The ectoparasites of Pseudoplatystoma fasciatum (surubí) and P. tigrinum (chuncuina) from Río Ichilo, from oxbow lakes in the Río Ichilo floodplain and from Río Beni were studied. Sampling was carried out between August 1996 and February 1997 and in August and September 1999. Overall, the ectoparasites from the skin, the branchial cavity, the fins and the gills of 163 P. fasciatum and of 42 P. ...

—The importance of floodplain lakes to tropical river systems is well established, but little is known about the function of these habitats in temperate river systems. We examined fish diversity, abundance, and reproduction within six oxbow lakes of the Kaskaskia River, Illinois, over 5 years and their relationship to 11 abiotic environmental variables. The lakes were hydrologically dynamic wit...