LIMNOLOGICAL PARAMETERS IN FISHING-PAYING NURSERIES IN ARCHI-PELAGO OF MARAJÓ, AMAZON, BRAZIL

Fabricio Nilo Lima da SILVA, Anderson Paixão HUNGRIA, Rosangela Aires MACHADO, Julia Siqueira MOREAL, Luã Caldas de OLIVEIRA, Lenilton Alex de Araujo OLIVEIRA, Paulo Marcelo de Oliveira LINS, Manoel Luciano Aviz de QUADROS

Resumo


The aim of this work was to evaluate the water quality in ponds used in the creation of tambaqui (Colossoma macropomum) in fishing activities in the archipelago of Marajó, Pará, Brazil. The analysis of the limnological parameters of the ponds was carried out monthly, close to the entrance and exit of water from the ponds in the morning (8 am) and afternoon (5 pm), between the months of June to September 2018. The results were submitted to analysis of variance (ANOVA) and, in case of significant difference (p<0.05), the Tukey test was performed to compare the averages with 5% probability. The electrical conductivity (mS.cm-1), turbidity (mg.L-1), total dissolved solids (mg.L-1), and transparency (cm) var-ia-bles showed significant differences over the months. On the other hand, there was no sig-nificant difference for the variables temperature, dissolved oxygen, hydrogen potential, ammonia, nitrite, nitrate and phosphorus. All variables agreed with the National En vi-ronment Council (CONAMA nº 357/2005). In conclusion, the limnological parameters showed low alteration in the nurseries and they were able to create tambaqui for the pur-pose of fishing..

Keywords: Aquaculture. fish farming. Colossoma macropomum. water quality.


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Referências


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