@inproceedings{fdi:010091466, title = {{M}ultifrequency acoustics measurements during the {PIRATA} {FR}25 cruise in the {E}astern tropical {A}tlantic {O}cean [r{\'e}sum{\'e}]}, author = {{H}abasque, {J}{\'e}r{\'e}mie and {B}ourl{\`e}s, {B}ernard and {M}achu, {E}ric and {B}rehmer, {P}atrice}, editor = {}, language = {{ENG}}, abstract = {{A}coustic tools allow a simultaneous acquisition of quantitative and qualitative data at different spatio-temporal scales, providing information about biotic and abiotic ecosystem components. {F}or the first time in 18 years history, a {PIRATA} cruise allowed to get such measurements in the {E}astern tropical {A}tlantic, from {C}abo-{V}erde islands to the equator and in the {G}ulf of {G}uinea. {W}e present here first data sets acquired during the {P}irata-{FR}25 cruise and some preliminary results. {S}everal potential scientific analyses could be carried out using such data in the general framework of {PREFACE}, {AWA} & {PIRATA} programs. {S}uch data will allow calibrating and validating ecosystem model developed in the {G}ulf of {G}uinea, taking into account the mesopelagic compartment. {T}he organization of the micronekton layers could be described including diel vertical migration taking into account hydrological parameters and currents vertical distributions. {L}astly, such data will allow characterizing the micronekton layers according to equatorial zonal currents system as well as inside the {G}uinea {D}ome. {A}long the survey path several other oceanographic structures were susceptible to trigger an effect on micronektonic layers as the contrasted salinity (32 to 36 ?) within the {G}ulf of {G}uinea, oceanic fronts and {T}ropical instability waves.}, keywords = {{AFRIQUE} {DE} {L}'{OUEST} ; {ATLANTIQUE} ; {GOLFE} {DE} {GUINEE}}, numero = {}, pages = {64}, booktitle = {{PREFACE}-{PIRATA}-{CLIVAR} {T}ropical {A}tlantic {V}ariability {C}onference}, year = {2015}, URL = {https://www.documentation.ird.fr/hor/fdi:010091466}, }