Responses of trophic fish guilds upstream and downstream of the Balbina dam, Central Amazon, Northern Brazil
Gilvan Costa,
Bianca Weiss,
Maria Teresa Fernandez Piedade
Abstract:This study compared the diversity, richness, abundance, and biomass of fish collected in three environments in the Central Amazon: (1) the reservoir of the Balbina hydroelectric dam; (2) the Uatumã River downstream of the dam; and (3) the Abacate River. Through the analysis of food resources, we determined the fish trophic guilds for each environment. We hypothesized that the undisturbed environment of the Abacate River would present the highest values of diversity, richness, abundance, and biomass, followed b… Show more
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