Mitigating impacts of fishing on pelagic ecosystems
15-18 Oct 2012 Montpellier (France)
Thursday 18
Session 7: MITIGATION TECHNIQUES IN PURSE SEINE FISHERIES

› 14:25 - 14:45 (20min)
› Auditorium
Mitigating bycatch of Bigeye on purse seine FAD operation using light stimuli
Tatsuki Oshima  1, *@  , T. Imaizumi  2  , K. Yokota  1  , H. Iga  1  , Y. Semba  3  , Y. Mizoguchi  2  , Y. Takao  2  , H. Okamoto  3  , I. Fujesima  1  , S. Hasegawa  2  
1 : Marine Fisheries Research and Development Center   (JAMARC)
2 : National Research Institute of Fisheries Engineering  (NRIFE)
3 : National Research Institute of Far Seas Fisheries  (NRIFSF)
* : Corresponding author

 

 

Mitigating bycatch of juvenile Bigeye on purse-seine FAD operation is an urgent issue.

Feasibility of using light stimuli to force Bigeye escape from the net was examined. Cage experiments showed that Skipjack tend to evade more from intermittent light than Bigeye does, which makes separation between both species. Combination of intermittent and continuous lights were applied at the FAD fishery ground. Reactions of both Bigeye and Skipjack to the light stimuli were tracked with coded pingers. Some preliminary results will be discussed.



  • Presentation
  • Video
Online user: 2 RSS Feed