%0 Conference Proceedings
%9 ACTI : Communications avec actes dans un congrès international
%A Fonteneau, Alain
%A Chassot, Emmanuel
%T Managing tropical tuna purse seine fisheries through limiting the number of drifting fish aggregating devices in the Indian Ocean : food for thought
%S 16ème groupe de travail sur les thons tropicaux
%C Victoria
%D 2014
%L fdi:010063303
%G ENG
%I CTOI
%K PECHE THONIERE ; SENNEUR ; DISPOSITIF DE CONCENTRATION DES POISSONS ; CONSEQUENCE ECOLOGIQUE ; GESTION DES PECHES ; EFFORT DE PECHE ; CAPTURE ; VARIATION PLURIANNUELLE
%K OCEAN INDIEN
%N IOTC-2014-WPTT16-22
%P 26
%U https://www.documentation.ird.fr/hor/fdi:010063303
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers15-01/010063303.pdf
%W Horizon (IRD)
%X This paper deals with the use of drifting fish aggregating devices (DFADs) in the Indian Ocean and of the potential interest to manage purse seine fisheries through limiting their number. Potential risks associated with a massive use of DFADs are first discussed. Based on new information on the numbers of DFADs released by the French fleet in the 2003-2014 period, this paper estimates the levels and trends of the total numbers of DFADs deployed and active at-sea. It is estimated that the total number of DFADs numbers has been increasing by about 70% since the early 2000s and that they could reach 10,500-14,500 nowadays. A good knowledge of the total numbers of DFADs is urgently needed to better estimate the fishing effort and capacity of purse seine fisheries. Future limitations in the number of DFADs could be a direct and efficient way to reduce fishing effort exerted by purse seiners and their support vessels. Following a precautionary approach, we suggest that IOTC could consider setting a cap on the number of DFADs drifting at-sea and that threshold reference levels could be based on the year 2013, at least to slow down the trend observed in the overall fishing capacity on DFADs. Such measures should be first carefully analysed by an ad hoc IOTC DFAD multidisciplinary working group to ensure their efficient implementation and to allow an improved sustainability of the concerned fisheries.
%B GTTT : Groupe de Travail sur les Thons Tropicaux
%8 2014/11/15-19
%$ 040PECHE01