Lau-Medrano W. auteur aut IRD Gaertner Daniel auteur aut IRD Marsac Francis auteur aut IRD Kaplan David auteur aut IRD text journalArticle eng text/pdf born digital access This study examines the spatio-temporal trends in fishing practices at the fishing trip scale of the French tropical tuna purse-seine fleet in the Indian and Atlantic Oceans on 17 years, focusing on trends in fishing on freeswimming schools (FSC) versus fishing on floating objects (FOBs). Key metrics, such as trip duration, median speed, sinuosity, area explored and the fraction of sets of FOBs, were calculated to quantify fishing trip patterns, and a PCA analysis was conducted to explore relationships between these metrics. Our findings show a marked shift towards FOB fishing, likely driven by advancements in tracking technology, which have improved fishing efficiency and reduced search time, and changes in regulations and fishing context, which have provided unintentional incentives for FOB fishing. The data reveal distinct trends between oceans, with shorter fishing trips and a higher rate of FOB fishing in the Indian Ocean, likely linked to recent increases in skipjack tuna abundance and catch limits on yellowfin tuna in that ocean. Temporal changes in fishing trip metrics suggest that the key factors influencing fishing strategies include oceanographic variability, management regulations, and socioeconomic conditions like piracy and fuel costs. Our analysis provides critical insights into how technological innovations and environmental factors shape fishing strategies, contributing to the sustainable management of tuna fisheries. specialized French purse-seine tuna fishery Fishing trips Atlantic and Indian Oceans Descriptive analysis on trends FRANCE ATLANTIQUE OCEAN INDIEN ZONE TROPICALE 040 082 285 107330 [12 p.] 2025 0165-7836 https://www.documentation.ird.fr/hor/fdi:010092933 10.1016/j.fishres.2025.107330 0165-7836 [F B010092933] https://www.documentation.ird.fr/hor/fdi:010092933 https://www.documentation.ird.fr/intranet/publi/2025-05/010092933.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2025-05-14 2025-11-04 fdi:010092933 fre