@article{fdi:010061341,
  title = {{C}omparison of vertical mobile hydroacoustic survey strategies for monitoring fish distributions in the {G}ironde estuary ({F}rance)},
  author = {{S}amedy, {V}. and {J}osse, {E}rwan and {G}uillard, {J}. and {P}ierre, {M}. and {G}irardin, {M}. and {B}oet, {R}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}oday, hydroacoustic technologies are able to monitor fish populations and assess fish biomass by providing data of a high spatio-temporal resolution, and without damaging the environment. {S}uch techniques are widely used in lakes and marine environments, but they remain much less tested in shallow waters - especially in estuarine habitats. {O}ur study was carried out using a strictly methodological approach. {T}his was necessary in order to take into account the highly changeable nature of the ecosystem in question. {H}ydroacoustic surveys were conducted in the mesohaline part of the {G}ironde estuary using {SIMRAD} {EK}60 split-beam echosounders, operating simultaneously at two frequencies (70 k{H}z and 120 k{H}z). {D}ifferent mobile hydroacoustic surveys were tested in different seasons, with vertical acquisition, in order to compare variability of results due to the sampling strategy, and to validate the relevance of our design by repeating the surveys. {T}he results obtained on survey design choices gave similar outcomes when sampling was carried out with or against the current and between two mobile designs. {T}he comparison between flood and ebb tides gave different results from one day to another but we observed the same evolution for each flood tide or for each ebb tide on several successive days. {T}his acoustic study in the {G}ironde estuary was used to validate a reliable sampling mobile design. {I}t is the first step in the process of gaining a better understanding of estuarine ecosystems, an understanding that will be enhanced by combining our data with data from a variety of other sources.},
  keywords = {estuary ; vertical acoustic ; mobile methodology ; daytime sampling ; fisheries ; {FRANCE}},
  booktitle = {},
  journal = {{E}stuarine {C}oastal and {S}helf {S}cience},
  volume = {134},
  numero = {},
  pages = {174--180},
  ISSN = {0272-7714},
  year = {2013},
  DOI = {10.1016/j.ecss.2013.01.017},
  URL = {https://www.documentation.ird.fr/hor/fdi:010061341},
}