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Estimating fishing effort in small-scale fisheries using GPS tracking data and random forests ArchiMer
Behivoke, Faustinato; Etienne, Marie-pierre; Guitton, Jérôme; Randriatsara, Roddy Michel; Ranaivoson, Eulalie; Léopold, Marc.
During the last decade spatial patterns of industrial fisheries have been increasingly characterized using tracking technologies and machine learning analytical algorithms. In contrast, for small-scale fisheries, fishers’ behaviour for estimating and mapping fishing effort has only been anecdotally explored. Following a comparative approach, we conducted a boat tracking survey in a small-scale reef fishery in Madagascar and investigated the performance of a learning random forest algorithm and a speed threshold for estimating and mapping fishing effort. We monitored the movements of a sample of 31 traditional sailing fishing boats at around 45 s time interval using small GPS trackers. A total of 306 daily tracks were recorded among five gear types (beach...
Tipo: Text Palavras-chave: Boat movement; Fishery map; GPS track; Madagascar; Spatial data; Speed threshold.
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00669/78059/80289.pdf
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Zones fonctionnelles pour les ressources halieutiques dans les eaux sous souveraineté française. Deuxième partie : Inventaire. ArchiMer
Regimbart, Amelie; Guitton, Jérôme; Le Pape, Olivier.
Suite à l’adoption de la loi pour la reconquête de la biodiversité, de la nature et des paysages, une nouvelle catégorie d’Aire Marine Protégée, appelée "zone de conservation halieutique" (ZCH) a été créée, leur vocation étant de préserver ou de restaurer des zones fonctionnelles importantes pour le cycle de vie des ressources halieutiques. Le Ministère de l’Environnement, de l’Energie et de la Mer a donc souhaité faire répertorier les zones fonctionnelles halieutiques d’ores et déjà connues dans les eaux territoriales françaises. Pour chaque façade maritime métropolitaine, la seconde partie de ce travail, présentée dans ce rapport, s’est organisée en 4 étapes : - Dresser la liste des zones fonctionnelles halieutiques identifiées de manière quantitative...
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Ano: 2018 URL: https://archimer.ifremer.fr/doc/00652/76437/77524.pdf
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Are we ready to track climate‐driven shifts in marine species across international boundaries? ‐ A global survey of scientific bottom trawl data ArchiMer
Maureaud, Aurore; Frelat, Romain; Pécuchet, Laurène; Shackell, Nancy; Mérigot, Bastien; Pinsky, Malin L.; Amador, Kofi; Anderson, Sean C.; Arkhipkin, Alexander; Auber, Arnaud; Barri, Iça; Bell, Richard J.; Belmaker, Jonathan; Beukhof, Esther; Camara, Mohamed L.; Guevara‐carrasco, Renato; Choi, Junghwa; Christensen, Helle T.; Conner, Jason; Cubillos, Luis A.; Diadhiou, Hamet D.; Edelist, Dori; Emblemsvåg, Margrete; Ernst, Billy; Fairweather, Tracey P.; Fock, Heino O.; Friedland, Kevin D.; Garcia, Camilo B; Gascuel, Didier; Gislason, Henrik; Goren, Menachem; Guitton, Jérôme; Jouffre, Didier; Hattab, Tarek; Hidalgo, Manuel; Kathena, Johannes N.; Knuckey, Ian; Kidé, Saïkou O.; Koen‐alonso, Mariano; Koopman, Matt; Kulik, Vladimir; León, Jacqueline P; Levitt‐barmats, Ya’arit; Lindegren, Martin; Llope, Marcos; Massiot‐granier, Félix; Masski, Hicham; Mclean, Matthew; Meissa, Beyah; Mérillet, Laurene; Mihneva, Vesselina; Nunoo, Francis K. E.; O'Driscoll, Richard; O'Leary, Cecilia A.; Petrova, Elitsa; Ramos, Jorge E.; Refes, Wahid; Román‐marcote, Esther; Siegstad, Helle; Sobrino, Ignacio; Sólmundsson, Jón; Sonin, Oren; Spies, Ingrid; Steingrund, Petur; Stephenson, Fabrice; Stern, Nir; Tserkova, Feriha; Tserpes, Georges; Tzanatos, Evangelos; Rijn, Itai; Zwieten, Paul A. M.; Vasilakopoulos, Paraskevas; Yepsen, Daniela V.; Ziegler, Philippe; Thorson, James.
Marine biota are redistributing at a rapid pace in response to climate change and shifting seascapes. While changes in fish populations and community structure threaten the sustainability of fisheries, our capacity to adapt by tracking and projecting marine species remains a challenge due to data discontinuities in biological observations, lack of data availability, and mismatch between data and real species distributions. To assess the extent of this challenge, we review the global status and accessibility of ongoing scientific bottom trawl surveys. In total, we gathered metadata for 283,925 samples from 95 surveys conducted regularly from 2001 to 2019. We identified that 59% of the metadata collected are not publicly available, highlighting that the...
Tipo: Text Palavras-chave: Bottom trawl survey; Climate change; Demersal fish; Fisheries policy; Global data synthesis; Open science; Species distribution; Transboundary conservation.
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00658/76971/78197.pdf
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