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The species Trachelyopterus coriaceus , popularly known as Moors Flue, is among the fish species residing in the Environmental Protection Area (EPA) of the river Curiau Amapa, and presents itself to the system markedly river-floodplain. The study aimed to assess the population structure of T. coriaceus in APA Curiau the river, through the length-weight relationships, sex ratio and population structure on growth. Sampling was conducted between April 2007 and February 2008, taking into account the periods of high and low rainfall (rainy and drought). We collected a total of 45 individuals of T. coriaceus . Males were larger than females, but females were heavier than males. The species showed positive allometric growth. The ratio was 1.14:1 (F / M). The length structure seasonal and bimonthly showed that there was a greater number of individuals of both sexes between classes 70 - 80 mm. Difference was observed in the total length of individuals only in relation to the marking periods. Factors such as temperature, time of year, feeding, stage of maturity, sex and periods of the year, may be the cause of differences in aspects of the population structure of T. coriaceus in EPA Curiau River. Keywords: Amazon; Increase; Allometric; Sex ratio; Trachelyopterus coriaceus.

biota amazônia

Aspectos da Estrutura Populacional do Trachelyopterus coriaceus, Amarra Tarrafa, Valenciennes, 1840 (Siluriformes, Auchenipteridae) na APA do Rio Curiaú, Estado do Amapá, Brasil