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J. Moll. Stud. (1999), 65, 425-433
© The Malacological Society of London 1999

POPULATION STRUCTURE OF BIOMPHALARIA GLABRATA, INTERMEDIATE SNAIL HOST OF SCHISTOSOMA MANSONI IN GUADELOUPE ISLAND, USING RAPD MARKERS

J. LANGAND1, A. THERON1,, J.P. POINTIER1, B. DELAY2 and J. JOURDANE1

Centre de Biologie et d'Ecologie tropicale et méditerranéenne, UMR 5555, Université de Perpignan, 52 avenue de Villeneuve, 66860 Perpignan Cedex – France; 1 Centre d'Ecologie Fonctionnelle et Evolutive, CNRS, 1919 route de Mende, 34293 Montpellier Cedex 5 – France

Nine populations of the snail Biomphalaria glabrata, sampled in 1992 and in 1994 in the Guadeloupean focus of schistosomiasis, were studied using random amplified polymorphic DNA (RAPD) markers. The detected polymorphism was low with 11 polymorphic markers. A canonical analysis of the genetic polymorphism showed a significant and large differentiation between the nine populations studied in a restricted area of 45 km2. A Mantel t–test indicated a significant correlation between the genetic differentiation and the geographical distance. A significant but smaller differentiation between a northern and southern group was also observed using canonical analysis. A comparison over time has been done.

Corresponding author: A. Théron. Laboratoire de Biologie Animale, UMR 5555 CNRS, Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, Université, 52 Av. de Villeneuve, 66860 Perpignan Cedex, France. Tel: +33 4 68 66 21 83 Fax: +33 4 68 66 22 81 E-mail: theron{at}univ-perp.fr

(Received 26 October 1998; accepted 30 December 1998)


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