Data/hora: 11/06/2024 10:58:52

Provedor de dados: | 5
País: | France
Título: | Regional metier definition: a comparative investigation of statistical methods using a workflow applied to international otter trawl fisheries in the North Sea
Autores: | Deporte, Nicolas; Ulrich, Clara; Mahevas, Stephanie; Demaneche, Sebastien; Bastardie, Francois.
Data: | 2012-03
Ano: | 2012
Palavras-chave: | Cluster; Data Collection Framework (DCF); Logbooks; Mtier; Mixed fisheries; Multivariate analysis; North Sea.
Resumo: | The European Common Fisheries Policy recognizes the importance of accounting for heterogeneity in fishing practices, and metier-based sampling is now at the core of the EU Data Collection Framework. The implementation of such an approach would require Member States to agree on the standard regional metier definitions and on practical rules to categorize logbook records into metiers. Several alternative approaches have been used in the past to categorize landings profiles, but no consensus has yet emerged. A generic open-source workflow is developed to test and compare a selection of methods, including principal components analysis (PCA), hierarchical agglomerative clustering (HAC), K-means, and Clustering LARge Applications (CLARA), and to provide simple allocation rules. This workflow is applied to a unique regional dataset consisting of bottom-trawl logbooks of five North Sea countries. No method proved to be infallible, but combining PCA with either CLARA or HAC performed best. For 2008, a hierarchical classification with 14 species assemblages is proposed. Discriminant analysis proved more robust than simple ordination methods for allocating a new logbook record into an existing metier. The whole approach is directly operational and could contribute to defining more objective and consistent metiers across European fisheries.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00071/18225/15841.pdf

DOI:10.1093/icesjms/fsr197

https://archimer.ifremer.fr/doc/00071/18225/

Editor: | Oxford Univ Press
Formato: | application/pdf
Fonte: | Ices Journal Of Marine Science (1054-3139) (Oxford Univ Press), 2012-03 , Vol. 69 , N. 2 , P. 331-342

Fonte:

2012 International Council for the Exploration of the Sea. Published by Oxford University Press. All rights reserved.

info:eu-repo/semantics/openAccess

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