Unanswered Forum Topics

This is a meta-analysis that quantified the effects of 42 technical measures on the target catch and the bycatch of seabirds, elasmobranchs, marine mammals and sea turtles, evaluating which methods were most effective at mitigating bycatch of each fauna group. Overall, mitigation methods reduced bycatch while having no statistically significant effect on the target catch, and sensory-based measures (e.g. pingers, blue-dyed bait) generally outperformed physical-based measures (e.g. circle hook, larger mesh) in reducing  bycatch.

This study analyzed Chinese pelagic tuna longline observer data from 2010 to 2018 to determine catch composition of Atlantic targeting bigeye tuna (Thunnus obesus) and bluefin tuna (Thunnus thynnus), as well as the status and discard rate common bycatch species. A total of 55 species were observed as bycatch, and the most common was shark species. The catch composition of the bigeye tuna fishery varies significantly from that of bluefin tuna. 

This study analyzed Chinese pelagic tuna longline observer data from 2010 to 2018 to determine catch composition of Atlantic targeting bigeye tuna (Thunnus obesus) and bluefin tuna (Thunnus thynnus), as well as the status and discard rate common bycatch species. A total of 55 species were observed as bycatch, and the most common was shark species. The catch composition of the bigeye tuna fishery varies significantly from that of bluefin tuna. 

This study analyzed Chinese pelagic tuna longline observer data from 2010 to 2018 to determine catch composition of Atlantic targeting bigeye tuna (Thunnus obesus) and bluefin tuna (Thunnus thynnus), as well as the status and discard rate common bycatch species. A total of 55 species were observed as bycatch, and the most common was shark species. The catch composition of the bigeye tuna fishery varies significantly from that of bluefin tuna. 

This study analyzed Chinese pelagic tuna longline observer data from 2010 to 2018 to determine catch composition of Atlantic targeting bigeye tuna (Thunnus obesus) and bluefin tuna (Thunnus thynnus), as well as the status and discard rate common bycatch species. A total of 55 species were observed as bycatch, and the most common was shark species. The catch composition of the bigeye tuna fishery varies significantly from that of bluefin tuna. 

This study analyzed Chinese pelagic tuna longline observer data from 2010 to 2018 to determine catch composition of Atlantic targeting bigeye tuna (Thunnus obesus) and bluefin tuna (Thunnus thynnus), as well as the status and discard rate common bycatch species. A total of 55 species were observed as bycatch, and the most common was shark species. The catch composition of the bigeye tuna fishery varies significantly from that of bluefin tuna. 

This study evaluated the cetacean interactions with a bottom-set net fishery along the mainland Portuguese Southern coast (Algarve) from 2018-2022. Depredation by bottlenose dolphins occurred in 17.7% of hauls, while bycatch occurred in <1%. Depredation was elevated in the spring and winter months and in gears targeting red mullet and hake. 

This study evaluated the cetacean interactions with a bottom-set net fishery along the mainland Portuguese Southern coast (Algarve) from 2018-2022. Depredation by bottlenose dolphins occurred in 17.7% of hauls, while bycatch occurred in <1%. Depredation was elevated in the spring and winter months and in gears targeting red mullet and hake. 

This study evaluated the cetacean interactions with a bottom-set net fishery along the mainland Portuguese Southern coast (Algarve) from 2018-2022. Depredation by bottlenose dolphins occurred in 17.7% of hauls, while bycatch occurred in <1%. Depredation was elevated in the spring and winter months and in gears targeting red mullet and hake. 

This study evaluated the cetacean interactions with a bottom-set net fishery along the mainland Portuguese Southern coast (Algarve) from 2018-2022. Depredation by bottlenose dolphins occurred in 17.7% of hauls, while bycatch occurred in <1%. Depredation was elevated in the spring and winter months and in gears targeting red mullet and hake. 

This study evaluated the cetacean interactions with a bottom-set net fishery along the mainland Portuguese Southern coast (Algarve) from 2018-2022. Depredation by bottlenose dolphins occurred in 17.7% of hauls, while bycatch occurred in <1%. Depredation was elevated in the spring and winter months and in gears targeting red mullet and hake. 

This study evaluated the cetacean interactions with a bottom-set net fishery along the mainland Portuguese Southern coast (Algarve) from 2018-2022. Depredation by bottlenose dolphins occurred in 17.7% of hauls, while bycatch occurred in <1%. Depredation was elevated in the spring and winter months and in gears targeting red mullet and hake. 

This is a summary of case studies that were reviewed for efficacy of mitigation methods in gillnet fisheries for reducing seabird bycatch, focusing specifically on time-area restrictions and gear-switching. Both methods show promise to reduce bycatch and meet conservation standards, but a holistic approach that considers seabird behavior, target species  activity, and socioeconomic impacts is encouraged.

This is a summary of case studies that were reviewed for efficacy of mitigation methods in gillnet fisheries for reducing seabird bycatch, focusing specifically on time-area restrictions and gear-switching. Both methods show promise to reduce bycatch and meet conservation standards, but a holistic approach that considers seabird behavior, target species  activity, and socioeconomic impacts is encouraged.