@article{fdi:010089503,
  title = {{C}omparative analysis of day and night micronekton abundance estimates in west {P}acific between acoustic and trawl surveys},
  author = {{B}arbin, {L}. and {L}ebourges {D}haussy, {A}nne and {A}llaín, {V}. and {R}eceveur, {A}. and {L}ehodey, {P}. and {H}abasque, {J}{\'e}r{\'e}mie and {V}ourey, {E}. and {P}ortal, {A}. and {R}oudaut, {G}ildas and {M}enk{\`e}s, {C}hristophe},
  editor = {},
  language = {{ENG}},
  abstract = {{M}icronekton organisms are a central component of the trophic organization in the pelagic ecosystem, being prey to top predators and participating in the export of carbon from the surface to the deep layers. {D}espite their importance, the abundance estimates and species distribution of micronekton remain largely uncertain. {T}his study aimed to compare and assess two sampling methods classically used for the estimation of micronekton abundance in mesopelagic acoustic scattering layers: scientific echosounder and trawl sampling. {M}easurements of 38 and 70 k{H}z hull-mounted echosounders were examined with biological trawl samples from 8 surveys in the {S}outh-{W}est tropical {P}acific. {A} model of acoustic observation was built from the trawl sampling species composition and forward scattering models. {P}redicted and observed acoustic responses are compared to assess the variability and the difference between the acoustic and trawl sampling methods in various scattering layers, for day and night periods. {T}he difference between methods decreased with depth and with increasing abundance of fish with swimbladders caught in trawls. {N}otably, this difference was found to be minimal in the nocturnal deep scattering layer (mesopelagic zone, depth>200 m). {T}his study emphasizes potential lower estimates of organisms' abundance by trawling and a bias towards mesopelagic fish. {U}nderstanding the differences between methods and their variability within different scattering layers is essential for studying micronekton and improving the precision of biomass estimates.},
  keywords = {{T}ropical {P}acific ; {S}cattering models ; {M}esopelagic fish ; {T}arget strength ; {S}cattering layers ; {PACIFIQUE} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{D}eep-{S}ea {R}esearch {P}art {I} : {O}ceanographic {R}esearch {P}apers},
  volume = {[{E}arly access]},
  numero = {},
  pages = {104221 [14 p.]},
  ISSN = {0967-0637},
  year = {2024},
  DOI = {10.1016/j.dsr.2023.104221},
  URL = {https://www.documentation.ird.fr/hor/fdi:010089503},
}