@incollection{fdi:010017255,
  title = {{P}elagic fish abundance from {S}emarang ({C}entral {J}ava) to {S}outh {C}hina {S}ea in {A}pril 1993},
  author = {{P}etit, {D}idier and {N}ugroho, {D}. and {P}otier, {M}ichel},
  editor = {},
  language = {{ENG}},
  abstract = {{A}n acoustic survey, from {S}emarang towards the {S}outh {C}hina {S}ea, allows the haline situation and the distribution of abundance in pelagic fishes at the end of the wet season to be described. {A}t that moment, the fleet of {J}avanese seiners operates in the south-west of the {N}atuna {I}slands, in depths of 50 meters. {T}he analysis of haline vertical profiles shows the presence of three zones : the {J}ava {S}ea with vertical gradients due to the coastal desalinization, the {K}arimata {S}trait with isohaline water at 33.5% and the {S}outh {C}hina {S}ea with deep waters at 34%. {T}he last sector where the fleet was operating, was three times richer than the {J}avanese waters at that time. {W}ithout direct correlation with that, the zonation of the abundance (scattered or aggregated fishes) follows the zonation of salinity. {T}he water of the strait is poorer, and the water of the {J}ava {S}ea is richer while the desalinization is stronger. {I}t seems that the richness of water is particularly related to the bathymetry by the presence of an semipelagic fauna when the bottom exceeds 30 meters. {T}his semipelagic fauna commutes twice migration towards the surface during the night, a behaviour which is more accentuated in this fishing zone than in the {J}ava {S}ea. {I}n the {K}arimata {S}trait, where the depth is less than 30 meters, the pelagic and benthic faunas are dominant. {I}n the {J}ava {S}ea, a great aggregation of larva and juveniles has been detected particularly in the {S}outh of {B}elitung {I}sland, that confirms the role of the basin in the reproduction of pelagic species. {A}t that period of the year, it is the slopes of the basin which seem to be richer. {T}hese populations, thus, avoid the strong coastal desalinization and also its deeper part. {A}ll these observations do not seem to confirm the theory of {H}ardenberg, which assumes the existence of a migration between the {S}outh {C}hina {S}ea and the {J}ava {S}ea. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{RESSOURCES} {HALIEUTIQUES} ; {POISSON} {MARIN} ; {ESPECE} {PELAGIQUE} ; {SALINITE} ; {DENSITE} {DE} {POPULATION} ; {VARIATION} {SPATIALE} ; {REPARTITION} {VERTICALE} ; {RYTHME} {NYCTHEMERAL} ; {PROSPECTION} {ACOUSTIQUE} ; {ABONDANCE} ; {BANC} ; {INDONESIE} ; {MER} {DE} {JAVA} ; {MER} {DE} {CHINE} {SUD}},
  booktitle = {{P}roceedings of acoustics seminar {AKUSTIKAN} 2},
  numero = {},
  pages = {159--170},
  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:010017255},
}