The preferred temperature (PT) of Poecilia sphenops (Pisces, Poeciliidae) (n = 240, 1.13 +/- 0.06 g wet weight, 3.26 +/- 0.88 cm standard length) from Presa Piedra Azul, Oaxaca, Mexico, was measured at acclimation temperature of 20 degreesC, 23 degreesC,…

While biologists have been aware of the existence of native Mexican trouts for over a century, they have received little study. The few early studies that did muchmore than mention their existence began in the 1930s and continued into the…

This work is part of the results of the research of the Laboratory of Invertebrates of the Facultad de Ciencias UNAM, partially financed by the Comision Nacional para el Conocimiento y Uso de la Biodiversidad (CONABIO) developing during 2006-2007. The…

Las dificultades para evaluar el conocimiento estratégico han estado relacionadas principalmente con el uso de pruebas descontextualizadas, que no requieren ponerlo en juego; por esto el interés por comprobar que las tareas auténticas de escritura ofrecen ventajas para ello. En…

The serious, probably devastating problems with which all cultures of the world are grappling are discussed, and the question of what sorts of scientific knowledge are needed to resolve these problems is considered. The knowledge now available in the behavioral…

Depuis plusieurs années, on assiste à la création de programmes en prévention du suicide à l’adolescence. L’un de ces programmes repose sur le principe des pairs aidants. Il consiste à former des jeunes dont le rôle est d’apporter du soutien…

RESUMEN En esta comunicación se sugiere una revisión de la clásica escisión entre teorías cognotivistas y no cognotivistas, a la luz que pueda resultar del repaso a algunos hitos de la teoría del conocimiento como nueva “filosofía primera” o “filosofía…

“On Experience: L. Wittgenstein and C.I. Lewis”. This essay attempts to illustrate the parallelism –in spite of certain dissimilarities in their approach and conceptualization– between Wittgenstein’s thought at the beginning of the thirties and C.I. Lewis’ theory of knowledge. The…

Palm leaves are an important resource for family households. The effect of harvest on leaf production, growth and fecundity of wild individual palm trees has been studied, but little is known about palm harvest in agro-forestry systems. In the Maya…

RESUMEN Las exigencias de adaptabilidad y flexibilidad que el EEES impone a las profesiones jurídicas, desde la defensa de una sociedad del conocimiento que se caracteriza por la informatización de casi todas las esferas de la actividad humana, deberían contemplarse…