@article{fdi:010064230, title = {{S}patial and temporal variability of zooplankton off {N}ew {C}aledonia ({S}outhwestern {P}acific) from acoustics and net measurements}, author = {{S}meti, {H}. and {P}agano, {M}arc and {M}enk{\`e}s, {C}hristophe and {L}ebourges {D}haussy, {A}nne and {H}unt, {B}. {P}. {V}. and {A}llain, {V}. and {R}odier, {M}artine and de {B}oissieu, {F}. and {K}estenare, {E}lodie and {S}ammari, {C}.}, editor = {}, language = {{ENG}}, abstract = {{S}patial and temporal distribution of zooplankton off {N}ew {C}aledonia in the eastern {C}oral {S}ea was studied during two multidisciplinary cruises in 2011, during the cool and the hot seasons. {A}coustic measurements of zooplankton were made using a shipborne acoustic {D}oppler current profiler ({S}-{ADCP}), a scientific echosounder and a {T}racor acoustic profiling system ({TAPS}). {R}elative backscatter from {ADCP} was converted to biomass estimates using zooplankton weights from net-samples collected during the cruises. {Z}ooplankton biomass was estimated using four methods: weighing, digital imaging ({Z}oo{S}can), {ADCP} and {TAPS}. {S}ignificant correlations were found between the different biomass estimators and between the backscatters of the {ADCP} and the echosounder. {T}here was a consistent diel pattern in {ADCP} derived biomass and echosounder backscatter resulting from the diel vertical migration ({DVM}) of zooplankton. {H}igher {DVM} amplitudes were associated with higher abundance of small zooplankton and cold waters to the south of the study area, while lower {DVM} amplitudes in the north were associated with warmer waters and higher abundance of large organisms. {Z}ooplankton was largely dominated by copepods (71-73%) among which calanoids prevailed (40-42%), with {P}aracalanus spp. as the dominant species (16-17%). {O}verall, zooplankton exhibited low abundance and biomass (mean night dry biomass of 4.72.2 mg m(3) during the cool season and 2.40.4 mg m(3) during the hot season) but high richness and diversity ({S}hannon index approximate to 4). {S}ubstantially enhanced biomass and abundance appeared to be episodically associated with mesoscale features contributing to shape a rather patchy zooplankton distribution.}, keywords = {{S}outh {P}acific ; acoustics ; zooplankton ; vertical migration ; water masses ; mesoscale dynamics ; {PACIFIQUE} ; {NOUVELLE} {CALEDONIE} ; {MER} {DE} {CORAIL}}, booktitle = {}, journal = {{J}ournal of {G}eophysical {R}esearch. {O}ceans}, volume = {120}, numero = {4}, pages = {2676--2700}, ISSN = {2169-9275}, year = {2015}, DOI = {10.1002/2014jc010441}, URL = {https://www.documentation.ird.fr/hor/fdi:010064230}, }