Histórico do comprimento total de tambaqui (Colossoma macropomum, CHARACIFORMES: CHARACIDAE, CUVIER, 1818) desembarcado no Mercado de Tefé, Amazonas, Brasil, com nove recomendações para o manejo pesqueiro da espécie

Abstract

This study evaluates the total length of tambaqui (Colossoma macropomum) captured in the middle Solimões river and traded during seven years (1993, 1997 and 2000 to 2005) in the Tefé market, Amazon, Brazil. The Mamirauá Institute of Sustainable Development obtained measurements of the total lengths from 42207 individuals. The length average was 45.23 ± 6.29 cm (minimum of 13 cm and maximum of 105.5 cm) and the mode was 45 cm. From the total tambaquis, 92.86% were smaller than 55 cm and 7.14% measured 58.24 ± 5.41 cm on average. Medium and standard deviation of the lengths recorded in all years showed sizes below the established by the environmental federal agency. The Kruskal Wallis test showed that there is no significant difference between the abundances and medium sizes of the captures during all months of the year. The historical data of the tambaqui fisheries for the middle Solimões region indicate that individuals of this species have been constantly captured at sizes below the minimum length of reproduction. Nine recommendations for tambaquis fisheries management in the region related to more efficient mechanisms of inspection, auto-ecology studies of the species, environmental protection, reduction of fishery pressure, diffusion and educational campaigns that aim to correct exploitation of this resource are presented in this manuscript.