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The authors performed modeling on 10 years of logbook data to analyze environmental and operational factors that influence shark and odontocete depredation in the New Caledonian longline tuna fishery. Results suggest that there are "hotspots" of odontocete depredation, and that it is driven by environmental factors such as sea surface temperature and bathymetry, while shark depredation is driven by operational fisheries factors such as soaking time and number of hooks. Alterations such as reducing soaking time to under 12 hours, or setting limits on hooks to <1,750, could significantly reduce the likelihood of depredation. 

The authors developed a novel mitigation method for reducing seabird bycatch in gillnet fisheries in the Baltic Sea: looming-eyes buoys (LEB), an above-water visual deterrent. This method was trialed off of Sareemaa Island, Estonia, and was shown to reduce potential for long-tailed duck (Clangula hyemalis) bycatch by 20-30% within a 50m radius with a possible habituation effect within 62 days. These trials suggest that above-water visual deterrents such as LEBs could contribute to reduce seabird bycatch in combination with other management and mitigation measures. 

The authors tested the effectiveness of using green light emitting diodes (LEDs) on demeral, set gillnets in Constante, Peru as a visual deterrent to reduce seabird bycatch. When comparing illuminated nets to control nets, seabird bycatch was significantly lower and represented an 85.1% decline in guanay cormorant ((Phalacrocorax bougainvillii) bycatch. Target catch was not affected, suggesting that this mitigation technique may be an effective mitigation method for seabirds, the same way it seems to be effective for reducing sea turtle bycatch.

The authors tested the effectiveness of 'scarybird', a visual deterrent, to reduce seabird bycatch in bottom gillnet fisheries in Portugal. The scarybird is a raptor-shaped aerial device that is flown behind the stern of the boat up to  ~7m above sea level. The scarybird did successfully deter seabirds during fishing operations, especially within the closest 20m from the vessel where there was a significant reduction in gulls (Larus michahellis/fuscus, −56 %) and northern gannets (Morus bassanus, −72 %). Target catch was not affected, suggesting this mitigation measure could be an easily implementable device for any fishery gears where bird interactions occur close to the surface.

This paper suggests guidelines for evaluating artificial light in bycatch reduction devices (BRL) using a standardized, collaborative, multidisciplinary approach. The purpose is to improve data consistence to support future meta-analyses and inter-study comparisons, and to highlight areas where further research is needed most urgently, as BRLs are a promising and rapidly moving area of bycatch mitigation.

This paper provides guidelines to create POAs (plan of action) in response to the issue of ALDFG (abandoned, lost, and discarded fishing gear) worldwide across varying gear types , fishery scales, and management. These Action Plans are designed to assist fishery stakeholders in preparing to meet the more rigorous Marine Stewardship Council standards for ALDFG and ghost fishing.

The authors modeled 28 years of data to estimate the impact of entanglement on female North Atlantic right whale health, survival and reproduction. Results show that entangled whales were drastically more likely to experience negative health impacts, including declines in body condition and lower survival rates. Furthermore, whales in poor body condition were not reproductive- between 1994 and 2021, entanglements reduced the expected number of calves by 12.9% and the number of living females by 18.5%. The authors state that reducing entanglement risk is crucial in order for the population to recover. 

This letter briefly outlines actions taken by the five tuna regional fisheries management organizations (RFMOs) to reduce sea turtle bycatch in tuna and tuna-like fisheries. Recent initiatives include impact assessments, bycatch mitigation measures for pelagic fisheries, identification of sea turtle bycatch patterns in longline and perse seine tuna fisheries, and a joint tuna RFMO Bycatch Working Group meeting that took place in December 2019. 

The authors analyzed data regarding shark bycatch in western & central Pacific longline fisheries from 2013-2021, and the influence of environmental and spatial factors. Results suggest that several environmental factors- including oxygen concentration, sea surface temperature, and chlorophyll-a concentration- impact shark bycatch per unit effort (BPUE) for multiple shark species. Hotstops of bycatch were identified for bigeye thresher shark (Alopias superciliosus), longfin mako (Isurus paucus), silky shark (Carcharhinus falciformis), oceanic whitetip shark (Carcharhinus longimanus), blue shark (Prionace glauca) and shortfin mako (sIsurus oxyrinchus). All species exhibited annual variations in BPUE, and bycatch risk trended eastward toward equatorial waters, likely due to a higher concentration of fishing effort in those areas.

The authors compiled fishing effort data from a nearly 20 year period across 18 different longline, gillnet and purse seine fisheries in the eastern Pacific Ocean in order to assess/model vulnerability of leatherback sea turtles to fishing impacts under 70 different conservation management measure (CMM) scenarios. To do this, a new ecological risk assessment approach, the Ecological Assessment for the Sustainable Impacts of Fisheries (EASI-Fish), was used. The CMMs of large circle hooks, finfish bait, and best handling and release practices each decreased vulnerability, but the most effective scenarios used all three measures together. EASI-phish was used as the ecological risk assessment.