Piovano, S., G. Basciano, Y. Swimmer, C. Giacoma [email protected] The proven effectiveness of a bycatch reduction technology (BRT) does not guarantee its adoption by fishermen. This case study evaluated the willingness of Sicilian longline fishermen to use relatively large circle hooks (16/0) as a BRT for loggerhead sea turtles (Caretta caretta). Fishermen tested circle hooks […]
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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 […]
Behavioral responses of minke whales (Balaenoptera acutorostrata) to experimental fishing gear in a coastal environment | Consortium for Wildlife Bycatch Reduction
Kot, B.W., R. Sears, A. Anis, D.P. Nowacek, J. Gedamke, and C.D. Marshall Journal of Experimental Marine Biology and Ecology Elsevier, Amsterdam, The Netherlands Lead author: Brian W. Kot, [email protected] This investigation involved systematic trials and controls testing for behavioral responses of minke whales (N=42) to experimental fishing gear in a coastal environment. A remote sensing system was […]
Comparison of circle hook and J hook catch rate for target and bycatch species taken in the Korean tuna longline fishery during 2005-2006 | Consortium for Wildlife Bycatch Reduction
Kim, S.-S., An, DH., Moon, D.Y., and Hwang, S.-J. Western and Central Pacific Fisheries Commission National Fisheries Research and Development Institute, Busan, Korea Tests were conducted on tuna longline fishing vessels in the eastern Pacific Ocean to determine if the use of J (size 4.0 traditional) or circle hooks (sizes 15, 16 and 18) and […]
Hawaii longline tuna fishery temporal trends in standardized catch rates and length distributions and effects on pelagic seamount ecosystems | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on August 24, 2015 – 17:28 All tuna species had higher catches rates when wider circle hooks were used. Shortfin spearfish and striped marlin catch rates were lower with circle hooks. No differences in average length between hook types. Reduced sea turtle interactions likely due to use of circle and not J […]
A comparison of circle hook and J hook performance in a western equatorial Atlantic Ocean pelagic longline fishery | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on August 24, 2015 – 15:50 Equatorial Atlantic Ocean Bigeye tuna had higher catch rates when circle hooks were used Catch rates were lower for leatherback sea turtles and pelagic stingrays but not sailfish when circle hooks were used Bony Fishes Skates/Rays Demochelys coriacea (Leatherback sea turtle)
Development and testing of a release panel for sharks and non-target finfish in purse seine gear | Consortium for Wildlife Bycatch Reduction
Itano, D., Muir, J., Hutchinson, M. and Leroy, B. Western and Central Pacific Fisheries Commission Pelagic Fisheries Research Program University of Hawaii An experimental release panel was installed in purse seine nets to determine their ability to release both silky sharks and non-target finfish. The release panels (5.5 m wide, extending down from the corkline […]
A comparison of catches of swordfish, Xiphias gladius, and other pelagic species from Canadian longline gear configured with alternating monofilament and multifilament nylon gangions | Consortium for Wildlife Bycatch Reduction
Heath H. Stone Biological Station Fisheries and Oceans Canada 531 Brandy Cove Road St. Andrews, New Brunswick, Canada [email protected] Tests were conducted aboard Canadian longline vessels targeting swordfish to determine if there were differences in the catch rates and size composition of swordfish and bycatch species caught by monofilament and multifilament nylon gangions. No significant […]
Hawaii longline tuna fishery temporal trends in standardized catch rates and length distributions and effects on pelagic seamount ecosystems | Consortium for Wildlife Bycatch Reduction
Gilman, E., Chaloupka, M., Read, A., Dalzell, P., Holetschek, J. and Curtice, C. Aquatic Conservation: Marine and Freshwater Ecosystems Analyses of the Hawaiian pelagic longline fishery were conducted to determine what factors, including hook type (J or circle) and location (sea mount v open ocean), have impacted the catch of both target and bycatch species. […]
Comparison of circle hooks and J hooks in the catch rate of target and bycatch species taken in the Korean tuna longline fishery | Consortium for Wildlife Bycatch Reduction
Kim, S., Moon, D., An, D. and Koh, J. Western and Central Pacific Fisheries Commission National Fisheries Research Development Institute, Republic of Korea Experiments were conducted aboard Korean pelagic longline vessels to determine if there were differences in the catch rates of target (tuna and billfish) and bycatch (sharks and other bony fish) species between […]
Development and observations of spiny dogfish Squalus acanthias reduction device in a raised footrope silver hake Merluccius bilinearis trawl | Consortium for Wildlife Bycatch Reduction
Chosid, D.M., Pol, M., Szymanski, M., Mirarchi, F. and Mirarchi, A. [email protected], [email protected], [email protected], [email protected], [email protected] An excluder grate (grid) was tested in the silver hake trawl fishery in Massachusetts Bay to determine it’s effectiveness in reducing spiny dogfish bycatch. The effects of color (white or black), angle and direction of the 50 mm spaced […]
Bycatch and release of pelagic megafauna in industrial trawler fisheries off Northwest Africa | Consortium for Wildlife Bycatch Reduction
Zeeberg, J., Corten, A., Graff, E. The addition of a filter grid (inclined at ca. 20 degrees) that leads to an escape tunnel in trawl nets allowed 100% of rays and turtles to escape, 75% of manta rays, 40% of billfish and between 20-75% of sharks to escape. http://www.xs4all.nl/~jzeebe1/Mauritanie_Zeeberg.pdf
A comparison of circle hook and J hook performance in a western equatorial Atlantic Ocean pelagic longline fishery | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on August 24, 2015 – 15:50 Equatorial Atlantic Ocean Bigeye tuna had higher catch rates when circle hooks were used Catch rates were lower for leatherback sea turtles and pelagic stingrays but not sailfish when circle hooks were used Bony Fishes Skates/Rays Demochelys coriacea (Leatherback sea turtle)
Experiment to Evaluate Gear Modification on Rates of Sea Turtle Bycatch in the Swordfish Longline Fishery in the Azores Phase 4 | Consortium for Wildlife Bycatch Reduction
Bolton, A. and K. Bjorndal Final Project Report submitted to the U.S. National Marine Fisheries Service. Archie Carr Center for Sea Turtle Research, University of Florida, Gainesville Japanese tuna hook 3.6mm S/S caught significantly more loggerhead sea turtles than non-offset 16/0 and 18/0 circle hooks and caught more turtles in the throat than the circle […]