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Cystoliths are phytoliths of silica and calcium carbonate and are produced in a few groups of dicotyledonous angiosperms. Anatomical and, more recently, phytolith studies have recorded them in different families. In the ...

Twenty seven years ago, the ComisiónTécnica Mixta del Frente Marítimo publisheda catalogue of marine decapod andstomatopod crustaceans registered in coasts,continental shelf and slope, and deep waters ofArgentina (Bos...

In Argentina, studies dealing with marine debris coastal wetland beaches are scarce, particularly those encompassing biosphere reserves in northern Patagonia. A total of 6513 items, weighting 66.3 kg, were collected in t...

Feeding decisions under predation risk can be a key in the life of scavenger organisms, and tuned recognition of predation alarm cues and flexibility in the response are fundamental. The effect of injured conspecifics on...

The digestive and metabolic characteristics at the biochemical level underlying between-habitat dietary shift of the SW Atlantic euryhaline burrowing crab Neohelice granulata under natural conditions are unknown. We made...

The importance of small-scale heterogeneity in local factors which overrides that of larger-scales factors, suggest that local factors play a major role in determining the richness and prevalence of larval digeneans in i...

A near-Heyting algebra is a join-semilattice with a greatest element such that every principal upset is a Heyting algebra. We will present several characterizations of the concept of near-Heyting algebra. We will show th...

Residues discarded at cherry fruit harvesting were extracted with ethanol from ‘Chelan’, ‘Brooks’ and ‘Sunburst’ varieties to obtain cherry fibers constituted by the cell wall polysaccharides, applicable as f...

We describe qualitatively and quantitatively the copulatory pattern of Ctenomys talarum (tuco-tuco) and evaluate it according to that expected for induced ovulators. Mating trials were performed in an experimental appara...

The Chubut River is a Patagonian river that flows from the Andes to the Atlantic Ocean, and is interrupted by a dam built at the middle valley. To investigate the sedimentary history of the lower river basin, a sediment ...

We assessed differences in diet composition between Imperial Cormorants (Phalacrocorax atriceps) breeding at Isla Arce and Isla Vernaci Este, Golfo San Jorge, Argentina. Both colonies are located within the Patagonia Aus...

Glucocorticoids participate in the behavioral and physiological responses generated under stressful circumstances coming from different sources—physical and/or psychological. In mammals, the increases of these hormones...

En el presente trabajo se analiza la distribución y abundancia de cápsulas de huevo de las rayasBathyraja brachyurops y B. macloviana en la plataforma bonaerense y el cañón submarino frente a Mar del Plata y sedescri...

Interannual changes in precipitation cause significant effects on the Pacific watersheds of South America. Large rivers flowing to the Atlantic Ocean as the Paraná and Uruguay are also influenced by ENSO-triggered flood...

Ocean acidification (OA) can impair antioxidant responses in bivalves altering their capacity to cope with environmental changes. Here, we analyzed the effects of short-term OA exposure on antioxidant responses of an imp...

Microplastics are currently considered widespread marine pollutants, accumulating in sediments and shorelines around the world. Spatial distribution of microplastics in marine sediments is consequence of a combination of...

A novel bacterial isolate with polysaccharides degrading activity was identified as Paenibacillus sp., andnamed Paenibacillus sp. A59. Even though it is a strict mesophile, optimal xylanase activity of the crudeenzymatic...

The Pampeano aquifer formed by loess-like sediments provides water to cities and for agricultural uses in the Pampean plain, which is the most productive area in Argentina. Studies on the mechanisms through which this gr...

Nest survival is an important part of breeding success in grassland ecosystems, and the location of nests can determine vulnerability to different predators. We conducted an experiment with artificial nests to evaluate j...

The monophyletic group Caviomorpha constitutes the most diverse rodent clade in terms of locomotion, ecology and diet. Caviomorph species show considerable variation in cranio-mandibular morphology that has been linked t...

From molecular determination we can confirm that the stranded bird analyzed corresponded toa Thalassarche steadi individual. This identification method has been previously implemented in themolecular determination of shy...

During ontogeny, complex adaptations undergo changes that sometimes entail different functional capabilities. This fact constrains the behaviour of organisms at each developmental stage. Rodents have ever-growing incisor...

In the present paper a specimen of the blue runner Caranx crysos, a termophilic species commonly found in subtropical Atlantic waters, was newly reported from Mar del Plata coast. The presence of the blue runner in Argen...

Fil: Rieznik, Marina. Universidad Nacional de Quilmes; Argentina. Fil: Rieznik, Marina. Universidad de Buenos Aires; Argentina. Fil: Rieznik, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin...