@incollection{fdi:010017257,
  title = {{G}regariousness and school behaviour of pelagic fish : impact of the acoustics evaluation and fisheries},
  author = {{G}erlotto, {F}ran{\c{c}}ois},
  editor = {},
  language = {{ENG}},
  abstract = {{P}elagic fish ({C}lupeids, {C}arangids, {E}ngraulids, {S}combroids, etc.) are normally forming dense schools, gathering over tens of thousands of individuals. {T}his paper defines the concept of fish schools for fishery acoustics, and describes briefly their main dynamic mechanisms. {T}he kind of spatial distribution, due to this behaviour, makes the design of appropriate sampling methodologies necessary. {T}he effect of the heterogeneity in the spatial distribution of fish density is discussed. {T}he impact of gregariousness on the validity of acoustic data is described, as well as the main behavioural features : horizontal and vertical school avoidance, acoustic shadowing, diving and dial cycles are factors to be taken into account in the acoustic methodology. {U}nder some favourable conditions, these behavioural characteristics may help to improve the knowledge of a stock, and sometimes to identify the species. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{RESSOURCES} {HALIEUTIQUES} ; {POISSON} {MARIN} ; {ESPECE} {PELAGIQUE} ; {DENSITE} {DE} {POPULATION} ; {ETHOLOGIE} ; {BIOMASSE} ; {EVALUATION} ; {METHODOLOGIE} ; {SONAR} ; {BANC} {DE} {POISSONS}},
  booktitle = {{P}roceedings of acoustics seminar {AKUSTIKAN} 2},
  numero = {},
  pages = {233--252},
  address = {{L}uxembourg ({LUX}) ; {J}akarta ({IDN}) ; {P}aris},
  publisher = {{U}nion {E}urop{\'e}enne ; {CRIFI} ; {ORSTOM}},
  series = {},
  year = {1997},
  ISBN = {979-8186-64-8},
  URL = {https://www.documentation.ird.fr/hor/fdi:010017257},
}