The megalopa stage of Portunus spinimanus Latreille, 1819 and Portunus gibbesii (Stimpson, 1859) (Decapoda, Brachyura, Portunidae) from the southeastern Atlantic coast of the United States

The identification of megalopae from plankton samples is difficult, because this larval stage is the least well known among crab larvae, unknown in some species and poorly described in others. Wild megalopa specimens of some swimming crabs (family Portunidae Rafinesque, 1815) were captured alive from neuston samples obtained during summer surveys near the coast of Charleston, South Carolina (U.S.A). For identification purposes, larvae were reared to the 8th juvenile instar. After reaching the 5th juvenile instar, the juvenile crabs exhibited morphological features suitable for identification to the species level. The specimens belonged to two species of Portunidae, Portunus spinimanus Latreille, 1819 and P. gibbesii (Stimpson, 1859). Their megalopae were described in detail and compared to other portunid megalopae known from the southeastern Atlantic coast of the U.S.A. Species-specific characters of portunid megalopae are the number of carpal spines on the chelipeds, the relative size of the sternal spines (7th sternite), the number of antennal flagellum segments, and the setation of mouthparts. Copyright © 2007 Magnolia Press.

Estudio económico de América Latina 1953 = Economic survey of Latin America 1953

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Escritos de Osvaldo Sunkel, 1953-1988

Contiene citas de libros, documentos, artículos de publicaciones periódicas, conferencias, comentarios, etc., existentes en la Biblioteca CEPAL

Escritos de Enrique V. Iglesias, 1953-2001: Presidente del Banco Interamericano de Desarrollo (BID); Ex Ministro de Relaciones Exteriores de la República Oriental del Uruguay; Ex Secretario Ejecutivo de la Comisión Económica para América Latina y el Caribe (CEPAL). Bibliografía existente en la Biblioteca de la CEPAL

Se incluyó además en la investigación la Biblioteca de la Fundación Educacional "Roberto Bellarmino" y la Biblioteca del Centro de Investigación y Planificación del Medio Ambiente (CIPMA)

Escritos de Aldo E. Solari, 1953-1989 (versión preliminar)

Bibliotecas consultadas: Biblioteca personal Sr. Rolando Franco, Biblioteca CEPAL, Sala CEPAL en la Biblioteca de la Comisión, Biblioteca FLACSO y Biblioteca del ILPES.

Avaliação da dinâmica do uso da terra na bacia do arroio Santa Bárbara - pelotas (Brasil), no período de 1953 a 2006

Land use dynamics is a consequence of socioeconomic system cycles. In this context, this work was developed aiming to evaluate land use alterations in Santa Bárbara watershed (Pelotas - Brazil), during 53 years (1953 - 2006), evidencing socioeconomic elements that contributed to this process. For land use dynamic analysis, maps of 1953, 1965, 1995 e 2006 were elaborated. Spatial changes that happened in Santa Bárbara watershed represent a regional process: pasture areas had decrease while culture lands had a gradual increase. This conjuncture is a consequence of the crisis in livestock destined to salted and dried meat production and of the food industry growth in Pelotas that impelled urban expansion, forest area reduction and artificial water reservoirs increase. © Scripta Nova, 2010.

Cuba: evaluacion y ajuste del censo de 1953 y las estadisticas de nacimientos y defunciones entre 1943 y 1958. Tabla de mortalidad por sexo, 1952-1954

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Estimacion de la mortalidad de Cuba, 1943-1953

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Chile: Tablas abreviadas de mortalidad, 1952-1953 y 1960-1961

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Antecedentes estadísticos de la distribución del ingreso: Argentina 1953-1982

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