Abundância da produção pesqueira por área de pesca do lago da Hidrelétrica de Tucuruí

Abstract

The Tucuruí Hydroelectric Dam (UHE Tucuruí) is located on the lower Tocantins River, and fishing is an important life alternative for its population and those involved. The study aims to provide information on fishing abundance by fishing area in the Tucuruí UHE lake. The control of landings of fish was carried out by Ideflor (Pará State Forestry and Biodiversity Institute) over a two-year period (February to October 2017) to (January to October 2018), via specific forms that are completed. during landings at the places with the highest flow of activity, in the ports of Breu Branco, Tucuruí, Novo Repartimento, Jacundá, Goianésia and Itupiranga. The Tucuruí lake was divided by zones of environmental impact of the Tocantins river waterway and the Pedral do Lourenço landslide for the fisheries with geographical position, and the fisheries that cannot be obtained were divided by production scale. For the standardization of the average CPUE's, the effect of different fishing powers by the standard vessel (inboard motor boat) and net and hook fishing tackle was reduced. The total production recorded in 2017 was 926.35 tons, and in 2018 was 1975.34 tons, which corresponds to a total production of 2901.69 tons. The most used equipment by fishermen in the Tucuruí HPP are the gillnet, tarrafa, harpoon and hook (hand line, reed, longline), the main one being the gillnet with a production of 2500 tons. Throughout the dry and rainy period in 2017 and 2018 production varied, however in the dry period of 2017, production was higher compared to the rainy period of the same year. In the analysis it was found that the target species with higher production is the mapará with 1209.86 tons in 2017 and 2018, and the second largest white hake with 506.79 tons landed in ports. The CPUE, using the gill net, in 2017 and 2018, obtained greater abundance in October, using the hook in 2017, the highest abundance occurred in February, with approximately 1500. tons and in 2018 the abundance occurred in February with over 120 tons. Thus, it was identified that Jacundazão is the most abundant fishery and that the gillnet is the most used catch in the catch.