Trends and drivers of French tropical tuna purse-seine vessel behavior in the Atlantic and Indian Oceans, 2004–2020

IF 2.2 2区农林科学 Q2 FISHERIES

Fisheries Research Pub Date : 2025-03-17 DOI:10.1016/j.fishres.2025.107330

Wencheng Lau-Medrano , Daniel Gaertner , Francis Marsac , David M. Kaplan

{"title":"Trends and drivers of French tropical tuna purse-seine vessel behavior in the Atlantic and Indian Oceans, 2004–2020","authors":"Wencheng Lau-Medrano , Daniel Gaertner , Francis Marsac , David M. Kaplan","doi":"10.1016/j.fishres.2025.107330","DOIUrl":null,"url":null,"abstract":"<div><div>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 free-swimming 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 socio-economic 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.</div></div>","PeriodicalId":50443,"journal":{"name":"Fisheries Research","volume":"285 ","pages":"Article 107330"},"PeriodicalIF":2.2000,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fisheries Research","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0165783625000670","RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"FISHERIES","Score":null,"Total":0}

引用次数: 0

Abstract

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 free-swimming 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 socio-economic 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.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Fisheries Research 农林科学-渔业

CiteScore

4.50

自引率

16.70%

发文量

294

审稿时长

15 weeks

期刊介绍： This journal provides an international forum for the publication of papers in the areas of fisheries science, fishing technology, fisheries management and relevant socio-economics. The scope covers fisheries in salt, brackish and freshwater systems, and all aspects of associated ecology, environmental aspects of fisheries, and economics. Both theoretical and practical papers are acceptable, including laboratory and field experimental studies relevant to fisheries. Papers on the conservation of exploitable living resources are welcome. Review and Viewpoint articles are also published. As the specified areas inevitably impinge on and interrelate with each other, the approach of the journal is multidisciplinary, and authors are encouraged to emphasise the relevance of their own work to that of other disciplines. The journal is intended for fisheries scientists, biological oceanographers, gear technologists, economists, managers, administrators, policy makers and legislators.