IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Morphological, physiological and genetic variability of the ophiuroid Amphipholis squamata from the lagoon system of Oliveri-Tindari (Sicily)
Féral, J.-P.; Villard, A.-M.; Dupont, S.; Mallefet, J. (2001). Morphological, physiological and genetic variability of the ophiuroid Amphipholis squamata from the lagoon system of Oliveri-Tindari (Sicily), in: Barker, M.F. (Ed.) Echinoderms 2000: Proceedings of the 10th international conference, Dunedin, 31 January-2 February 2000. pp. 261-266
In: Barker, M.F. (Ed.) (2001). Echinoderms 2000: Proceedings of the 10th international conference, Dunedin, 31 January-2 February 2000. Swets & Zeitlinger: Lisse. ISBN 90-5809-189-9. 612 pp., more

Available in  Authors 
    VLIZ: Open Repository 53092 [ OMA ]
Document type: Conference paper

Keywords
    Amphipholis squamata (Delle Chiaje, 1828) [WoRMS]; Marine

Authors  Top 
  • Féral, J.-P., more
  • Villard, A.-M.
  • Dupont, S., more
  • Mallefet, J., more

Abstract
    Amphipholis squamata is considered to be the only echinoderm distributed worldwide, excepted in polar regions. This vast distribution area contrasts with a low dispersal potential due to the lack of a pelagic larval stage and an aggregative spatial distribution. Previous works have shown strong inter- and intra-population variability among adult individuals for both phenotype and genotype, although the species seems to be anatomically uniform. The aim of this work was to understand these individual variations at three different levels: (a) the morphological differences characterized by the colour of arms and disc; (b) the physiological variations estimated by luminous capabilities and (c) the genetic variations as revealed by RAPDs. Four populations were sampled in the system of Oliveri-Tindari in Sicily which consists of several lagoons completely isolated from the open sea and from each other for various periods. This system constitutes a suitable model for studying differentiation between closely neighbouring demes. Our results confirm that each colour variety possesses its own luminous capabilities; they also indicate that colour varieties are genetically differentiated.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors