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Interspecific stimulation of parthenogenesis in Schistosoma intercalatum and S. mansoni

Published online by Cambridge University Press:  05 June 2009

L.A. Tchuem Tchuenté ,
D. Imbert-Establet ,
V.R. Southgate  and
J. Jourdane
L.A. Tchuem Tchuenté
Affiliation:
Laboratoire de Biologie Animale (URA CNRS 698), Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, Université, Avenue de Villeneuve, 66860 Perpignan Cedex, France
D. Imbert-Establet
Affiliation:
Laboratoire de Biologie Animale (URA CNRS 698), Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, Université, Avenue de Villeneuve, 66860 Perpignan Cedex, France
V.R. Southgate
Affiliation:
The Natural History Museum, Cromwell Road, South Kensington, London, SW7 5BD, UK
J. Jourdane
Affiliation:
Laboratoire de Biologie Animale (URA CNRS 698), Centre de Biologie et d'Ecologie Tropicale et Méditerranéenne, Université, Avenue de Villeneuve, 66860 Perpignan Cedex, France
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Abstract

Experimental studies of mating behaviour of Schistosoma intercalatum and Schistosoma mansoni in mixed infections in mice showed that in simultaneous infections, without the possibility of choice of mate, heterologous pairing occurs readily. The paired females reach sexual maturity, are inseminated and lay parthenogenetic eggs. Miracidia originating from the S. mansoni male × S. intercalatum female are non infective to either Biomphalaria glabrata or Bulinus forskalii, whereas those from the reverse cross show a very low infectivity to only B. glabrata. The resulting haploid male cercariae also show a very low infectivity to mice (1.1%) and consequently only a very small number of adult worms develop. It appears from this study, on chromosomal and electrophoretic evidence, that generative (haploid) parthenogenesis occurs in S. mansoni females paired with S. intercalatum males.

Type
Research Papers
Information
Journal of Helminthology , Volume 68 , Issue 2 , June 1994 , pp. 167 - 173
Copyright
Copyright © Cambridge University Press 1994

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