@inproceedings{fdi:010078253,
  title = {{E}ffect of environmental variables on the structure of micronectonic layers over the {S}enegalese continental shelf [r{\'e}sum{\'e}]},
  author = {{D}iogoul, {N}. and {B}rehmer, {P}atrice and {P}errot, {Y}annick and {T}iedemann, {M}. and {T}hiam, {A}. and {E}l {A}youbi, {S}. and {M}ouget, {A}nne and {M}igayrou, {C}. and {S}adio, {O}umar and {S}arr{\'e}, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he micronectonic organisms aggregate at specific depths and occur as scattering layer on echosounder records. {T}hey constitute an important component in the marine food web in direct contact with primary producers. {W}e characterized the {S}enegalese water masses of the '{P}etite c{\^o}te' on physicochemical and biological criteria using an in situ data set collected during an acoustics survey. {T}hen we described at fine scale spatial and temporal variation of micronektonic layers in relation with their environment. {T}wo areas with different characteristics have been discriminated: the upwelling's cell area and the upwelling's offshore area more stratified, warm and sharply separated from the other area by a strong thermal boundary. {T}he spatio-temporal variation of scattering layer's thickness of micronectonic is strongly influenced by depth and the time of the day. {T}he continental shelf scattering layer's thickness increases with depth, but no variation is reported in longitudinal plane. {I}n both areas nocturnal layers are thicker and deeper than diurnal ones. {T}he hydrological structure of the water column also influence the micronectonic scattering layer. {T}he scattering layer requires "stable" physical conditions which support vertical stratification. {I}n the upwelling's area cell, the chlorophyll-a ({CHL}) concentration is correlated to scattering layer thickness during night time. {I}n the upwelling's offshore area, sea temperature, water density and oxygen have a significant effect on the scattering layer's thickness during the nightime. {H}owever, during the daytime, {CHL} has a significant effect on the scattering layer's thickness. {T}his correlation between {CHL} and scattering layer thickness in the upwelling's offshore area during day could be explained by an inverse diel vertical migration of a micronectonic group. {O}n this basis we assume that trophic relationship between phytoplankton and micronecton operate during the day at the surface in this area.},
  keywords = {{AFRIQUE} {DE} {L}'{OUEST} ; {SENEGAL} ; {ATLANTIQUE}},
  numero = {},
  pages = {51},
  booktitle = {{I}nternational conference {ICAWA} 2017 and 2018 : extended book of abstract : the {AWA} project : ecosystem approach to the management of fisheries and the marine environment in {W}est {A}frican waters},
  year = {2019},
  ISBN = {978-9553602-0-06},
  URL = {https://www.documentation.ird.fr/hor/fdi:010078253},
}