01529naa a2200265 a 450000100080000000500110000800800410001910000180006024500920007826000090017052008470017965000110102665000090103765000160104665000130106265000100107565000100108565300140109565300150110965300110112465300260113570000230116170000190118477300600120318095542017-03-30       2001    bl ---       0--  u    #d1 aSUAREZ, Y. R.  aFactors determining the structure of fish communities in Pantanal lagoons (MS, Brazil).  c2001  aThe fish communities of lagoons in the Nhecolandia Pantanal were studied to determine the factors which are responsible for the composition and abundance of species. Fishes were collected in 19 lagoons during August 1997, after their isolation from the River Negro, using beach seines (15 x 1.5 m; 2 mm mesh). A total of 51 species were collected. In the lagoons, or in parts with dense macrophytes, a screened box trap was used. Fishing was also accomplieshed with hooks of several sizes. Species richness was estimated by the jack-knife procedure, after adjustment to the log-normal distribution and with von Bertalanfyy's equations (asymptotic). The most important factors in the community organization were macrophyte cover, piscivore abundance and depth of the lagoons. The role of these habitats in the Pantanal ecosystem was discussed.  aBrazil  afish  afloodplains  aPantanal  aLagoa  aPeixe  aCommunity  aComunidade  aLagoon  aPlanicie de inundacao1 aPETRERE JUNIOR, M.1 aCATELLA, A. C.  tFisheries Management and Ecologygv.8, p.173-186, 2001.