@article{fdi:010094810, title = {{R}eliance and usage of anchored {F}ish {A}ggregating {D}evices (a{FAD}s) in the {I}ndonesian tuna fisheries}, author = {{H}argiyatno, {I}. {T}. and {W}udianto, and {D}agorn, {L}aurent and {S}atria, {F}. and {S}adiyah, {L}. and {S}imier, {M}onique and {H}utapea, {J}. {H}. and {W}idodo, {A}. {A}. and {C}apello, {M}anuela}, editor = {}, language = {{ENG}}, abstract = {{T}he development of tuna fisheries in the {I}ndian {O}cean is closely linked to the use of {F}ish {A}ggregating {D}evices ({FAD}s). {W}hile {FAD}s increase fishing efficiency, their sustainability raises concerns. {I}nformation on {FAD} utilization, particularly in {I}ndonesia, remains limited. {T}his study investigates {I}ndonesia's anchored {FAD}s (a{FAD}s) tuna fisheries through a semi-structured survey of 293 tuna fishers using {FAD}s in eight major {I}ndonesian fishing ports in the {I}ndian {O}cean. {W}ith the exception of one group of handline vessels that use lights to attract tuna and operate at night, all other groups (purse seiners, troll-line, and handline vessels) utilize a{FAD}s in over 90 % of their tuna-targeted fishing operations. {A}ll a{FAD}s were reported to be privately owned, either by vessel captains, vessel owners, fishing associations, or companies, with a{FAD} sharing primarily occurring within the same a{FAD} ownership group. {O}n average, vessels or groups of vessels owned between 1 a{FAD} (hook and line vessels) to 8 a{FAD}s (purse seiners). a{FAD} arrays reported by respondents showed an average of 4-5 a{FAD}s within 10 nm of the a{FAD}s they utilize. {L}ong a{FAD} lifetimes (2-4 years on average) indicated the skilled knowledge of fishers in using and maintaining these devices. {I}nterestingly, the number of a{FAD}s visited by fishing vessels was not correlated with the trip duration and remained relatively low (< 16 a{FAD}s visited for all vessels). {T}his suggests that vessels tend to exploit the same a{FAD} array throughout their trip, even when it lasts several months. {L}anding data supported these findings and revealed seasonal patterns in a{FAD} use, including partial shifts in target species for hook and line vessels. {T}he findings of this study are expected to provide quantitative insights and contribute to the sustainable management of tuna {FAD} fisheries in {I}ndonesia and the {I}ndian {O}cean.}, keywords = {{T}una ; {A}nchored {FAD}s ; {I}ndonesia ; {S}mall-scale fisheries ; {M}anagement ; {INDONESIE}}, booktitle = {}, journal = {{R}egional {S}tudies in {M}arine {S}cience}, volume = {89}, numero = {}, pages = {104362 [13 ]}, ISSN = {2352-4855}, year = {2025}, DOI = {10.1016/j.rsma.2025.104362}, URL = {https://www.documentation.ird.fr/hor/fdi:010094810}, }