@inproceedings{fdi:010067522,
  title = {{P}erformance of a low cost single beam echosounder : in situ trials in a shallow water coral reef habitat with verification by video},
  author = {{B}etanzos, {A}. and {M}artín, {H}.{A}. and {V}alle, {S}. and {T}izol, {R}. and {S}chneider, {P}. and {H}ernández, {J}.{L}. and {B}rehmer, {P}atrice and {L}inares, {E}.{O}. and {G}uillard, {J}. and {H}ermand, {J}.{P}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n a context of potential overexploitation of fisheries resources in the {S}abana-{C}amagüey {A}rchipelago ({C}uba), the {C}uban national authorities have expressed the need to collect more in situ information on fish of commercial interest in spawning areas. {A} newly developed low cost single-beam scientific echosounder has been recently acquired by the {C}uban {F}isheries {R}esearch {C}entre ({CIP}). {I}n this work, we provide first results of a comparative analysis carried out in the {S}abana-{C}amagüey {A}rchipelago ({C}uba), with the aim to evaluate the suitability of this type of echosounder as a tool for assessing fish aggregations in shallow waters. {T}o this end, data acquired with the single-beam {S}imrad {EK}15 (200 k{H}z) have been compared with data acquired with a split-beam {B}iosonics {DT}-{X} (208 k{H}z), the latter representing the standard system for comparison. {B}oth systems were calibrated following standard procedures and data have been analysed using {E}choview software. {T}he additional use of {CCTV} underwater video ("drop cam") allowed real-time monitoring of fish present in the study area. {I}dentification of fish species was possible due to the low water turbidity in the coral habitat and was performed using either video images or observations by divers. {F}ish schools and spawning aggregations of {L}utjanidae such as lane snapper ({L}utjanus synagris) were observed. {T}arget strength ({TS}) of individual fish was determined by using split-beam data of individuals from the edge of the school. {A}dditionally, existing knowledge of {TS} of some major tropical fish species in {C}uban waters provided the possibility to apply the regressions of {TS} versus size of fish and compare sizes with information available from fishermen in the area. {A} first synthesis of information available from all these different sources suggests the suitability of low-cost scientific echosounders as a tool to obtain valuable data on spawning aggregations on the {C}uban shelf to depths of about 50 m. {T}he use of a video syst- m simultaneously with hydroacoustic methods in clear and shallow waters proves to be a useful ground-truth tool to improve the reliability of this kind of assessments.},
  keywords = {{CUBA} ; {ATLANTIQUE}},
  numero = {},
  pages = {3},
  booktitle = {{IEEE}/{OES} {A}coustics in {U}nderwater {G}eosciences {S}ymposium ({RIO} {A}coustics)},
  year = {2015},
  DOI = {10.1109/{RIOA}coustics.2015.7473629},
  URL = {https://www.documentation.ird.fr/hor/fdi:010067522},
}