Diversidad de micobiota en diferentes especies de hormigas cortadoras de hojas y sitios de Argentina

Cambios Rpidos en las Directrices en Comunidades de Pescadores de Yangtze y en la Memoria Local de Especies Extintas

Local ecological knowledge can provide a unique source of data for conservation, especially in efforts to investigate the status of rare or possibly extinct species, but it is unlikely to remain constant over time. Loss of perspective about past ecological conditions caused by lack of communication between generations may create “shifting baseline syndrome,” in which younger generations are les...

Existence de la brucellose en Iran. Isolement de Brucella abortus

Comparativo empírico de medidas de diversidad en problemas de optimización evolutiva con restricciones

Premature convergence is one of the central problems in evolutionary algorithms, and its main reason consists in the lack of diversity. In order to monitor diversity, special measures must be employed, which describe the population’s spread over the search space or according to the fitness values. Some diversity measures have been proposed for unconstrained optimization and their capability to ...

Uso del algoritmo de colonia de hormigas en el aprendizaje de redes bayesianas

The bayesian networks model phenomena through a set of variables and their dependence. With these models is possible to develop bayesian inference. The models have several applications in data classification, data prediction, diagnostics, etc. Also, these models provide revelant information about the relationship between the variables and sometimes can be interpreted as a cause-effect relations...

Batrachochytrium dendrobatidis y el Colapso de la Riqueza de Especies y Abundancia de Anuros en el Parque Nacional del Manu, Sureste de Per

Amphibians are declining worldwide, but these declines have been particularly dramatic in tropical mountains, where high endemism and vulnerability to an introduced fungal pathogen, Batrachochytrium dendrobatidis (Bd), is associated with amphibian extinctions. We surveyed frogs in the Peruvian Andes in montane forests along a steep elevational gradient (1200–3700 m). We used visual encounter su...