@article{fdi:010079983,
  title = {{E}ffects of habitat modifications on the movement behavior of animals : the case study of {F}ish {A}ggregating {D}evices ({FAD}s) and tropical tunas},
  author = {{P}erez, {G}eraldine and {D}agorn, {L}aurent and {D}eneubourg, {J}. {L}. and {F}orget, {F}abien and {F}ilmalter, {J}. {D}. and {H}olland, {K}. and {I}tano, {D}. and {A}dam, {S}. and {J}auharee, {R}. and {B}eeharry, {S}. {P}. and {C}apello, {M}anuela},
  editor = {},
  language = {{ENG}},
  abstract = {{B}ackground {A}ggregation sites represent important sources of environmental heterogeneity and can modify the movement behavior of animals. {W}hen these sites are artificially established through anthropogenic actions, the consequent alterations to animal movements may impact their ecology with potential implications for their fitness. {F}loating objects represent important sources of habitat heterogeneity for tropical tunas, beneath which these species naturally aggregate in large numbers. {M}an-made floating objects, called {F}ish {A}ggregating {D}evices ({FAD}), are used by fishers on a massive scale to facilitate fishing operations. {I}n addition to the direct impacts that fishing with {FAD}s has on tuna populations, assessing the effects of increasing the numbers of {FAD}s on the ecology of tuna is key for generating sound management and conservation measures. {M}ethods {T}his study investigates the effects of increasing numbers of {FAD}s (aggregation sites) on the movements of tunas, through the comparison of electronic tagging data recorded from 146 individuals tunas (yellowfin tuna, {T}hunnus albacares, and skipjack tuna, {K}atsuwonus pelamis) tagged in three instrumented anchored {FAD} arrays ({M}auritius, {O}ahu-{H}awaii and {M}aldives), that differed according to their distances among neighboring {FAD}s. {T}he effect of increasing inter-{FAD} distances is studied considering a set of indices (residence times at {FAD}s and absence (travel) times between two visits at {FAD}s) and their trends. {R}esults {W}hen inter-{FAD} distances decrease, tuna visit more {FAD}s (higher connectivity between {FAD}s), spend less time travelling between {FAD}s and more time associated with them. {T}he trends observed for the absence (travel) times appear to be compatible with a random-search component in the movement behaviour of tunas. {C}onversely, {FAD} residence times showed opposite trends, which could be a result of social behavior and/or prey availability. {C}onclusion {O}ur results provide the first evidence of changes in tuna associative behavior for increasing {FAD} densities. {M}ore generally, they highlight the need for comparing animal movements in heterogeneous habitats in order to improve understanding of the impacts of anthropogenic habitat modifications on the ecology of wild animals.},
  keywords = {{A}coustic tagging ; {A}ssociative behavior ; {D}ensity of floating objects ; {M}ovement behavior ; {T}ropical tuna ; {ILE} {MAURICE} ; {HAWAII} ; {MALDIVES}},
  booktitle = {},
  journal = {{M}ovement {E}cology},
  volume = {8},
  numero = {1},
  pages = {47 [10p.]},
  ISSN = {2051-3933},
  year = {2020},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079983},
}