@article{fdi:010079446,
  title = {{S}eamount effect on circulation and distribution of ocean taxa in the vicinity of {L}a {P}erouse, a shallow seamount in the southwestern {I}ndian {O}cean},
  author = {{M}arsac, {F}rancis and {A}nnasawmy, {P}. and {N}oyon, {M}. and {D}emarcq, {H}erv{\'e} and {S}oria, {M}arc and {R}abearisoa, {N}jaratiana and {B}ach, {P}ascal and {C}herel, {Y}. and {G}relet, {J}acques and {R}omanov, {E}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he {L}a {P}erouse seamount (60 m depth) has so far been poorly studied despite it being a short distance (160 km) from {R}eunion {I}sland. {A}s part of the {MADR}idge project, a multidisciplinary cruise was conducted to evaluate the effect of this shallow seamount on the local hydrology and ecology. {C}urrent measurements, temperature and chlorophyll-a profiles, and mesozooplankton and micronekton samples were collected between the summit and 35 km away. {M}icronekton data were supplemented with stomach content of pelagic top predators as well as fisheries statistics from the domestic longline fleet operating from {R}eunion. {V}ertical current profiles revealed distinct patterns between the offshore and seamount-flanked stations, giving evidence of topographical induced flow instabilities, notably on its leeward side (west) relative to the east flank. {D}istinct patterns in temperature and chlorophyll-a vertical profiles suggest the formation of convergent and divergent circulation cells as a result of the irregular and crescent-like summit topography. {S}patial differences in zooplankton abundance were detected with higher biovolumes on the leeward flank. {T}he overall acoustic backscatter for micronekton over the summit was weaker than offshore, but highly concentrated in the upper layer. {A}lbacore tuna and swordfish dominate the longline catch west of {R}eunion, seemingly in association with a deep (900 m) topographic feature. {Y}et the largest catch is not directly associated with {L}a {P}erouse which would be too shallow for top predators to aggregate around in the long term. {E}nhanced levels of phytoplankton or zooplankton enrichment at {L}a {P}erouse were not demonstrated in this study, nor was there notable diversity of micronekton species. {T}his might explain the relatively limited importance of this seamount to the tuna fisheries in this region.},
  keywords = {{B}athymetry ; {M}esoscale eddies ; {L}-{ADCP} ; {M}esozooplankton ; {M}icronekton ; {S}tomach contents ; {P}elagic longline fisheries ; {OCEAN} {INDIEN} ; {REUNION} ; {LA} {PEROUSE} {MONT}},
  booktitle = {{B}io-physical coupling around three shallow seamounts in the {S}outh {W}estern {I}ndian {O}cean, with regional comparisons based on modelling, remote sensing and observational studies},
  journal = {{D}eep-{S}ea {R}esearch {P}art {II} : {T}opical {S}tudies in {O}ceanography},
  volume = {176},
  numero = {{N}o sp{\'e}cial},
  pages = {art. 104806 [18 ]},
  ISSN = {0967-0645},
  year = {2020},
  DOI = {10.1016/j.dsr2.2020.104806},
  URL = {https://www.documentation.ird.fr/hor/fdi:010079446},
}