@incollection{fdi:010064377,
  title = {{A}ggregative and schooling behaviour of small pelagic fish schools through echo type characteristics},
  author = {{B}rehmer, {P}atrice and {S}arr{\'e}, {A}. and {G}onzalez, {L}. and {C}otel, {P}ascal and {H}ermand, {J}.{P}. and {G}erlotto, {F}ran{\c{c}}ois},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n this work we compare the result obtained by in situ echosounder measurements on eastern {V}enezuelan and south {S}{\'e}n{\'e}gal coastal shelves where {S}ardinella aurita was the predominant species occurred in fish school structure. {T}he both stocks are known as genetically independent. {P}ersistent school typology was already described by {P}etitgas and {L}evenez (1996) analysing {S}enegalese echogram database. {W}e compiled and analyzed an acoustic database (7 surveys) of {V}enezuelan fish school populations. {T}he echo type typology encountered in the both countries is similar over the year. {O}n the others hand, two standardized acoustics surveys have been carried out in 1999, with the same research vessel and echosounder (38 k{H}z) in {S}{\'e}n{\'e}gal and {V}enezuela. {T}he 'echointegration by shoal' method was performed on the data collected on both stocks. {T}he observed fish school descriptors (energetic, morphologic and spatial) showed that the differentiation between day and night fish schools was mainly due to morphologic variables (fractal dimension). {I}n {V}enezuela the echo types were different between day and night as in {S}{\'e}n{\'e}gal, but on the entire diel cycle the quantitative and qualitative characteristics of fish schools were similar on both ecosystems. {B}oth acoustic fish school populations are similar; they are constituted by a same dominant species {S}ardinella aurita. {O}bservation of small pelagic fish school during the night is not unusual. {T}he schooling behaviour and the diel aggregative dynamics of small pelagic fish around the world are discussed according our result and literature review. {S}chool morphology appears to be common to large number of species, and aggregative dynamics, species dependent.},
  keywords = {{VENEZUELA} ; {SENEGAL} ; {ATLANTIQUE}},
  booktitle = {{IEEE}/{OES} {A}coustics in {U}nderwater {G}eosciences {S}ymposium ({RIO} {A}coustics)},
  numero = {},
  pages = {6},
  address = {{P}iscataway},
  publisher = {{IEEE}},
  series = {},
  year = {2013},
  DOI = {10.1109/{RIOA}coustics.2013.6683992},
  ISBN = {978-1-4799-0362-7},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064377},
}