@inproceedings{fdi:010072137, title = {{U}nexpected evolution of {T}hiof fisheries in {S}enegal : insight from mathematical and informatics bio-economic models [r{\'e}sum{\'e}]}, author = {{B}rochier, {T}imoth{\'e}e and {A}uger, {P}ierre and {T}hiao, {D}. and {B}ah, {A}. and {L}y, {S}. and {N}guyen-{H}uu, {T}. and {B}rehmer, {P}atrice}, editor = {}, language = {{ENG}}, abstract = {{F}isheries constitute an economic sector that is much less regulated than terrestrial activities, because of the cost and difficulties of the control, especially in weak governance area. {T}hus self-regulation mechanisms of bio-economic equilibriums are the only rule. nderstanding these mechanisms is crucial to detect how to influence the auto-organistaion of fisheries regulation. {T}he thiof (epinephelus aenus) is a highly valuated commercial fish that have suffer intense exploitation in {S}enegal since several decades. {H}owever, in recent year some indicators suggest a slow recovery of the stock. {T}wo bio-economic models accounting for artisanal fishers movement and variable price were implemented in mathematical and informatics formalism. {T}he mathematical model was a set of differential equations with slow and rapid processes, solved analytically with the aggregation of variable method. {T}he informatics was an individual based model explicitly representing each fishing boats. {I}n both models, the international migration of fishermen in periods of low local abundance combined with variable price according to the market induced a shift from local over-exploitation to regional sustainable exploitation. {W}e discuss the observed evolution of thiof landings and price in {S}enegal in the light of the bio-economic dynamic suggested by the models.}, keywords = {{SENEGAL} ; {ATLANTIQUE}}, numero = {}, pages = {101}, booktitle = {{I}nternational conference {ICAWA} 2016 : extended book of abstract : the {AWA} project : ecosystem approach to the management of fisheries and the marine environment in {W}est {A}frican waters}, year = {2017}, ISBN = {978-2-9553602-0-5}, URL = {https://www.documentation.ird.fr/hor/fdi:010072137}, }