@incollection{fdi:010017252, title = {{D}ensities and behaviour of pelagic fish population along the {J}ava and {S}umatra coasts in wet season}, author = {{P}etit, {D}idier and {C}otel, {P}ascal and {N}ugroho, {D}.}, editor = {}, language = {{ENG}}, abstract = {{T}he coastal borders of northern {J}ava and eastern {S}umatra have been prospected during the acoustic surveys, in the depth of about 115 to 50 m, in wet season. {T}he measures of relative density per nautical mile, the vertical distribution of the abundance and shoals have been analyzed. {T}he general characteristics can be drawn-up : they are the extension of an abundant semipelagic fauna occupying the bathymetric strata from 25 to 45 m, and the existence of a dominant pelagic fauna are more coastal. {S}hoals, low reverberating, are present in all areas but are dominant in the coastal border ; the more reverberating aggregations are more off shore. {F}rom the {E}ast to the {W}est, their bathymetric localization increases in the sectors near oceanic influences, they are more dense and near the surface. {F}rom the {E}ast to the {W}est, the abundance of schools and total density decrease. {T}his fact seemingly has to do with the extension of the relatively shallow zone. {T}wo sectors show a particularity : the {B}ay of {S}emarang with densities sometimes big, which could be related to the seasonal topography, and the surroundings of the {S}unda {S}trait, zone of passage and exchange for the deep pelagic population. {T}hese observations globally confirm the stratification tentative which was carried out during the {W}orkshop of 1994, in specifying the geographical extension of the coastal stratum, very narrow in front of {J}ava, and in proposing that one part of the semipelagic population which constitutes the wealth of the {E}ast of {J}ava in dry season, should migrate in wet season towards the slopes of the coastal border. ({R}{\'e}sum{\'e} d'auteur)}, keywords = {{RESSOURCES} {HALIEUTIQUES} ; {ZONE} {COTIERE} ; {POISSON} {MARIN} ; {ESPECE} {PELAGIQUE} ; {DENSITE} {DE} {POPULATION} ; {REPARTITION} {VERTICALE} ; {ETHOLOGIE} ; {RYTHME} {NYCTHEMERAL} ; {VARIATION} {SAISONNIERE} ; {SAISON} {HUMIDE} ; {ZONATION} {ECOLOGIQUE} ; {INDONESIE} ; {JAWA} {NORD} ; {SUMATERA} {EST}}, booktitle = {{P}roceedings of acoustics seminar {AKUSTIKAN} 2}, numero = {}, pages = {91--107}, 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:010017252}, }