@article{fdi:010079853,
  title = {{D}rifting along in the open-ocean : the associative behaviour of oceanic triggerfish and rainbow runner with floating objects},
  author = {{F}orget, {F}abien and {C}owley, {P}. {D}. and {C}apello, {M}anuela and {F}ilmalter, {J}. {D}. and {D}agorn, {L}aurent},
  editor = {},
  language = {{ENG}},
  abstract = {{M}ultispecies aggregations at floating objects are a common feature throughout the world's tropical and subtropical oceans. {T}he evolutionary benefits driving this associative behaviour of pelagic fish remains unclear and information on the associative behaviour of non-tuna species remains scarce. {T}his study investigated the associative behaviour of oceanic triggerfish ({C}anthidermis maculata) and rainbow runner ({E}lagatis bipinnulata), two major bycatch species in the tropical tuna purse seine fishery, at floating objects in the western {I}ndian {O}cean. {A} total of 24 rainbow runner and 46 oceanic triggerfish were tagged with acoustic transmitters at nine drifting {FAD}s equipped with satellite linked receivers. {B}oth species remained associated with the same floating object for extended periods; {K}aplan-{M}eier survival estimates (considering the censored residence time due to equipment failure and fishing) suggested that mean residence time by rainbow runner and oceanic triggerfish was of 94 and 65 days, respectively. {D}uring daytime, the two species increased their home range as they typically performed short excursions (<2 h) away from the floating objects. {R}ainbow runner performed more excursions per unit time than oceanic triggerfish; the mean excursion index was 0.86 (+/- 0.8 {SD}) for oceanic triggerfish and 1.31 (+/- 1.1 {SD}) for rainbow runner. {A}mbient light intensity appears to be the stimulus triggering the onset and end of the associative modes. {T}he observed prolonged residency of these two major bycatch species suggests that they are more vulnerable to the tropical tuna purse seine gear than the targeted tuna species.},
  keywords = {{OCEAN} {INDIEN} ; {MOZAMBIQUE} {CANAL} ; {SEYCHELLES}},
  booktitle = {},
  journal = {{M}arine {E}nvironmental {R}esearch},
  volume = {161},
  numero = {},
  pages = {104994 [12 p.]},
  ISSN = {0141-1136},
  year = {2020},
  DOI = {10.1016/j.marenvres.2020.104994},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079853},
}