Active Forum Topics

Long-term effectiveness of pingers on a small population of finless porpoises in Japan

Study Type
Field study in the wild
Location
Omura Bay, Japan
Target catch
Not studied
Effect on bycatch species
Initially, pinger use decreased porpoise encounter rates with gillnets. However, this effect decreased over time but was effective later after temporary cessation of pinger use.
Effect on target catch
Not tested
Bycatch species
Neophocoena spp. (finless porpoise)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Gillnets

Long-term effectiveness of pingers on a small population of finless porpoises in Japan

Study Type
Field study in the wild
Location
Omura Bay, Japan
Target catch
Not studied
Effect on bycatch species
Initially, pinger use decreased porpoise encounter rates with gillnets. However, this effect decreased over time but was effective later after temporary cessation of pinger use.
Effect on target catch
Not tested
Bycatch species
Neophocoena spp. (finless porpoise)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Gillnets

Long-term effectiveness of pingers on a small population of finless porpoises in Japan

Study Type
Field study in the wild
Location
Omura Bay, Japan
Target catch
Not studied
Effect on bycatch species
Initially, pinger use decreased porpoise encounter rates with gillnets. However, this effect decreased over time but was effective later after temporary cessation of pinger use.
Effect on target catch
Not tested
Bycatch species
Neophocoena spp. (finless porpoise)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Gillnets

Testing two types of acoustic deterrent devices (pingers) to reduce harbour porpoise, Phocoena phocoena (Cetacea: Phocoenidae), bycatch in turbot (Psetta maxima) set gillnet fishery in the Black Sea, Turkey

Study Type
Field study in the wild
Location
Black Sea, Turkey
Target catch
Turbot (Psetta maxima)
Effect on bycatch species
No effect
Effect on target catch
No effect
Bycatch species
Phocoena phocoena (Harbor porpoise)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Gillnets

Testing two types of acoustic deterrent devices (pingers) to reduce harbour porpoise, Phocoena phocoena (Cetacea: Phocoenidae), bycatch in turbot (Psetta maxima) set gillnet fishery in the Black Sea, Turkey

Study Type
Field study in the wild
Location
Black Sea, Turkey
Target catch
Turbot (Psetta maxima)
Effect on bycatch species
No effect
Effect on target catch
No effect
Bycatch species
Phocoena phocoena (Harbor porpoise)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Gillnets

Testing two types of acoustic deterrent devices (pingers) to reduce harbour porpoise, Phocoena phocoena (Cetacea: Phocoenidae), bycatch in turbot (Psetta maxima) set gillnet fishery in the Black Sea, Turkey

Study Type
Field study in the wild
Location
Black Sea, Turkey
Target catch
Turbot (Psetta maxima)
Effect on bycatch species
No effect
Effect on target catch
No effect
Bycatch species
Phocoena phocoena (Harbor porpoise)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Gillnets

Development of acoustic deterrent device to mitigate seal fisheries interactions interim report

Study Type
Field study in the wild
Location
Ireland
Target catch
Pollock
Effect on bycatch species
Apparent decrease in interactions
Effect on target catch
No effect
Bycatch species
Gray seal (Halichoerus grypus atlantica)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Hooks-and-Lines

Development of acoustic deterrent device to mitigate seal fisheries interactions interim report

Study Type
Field study in the wild
Location
Ireland
Target catch
Pollock
Effect on bycatch species
Apparent decrease in interactions
Effect on target catch
No effect
Bycatch species
Gray seal (Halichoerus grypus atlantica)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Hooks-and-Lines

Development of acoustic deterrent device to mitigate seal fisheries interactions interim report

Study Type
Field study in the wild
Location
Ireland
Target catch
Pollock
Effect on bycatch species
Apparent decrease in interactions
Effect on target catch
No effect
Bycatch species
Gray seal (Halichoerus grypus atlantica)
Reduction technique
Acoustic deterrent devices
Fishing Gear
Hooks-and-Lines

The effects of hook and bait sizes on size selectivity and capture efficiency in Icelandic longline fisheries

Study Type
Field study in the wild
Location
Iceland
Target catch
Large bait decreased haddock catch and caught more large species except ling. Larger hooks lowered catch efficiency but had minimal effect in size selectivity
Effect on target catch
Large bait increased catch of large fish of all target species except for ling, and reduce catch of haddock. Increasing hook size decreased capture efficiency for all target fish species.Large bait decreased catch of small fish
Bycatch species
Bony Fishes
Reduction technique
Alternative bait
Hook size
Fishing Gear
Hooks-and-Lines

The effects of hook and bait sizes on size selectivity and capture efficiency in Icelandic longline fisheries

Study Type
Field study in the wild
Location
Iceland
Target catch
Large bait decreased haddock catch and caught more large species except ling. Larger hooks lowered catch efficiency but had minimal effect in size selectivity
Effect on target catch
Large bait increased catch of large fish of all target species except for ling, and reduce catch of haddock. Increasing hook size decreased capture efficiency for all target fish species.Large bait decreased catch of small fish
Bycatch species
Bony Fishes
Reduction technique
Alternative bait
Hook size
Fishing Gear
Hooks-and-Lines

The effects of hook and bait sizes on size selectivity and capture efficiency in Icelandic longline fisheries

Study Type
Field study in the wild
Location
Iceland
Target catch
Large bait decreased haddock catch and caught more large species except ling. Larger hooks lowered catch efficiency but had minimal effect in size selectivity
Effect on target catch
Large bait increased catch of large fish of all target species except for ling, and reduce catch of haddock. Increasing hook size decreased capture efficiency for all target fish species.Large bait decreased catch of small fish
Bycatch species
Bony Fishes
Reduction technique
Alternative bait
Hook size
Fishing Gear
Hooks-and-Lines

The effects of hook and bait sizes on size selectivity and capture efficiency in Icelandic longline fisheries

Study Type
Field study in the wild
Location
Iceland
Target catch
Large bait decreased haddock catch and caught more large species except ling. Larger hooks lowered catch efficiency but had minimal effect in size selectivity
Effect on target catch
Large bait increased catch of large fish of all target species except for ling, and reduce catch of haddock. Increasing hook size decreased capture efficiency for all target fish species.Large bait decreased catch of small fish
Bycatch species
Bony Fishes
Reduction technique
Alternative bait
Hook size
Fishing Gear
Hooks-and-Lines

Using vertical distribution to separate fish from crustaceans in a mixed species trawl fishery

Study Type
Field study in the wild
Location
Skagerrak, Norway
Target catch
Norway lobster (Nephrops norvegicus)
Effect on bycatch species
The majority of fish were separated successfully into the upper compartment
Effect on target catch
Not tested
Bycatch species
Bony Fishes
Reduction technique
Modified ground gear (mobile)
Fishing Gear
Trawls

Using vertical distribution to separate fish from crustaceans in a mixed species trawl fishery

Study Type
Field study in the wild
Location
Skagerrak, Norway
Target catch
Norway lobster (Nephrops norvegicus)
Effect on bycatch species
The majority of fish were separated successfully into the upper compartment
Effect on target catch
Not tested
Bycatch species
Bony Fishes
Reduction technique
Modified ground gear (mobile)
Fishing Gear
Trawls

Using vertical distribution to separate fish from crustaceans in a mixed species trawl fishery

Study Type
Field study in the wild
Location
Skagerrak, Norway
Target catch
Norway lobster (Nephrops norvegicus)
Effect on bycatch species
The majority of fish were separated successfully into the upper compartment
Effect on target catch
Not tested
Bycatch species
Bony Fishes
Reduction technique
Modified ground gear (mobile)
Fishing Gear
Trawls

The efficiency of sieve‐panels for bycatch separation in Nephrops trawls

Study Type
Field study in the wild
Location
Skagerrak, Norway
Target catch
Norway lobster (Nephrops norvegicus)
Effect on bycatch species
Bycatch of roundfish and flatfish was low
Effect on target catch
Optimal catch size of large Nephrops was too low for commercial use
Bycatch species
Bony Fishes
Reduction technique
Excluder devices
Fishing Gear
Trawls
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