Impacto da manutenção de reprodutores de macrobrachium rosenbergii na qualidade da água

Henares, Matheus Nicolino Peixoto [UNESP]; Camargo, Antonio Fernando Monteiro [UNESP]; Biudes, José Francisco Vicente [UNESP]; Valenti, Wagner Cotroni [UNESP]

Impacto da manutenção de reprodutores de macrobrachium rosenbergii na qualidade da água

Data

2011-08-22

Autores

Henares, Matheus Nicolino Peixoto

Camargo, Antonio Fernando Monteiro

Biudes, José Francisco Vicente

Valenti, Wagner Cotroni

Tipo

Artigo

Resumo

Our objective was to evaluate the impacts caused on pond water quality by maintenance of Macrobrachium rosenbergii broodstock. During eight weeks we determined pH, dissolved oxygen (DO), conductivity, turbidity, particulate suspended material (PSM), nitrogen (N) and phosphorus (P), all in inlet and effluent water. All variables presented higher values in the effluent, except OD. N-ammoniacal concentration (0.013 mg L -1) was 2.7 times higher in the effluent pond; NO 2-N (0.019 mg L -1, 2.3; NO 3-N (0.139 μg L -1), 1.8; PO 4-P (0.065 mg L -1), 7.2; and DP (0,104 mg L -1), 4.9 times higher. For TKN (0.67 mg L -1) and TP (0.235 mg L -1) the values in the pond effluent represent an increase of 0.27 mg L -1 and 0.175 mg L -1, respectively. The maintenance of M. rosenbergii broodstock increase the nutrient concentrations, mainly TP, prevent effluent pond released into receiving water bodies on 1, 2 and 3 classes of the CONAMA N° 357 Resolution.