Fisheries bycatch, in particular in tuna and tuna-like fisheries, is one of the main causes of sea turtle declines (Lewison et al., Reference Lewison, Crowder, Wallace, Moore, Cox and Zydelis2014). Godley et al. (Reference Godley, Broderick, Colman, Formia, Godfrey and Hamann2020) described some of the actions being carried out internationally for the sea turtle conservation. Although they acknowledged there have been efforts to understand the effects of commercial fisheries bycatch, they did not address ongoing initiatives for sea turtle bycatch. Here, we outline actions taken by tuna regional fisheries management organizations.

Scientific advice and the management of fisheries targeting tuna and tuna-like species are provided by tuna regional fisheries management organizations. In chronological order by founding, these are the Inter-American Tropical Tuna Commission (1949), the International Commission for the Conservation of Atlantic Tunas (1966), the Indo-Pacific Tuna Program (prior to 1980), the Indian Ocean Tuna Commission (1993), and the Western and Central Pacific Fisheries Commission (2004). These organizations, supported by their respective Scientific Committees, cover all the oceans and main seas (including most sea turtle ranges), are intergovernmental, and are responsible for data collection, monitoring and management of tuna and tuna-like resources, including associated bycatch.

The scientists working with these organizations provide annual information on turtle bycatch. There have been several recent initiatives, including impact assessments (Nel et al., Reference Nel, Wanless, Angel, Mellet and Harris2013; Angel et al., Reference Angel, Nel, Wanless, Mellet, Harris and Wilson2014; Williams et al., Reference Williams, Georgeson, Summerson, Hobday, Hartog and Fuller2018) and bycatch mitigation measures for pelagic fisheries management (Coelho et al., Reference Coelho, Fernandez-Carvalho and Santos2013). An example is the work of some contracting parties collaborating in the identification of sea turtle bycatch patterns in longline and purse seine tuna fisheries in the Atlantic Ocean, Mediterranean Sea and South Indian Ocean (Anon., 2020). Similarly, there have been a number of studies within the framework of other tuna regional fisheries management organizations, ranging from the initiatives of individual research groups to coordinated basin-scale or global initiatives. These efforts are illustrated by the Bycatch Mitigation Information System, launched by the Western and Central Pacific Fisheries Commission and later expanded and supported by the FAO Common Oceans Tuna Project (Fitzsimmons et al., Reference Fitzsimmons, Abraham, Caillot and Smith2019).

To continue reducing bycatch of non-target species, including sea turtles, the first joint tuna Regional Fisheries Management Organization Bycatch Working Group meeting was organized in December 2019 in Porto, Portugal, to rejuvenate the process of coordination between the organizations on bycatch issues (Anon., 2019).