Bisexual populations of the brine shrimpArtemia in Sète-Villeroy and Villeneuve Saltworks (Languedoc,France) |
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| Authors: | Alain Thiéry Florence Robert |
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| Institution: | (1) Laboratoire de Biologie animale-Hydrobiologie, Faculté des Sciences, 33, rue Louis Pasteur, 84000 Avignon, France;(2) Laboratoire de Parasitologie Comparée, U.A.-CNRS 691, Université des Sciences et Techniques de Languedoc, Montpellier II, Place Eugène Bataillon, 34095 Montpellier Cedex, France |
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| Abstract: | So far,Artemia populations in solar saltponds of southern France have been considered as belonging to the Old World parthenogenetic strain.
However, two populations sampled monthly in abandoned salinas of Sète-Villeroy and Villeneuve appear to be bisexual throughout
their life-cycle. Their sex ratio regularly fluctuates near equilibrium, and mating, present throughout life, is very common
in early winter. Morphological characteristics, particularly the male frontal knobs structure, are discussed in relation to
the diploid bisexual Mediterranean strain,Artemia tunisiana, which is distributed around the Mediterranean basin. The existence of sexual populations is discussed in regard to variation
in environmental conditions in abandoned salinas. |
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| Keywords: | Artemia bisexual population brine shrimp coastal saltworks life history Mediterranean strain |
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