Utilização Do Índice De Estado Trófico Para Análise Do Grau De Trofia Do Parque Aquícola Sucupira (Lago De Palmas, To) Na Estação Seca

Abstract

Aquaculture is the fastest growing activity among food production sectors, however, its practice can cause environmental impacts, in case if a monitoring plan is not applied. The objective of the present study was to evaluate the trophic environment status using the Trophic State Index (TSI) in an aquaculture activity in a netcage system in the Lajeado reservoir, Palmas, Tocantins during the dry season. The monitoring was carried out from May/2017 to August/2017 and involved the water sampling for analysis of the following water quality parameters: total phosphorus and chlorophyll-a. At the same time, data were collected on temperature, turbidity, dissolved oxygen, conductivity, pH and total dissolved solids in loco. The Trophic State Index (TSI) results showed that the area under study during the months of May and August was predominantly under a supereutrophic condition. It indicates that the lake trophic state in the aquaculture surrounding area is strongly influenced by external anthropogenic activities. Thus, the effects of this activity in the medium and long term are difficult to predict, so it´s necessary to monitor and control the water quality.

Surface water quality in rural communities in the state of Goiás during the dry season and its relationship with land use and occupation

“…the risk of transmission of waterborne diseases may be lower(FUNASA, 2014).Similar studies, with sampling only during the dry season, have been carried out elsewhere(PEDROSO;COLESANTI, 2017;ROSANOVA et al, 2018;MUNIZ, 2019;POLHEIM;SCHEIN, 2019). Other research, carried out in the dry and rainy seasons, indicated superior quality in the dry season (SILVA; SÁ-OLIVEIRA, 2014; MEDEIROS; LIMA; GUIMARÃES, 2016; SILVA; CUNHA; LOPES, 2019).…”