@article{fdi:010033843,
  title = {{S}imultaneous {S}v and {TS} measurements on {Y}oung-of-the-{Y}ear ({YOY}) freshwater fish using three frequencies},
  author = {{G}uillard, {J}. and {L}ebourges {D}haussy, {A}nne and {B}rehmer, {P}atrice},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n autumn, the fish population above the thermocline in {L}ake {A}nnecy mainly comprises young perch ({P}erca fluviatilis) of the year. {T}he fish are distributed in schools during the day and as scattered individual fish targets at night. {M}easurements of volume-backscattering strength and target strengths ({TS}) were carried out in a synchronous way using three echosounders operating at three frequencies (70, 120, and 129 k{H}z), with different characteristics (split beam, dual beam, beam shape, pulse length, etc.). {T}arget-strength values show variability from one elementary sampling unit to another and from one device to another, but the mean global {TS} values are similar, independently of the frequency. {T}he volume-backscattering strengths measured on precise schools by the three acoustic devices give significantly similar results. {A}coustic measurements on {YOY} perch are completely independent of the frequency and the characteristics of the echosounders.},
  keywords = {{POISSON} {D}'{EAU} {DOUCE} ; {ESTIMATION} {DE} {STOCK} ; {PROSPECTION} {ACOUSTIQUE} ; {SONAR} ; {DISTRIBUTION} {SPATIALE} ; {VARIATION} {JOURNALIERE} ; {METHODE} {D}'{ANALYSE} ; {ETUDE} {COMPARATIVE} ; {FRANCE} ; {ANNECY} {LAC}},
  booktitle = {},
  journal = {{ICES} {J}ournal of {M}arine {S}cience},
  volume = {61},
  numero = {2},
  pages = {267--273},
  ISSN = {1054-3139},
  year = {2004},
  DOI = {10.1016/j.icesjms.2003.11.007},
  URL = {https://www.documentation.ird.fr/hor/fdi:010033843},
}