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Illuminating gillnets to save seabirds and the potential for multi-taxa bycatch mitigation

Study Type
Field study in the wild
Location
Sechura Bay, Peru
Target catch
fish: (Paralichtys spp.), guitarfish (Rhinobatos planiceps), rays (superorder Batoidea
Effect on bycatch species
significant reduction (85.1% for guanay cormorants (Phalacrocorax bougainvillii))
Effect on target catch
none
Bycatch species
Seabirds
Reduction technique
Visual deterrents
Fishing Gear
Gillnets

Using a visual deterrent to reduce seabird interactions with gillnets

Study Type
Field study in the wild
Location
Berlengas Islands, Portugal
Target catch
fish, including hake (Merluccius merluccius), anglerfish (Lophius pescatorius), rays (Raja clavata, Raja brachyura) sole (Solea solea)
Effect on bycatch species
significant reduction, especially for gulls and northern gannets within 20m of the vessel
Effect on target catch
none
Bycatch species
Seabirds
Reduction technique
Visual deterrents
Fishing Gear
Gillnets

Using a visual deterrent to reduce seabird interactions with gillnets

Study Type
Field study in the wild
Location
Berlengas Islands, Portugal
Target catch
fish, including hake (Merluccius merluccius), anglerfish (Lophius pescatorius), rays (Raja clavata, Raja brachyura) sole (Solea solea)
Effect on bycatch species
significant reduction, especially for gulls and northern gannets within 20m of the vessel
Effect on target catch
none
Bycatch species
Seabirds
Reduction technique
Visual deterrents
Fishing Gear
Gillnets

Using a visual deterrent to reduce seabird interactions with gillnets

Study Type
Field study in the wild
Location
Berlengas Islands, Portugal
Target catch
fish, including hake (Merluccius merluccius), anglerfish (Lophius pescatorius), rays (Raja clavata, Raja brachyura) sole (Solea solea)
Effect on bycatch species
significant reduction, especially for gulls and northern gannets within 20m of the vessel
Effect on target catch
none
Bycatch species
Seabirds
Reduction technique
Visual deterrents
Fishing Gear
Gillnets

Behavioural Responses of Humpback Whales (Megaptera novaeangliae) to Two Acoustic Deterrent Devices in a Northern Feeding Ground off Iceland

Study Type
Field study in the wild
Location
Skjálfandi Bay and Eyjafjörður, Iceland
Target catch
none
Effect on bycatch species
swimming speed increased, surface feeding decreased
Effect on target catch
n/a
Bycatch species
Megaptera novaeangliae (Humpback whale)
Reduction technique
Acoustic deterrent devices

Behavioural Responses of Humpback Whales (Megaptera novaeangliae) to Two Acoustic Deterrent Devices in a Northern Feeding Ground off Iceland

Study Type
Field study in the wild
Location
Skjálfandi Bay and Eyjafjörður, Iceland
Target catch
none
Effect on bycatch species
swimming speed increased, surface feeding decreased
Effect on target catch
n/a
Bycatch species
Megaptera novaeangliae (Humpback whale)
Reduction technique
Acoustic deterrent devices

Behavioural Responses of Humpback Whales (Megaptera novaeangliae) to Two Acoustic Deterrent Devices in a Northern Feeding Ground off Iceland

Study Type
Field study in the wild
Location
Neskaupstaður, Iceland
Target catch
capelin
Effect on bycatch species
deterred from entering net, or if they enter, the surface pingers seemed to lead them toward escape
Effect on target catch
none when whales did not enter net, but catch was reduced when whales did enter net and escape
Bycatch species
Megaptera novaeangliae (Humpback whale)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Surrounding nets

Behavioural Responses of Humpback Whales (Megaptera novaeangliae) to Two Acoustic Deterrent Devices in a Northern Feeding Ground off Iceland

Study Type
Field study in the wild
Location
Neskaupstaður, Iceland
Target catch
capelin
Effect on bycatch species
deterred from entering net, or if they enter, the surface pingers seemed to lead them toward escape
Effect on target catch
none when whales did not enter net, but catch was reduced when whales did enter net and escape
Bycatch species
Megaptera novaeangliae (Humpback whale)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Surrounding nets

Behavioural Responses of Humpback Whales (Megaptera novaeangliae) to Two Acoustic Deterrent Devices in a Northern Feeding Ground off Iceland

Study Type
Field study in the wild
Location
Neskaupstaður, Iceland
Target catch
capelin
Effect on bycatch species
deterred from entering net, or if they enter, the surface pingers seemed to lead them toward escape
Effect on target catch
none when whales did not enter net, but catch was reduced when whales did enter net and escape
Bycatch species
Megaptera novaeangliae (Humpback whale)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Surrounding nets

Effects of illumination and pot design on catch and bycatch when targeting northern shrimp (Pandalus borealis) using white LED PotLights

Study Type
Field study in the wild
Location
Scotland
Target catch
northern shrimp (Pandalus borealis)
Effect on bycatch species
increase CPUE of northern shrimp
Effect on target catch
increase in poor cod (Trisopterus minutus)
Bycatch species
Bony Fishes
Reduction technique
Visual deterrents
Fishing Gear
Pots

Effects of illumination and pot design on catch and bycatch when targeting northern shrimp (Pandalus borealis) using white LED PotLights

Study Type
Field study in the wild
Location
Scotland
Target catch
northern shrimp (Pandalus borealis)
Effect on bycatch species
increase CPUE of northern shrimp
Effect on target catch
increase in poor cod (Trisopterus minutus)
Bycatch species
Bony Fishes
Reduction technique
Visual deterrents
Fishing Gear
Pots
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