@article{fdi:010091376,
  title = {{I}mpact of an eddy dipole of the {M}ozambique channel on mesopelagic organisms, highlighted by multifrequency backscatter classification},
  author = {{A}nnasawmy, {P}. and {R}oudaut, {G}ildas and {L}ebourges {D}haussy, {A}nne},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he impact of a cyclonic ({C}), an anticyclonic ({AC}) eddy and transition zone ({TZ}), which is the area between the two eddies, on acoustic groups representing various mesopelagic organisms, was investigated using a semi-supervised multifrequency classification approach (hereafter, {E}score algorithm). {T}he {E}score algorithm involved selecting regions of interest ({ROI}s) within multifrequency (18, 38, 70, and 120 k{H}z) echograms and classifying into four clusters or echo-classes using {S}v differences ({S}v18-38, {S}v70-38, and {S}v120-38). {A}coustic densities and diel vertical migration strength varied between the {AC}, {C}, and {TZ} according to the frequency. {T}he vertical stratification of temperature, salinity and fluorescence within the oceanographic structures had varied influences on the vertical structure of each echo-class which represent zooplankton-like organisms, small and large fish with swimbladders, and small and large siphonophores with pneumatophores. {T}he echo-classes within the {C} were influenced by surface fluorescence, whereas in the {AC} and {TZ}, the echo-classes were influenced by deeper fluorescence and strong {EKE}. {O}ur study provides new insights into the environmental variables within mesoscale and sub-mesoscale features impacting different groups of mesopelagic communities in the {I}ndian {O}cean.},
  keywords = {{OCEAN} {INDIEN}},
  booktitle = {},
  journal = {{PL}o{S} {O}ne},
  volume = {19},
  numero = {9},
  pages = {e0309840 [28 p.]},
  ISSN = {1932-6203},
  year = {2024},
  DOI = {10.1371/journal.pone.0309840},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091376},
}