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Growth and age determination of the tropical Australian cubozoan Chiropsalmus sp

  • M. Gordon
  • C. Hatcher
  • J. Seymour
Part of the Developments in Hydrobiology book series (DIHY, volume 178)

Chiropsalmus sp. medusae collected in this study ranged from 3 to 71 mm diagonal bell width and displayed growth best described by the following equation: size (mm) = 74.9 × exp (–exp(0.041 (time since metamorphosis (day) –135.6674))). Growth rates of up to 7 mm week–1 increase in diagonal bell width are theoretically possible, with animals able to reach sexual maturity in approximately 70 days. Correlation of the number of rings on the statoliths with the predicted age of the individual from the field produced a relationship that indicates the growth rings are laid down daily and as such could be used to infer age of the medusae. Over the 1998–1999 season, there were four influxes of juvenile cohorts, each occurring approximately 14 days after a major rainfall event.

Key words: Cubozoa, Gompertz growth curve, statolith

Keywords

Sexual Maturity Growth Ring Marine Ecology Progress Series Growth Rate Estimate Gompertz Growth 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • M. Gordon
    • 1
  • C. Hatcher
    • 1
  • J. Seymour
    • 1
  1. 1.School of Tropical BiologyJames Cook UniversityCairnsAustralia

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