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Dynamique de population, croissance et longévité de la comatule Antedon bifida (Echinodermata, Crinoidea)
Lahaye, M.-Ch.; Bulteel, P.; Jangoux, M. (1990). Dynamique de population, croissance et longévité de la comatule Antedon bifida (Echinodermata, Crinoidea), in: De Ridder, C. et al. (Ed.) Echinoderm Research. Proceedings of the Second European Conference on Echinoderms, Brussels, Belgium, 18-21 September 1989. pp. 177-181
In: De Ridder, C. et al. (Ed.) (1990). Echinoderm Research. Proceedings of the Second European Conference on Echinoderms, Brussels, Belgium, 18-21 September 1989. A.A. Balkema: Rotterdam, Brookfield. ISBN 90-6191-141-9. 343 pp., more

Available in  Authors 
    VLIZ: Open Repository 301043 [ OMA ]
Document type: Conference paper

Keywords
    Population dynamics
    Population functions > Growth
    Properties > Biological properties > Longevity
    Antedon bifida (Pennant, 1777) [WoRMS]
    Marine

Authors  Top 
  • Lahaye, M.-Ch.
  • Bulteel, P.
  • Jangoux, M., more

Abstract
    Antedon bifida is an annual species. Individuals reproduce in the Spring following their year of birth, and most of them (85%) die in the course of the 6 months after reproduction. A. bifida grows continuously with a growth rate of 3, 3 mm per month (arm length) and a pinnule production rate of 0. 2 pinnule per day. The mean arm length of one-year old individuals is 40 mm (male) and 34 mm (female), and the mean number of pinnules per arm is 70 (male ) and 60 (female) (with the 30 most proximal pinnules being genital). One-year old pre mature males have longer and lighter arms than one-year old premature females. Such differences presumably correspond to a difference in reproductive effort in individuals of both sexes.

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