Underwater sound-emitting devices (maximum level of intensity equivalent to approximately 175 dB re 1 µPa @ 1m) attached to fishing gear, principally gillnets. ADD’s such as acoustic pingers are now mandated for use in some fisheries in the U.S. Northwest Atlantic, California driftnet, and in Europe. The sound of these devices is believed to alert […]
October 2022
International Marine Mammal – Longline Bycatch Mitigation Workshop | Consortium for Wildlife Bycatch Reduction
Tuesday, October 22, 2013 to Friday, October 25, 2013 Mortality from longline bycatch threatens marine mammal species and populations such as the false killer whale (Pseudorca crassidens) in the insular Hawaiian Islands, and Risso’s dolphin (Grampus griseus) and pilot whales (Globicephala spp.) in the Northwest Atlantic. Fishermen also lose valuable target catch due to marine […]
A whale alarm fails to deter migrating humpback whales: an empirical test | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on March 30, 2016 – 17:30 Cape Solander, Sydney Australia A whale alarm fails to deter migrating humpback whales: an empirical test No detectable differences in behavior was found between when alarms turned on or off. Megaptera novaeangliae (Humpback whale) Acoustic deterrent devices
Field Study | Consortium for Wildlife Bycatch Reduction
Submitted by Kate McClellan on July 30, 2012 – 14:51 Central Mediterranean Sea Reducing longline bycatch: the larger the hook, the fewer the stingrays 16/0 circle hooks significantly reduced stingray catch
Reducing longline bycatch: the larger the hook, the fewer the stingrays | Consortium for Wildlife Bycatch Reduction
Piovano, S., S. Clo, and C. Giacoma Pelagic stingrays (Pteroplatytrygon violacea) are a common bycatch species in the Mediterranean pelagic longline swordfish fishery. Experimental trials took place in the central Mediterranean Sea from 2005 to 2007 to investigate the importance of bait size, presence and type of light attractors, and hook size and shape on […]
Effectiveness of mitigation measures to reduce interactions between commercial fishing gear and whales | Consortium for Wildlife Bycatch Reduction
How, J., Coughran, D., Smith, J., Double, M., Harrison, J., McMath, J., Hebiton, B. and A. denham Fisheries Research Report The authors investigated several data sources and conducted surveys to identify potential mitigation measures that could be used to reduce humpback whale entanglements in Western Australia (WA). The Cetacean Stranding Database (CSD) and Commercial Whale […]
Field Study | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on July 12, 2012 – 15:09 Evaluation of turtle exclusion and escapement devices for hoop-nets Chimney-net design did not reduce the number of average size of flathead catfish Chimney-net design significantly reduced (84%) the bycatch of turtles
Factors affecting elasmobranch escape from turtle excluder devices (TEDs) in a tropical penaeid-trawl fishery. | Consortium for Wildlife Bycatch Reduction
Submitted by lweiss on February 13, 2020 – 11:23 Tiger prawn (Penaeus semisulcatus and P. esculentus) and endeavor prawn (Metapenaus endeavouri and M. ensus) TEDs facilitated the escape of large elasmobranchs, with bar spacing and TED orientation acting as important design factors affecting escape.
Physical and psychological deterrence strategies to mitigate odontocete by-catch and depredation in pelagic longline fisheries: progress report | Consortium for Wildlife Bycatch Reduction
Hamer, D.J., Childerhouse, S.J. Progress report to Pacific Islands Forum Fisheries Agency, World Wildlife Fund South Pacific, and Pacific Islands Tuna Industry Association Two devices were designed to prevent odontocetes from depredating caught fish and putting themselves at-risk of becoming bycatch. One device used physical deterrence by shouding the fish with a barrier and the […]
Field Study 769 | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on January 14, 2013 – 17:12 Skipjack and yellowfin tuna Fewer skipjack tuna were caught by number and weight. Yellowfin tuna catch was higher. Double-FADS caught larger bigeye tunas but the catch rate was slightly less than on normal FAD sets.
Long-term effectiveness, failure rates, and “dinner-bell” properties of acoustic pingers in a gillnet fishery | Consortium for Wildlife Bycatch Reduction
Carretta, JV and Barlow, J Marine Technology Society Journal [email protected] [email protected] The long-term effectiveness of acoustic pingers in reducing marine mammal bycatch was assessed in the California swordfish and thresher shark drift gillnet fishery. Bycatch was observed at sea between 1990 and 2009, with acoustic pingers being present from 1996 to 2009. Bycatch rates of […]
Incremental fishing gear modifications fail to significantly reduce large whale serious injury rates | Consortium for Wildlife Bycatch Reduction
Pace, R.M., Cole, T.V.N., and A. G. Henry Endangered Species Research The annual counts of large whale entanglements (including serious injury and mortalities) were analyzed and used to assess the effectiveness of the Atlantic Large Whale Take Reduction Plan. Fishing gear entanglements related to the annual number of mortality events averaged 2.5 for right whales […]
Comparison of bycatch species captured during daytime and nighttime: preliminary results of longline experiments carried out in the Seychelles waters | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on September 30, 2015 – 14:08 Differences in the species composition, quantity and depth of capture for bycatch species All marketable species were caught in the 150 m layer during day and night sets.
Permanent magnets reduce bycatch of benthic sharks in an ocean trap fishery | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on July 19, 2018 – 15:25 New South Whales, Australia Permanent magnets reduce bycatch of benthic sharks in an ocean trap fishery Increased target catch rates Significantly reduced interactions with elasmobranchs Electromagnetic deterrents