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Cluster analysis of linear model coefficients under contiguity constraints for identifying spatial and temporal fishing effort patterns ArchiMer
Mahevas, Stephanie; Bellanger, Lise; Trenkel, Verena.
For fisheries management purposes, it is essential to take into account spatial and seasonal characteristics of fishing activities to allow a reliable assessment of fishing impact on resource. This paper presents a novel technique for describing spatial and temporal patterns in fishing effort. The spatial and seasonal fishing activity patterns of the French trawler fleet in the Celtic Sea during the period 1991–1998 were analysed by modelling fishing effort (fishing time) with generalised linear models. The linear model for fishing effort included fixed effects for both spatial (statistical rectangles) and temporal units (months). In addition, spatial correlations in any given month were modelled by an exponentially decreasing function. Temporal...
Tipo: Text Palavras-chave: Fleet dynamics; Allocation of Fishing effort; Spatial and seasonal pattern; Statistics for spatial data; Cluster analysis under contiguity constraints; Generalised linear model.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4302.pdf
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