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Industrialization is an inducer of urban growth, which conducted in a disorderly manner causes undue occupation of the soil, bringing consequences to the preservation areas. The implications produced by improper occupation in the margins of watercourses produce as main results: the abbreviation of erosion, siltation of rivers, deterioration of water quality and the reduction of water and terrestrial biodiversity. This study analyzed preliminarily in the estuary of the river Paraíba the impact of degradation of Permanent Preservation Areas in the structure of fish populations, through the comparative study between two equivalent riverside and in different states of preservation. Using 320 meters of gillnets in each of the riverside held collections for the characterization of the local ichthyic composition. Through ecological indices such as abundance, richness, similarity, among others, it was possible to distinguish the fish fauna of the two sides. It is assumed that the good state of conservation of mangrove vegetation not degraded margin provides, the various species of fish, an environment complex, rich in food and shelter. It is recommended that this study will be conducted in the period of one year, taking into account seasonal changes in environmental parameters.

Impacto da degradação ambiental sobre a caracterização da ictiofauna do estuário do Rio Paraíba (Nordeste do Brasil)