%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A MacMillan, I.
%A Attrill, M. J.
%A Imzilen, Taha
%A Lett, Christophe
%A Walmsley, S.
%A Chu, C.
%A Kaplan, David
%T Spatio-temporal variability in drifting Fish Aggregating Device (dFAD) beaching events in the Seychelles Archipelago
%D 2022
%L fdi:010085186
%G ENG
%J ICES Journal of Marine Science
%@ 1054-3139
%K abandoned lost or otherwise discarded fishing gear (ALDFG) ; coral reefs ; marine conservation ; marine litter ; purse seine ; tropical tuna ; fisheries
%K SEYCHELLES ; OCEAN INDIEN
%M ISI:000800321000001
%P [14 ]
%R 10.1093/icesjms/fsac091
%U https://www.documentation.ird.fr/hor/fdi:010085186
%> https://www.documentation.ird.fr/intranet/publi/2022-07/010085186.pdf
%V [Early access]
%W Horizon (IRD)
%X Purse-seine fisheries use drifting Fish Aggregating Devices (dFADs), human-made floating objects, to facilitate the capture of tropical tunas. Currently, the majority of dFADs are constructed primarily of highly durable non-biodegradable materials and there is no legal obligation to recover dFADs after deployment, leading to beaching events and potentially negative environmental impacts. We assessed beachings as a function of intra- and inter-annual trends, water depth, distance from land, seasonality, and benthic habitat within the local context of the Seychelles Archipelago using trajectories of dFADs deployed by French purse seiners over 2008-2020. Overall, 3842 beaching events associated with 2371 distinct dFAD tracking buoys were identified. Beachings occurred most frequently during the winter monsoon (December-March). Due to the shallow Mahe Plateau, beachings occurred in both nearshore (<= 5 km from land) and offshore (> 5 km) regions, predominantly in estimated depths less than 60 m. Despite representing < 20% of overall mapped habitat, the benthic habitat "Coral/Algae" had the highest beaching rate (35.3% of beachings), and therefore, beachings pose a significant concern for conservation. Our results provide a detailed view of the spatio-temporal pattern of beachings in the Seychelles, supporting the development of mitigation and prevention methods to reduce marine debris and perturbations to the marine environment.
%$ 040 ; 036 ; 021 ; 020