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Auteur (up) Snouck-Hurgronje, J.E.; Kaplan, D.M.; Chassot, E.; Maufroy, A.; Gaertner, D. doi  openurl
  Titre Fishing on floating objects (FOBs): how French tropical tuna purse seiners split fishing effort between GPS-monitored and unmonitored FOBs Type Article scientifique
  Année 2018 Publication Revue Abrégée Can. J. Fish. Aquat. Sci.  
  Volume 75 Numéro 11 Pages 1849-1858  
  Mots-Clés aggregating devices fads; behavior; indian-ocean; pacific  
  Résumé Fishing on floating objects (FOBs) dominates catch in tropical tuna purse seine fisheries. One frequently cited advantage of deploying GPS-monitored FOBs is that the position information can be used for directed fishing to reduce search time for tuna. However, purse seiners also fish on foreign objects for which position information is not available. It is critical to quantify the prevalence of fishing on GPS-monitored versus unmonitored FOBs to understand how they impact fishing effort and catch per unit effort. We analyzed French commercial, observer, and FOB trajectory data in the Atlantic and Indian oceans to determine how often purse seine vessels fish on GPS-monitored FOBs. Only 2.7%-20.4% of French FOB fishing sets over 2007-2013 in both oceans were made on GPS-monitored FOBs. Though increasing over time, the low percentage suggests that French vessels do not primarily use GPS-monitored FOBs to reduce search time for tuna. We hypothesize that fishery-wide FOB deployments have important collective consequences for overall fishing effort and recommend that future effort metrics should be based on fishery-wide FOB activities.  
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  Langue English Langue du Résumé Titre Original  
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  ISSN 0706-652x ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel MARBEC @ alain.herve @ collection 2444  
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