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.)

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.)

Report of the Inter-American Tropical Tuna Commission for the year 1962

ENGLISH: The Inter-American Tropical Tuna Commission, pursuant to the provisions of the Convention, has the duty of collecting and interpreting factual information to facilitate maintaining the populations of tunas, and of tuna baitfishes, supporting the fisheries pursued by nationals of its Member Governments in the Eastern Pacific Ocean, at levels which will permit maximum sustainable average harvests year after year. This requires a wide variety of research into the biology, life history, ecology and population dynamics of the several species, and investigations into the effects of both natural factors and fishing activity on their abundance and on the harvests they can sustain. The research is conducted by a permanent, internationally recruited scientific staff, employed directly by the Commission, selected on the basis of professional competence by the Director of Investigations. SPANISH: La Comisión Interan1ericana del Atún Tropical, de informidad con las disposiciones de la Convención, tiene el deber de recolectar e interpretar la información que facilite el mantenimiento de las poblaciones del atún y de los peces de carnada que sirven para la pesca de este, sosteniendo las pesquerías a que se dedican los habitantes de sus Gobiernos Miembros en el Océano Pacifico Oriental, a niveles ,de abundancia que permitan un promedio máximo sostenible de cosechas ano tras ano. Esto requiere una amplia variedad de investigaciones dentro de la biología, historia natural, ecología y dinámica de las poblaciones de diversas especies, y sabre los efectos, tanto de los factores naturales como de la actividad pesquera, en la abundancia de las mismas y en el rendimiento que puedan dar. La investigación es conducida por un grupo científico permanente, cuyos miembros son reclutados internacionalmente empleados directamente por la Comisión, una vez que han sido seleccionados sobre la base de su competencia profesional, por el Director de Investigaciones. (PDF contains 149 pages.)