: Echinoidea) in Hong Kong
Abstract:Age and growth of Anthocidaris crassispina at Hong Kong were investigated by counting and measuring growth rings on genital plates. Growth profiles were computed using a nonlinear regression technique. A. crassispina has a lifespan of about 9 years. Juveniles settle at a size of between 0.42 and 0.69 mm test diameter and maximum growth rates occur in the years 2 to 4 (14.3–15.7 mm·year–1). The age structure of natural populations is influenced by fishing mortality. In harvested populations on the east and south coasts, urchins were seldom over 5 years old.
Document Type: Research Article
Publication date: July 1, 1990
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