@article{fdi:010088637,
  title = {{H}ow technical change has boosted fish aggregation device productivity in the {I}ndian {O}cean tuna fishery},
  author = {{T}idd, {A}. {N}. and {F}loc'h, {L}. and {I}mzilen, {T}aha and {T}olotti, {M}. and {D}agorn, {L}aurent and {C}apello, {M}anuela and {G}uillotreau, {P}atrice},
  editor = {},
  language = {{ENG}},
  abstract = {{E}xcess harvesting power can threaten the long-term sustainability of fisheries. {I}ndicators of excess harvesting capacity must include input-output-based estimates of economic production efficiency. {T}he increasing use of drifting {F}ish-{A}ggregating-{D}evices ({DFAD}s) has boosted fishing productivity in high-seas tuna fisheries, perhaps beyond the biological capacity of the stocks, and is an object of global debate. {W}e carried out a {D}ata {E}nvelopment {A}nalysis ({DEA}) of relative changes in production efficiencies of the {F}rench purse-seine fleet targeting tropical tuna in the western {I}ndian {O}cean using two fishing strategies: (1) on floating objects ({FOB}) and (2) free swimming schools ({FSC}) using tuna catch and effort data spanning 1992-2019. {W}e show that {FOB} fishing evolved dramatically through time with an estimated change of 3.6%yr(-1) (8.0%yr(-1) 2007-2019), in contrast to 2.1%yr(-1) for {FSC}. {W}hile the efficiency level in combining and using inputs has barely changed for {FOB} fishing, it means that all the growth in productivity comes from technical change for this strategy. {T}he dynamics is different for the {FSC} with a mixture of innovation and higher efficiency. {I}mmediate plans to improve input-based management in this region are needed to prevent further risks of overfishing to yellowfin ({T}hunnus albacares) and skipjack ({K}atsuwonus pelamis) tunas.},
  keywords = {{OCEAN} {INDIEN}},
  booktitle = {},
  journal = {{S}cientific {R}eports - {N}ature},
  volume = {13},
  numero = {1},
  pages = {17834 [13 ]},
  ISSN = {2045-2322},
  year = {2023},
  DOI = {10.1038/s41598-023-45112-4},
  URL = {https://www.documentation.ird.fr/hor/fdi:010088637},
}