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Fitting a model of flexible multifleet–multispecies fisheries to Senegalese artisanal fishery data

Published online by Cambridge University Press:  15 March 2001

Nicolas Pech ,
Alassane Samba ,
Laurent Drapeau ,
Robert Sabatier  and
Francis Laloë
Nicolas Pech
Affiliation:
Laboratoire HEA, IRD, B.P. 5045, 34032 Montpellier cedex 1, France Present address: E.A. Biodiversité Laboratoire d'Hydrobiologie, case 36, Université de Provence, 1-3, place Victor-Hugo, 13331 Marseille cedex 3, France UMR 063 Eger, IRD-C3ED (UVSQ), B.P. 5045, 34032 Montpellier cedex 1, France
Alassane Samba
Affiliation:
Centre de recherches océanographiques de Dakar-Thiaroye, B.P. 2241, Dakar, Senegal UMR 063 Eger, IRD-C3ED (UVSQ), B.P. 5045, 34032 Montpellier cedex 1, France
Laurent Drapeau
Affiliation:
Laboratoire HEA, IRD, B.P. 5045, 34032 Montpellier cedex 1, France
Robert Sabatier
Affiliation:
UMR 063 Eger, IRD-C3ED (UVSQ), B.P. 5045, 34032 Montpellier cedex 1, France UMR CNRS 9921, Faculté de pharmacie, 15, avenue Charles-Flahaut, 34060 Montpellier cedex, France
Francis Laloë
Affiliation:
Laboratoire HEA, IRD, B.P. 5045, 34032 Montpellier cedex 1, France UMR 063 Eger, IRD-C3ED (UVSQ), B.P. 5045, 34032 Montpellier cedex 1, France
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Abstract

Fisheries exploitation systems are characterized by reciprocal interactions between fisheries activity and the harvested resource. Variability and changes affecting ‘natural’ and ‘socio-economic’ environments generate non stationarity of the variables used to describe the fishing activity, the resource and the yields. This characteristic needs to be taken into account in describing the evolution of the relationships between those variables, and in describing fisheries adaptability and sustainability. We present a dynamical system model with an application to data from surveys on activity and results of the Senegalese artisanal fishery from 1974 to 1992. A fitting procedure is proposed, giving estimates of the parameters of the model. A simulation is then made with the fitted model in order to apraise possible impacts of various events of different kind.

Keywords

dynamical systemmultivariate time seriesmodel fittingfishing strategiesfishing tacticsfleet dynamicspopulation dynamics
Type
Research Article
Information
Aquatic Living Resources , Volume 14 , Issue 2 , March 2001 , pp. 81 - 98
Copyright
© Elsevier, IRD, Inra, Ifremer, Cemagref, CNRS, 2001

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