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Spatial, temporal and diel variations of fish assemblages at two sandy beaches in the Sepetiba Bay, Rio de Janeiro, Brazil
Overall, temporal fluctuations act more at a specific level than at a structural one, and may be linked to some particular stages of the fish life cycle, but do not significantly influence the spatial organization. Expand
Effects of Landscape and Riparian Condition on a Fish Index of Biotic Integrity in a Large Southeastern Brazil River
Environmental conditions of a large river in southeastern Brazil were assessed by evaluating fish assemblage structure (index of biotic integrity, IBI), landscape use (forest, pasture, urban area,Expand
Fish assemblages as indicators of water quality in the middle Thames estuary, England (1980–1989)
A general pattern of stable fish populations with a slight trend of deterioration was found to emerge over the years, related to the number of species and quantities of common species. Expand
Environmental influences on the demersal fish assemblages in the Sepetiba Bay, Brazil
Most species decreased in abundance over the 3-yr period of study, but many species were rare, indicating high spatial and temporal patchiness. Expand
Longitudinal patterns of fish assemblages in a large tropical river in southeastern Brazil: evaluating environmental influences and some concepts in river ecology
This study aimed to evaluate environmental influences on fish distribution and to assess the extent to which concepts in river ecology accommodate levels of spatio-temporal heterogeneity of fishExpand
Fish Gills Alterations as Potential Biomarkers of Environmental Quality in a Eutrophized Tropical River in South‐Eastern Brazil
A histopathological alteration index based on the occurrence and severity of gills anomalies indicated that O. hepsetus (water column) and the bottom‐dweller H. auroguttatus had gills most susceptible to changes, making them more suitable for using as histological biomarkers of the environmental quality in entrophized tropical rivers. Expand
Distribution of fish assemblages in Lajes reservoir, Rio de Janeiro, Brazil.
Low abundance of reolific species Leporinus copelandii and Cyphocharax gilberti, and presence of introduced species such as Cichla monoculus and Tilapia rendallalli are indications of antropic effects in the fish community. Expand
Diel and seasonal changes in the distribution of fish on a southeast Brazil sandy beach
The winter/spring inshore/offshore movements at diel scale performed by the three most abundant species demonstrate that diel fluctuation acts more at a species-specific level than at a structural one; in summer there was no evidence of diel movements due to a heavy influx of G. rhombeus, which use the area throughout day and night, increasing overall abundance. Expand
Effects of the proximity from an industrial plant on fish assemblages in the rio Paraíba do Sul, southeastern Brazil
The use of biological indicators in this study proved to be a better tool to assess non-point sources pollution when compared to traditional physicochemical measurements. Expand
Heavy Metal in Tissues of Three Fish Species from Different Trophic Levels in a Tropical Brazilian River
Levels of metal contamination in gonads and muscles of three abundant fish species from different trophic levels indicate that human population should avoid to consume these fishes species from these segments of the Paraíba do Sul river. Expand