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1995-04-11 - Colloque/Présentation - poster - Anglais - 1 page(s)

Grosjean Philippe , Spirlet Christine, Jangoux Michel , "Establishment and presumed causes of the trimodal distribution commonly observed in cultivated populations of juvenile Paracentrotus lividus" in 4th European Echinoderms Colloquium, London, United Kingdom, 1995

  • Codes CREF : Aquiculture (DI3636)
  • Unités de recherche UMONS : Ecologie numérique des milieux aquatiques (S807)
  • Instituts UMONS : Institut des Biosciences (Biosciences)
Texte intégral :

Abstract(s) :

(Anglais) Multimodal distribution (i.e.: few individuals growing very fast and few individuals growing very slowly among an originally homogeneous group of sea-urchins P. lividus of the same strain) is often observed in controlled cultivation. The splitting of this group into homogeneous size-classed subgroups induces an increased growth of the smaller individuals that achieve the same size than the others in 3 months. This indicates that the smaller animals are not genetically less productive and suggests they are inhibited in their growth due to some environmental constraints.