Petit Didier auteur aut IRD Cotel Pascal auteur aut IRD Nugroho D. auteur aut IRD text bookSection eng text/pdf reformatted digital access The coastal borders of northern Java and eastern Sumatra have been prospected during the acoustic surveys, in the depth of about 115 to 50 m, in wet season. The measures of relative density per nautical mile, the vertical distribution of the abundance and shoals have been analyzed. The 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. Shoals, low reverberating, are present in all areas but are dominant in the coastal border ; the more reverberating aggregations are more off shore. From the East to the West, their bathymetric localization increases in the sectors near oceanic influences, they are more dense and near the surface. From the East to the West, the abundance of schools and total density decrease. This fact seemingly has to do with the extension of the relatively shallow zone. Two sectors show a particularity : the Bay of Semarang with densities sometimes big, which could be related to the seasonal topography, and the surroundings of the Sunda Strait, zone of passage and exchange for the deep pelagic population. These observations globally confirm the stratification tentative which was carried out during the Workshop of 1994, in specifying the geographical extension of the coastal stratum, very narrow in front of Java, and in proposing that one part of the semipelagic population which constitutes the wealth of the East of Java in dry season, should migrate in wet season towards the slopes of the coastal border. (Résumé d'auteur) specialized RESSOURCES HALIEUTIQUES ZONE COTIERE POISSON MARIN ESPECE PELAGIQUE DENSITE DE POPULATION REPARTITION VERTICALE ETHOLOGIE RYTHME NYCTHEMERAL VARIATION SAISONNIERE SAISON HUMIDE ZONATION ECOLOGIQUE INDONESIE 036MILMAR02 Petit Didier ed. edt IRD Cotel Pascal ed. edt IRD Nugroho D. ed. edt IRD 91-107 Luxembourg (LUX) Union Européenne Jakarta (IDN) CRIFI Paris ORSTOM 1997 AKUSTIKAN : Seminar, 2., Bandungan (IDN), 1996/05/27-29 https://www.documentation.ird.fr/hor/fdi:010017252 979-8186-64-8 [F A010017245] https://www.documentation.ird.fr/hor/fdi:010017252 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/carton01/010017252.pdf IRD - Base Horizon / Pleins textes 1999-03-03 2018-06-15 fdi:010017252 fre