@article{fdi:010062653,
  title = {{F}ine-scale recognition and use of mesoscale fronts by foraging {C}ape gannets in the {B}enguela upwelling region},
  author = {{S}abarros, {P}. {S}. and {G}r{\'e}millet, {D}. and {D}emarcq, {H}erv{\'e} and {M}oseley, {C}. and {P}ichegru, {L}. and {M}ullers, {R}. {H}. {E}. and {S}tenseth, {N}. {C}. and {M}achu, {E}ric},
  editor = {},
  language = {{ENG}},
  abstract = {{O}ceanic structures such as mesoscale fronts may become hotspots of biological activity through concentration and enrichment processes. {T}hese fronts generally attract fish and may therefore be targeted by marine top-predators. {I}n the southern {B}enguela upwelling system, such fronts might be used as environmental cues by foraging seabirds. {I}n this study we analyzed high-frequency foraging tracks ({GPS}, 1 s sampling) of {C}ape gannets {M}orus capensis from two colonies located on the west and east coast of {S}outh {A}frica in relation to mesoscale fronts detected on daily high-resolution chlorophyll-a maps ({MODIS}, 1 km). {W}e tested the association of (i) searching behavior and (ii) diving activity of foraging birds with mesoscale fronts. {W}e found that {C}ape gannets shift from transiting to area-restricted search mode ({ARS}) at a distance from fronts ranging between 2 and 11 km (median is 6.7 km). {T}his suggests that {C}ape gannets may be able to sense fronts (smell or vision) or other predators, and that such detection triggers an intensified investigation of their surroundings (i.e. {ARS}). {A}lso we found that diving probability increases near fronts in 11 out of 20 tracks investigated (55%), suggesting that {C}ape gannets substantially use fronts for feeding; in the remaining cases (45%), birds may have used other cues for feeding including fishing vessels, particularly for gannets breeding on the west coast. {W}e demonstrated in this study that oceanographic structures such as mesoscale fronts are important environmental cues used by a foraging seabird within the rich waters of an upwelling system. {T}here is now need for further investigations on how {C}ape gannets actually detect these fronts.},
  keywords = {{S}eabird ; {E}nvironmental cue ; {B}ehavioral shift ; {A}rea-restricted search ; {F}eeding activity ; {F}ractal landscape ; {O}ceanographic fronts ; {M}orus capensis ; {S}outhern {B}enguela ; {S}outh {A}frica ; {AFRIQUE} {DU} {SUD} ; {BENGUELA}},
  booktitle = {},
  journal = {{D}eep-{S}ea {R}esearch {P}art {II} : {T}opical {S}tudies in {O}ceanography},
  volume = {107},
  numero = {},
  pages = {77--84},
  ISSN = {0967-0645},
  year = {2014},
  DOI = {10.1016/j.dsr2.2013.06.023},
  URL = {https://www.documentation.ird.fr/hor/fdi:010062653},
}