The role of communities associated to a substrate as fundamental components of an aquatic system has been recognized by many authors. Although periphyton has been considered of great importance in shallow lakes, its inclusion in different ecological models has been…

Background: Fieldwork has thoroughly established that most eggs are intensely predated. Among the few exceptions are the aerial egg clutches from the aquatic snail Pomacea canaliculata which have virtually no predators. Its defenses are advertised by the pigmented ovorubin perivitellin…

The aim of this paper is to describe and discuss some results from an ethnographic research on Argentinian Mbya communities focused on representations and practices related to childrearing and development during the first stages of life course.
Firstly, I describe…

La expansión del riego complementario con aguas subterráneas en una vasta región de Argentina con alta productividad trajo como beneficio el incremento en rendimientos y mayor protección ante sequías, pero también problemas cuali-cuantitativos por conflictos con el uso doméstico. El…

Numerosos agentes intrínsecos y extrínsecos afectan de diferentes formas los grados de preservación de restos óseos humanos. La observación de la forma e intensidad en las que tales factores inciden en las características del registro osteológico de una muestra contemporánea…

Fotografía Experimental consiste en un taller creado para los alumnos del último año de la Orientación Ciencias Naturales del Liceo Víctor Mercante de la U.N.L.P. El aspecto que lo caracteriza es el trabajo interdisciplinario que se realiza durante su desarrollo…

The main characteristics of Darwin's life and work will be examined, as well as the developments which occurred after his death, especially neodarwinism and the synthetic theory of organic change. In which ways the extraordinary progress made in the field…

El objetivo de este trabajo es exponer algunas inflexiones teórico- metodológicas que han favorecido en los últimos años la producción del conocimiento científico referida a sitios con enterratorios humanos. Para ello se utiliza como estudio de caso, a modo de…

Corallus annulatus (Northern Annulated Tree-boa) is a little-studied tropical Boid occurring disjunctively throughout Central America and tropical South America in mostly lowland tropical moist and wet forests (Holdridge, 1967; Stafford & Henderson, 1996; Smith & Acevedo, 1997; Henderson et al.,…

Processes of spatial mobility among the Mbya are of interest in anthropological and ethnobiological studies, as these processes are related to transformations in the landscape and the environment. Despite this, ethnographic literature usually focuses itself on the mobility of Guaraní…