Submitted by lweiss on February 13, 2020 – 11:47 Ocean shrimp (Pandalus jordani) No change in average catch efficiency or length-dependent catch efficiency. Illumination reduced bycatch of eulachon (Thaleichthys pacificus) and yellowtail rockfish (Sebastes flavidus), but did not result in significant changes in the bycatch of other rockfish (Sebastes spp.) and flatfish
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Field Study 709 | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on August 23, 2012 – 12:35 Sock DMD did not affect catch rates of target species Sock DMD did not affect depredation. Shark depredation was higher Small Cetaceans (maximum length < 7.5 meters)
Field Study 371 | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on February 14, 2011 – 15:29 Trial 1, experimental net 1 caught 17% fewer prawns than the control net. Trial 2, experimental net 2 caught 2% fewer prawns than the control net. Trial 1, experimental net caught 44% fewer crabs and mantis shrimp and 49% fewer murex than control net. Trial 2, […]
Fishing gear modifications to reduce elasmobranch mortality in pelagic and bottom longline fisheries off Northeast Brazil | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on May 17, 2011 – 12:10 tuna (pelagic) and sharks (bottom) None reported for pelagic longlines. On bottom longlines, CPUE was higher for blacknose and nurse sharks and southern stingrays; no CPUE difference between hook type; more tiger and blacknose sharks were alive at haulback with circle hooks CPUE was significantly higher […]
Review and evaluation of three mitigation measures-bird-scaring line, underwater setting and line shooter-to reduce seabird bycatch in the north Atlantic longline fishery | Consortium for Wildlife Bycatch Reduction
Svein Lokkeborg, Institute of Marine Research, Fish Capture Division, PO Box 1870 Nordnes, N-5817 Bergen, Norway [email protected] Bird-scaring lines, underwater setting and line shooters all reduced the incidental capture of seabirds, with bird-scaring lines being the most effective. These mitigation measures also reduced bait loss and increased the catch rates of target species.
Reducing bycatch in coral reef trap fisheries: escape gaps as a step towards sustainability | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on September 29, 2015 – 07:35 Catches of high-value fish were not affected Short and tall gap traps reduced bycatch of bycatch fish by 74% and 80%, key herbivores by 58% and 50% and butterflyfish by 90% and 98%, respectively.
Reducing seabird bycatch in the South African joint venture tuna fishery using bird-scaring lines, branch line weighting and nighttime setting of hooks | Consortium for Wildlife Bycatch Reduction
Melvin, E.F., Guy, T.J. and Read, L.B. Washington Sea Grant University of Washington Box 355020 Seattle, WA 98195 [email protected] Several seabird bycatch mitigation techniques were tested aboard distant water tuna fisheries in the South African EEZ. Two types of bird scaring designs, light lines with short streams vs. hybrid lines with a mix of streamer […]
Field Study 318 | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on August 21, 2010 – 15:44 Spanish mackerel, menhaden, spot Did not reduce catch rates The proportion of hammer-wrapped bonnethead sharks was significantly higher in the 4″ unmodified net
Multivariate analysis of behavioral response experiments in humpback whales (Megaptera novaeangliae) | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on May 18, 2016 – 11:57 Humpback whales responded to ‘tones’ by moving offshore and surfacing more often, perhaps trying to avoid the stimuli. Responses to social sounds were more variable. Megaptera novaeangliae (Humpback whale) Acoustic deterrent devices Passive acoustic deterrents
Field Study 736 | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on October 8, 2012 – 08:35 The new “Newhaven” dredge caught significantly more queen scallops than the traditional dredge. There was no significant difference in the abundance of bycatch between the traditional and new “Newhaven” dredge design. Modified ground gear (mobile)
Field Study 793 | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on April 22, 2013 – 09:55 75% of market species were caught during day sets. 75% of bycatch species were caught during day sets, with lancetfish being the most common. Sharks were most common during night sets.
Escapement patterns of red mullet, sole, horse mackerel and hake facing two trawl selective devices | Consortium for Wildlife Bycatch Reduction
Submitted by lweiss on February 13, 2020 – 11:56 Norway lobster (Nephrops norvegicus), demersal fish Horse mackerel and hake escaped through the two devices tested. More sole were caught in the SMBRD than with standard gear. T90 mesh resulted in increased escape of red mullet.
Completion Report for Sturgeon Gillnet Study (number EA 133F-10-RQ-1160) | Consortium for Wildlife Bycatch Reduction
Fox, D., Armstrong J., and Brown, L. Monkfish in the US mid-Atlantic and northeast are targeted through sink gillnets that also capture Atlantic sturgeon. Large-mesh gillnets are required to fish seasonally using tie-downs as part of the Harbor Porpoise Take Reduction Plan. This study looked at the effects of tie-downs (control: 12 meshes x 30.5 cm stretch […]
A simple technical measure to reduce bycatch and discard of skates and sharks in mixed-species bottom-trawl fisheries | Consortium for Wildlife Bycatch Reduction
Submitted by morgaac on August 27, 2015 – 15:14 Catch rates for flatfish, haddock and whiting did not differ. Larger anglerfish were caught without the ‘tickler’ in place Removing the ‘tickler’ chain resulted in decreased catches of sharks and skates Modified ground gear (mobile)