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Bioecology of the fiddler crab Uca uruguayensis and the burrowing crab Chasmagnathus granulatus (Decapoda, Brachyura) in the Refugio de Vida Silvestre Bahía Samborombón, Argentina

The aim of the present work is to analyse the most relevant aspects of the life cycles of Chasmagnathus granulatus and Uca uruguayensis: their abundance, size distribution and sex ratio in order to be used for make management purposes.
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Dynamics of pleustonic ostracod populations in small ponds on the Island of Martín García (Río de la Plata, Argentina)

The population changes of ostracods living in pleustonic environments of small freshwater bodies on Martín García Island are analyzed to clarify the observed negative correlation between floating vegetation dry weight and ostracod density and the possible differential thermal preference of the two species studied.
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FRESHWATER GASTROPODA FROM ARGENTINA: SPECIES RICHNESS, DISTRIBUTION PATTERNS, AND AN EVALUATION OF ENDANGERED SPECIES

In Argentina, the north-south decline species pattern could be explained through Rapoport's rule and in Patagonia, the species richness gradients do not show significant west-east trends.
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Trace fossils on penguin bones from the Miocene of Chubut, southern Argentina

Several traces of biological interaction were found on penguin bones from the basal levels (Aquitanian) of the Miocene Gaiman Formation in the lower Chubut valley of the Provincia del Chubut,…
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Comparative study on the resting eggs of several Anostracans (Crustacea). Key for the determination of the species based upon the egg structure and diameter

The egg size and the external egg morphology in fourteen species of anostracans were described and a key for the identification of these species was elaborate.
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Geographic distribution of the Anostracans (Crustacea) in Argentina (South America)

Using materials of collection from nearly all the Argentinian provinces, a map of the distribution of the anostracans in Argentina has been elaborated and the best represented family is the Branchinectidae one.
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Mollusks (Gastropoda and Bivalvia) of the Multiple-Use Reserve Martín García Island, Río de la Plata River: biodiversity and ecology.

The Canonical Correspondence Analysis suggests that the species distribution is related to the physico-chemical condition of water, particularly with water temperature and conductivity.
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Benthic insects of the El Tala River (Catamarca, Argentina): longitudinal variation of their structure and the use of insects to assess water quality.

The water quality of El Tala River is Class I (very clean and non-impacted), according to the results obtained from the application of the biotic Biological-Monitoring-Working-Party and Average-Store-per-Taxon indices.
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Freshwater gastropoda from Argentina

Fecundity of Uca uruguayensis and Chasmagnathus granulatus (Decapoda, Brachyura) from the "Refugio de Vida Silvestre" Bahía Samborombón, Argentina.

The aim of the present work conducted at the Refugio de Vida Silvestre Bahía Samborombón is to analyse the most relevant aspects of the fecundity of Chasmagnathus granulatus and Uca uruguayensis.…
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