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	Provedor de dados OceanDocs (2) Autor Aubone, A. (2) Irusta, C.G. (2) Simonazzi, M.A. (2) Ibañez, P.M. (1) Pérez, M. (1) Palavra-chave Abundance (1) Catch/effort (1) Eco surveys (1) Fishery surveys (1) Fishing fleet (1) Fishing mortality (1) Fishing operations (1) Fishing power (1) Fishing vessels (1) Gadoid fisheries (1) Mathematical models (1) Sampling (1) Swept area (1) Mais... Tipo do documento Journal Contribution (2) Ano 1998 (1) 1997 (1) País Belgium (2) Idioma Espanhol (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Estimación de los poderes de pesca relativos de la flota dealtura convencional merlucera argentina. Zona patagónica: 41°-48°S OceanDocs Irusta, C.G.; Aubone, A.; Simonazzi, M.A.; Ibañez, P.M.. In this paper detailed mathematical description of the generalized lineal model used and data grouping criteria are presented in order to estimate the relative fishing power of four categories of the hake ice-chilled fleet. The analysis was focused to the patagonian sector (41°-48°S) of the hake total distribution area.The fleet has systematically operated in the same fishing areas between 1989-1993. The variables that better explain in yields trends of each vessel category were analyzed. The fishing power of vessels with power higher than 1200 HP has been raising since 1990 because of increasing efficiency. These vessels generate three times more fishing mortality than the standard vessels (lower than 700 HP) Tipo: Journal Contribution Palavras-chave: Gadoid fisheries; Catch/effort; Mathematical models; Fishing power; Fishing vessels; Fishing mortality; Fishing fleet. Ano: 1997 URL: http://hdl.handle.net/1834/5791 Propuesta de estandarización del área barrida en campañas de investigación dirigidas a evaluar juveniles de merluza común Merluccius hubbsi OceanDocs Pérez, M.; Aubone, A.; Simonazzi, M.A.; Irusta, C.G.. Precision of abundance index estimation Merluccius hubbsi is directly related with the variability that normally occurs during the fishing operation and consequently in the geometry of the net duringeach haul. Some of these factors can be controlled, therefore the standardization of the sampling methodology avoids differences in the behaviour and 'work' of the net minimizing variations in the catchability between hauls. The acoustic equipment (SCANMAR) in there search vessels, allows to monitore the fishing operation during the trawl and to develop strategies in order to reduce the variability and to improve the precision of the estimations. The applicability of the methodology and there for the validity of the estimates indifferent cruises must be studied... Tipo: Journal Contribution Palavras-chave: Fishing operations; Abundance; Sampling; Fishery surveys; Eco surveys; Swept area. Ano: 1998 URL: http://hdl.handle.net/1834/5786 Registros recuperados: 2 Primeira ... 1 ... Última

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