Age and growth of the echinoid Sphaerechinus granularis from the Algerian coast

The growth bands in the plates of the echinoid Spharechinus granularis settled on the Algerian coast were analysed. Two distinct groups of sea urchins were identified with different growth patterns related to the period of recruitment, i.e. spring or autumn. The growth rate of the autumn cohort was...

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Bibliographic Details
Published in:Journal of the Marine Biological Association of the United Kingdom 1999-12, Vol.79 (6), p.1139-1140
Main Authors: Soualili, Dina Lila, Guillou, Monique, Semroud, Rachid
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Biological and medical sciences
Demecology
Fundamental and applied biological sciences. Psychology
Marine
Protozoa. Invertebrata
Sphaerechinus granularis
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Summary:The growth bands in the plates of the echinoid Spharechinus granularis settled on the Algerian coast were analysed. Two distinct groups of sea urchins were identified with different growth patterns related to the period of recruitment, i.e. spring or autumn. The growth rate of the autumn cohort was higher over the year following the first winter after settlement. From the second winter there was little growth difference between the two cohorts. Compared to populations from Atlantic sites, the Algerian population has a lower growth rate and reduced longevity.
ISSN:0025-3154
1469-7769
DOI:10.1017/S0025315499001460