993 resultados para 1957-1959


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12 cartas (mecanografiadas) ; entre 215x315mm y 215x157mm. Ubicación: Caja 1 - Carpeta 53

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10 cartas (mecanografiadas) ; entre 210x150mm y 222x280mm. Ubicación: Caja 1 - Carpeta 76

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ENGLISH: Annual estimates of the number of purse-seine sets made on tunas associated with dolphins are needed to estimate the total number of dolphins killed incidentally by the eastern Pacific tuna fishery. The most complete source of data, the Inter-American Tropical Tuna Commission's logbook data base, was used in this study. In the logbook data base, most sets are identified as being either associated with dolphins or not associated with dolphins. Some sets are not identified in this respect. However, the number of these unidentified sets which were associated with dolphins have been estimated by stratifying the logbook data according to whether or not any tuna were caught, whether or not the nearest identified set was associated with dolphins, and the distance to the nearest identified set. Most of the unidentified sets fell in strata characterized by a proportion of sets on tuna associated with dolphins that was lower than the overall unstratified proportion. Landings data were used to estimate the number of sets on tunas associated with dolphins from fishing trips not included in the logbook data base. SPANISH: Se necesitan las estimaciones anuales de la cantidad de lances realizados sobre atunes asociados con delfines para calcular todo el número de delfines muertos accidentalmente en la pesca atunera del Pacífico oriental. Se empleó en este estudio la fuente más completa-los datos de la Comisión Interamericana del Atún Tropical, proveniente de los cuadernos de bitácora. En éstos, la mayoría de los lances han sido identificados ya sea como asociados o no asociados con delfines. Algunos de los lances no han sido identificados a este respecto. Sin embargo, se ha estimado el número de estos lances asociados con delfines que no se habían identificado, al estratificar los datos de bitácora de acuerdo a si se había o no capturado atún, a si el lance identificado más próximo era o no un lance asociado con delfines y al averiguar la distancia del lance identificado más cercano. La mayoría de los lances sin identificar se colocan en los estratos caracterizados por una proporción de lances sobre atunes asociados con delfines, inferior a la proporción general sin estratificar. Se usaron los datos de los desembarques para calcular la cantidad de lances sobre atunes asociados con delfines en viajes pesqueros que no fueron incluídos en la base de los datos de bitácora. (PDF contains 73 pages.)

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Studies of gonads of yellowfin and skipjack tunas (Neothunnus macropterus and Katsuwonus pelamis) carried out by the Inter-American Tropical Tuna Commission indicate that during summer months the offshore area in the region of the Revilla Gigedo Islands is a spawning location for these two species (Schaefer and Orange, 1956). In July of 1957 a cruise "Tuna Spawning Survey" was made aboard the vessel ORCA to make plankton hauls and to collect ancillary data for the primary purpose of surveying abundance of tuna larvae in this region. (PDF contains 17 pages.)

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The interests of the Inter-American Tropical Tuna Commission in the hydrography and biology of the Gulf of Panama have been adequately stated in the Commission's Bulletin series (Forsbergh, 1963; Howard, 1954; Howard and Landa, 1958; Peterson, 1961; Schaefer, 1953; Schaefer and Bishop, 1958; Schaefer, Bishop and Howard, 1958). The present report deals with data collected on 10 surveys made by Tuna Commission personnel for the purpose of describing seasonal upwelling by means of a study of the temperature structure of the Gulf of Panama, and a comparison of the thermal pattern during the dry, upwelling season (January to April) with that of the rainy season (May to December). Considerations of upwelling in the Gulf have been shown to be of interest and of probable biological consequence by Schaefer (1951) and by Simpson (1959). (PDF contains 60 pages.)

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ENGLISH: The Inter-American Tropical Tuna Commission was established under authority of a Convention between the Governments of Costa Rica and the United States, which entered into force in 1950_ The Convention provides for the adherence of other governments having an interest in the tuna and tuna-bait resources of the Eastern Tropical Pacific Ocean, by exchange of correspondence with existing members. Panama adhered to the Convention in 1953. SPANISH: La Comisión Interamericana del Atún Tropical fué establecida en virtud de una Convención entre los Gobiernos de Costa Rica y de los Estados Unidos, cuya vigencia comenzó en 1950. Dicha Convención permite la entrada de otros gobiernos que tengan interés en los recursos de atún y de peces de carnada para su pesca en el Océano Pacífico Oriental Tropical, mediante el intercambio de correspondencia con los países firmantes. Panamá se adhirió a la Convención en 1953. (PDF contains 134 pages.)

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ENGLISH: The Inter-American Tropical Tuna Commission was established under authority of a Convention, between the Governments of the Republic of Costa Rica and the United States of America, which entered into force in 1950. The Convention provides for the adherence, by exchange of correspondence with existing members, of other governments having an interest in the tuna and tuna-bait resources of the Eastern Tropical Pacific Ocean. The Republic of Panama adhered to the Convention in 1953. SPANISH: La Comisión Interamericana del Atún Tropical fue establecida en virtud de una Convención suscrita entre los Gobiernos de la Republica de Costa Rica y de los Estados Unidos de America, que entro en vigencia en 1950. La Convención esta abierta para que otros gobiernos interesados en los recursos de atún y de carnada para la pesca de este en el Océano Pacifico Oriental Tropical puedan adherirse a la misma mediante intercambio de correspondencia con los Gobiernos Miembros. La Republica de Panamá se adhirió a la Convención en 1953. (PDF contains 156 pages.)

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1 tarjeta postal (manuscrita) ; 150x105mm

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The feeding of freshwater copepods, especially cyclopoida, has been poorly covered in research so far. The majority of existing special works on the feeding of cyclopoida illustrate this question only from the qualitative side. The food content of the nauplius of freshwater cyclops has not been studied at all, as also the feeding of adult entomostracans on bacteria. Moreover the question of the suitability of vegetable food for Cyclops is not clear enough. This article aims to elucidate as fully as possible the nutrition of Acanthocyclops viridis (Jur.) - a large cyclops, inhabiting the mass of demersal layers of the open parts of the Rybinsk reservoir and its foreshore. The present work is devoted only to the predatory feeding of A. viridis, and includes data from the content of the intestines of cyclops, collected in natural conditions, and also the results of experimental observations carried out in a laboratory during 1958.

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The ciliated protozoan Chilodonella cyprini is described. Chilodon parasitizes the body, gills and fins of fishes. The infusoria produce irritation of the integument and strengthened mucous secretion. The sparse knowledsge of the ecology of chilodon is summarised and some advice on the struggle against cholodoniasis in carp given.

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To ascertain the effect of various concentrations of oxygen in water on the fry of rainbow trout experiments were made with aquaria at various concentrations of oxygen. The food supplied was chironomid larvae (Chironomus plumosus). A surplus of food was supplied to the fry. Indices are given of the reaction of the fry to different temperatures.

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Este trabalho parte da análise de entrevistas, artigos e demais textos de autoria de Glauber de Andrade Rocha entre os anos de 1959 e 1979, para entender a trajetória de desenvolvimento do cinema brasileiro e suas relações com a política e economia nacionais. Glauber Rocha, cineasta e um dos principais membros do Cinema Novo brasileiro, se tornou internacionalmente conhecido por sua cinegrafia marcada pela crítica social e por seus fins político-didáticos. Sua atuação como crítico de cinema e sua participação nos debates em torno das políticas públicas de fomento à indústria cinematográfica no Brasil lhe renderiam o título de líder do movimento cinemanovista e o afirmariam, ao longo dos anos sessenta e setenta, como um dos artistas-intelectuais de maior expressão política do país.

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Herrn Professor Dr. Andres v. BRANDT Ltd.Dir. und Prof. des Instituts für Fangtechnik, Hamburg, zum 60. Geburtstag gewidmet.

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This brief reports highlights the significance of scale readings of salmon. The reasons for colour change of scales and scale rings are briefly explained. Scale readings of salmon fry from the River Lune in the north west of England are presented. The salmon was captured in 1957/58.