Swimmer, Y., R. Arauz, B. Higgins, L. McNaughton, M. McCracken, J. Ballestero, and R. Brill. Marine Ecology Progress Series Although effective with captive loggerhead (Caretta caretta) and Kemp˙s ridley (Lepiochelys kempii) sea turtles, blue dyed bait is not effective in reducing olive ridley (Lepidochelys olivacea) and green sea turtle (Chelonia mydas) bycatch in longline fisheries […]
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Interactions between free-ranging dolphins (Tursiops truncatus) and passive acoustic gill-net deterrent devices | Consortium for Wildlife Bycatch Reduction
Goodson, A.D. and R.H. Mayo In: R.A. Kastelien, J.A. Thomas, and P.E. Nachtigall, eds. Sensory Systems of Aquatic Mammals De Spil Publishers, Woerden, The Netherlands ISBN 90-72743-05-9 Passive acoustic deterrents increased avoidance actions of bottlenose dolphins (Tursiops truncatus) to barriers simulating surface-set gillnets in the Moray Firth, Scotland.
Do pingers reduce interactions between bottlenose dolphins and nets around the Balearic Islands? | Consortium for Wildlife Bycatch Reduction
Brotons, J.M., Munilla, Z., Grau, A.M., Rendell, L. Endangered Species Research A large scale pinger trial was conducted and results showed a 49% decrease dolphin depredation rates when pingers were active. However the different pinger brands tried were not equally effective in reducing depredation. The AQUAmark 210 pingers had significant results, while Dukane Netmark 1000 […]
Behavioral responses of Sotalia fluviatilis (Cetacea, Delphinidae) to acoustic pingers, Fortaleza, Brazil | Consortium for Wildlife Bycatch Reduction
Montiero-Neto, C., Avila, F.J.C., Alves, T.T., Araujo, D.S., Campos, A.A., Martins, A.M.A., Parente, C.L., Furtado-Neto, M.A.A., Lien, J. Departamento de Biologia Marinha, Universidade Federal Fluminense, Caixa Postal 100.644, Niteroi, RJ 24001-970, Brazil E-mail: [email protected] Underwater acoustic pingers were tested in Brazil to evaluate the behavioral responses of tucuxi (Sotalia fluviatilis). Five pingers were evenly placed […]
Large-scale experiment shows that nylon leaders reduce shark bycatch and benefit pelagic longline fisheries | Consortium for Wildlife Bycatch Reduction
Ward, P., Lawrence, E., Darbyshire, R. and Hindmarsh, S. [email protected], [email protected] +612 6272 4163 Catch rates of blue marlin, snake mackerel and sharks were lower when nylon monofilament leaders, instead of wire leaders, were used on pelagic longline gear but bigeye tuna and black marlin catch rates increased. (No effect on yellowfin). Nylon leaders also […]
Post-release survival, vertical movements and thermal niche partitioning in five species pelagic sharks released from longline fishing gear in the central Pacific Ocean | Consortium for Wildlife Bycatch Reduction
Musyl MK, Brill RW, Curran DS, McNaughton LM, Kikkawa B, Fragoso N, Moyes CD Bruce C. Mundy Scientific Editor, Fishery Bulletin National Marine Fisheries Serivce Pacific Islands Fisheries Science Center Aiea Heights Research Facility 99-193 Aiea Heights Drive, Suite 417 Aiea, Hawaii 96701-3911 Bruce C. Mundy Scientific Editor, Fishery Bulletin National Marine Fisheries Serivce Pacific […]
Odontocete bycatch and depredation in longline fisheries: a review of available literature and of potential solutions | Consortium for Wildlife Bycatch Reduction
Hamer, D.J., Childerhouse, S.J., Gales, N.J. Odontocete (i.e. toothed whale) interaction with longline fisheries is a global phenomenon that threatens the status of some populations and the economic viability of longline fisheries. This review paper summarizes the trend and geographical extent of interactions, the potential impact on odontocetes and fisheries, and describes potential acoustic and […]
Fishing gear involved in entanglements of right and humpback whales | Consortium for Wildlife Bycatch Reduction
Johnson, A., Salvador, G., Kenney, J., Robbins, J., Kraus, S., Landry, S. and P. Clapham Entanglements of 31 right whales (Eubalaena glacialis) and 30 humpback whales (Megaptera novaeangliae) in the western North Atlantic were analyzed to identify the parts and types of gear involved. The results indicated that a large number of specific gear types […]
Apparent survival of North Atlantic right whales after entanglement in fishing gear | Consortium for Wildlife Bycatch Reduction
Robbins, J., Knowlton, A.R. and S. Landry [email protected] Documented entanglements, long-term population studies and mark-recapture studies were evaluated to determine the impact of cryptic mortality on North Atlantic right whales. Results suggest entangled adults had low initial survival (0.749). Adults that did survive the first year had survival rates similar (0.952) to those animals never […]
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 […]
Target strength of a nylon monofilament and an acoustically enhanced gillnet: predictions of biosonar detection ranges | Consortium for Wildlife Bycatch Reduction
Mooney, T.A., P.E. Nachtigall, and W.W.L. Au Metal oxide nets made from barium sulphate increased the detectability of gillnets by marine mammals when compared to nylon nets when approached at angles of incidence greater than normal incidence but less than 40 degrees. Hypothesized detection ranges indicate bottlenose dolphins (Tursiops truncatus) should be able to detect […]
Acoustic characterization of bycatch mitigation pingers on shark control nets in Queensland, Australia | Consortium for Wildlife Bycatch Reduction
Endangered Species Research Acoustic pingers, Fumunda F3 (2.7 kHz) for humpback whales and F10 (10 kHz) for dolphins, were used on sharks nets within the Queensland Shark Control Program. Sound from the acoustic pingers was present for around 1.5 km beyond the nets. Humpback whales and dugons were able to hear the F3 pinger 90 […]
Trade-offs in the Design of Fishery Closures: Management of Silky Shark Bycatch in the Eastern Pacific Ocean Tuna Fishery | Consortium for Wildlife Bycatch Reduction
Watson, J., T. Essington, C. Lennert-Cody, and M. Hall [email protected] Bycatch—the incidental catch of nontarget species—is a principal concern in marine conservation and fisheries management. In the eastern Pacific Ocean tuna fishery, a large fraction of nonmammal bycatch is captured by purse-seine gear when nets are deployed around floating objects. We examined the spatial distribution […]
A field experiment using acoustic alarms (pingers) to reduce harbour porpoise by-catch in bottom-set gillnets | Consortium for Wildlife Bycatch Reduction
Carlstrom, J., P. Berggren, F. Dinnetz, and P. Borjesson ICES Journal of Marine Science Pingers were tested to reduce harbour porpoise (Phocoena phocoena) bycatch in bottom-set gillnets in the Swedish Skagerrak Sea. During the experiment, no harbour porpoise were caught in control or experimental gillnets, possibly as a result of a combination of factors including […]