SS1.06 The Ecological Impacts of Pelagic Longline Fisheries
Date: Monday, June 10, 2002
Time: 4:00:00 PM
Location: Carson A
 
BoggsCH, NOAA National Marine Fisheries Service Southwest Fisheries Science Center , Honolulu, USA, christofer.boggs@noaa.gov
 
FISHING EXPERIMENTS ON REDUCING PELAGIC LONGLINE INTERACTIONS WITH PROTECTED SPECIES
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Longline fishing gear set near the sea surface to target swordfish, a mixture of swordfish and tunas, or dolphin fishes is used by a variety if fisheries including the U.S. North Pacific fishery. The rate of fishing gear interactions with protected species in shallow-set fisheries is high because baited hooks are exposed within the typical foraging range of albatrosses and sea turtles. Fishing experiments have shown that albatross interactions can be greatly reduced by trailing streamers that prevent easy approach of the birds to the baited hooks. Other successful mitigation methods include increasing the sink rate of baited hooks and dying bait blue with food coloring. Mitigating sea turtle interactions is more challenging, but techniques being tested in the U. S. fishery include blue dyed bait and moving branch lines farther away from floats. Fisheries observers report that most turtles are caught on the branch lines closest to floats, whereas these branch line have only average success in capturing target fish species. The ultimate goal of this work is to export successful mitigation techniques to fisheries beyond U.S. jurisdiction. SS1-06 CS03 CS07 ORAL BOGGS, C. H.