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J. Moll. Stud. (1994), 60, 255-262
© The Malacological Society of London 1994

research-article

STARVATION, DESICCATION AND USE OF ALLOSPERM IN THE HERMAPHRODITE FRESHWATER SNAIL BIOMPHALARIA GLABRATA (GASTROPODA: PULMONATA)

MARC VIANEY-LIAUD1 and GEORGES DUSSART2

1Labpratoire de Génétique et Environnement, Institut des Sciences de I'Evolution (URA-CNRS 327), Université de Montpellier II Place Eugéne Bataillon, 34095 Montpellier, France; and 2Ecology Research Group, Canterbury Christ Church College Canterbury, Kent, CTI 1QU, U.K.

Pairs of albino and pigmented snails were used to test the hypothesis that the hermaphrodite freshwater gastropod Biomphalaria glabrata was able to conserve and use allosperm, despite periods of desiccation and starvation. In laboratory experiments, lots of twenty snails were subject to 0, 5, 10, 15 AND 20 days starvation; similar lots of 20 snails were subjected to 0, 2, 4, 6, 8, 10 weeks of desiccation at R.H. 100%. After all periods of starvation and desiccation, albino parents were still producing significant numbers of pigmented offspring, suggesting preferential cross-fertilization using stored allosperm.

(Received 30 September 1993; accepted 23 December 1993)


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