Fish-aggregating-device(人工集鱼装置)

FishaggregatingdeviceAfishaggregating(oraggregation)device(FAD)isaman-madeobjectusedtoattractoceangoingpelagicfishsuchasmarlin（旗鱼）,tunaanddolphinfish.Itusuallyconsistofbuoysorfloatstetheredtotheoceanfloorwithconcreteblocks.Over300speciesoffishgatheraroundFADs.FADsattractfishfornumerousreasonsthatvarybyspecies.ThepastandpresentofFAD•Theyhavebeenusedforthousandsofyearsinvariousforms.Theearliestsurface/midwaterFADswereelementsfromnaturesuchasdriftwoodandtrees.•NowsurfaceandmidwaterartificialFADsaresystematicallyusedinalargenumberofcountries.IOTC------IndianOceanTunaCommissionWCPFC------TheWesternandCentralPacificFisheriesCommissionIATTC-------Inter-AmericanTropicalTunaCommissionICCAT-------InternationalCommissionfortheConservationofAtlanticTunas•Thepurseseine（围网）industry’sincreasingdependenceondriftingFADsisanemergingissuethatmustbeurgentlyaddressed.WhileobservedFADdeploymentshaveincreasedbymorethan60percentsince2006intheeasternPacificOceanaloneCombiningthesepiecesofinformationonvesselnumbers（船数量）andFADusageproducedatotalestimateofapproximately105,000driftingFADsactivelymonitored（监控）bytheworld’stunafishingfleet.谢谢