Resumo

LOPEZ-MACIAS, Jorge N  e  SALAS-BENAVIDES, Julbrinner. Physicochemical and biological comparison between effluents from rainbow trout production and the limnological condition of Lake Guamuez, department of Nariño. Orinoquia [online]. 2019, vol.23, n.2, pp.87-96. ISSN 0121-3709.  https://doi.org/10.22579/20112629.572.

The study of lakes as sources of natural resources of various kinds constitutes a concern of entities that regulate their management in conservation and sustainable production in interaction of biotic and abiotic factors that affect the ecosystem. Consequently, this project can generate permanent scientific information for a management plan for the Guamuez Lake basin in compliance with international and national commitments in the conservation of the La Cocha wetland. The present investigation by means of 12 periodic sampling in five stations: 1. Intiyaco (E1), superficial zone (A) and deep zone (B); the following stations were located from E1; station 2. 50 meters (C); 3. 100 meters (D); 4. 150 meters (E) and 5. Center of the lake (F), analysis of variance, normality test and correlation, sought to evaluate the effect of aquaculture farms in floating cages on the physicochemical and biological variables of Lake Guamuez. The limnological condition showed significant differences between surface and deep waters (respectively NH-N and DB, with P-PO, DQ, Colift and Coliff); the pH and NTU in A and B, differ from the other sites evaluated. There is a higher concentration (P<0,05) of OD and %O in station 3. In 2008, stations 1 and 5 show a higher average in the estimation of OD, pH, Dur and DB and for 2018, the parameters increased limiting towards the center of the lake (NH-N, P-PO, NTU and Colift); Thus, 70% of the evaluation parameters in the Intiyaco project increased their average estimate between 2008 and 2018 (DB, OD and %O). The concentration of E. coli has a higher mean (P<0,05) in B and differs from A, C, D, E and F; while phosphates and Colift differ (P<0,05) between A and stations B, C, D, E and F.

Palavras-chave : primary productivity; coliforms; water quality; environmental deterioration.

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