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The authors conducted field studies off the coast of Iceland to measure the response of humpback whales (Megaptera noveangliae) in their feeding grounds to a whale pinger and seal scarer (acoustic deterrents). Results indicate that whale pingers caused a significant increase in humpback swimming speed and a significant decrease in surface feeding, and that seal scarers caused no significant, consistent behavioral changes.  Additionally, the authors conducted a field trial of whale pingers on a capelin purse seine; the pingers did usually deter whales from the purse seine, and the two times that whales entered the net, the pingers combined with crew responsiveness seemed to aid their escape. Whale pingers can be a useful humpback whale entanglement mitigation tool, but they should be used only short-term so as to avoid reduced fitness consequences.

The authors conducted field studies off the coast of Iceland to measure the response of humpback whales (Megaptera noveangliae) in their feeding grounds to a whale pinger and seal scarer (acoustic deterrents). Results indicate that whale pingers caused a significant increase in humpback swimming speed and a significant decrease in surface feeding, and that seal scarers caused no significant, consistent behavioral changes.  Additionally, the authors conducted a field trial of whale pingers on a capelin purse seine; the pingers did usually deter whales from the purse seine, and the two times that whales entered the net, the pingers combined with crew responsiveness seemed to aid their escape. Whale pingers can be a useful humpback whale entanglement mitigation tool, but they should be used only short-term so as to avoid reduced fitness consequences.

This study reports on trials investigating the use of white Light Emitting Diodes (LEDs) to improve target catch and reduce nontarget catch in northern shrimp  (Pandalus borealis) and Norway lobster (Nephrops norvegicus) pot fisheries. Illuminated pots led to a significantly higher catch per unit effort (CPUE) of northern shrimp, but levels were still not commercially viable. LEDs also resulted in higher juvenile poor cod (Trisopterus minutus) bycatch and reduced Norway lobster (Nephrops norvegicus) catch. LEDs on nets may be promising for increasing CPUE and an alternative to trawl fisheries for northern shrimp.

This study reports on trials investigating the use of white Light Emitting Diodes (LEDs) to improve target catch and reduce nontarget catch in northern shrimp  (Pandalus borealis) and Norway lobster (Nephrops norvegicus) pot fisheries. Illuminated pots led to a significantly higher catch per unit effort (CPUE) of northern shrimp, but levels were still not commercially viable. LEDs also resulted in higher juvenile poor cod (Trisopterus minutus) bycatch and reduced Norway lobster (Nephrops norvegicus) catch. LEDs on nets may be promising for increasing CPUE and an alternative to trawl fisheries for northern shrimp.

The authors evaluated the effectiveness of DDD®03H Dolphin Dissuasive Devices, or DDD pingers (an acoustic deterrent device) to reduce common dolphin (Delphinus delphis) bycatch in a demersal pair trawler in the Bay of Biscay. Results showed that the DDD pingers reduced common dolphin bycatch by more than 90%, and that common dolphin bycatch in this trawl fishery is related to fishing zone and depth, but not necessarily factors such as time of day and haul duration.

This summary study assessed data from pelagic longline fisheries and sea turtle bycatch across 40 nations in the year 2000. Analyses showed that ore than 200,000 loggerheads and 50,000 leatherbacks were likely taken as pelagic longline bycatch in 2000, which is not a sustainable level. 

This study utilized onboard observations and fishermen interviews to investigate seabird seasonal abundance and interactions with artisanal bottom-set net fisheries off the southern-eastern coast of mainland Portugal between 2020 and 2022. 25 species of seabirds were recorded as bycatch, with lesser black-backed and Yellow-legged gulls
(Larus fuscus and Larus michahellis) the most abundant. Great shearwaters (Ardenna gravis) were caught more frequently in trammel nets during autumn, suggesting effects of both season and gear type. Fishermen interviews identified Northern gannets and Great cormorants (Phalacrocorax carbo)
as the most frequently bycaught species,

The authors used observer data to investigate variations in threatened species bycatch among individual operators with varying performance levels from five industrial fisheries in Australia. High-target and low-bycatch vessels were found in all five fisheries amongst varying gear types, and individual vessels were significant predictors of interaction rates. The authors suggest that fleet-wide bycatch reduction controls would be complemented through the use of measures that focus on individual performance groups.

The authors performed multuple analyses to assess northern fulmar (Fulmarus glacialis) bycatch and impacts from the Greenland halibut (Reinhardtius hippoglossoides) fishery in Arctic Canada. Results show that low to average levels of probable bycatch across fulmar populations will likely severely impede recovery or cause long-term declines of the northern fulmar populations in Arctic Canada, and that cumulative impacts of both southern and northern Canadian fisheries needed to be assessed for a more accurate understanding of the total impact. 

The authors interviewed 779 fishers to assess the bycatch of Humboldt penguins (Spheniscus humboldti) in small-scale surface and bottom gillnet and purse-seine fisheries in Peru and Chile. Results estimated 4,067 penguins were caught as bycatch in 2023 alone, with the highest rates associated with the following: gillnets, location of larger penguin colonies, larger mesh sizes, and certain target species (i.e.  corvina drum (Seriolella violacea) and Peruvian grunt (Anisotremus scapularis)). Bycatch was reported in both gear types, but fisher responses as to the state and fate of caught penguins was scant and variable.

 Results showed an estimated total of 4067 (±889 s.d.) penguins
caught in 2023, with the highest bycatch associated with gillnets. Ports such as Tambo de Mora and
San José in Peru and Coquimbo and San Antonio in Chile reported the most significant interactions.
Spatial mapping demonstrated that areas with the most common bycatch events coincide with
locations of larger penguin colonies. Multiple correspondence analysis revealed that larger mesh
sizes (3–5 in (7.6 - 12.7 cm)) and certain target species, such as corvina drum (Seriolella violacea)
and Peruvian grunt (Anisotremus scapularis), were strongly associated with reported bycatch event