Life in a Brazilian floodplain river:

Millions of people around the world depend on highlyproductive floodplain rivers for food and recreationalfishing. The SÃ Pds. o Francisco River, a river drainagesoutheast of the Amazon River, has a major fisheries onmigratory fishes that crashed in the 1990s. Many believe thatthe fisheries collapse was due to a lack of floods. However,the dependence of SÃ Pds. o Francisco River migratoryfishes on floods is poorly understood. In this book, wepresent scientific-based data to aid in understanding thelife history of migratory fishes, particularly in relation tofloods. We radio-tracked two species to characterize theirmigrations and spawning. We also monitored radio-tagged fishmovements to test the hypothesis that the cool hypolimneticdischarge from Três Marias Dam blocked theirupriver migration. Further, we used ichthyoplankton samplingof fishes, and hydrological, and economic data to develop aconceptual model for supplemental water releases from theTrês Marias Reservoir to restore successfulspawning and the downstream fisheries. The contents of thisbook will be of interest to fish biologist, fisheriesmanagers, and graduate students.... Mehr