SPAWNING HABITAT OF MIGRATORY FISHES IN LOTIC ECOSYSTEMS:ABIOTIC CHARACTERIZATION
Keywords:fish migration, geomorphological characteristics, habitat rehabilitation, physical and chemical characteristics, spawning grounds.
Migratory fish species are the highly susceptible to environmental impacts as river fragmentation by dams and loss of habitats. For the implementation of reproduction habitat rehabilitation projects, information about the biotic characteristics of the spawning grounds are necessary. In this work, information of the geomorphological, hydrological and water quality characteristics of the spawning areas of migratory fishes distributed in several orders were reviewed and compared with Brazilian species. With the information found, we conclude that these studies on the spawning grounds of migratory fishes from the north hemisphere, are quite advanced, projecting a clear image of what environment in necessary for the reproduction. However in Brazil, they are still scarce, what precludes the delineation of management projects for the conservation of those species.