@article{fdi:010064683,
  title = {{L}arge-scale examination of spatio-temporal patterns of drifting {F}ish {A}ggregating {D}evices (d{FAD}s) from tropical tuna fisheries of the {I}ndian and {A}tlantic {O}ceans},
  author = {{M}aufroy, {A}lexandra and {C}hassot, {E}mmanuel and {J}oo, {R}ocio and {K}aplan, {D}avid},
  editor = {},
  language = {{ENG}},
  abstract = {{S}ince the 1990s, massive use of drifting {F}ish {A}ggregating {D}evices (d{FAD}s) to aggregate tropical tunas has strongly modified global purse-seine fisheries. {F}or the first time, a large data set of {GPS} positions from buoys deployed by {F}rench purse-seiners to monitor d{FAD}s is analysed to provide information on spatio-temporal patterns of d{FAD} use in the {A}tlantic and {I}ndian {O}ceans during 2007-2011. {F}irst, we select among four classification methods the model that best separates "at sea" from "on board" buoy positions. {A} random forest model had the best performance, both in terms of the rate of false "at sea" predictions and the amount of over-segmentation of "at sea" trajectories (i.e., artificial division of trajectories into multiple, shorter pieces due to misclassification). {P}erformance is improved via post-processing removing unrealistically short "at sea" trajectories. {R}esults derived from the selected model enable us to identify the main areas and seasons of d{FAD} deployment and the spatial extent of their drift. {W}e find that d{FAD}s drift at sea on average for 39.5 days, with time at sea being shorter and distance travelled longer in the {I}ndian than in the {A}tlantic {O}cean. 9.9% of all trajectories end with a beaching event, suggesting that 1,500-2,000 may be lost onshore each year, potentially impacting sensitive habitat areas, such as the coral reefs of the {M}aldives, the {C}hagos {A}rchipelago, and the {S}eychelles.},
  keywords = {{OCEAN} {INDIEN} ; {ATLANTIQUE}},
  booktitle = {},
  journal = {{P}los {O}ne},
  volume = {10},
  numero = {5},
  pages = {e0128023 [21 p.]},
  ISSN = {1932-6203},
  year = {2015},
  DOI = {10.1371/journal.pone.0128023},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064683},
}