RT journal article T1 Artisanal trawl fisheries as a sentinel of marine litter pollution A1 Viejo Marín, Josué A1 Cózar Cabañas, Andrés A1 Quintana Sepúlveda, Rocío A1 Martí Morales, Elisa A1 Markelain, Gorka A1 Cabrera Castro, Remedios A1 Muñoz Arroyo, Gonzalo A1 Montero, Enrique A1 Morales Caselles, María del Carmen A2 Biología K1 Marine litter K1 Fishing K1 Seabed K1 Trawling K1 COVID-19 K1 Gulf of Cadiz AB Systematic seafloor surveys are a highly desirable method of marine litter monitoring, but the high costs involved in seafloor sampling are not a trivial handicap. In the present work, we explore the opportunity provided by the artisanal trawling fisheries to obtain systematic data on marine litter in the Gulf of Cadiz between 2019 and 2021. We find that plastic was the most frequent material, with a prevalence of single-use and fishing-related items. Litter densities decreased with increasing distance to shore with a seasonal migration of the main litter hotspots. During pre-lockdown and post-lockdown stages derived from COVID-19, marine litter density decreased by 65 %, likely related to the decline in tourism and outdoor recreational activities. A continuous collaboration of 33 % of the local fleet would imply a removal of hundreds of thousands of items each year. The artisanal trawl fishing sector can play a unique role of monitoring marine litter on the seabed PB Elsevier SN 0025-326X YR 2023 FD 2023-04-11 LK http://hdl.handle.net/10498/28793 UL http://hdl.handle.net/10498/28793 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 11-nov-2026