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Provedor de dados:  ArchiMer
País:  France
Título:  A new statistic for sampling design investigation : an application to length-structured landings sampling
Autores:  Vigneau, Joel
Mahevas, Stephanie
Data:  2005-09-19
Ano:  2005
Palavras-chave:  Stratification
Sampling design
Length structure
Market sampling
Resumo:  Measuring fish on a market or on board a vessel is the most common action taken by biologists all around the world to gather data for stock assessment. The samples coming from this kind of survey are of vector type and are not straightforward to analyse and compare. This paper proposes a generic tool that enables to investigate in any multinomial like sampling scheme. The use of this tool will be discussed based on examples from two different sampling designs. One is a sampling of commercial market categories and the other is a métier based sampling. The research of outliers, misallocated samples or potential bias, the stratification and the analysis of within and between strata variance will be discussed with the objective of constructing the best sampling design and insure the quality of the input data for stock assessment models. This statistic is easy to implement and should be considered as a mandatory step to validate the sampling data at an international level.
Tipo:  Text
Idioma:  Inglês
Editor:  ICES CM 2005/Z :07
Formato:  application/pdf

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