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	Provedor de dados ArchiMer (1) Autor Poulard, Jean-charles (1) Trenkel, Verena (1) Palavra-chave Bay of Biscay (1) Catchability (1) Survey conditions (1) Survey index (1) Time trends (1) Tipo do documento Text (1) Ano 2007 (1) País France (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Do survey design and wind conditions influence survey indices ? ArchiMer Poulard, Jean-charles; Trenkel, Verena. Survey indices play an important role in stock assessments as they provide information on stock trends. In certain cases large interannual variations have been observed which are unlikely to reflect true underlying stock changes but are rather outliers. When survey indices for several species appear to be outliers for the same year, the suspicion is raised that something happened during the survey of that year. This is called a year-effect in survey catches. To study the potential year-effect in survey catches for the French autumn groundfish survey taking place in the Bay of Biscay, several indicators for survey design and wind conditions were derived as explanatory variables and Principal Component Analysis was used to study the relationship between... Tipo: Text Palavras-chave: Bay of Biscay; Survey conditions; Time trends; Catchability; Survey index. Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2690.pdf Registros recuperados: 1 Primeira ... 1 ... Última

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