Abstract
Artemia populations were sampledin four hypersaline ecosystems in continentalevaporitic basins from the Argentinean provinces of LaPampa and Buenos Aires. Biometrics of cysts andnauplii were performed. The morphometrics of adultfemales under standard culture conditions, studied bymultivariate discriminant analysis, provided evidencethat these populations belonged to the species A.persimilis; this was further supported bycross-breeding tests established between one of thesepopulations (Salinas Grandes de Hidalgo, province ofLa Pampa) and a population of A. franciscanafrom San Francisco Bay (California, USA), which showedreproductive isolation and barriers to gene flowbetween both populations.
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