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

What is the smallest distance of genetic structuring in the brooding ophiuroid Amphipholis squamata from the Western Mediterranean?
Féral, J.P.; Barré, N.; Villard, A.-M.; Chenuil, A. (2003). What is the smallest distance of genetic structuring in the brooding ophiuroid Amphipholis squamata from the Western Mediterranean?, in: Féral, J.-P. et al. Echinoderm Research 2001: proceedings of the 6th European Conference on Echinoderm Research, Banyuls-sur-mer, 3-7 September 2001. pp. 23-27
In: Féral, J.-P.; David, B. (2003). Echinoderm Research 2001: proceedings of the 6th European Conference on Echinoderm Research, Banyuls-sur-mer, 3-7 September 2001. Swets and Zeitlinger: Lisse. ISBN 90-5809-528-2. XVI, 337 pp., more

Available in  Authors 
Document type: Conference paper

Keywords
    Biological fertilization; Brood care; Genomes; Amphipholis squamata (Delle Chiaje, 1828) [WoRMS]; MED, Western Mediterranean [Marine Regions]; Marine

Authors  Top 
  • Féral, J.P., more
  • Barré, N.
  • Villard, A.-M.
  • Chenuil, A.

Abstract
    Our goal was to assess the smallest scale of genetic differentiation in a minute ophiuroid considered as a cosmopolitan species, which was already shown to be differentiated at a relatively small scale (about 1 km) in the Mediterranean Sea-Medes Islands. Amphipholis squamata is hermaphroditic and broods its young. Both auto- and allo-fertilization occur. Morphs of several colors exist, and the species is bioluminescent. RAPD markers were used to assess the genetic structuring at a very small scale (a 90 X 90 cm square consisting of 3 X 3 adjacent quadrates of 30 cm side length each). Very strong genetic differentiation was found between quadrates, it was not correlated to the distance between quadrates. An equally strong differentiation was observed between color morphs (pooling individuals of the 9 quadrates). To check if the observed differentiation between quadrates was due to genetic differentiation between color morphs, associated with heterogeneous distribution of "colors" among quadrates, we tested for differentiation between quadrates, using individuals of two morphs taken one by one, namely the "green" morph, and the "gray" morph. There was still a strong differentiation between quadrates. No relationships can be deduced between genetic entities and color morphs.

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