The Tocantins-Araguaia basin is the second largest in Brazil and the most extensive in
the drainage area totally placed in Brazilian territory. A time series of fishery production
of more than 30 years of Tucuruí Hydroeletric dam, between 1981 and 2016, in low
Tocantins, in ten landing harbor (five upstream and five downstream) was analyzed to
compare productivity and indicate suggestions for better planning and public policies
focused on the fishery resources in this basin. After analyzing over 16,000 landing data,
CPUE (kg / day) indicated that after an exponential growth upstream in the first 15
years of the dam, there was a decline trend in fish stocks up to 2016, mainly upstream.
The biodiversity of the ichthyofauna was higher downstream and Mapará H. marginatus
was the main species captured. It is concluded that the maintenance and accessibility by
society of a program to monitoring landings in the region, as well as studies of
population dynamics in order to better plan the fishing effort, is fundamental. It should
also be emphasized that environmental education should focus on the involvement of
fishing communities, alerting public managers about the importance of knowledge
about productivity and that the decline trend of upstream stocks should be considered in
the formulation or incentive of policies aimed at development of artisanal fisheries on
Tocantins-Araguaia basin.
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