Observations on future sea level changes in the Venice lagoon |
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Authors: | Davide Zanchettin Pietro Traverso Mario Tomasino |
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Institution: | (1) Instituto de Acuicultura de Torre de la Sal (CSIC), 12595 Ribera de Cabanes (Castellón), Spain;(2) Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina |
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Abstract: | The identification of the environmental conditions inducing different ecophysiological responses in the different strains
and populations of the brine shrimp Artemia should improve the understanding of their biogeographic distribution. Nauplii from two Argentinean brine shrimp populations,
Artemia persimilis from Salinas Grandes de Hidalgo (province of La Pampa) and Artemia franciscana from Laguna Mar Chiquita (province of Cordoba), were grown up until adulthood at different salinities (30, 60, 90, 120 gL−1) and temperatures (12, 21, 28°C). The aim was to assess the effects of these different conditions on prereproductive life
span and reproductive traits. Results evidenced that at 21 and 28°C, at any salinity, A. franciscana from Laguna Mar Chiquita attained higher survival and fecundity, after a shorter prereproductive period, than A. persimilis from Salinas Grandes de Hidalgo. These data support that A. franciscana, considered a superspecies, exhibits higher phenotypic plasticity than A. persimilis, and that A. persimilis is better adapted to lower temperatures than A. franciscana. These differences in temperature and salinity tolerance could explain the present distribution of these two species in the
South Cone in South America.
Handling Editor: J. Melack |
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Keywords: | Artemia persimilis Artemia franciscana Argentina Temperature Salinity Survival Fecundity Growth Body length Prereproductive period |
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