ProBiota: Programa para el Uso Sustentable de la Biota Austral.

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El Herbario: significado, valor y uso.

En la historia de la vida sobre la Tierra, el capítulo que trata sobre el almacenamiento y conservación de las plantas se escribe en los dominios del herbario. El herbario posee los ejemplares que documentan la exploración del hombre sobre la superficie terrestre, de manera que no sólo existe el documento escrito que narra la historia del explorador sino que tenemos el privilegio de tocar esos objetos o especímenes. Así, cada herbario en el mundo posee un tesoro escondido de especímenes históricos que son el fiel testigo de las hazañas de un investigador o de una exploración a algún lugar remoto. En las últimas dos décadas el medio en el que se desarrollan los herbarios y sus colecciones han subrido cambios muy significativos, los que a su vez han ejercido presiones sobre quienes manejan las colecciones. Algunos de estos cambios son la disminución de los aportes económicos a los herbarios, el cambio en el uso de la evidencia morfológica hacia la molecular en los estudios sistemáticos y la pérdida acelerada de la biodiversidad que trae aparejada la necesidad urgente de realizar inventarios florísticos. En una era de extinción de biotas, las colecciones valiosas como son hoy día, serán aún más valiosas en los años por venir. Las colecciones representan el testigo imprescindible para la ciencia y el vehículo para llegar a las posibles soluciones. Es por ello que el conocimiento del significado, valor y uso del herbario y sus colecciones reviste una vital importancia para la ciencia y para la sociedad.

Evaluación del rendimiento pesquero potencial de la República Argentina: I. Datos 1

A limnological and fish survey program was developed on 110 lakes and reservoirs of Argentina during the summers of 1984 to 1987. Here we exclude lakes without fish. Lakes and reservoirs were visited once each, except for six situated in Chubut Province that were studied seasonally over the course of two years. Here we present raw data used to evaluate the potential fish yield of Argentinian lakes and reservoirs. (Document contains 56 pages.)

Evaluación del rendimiento pesquero potencial de la República Argentina: II. Evaluación por regiones

A limnological and fish survey program was developed in 110 lakes and reservoirs of Argentina during the summers of 1984 to 1987. Lakes and reservoirs were visited once, except for six situated in the Chubut Province that were studied seasonally over the course of two years. The sampling surveys were performed by the "Instituto Nacional de Investigación y Desarrollo Pesquero" and the "Provincia de Chubut". Here we present preliminary results of potential fish yield assessment on a regional basis, using empirical models. (Document contains 11 pages.)

El desarrollo de la cuenca del Plata y la prohibición al uso del "mallón" en la confluencia de los ríos Paraná y Paraguay

Document contains 30 pages.

Evaluación del rendimiento pesquero potencial de la República Argentina: III. Edad y crecimiento de peces 1

Age and growth of populations of three fish species from sixteen lakes and reservoirs situated in the Patagonian Andean and the Patagonian Plateau Region (Argentina) were studied. They included two native species, the Patagonian smallmouth perch. (Percichthys trucha) and the Patagonian silverside (Patagonina hatcheri) and the introduced rainbow trout (Oncorhynchus mykiss). For the three species backcalculated lenght at age was obtained from scale readings. Von Bertalanffy growth curves were usually adjusted to data. For the three species, faster growth was related with lake productivity. (Document contains 38 pages.)

La cuenca del Salado: uso y posibilidades de sus recursos pesqueros.

The fishing resources of the Salado Basin are extraordinary important in the context of the inland waters of Argentina. However, the diversity of landscapes in the basin and the lack of continuity in the regional planning , have made difficult a proper management of the fishing resources. This paper has a general overview of the main aspects related to the fishing fauna of the region, with a natural point of view of the processes and mechanisms of the management. A description of the fishes basin community and the identification of the species with commercial and game interests is included . We describe the different fishing gears used in the province for game, commercial and scientific fishing. We review the criteria of diagnosis of the silver side population as a main resource of fishing interest and under this point of view we propose new outlooks to promote a proper management of the resources and its sustainable use. We identify the different kinds of fisheries that are common in the basin and we make a survey of the related socioeconomic aspects. Moreover, we analyze the development of a new institutional and regulatory frame in order to optimize the management of the fishing resources. Finally, we define criteria for ordering and conserving such resources and identify conflict points and requirements for its sustainable use in the context of new proposals for the public policies.

Reconhecimento de uma área potencial para a pesca de carapau de profundidade

This article relates about the identification of a potential area for deep-sea fishing of mackerel, carried out during a more general survey conducted by the Soviet trawler Sebastopolsky Rybak.