Efecto de la resuspensión de sedimentos en la calidad de agua en estanques de cultivo de Litopenaeus Vannamei.

Abstract

The present study was carried out in an aquaculture farm belonging to the LANGOCAMPA S.A. group, located on the road to Balosa km 16, in the city of Machala, province of El Oro, and its main objective was to measure the effect of sediment resuspension on the water quality in a Litopenaeus vannamei culture pond, for this, two ponds were required, in which one was going to be subjected to the resuspension process (E1) and the other one not (E3). In the pond (E1) a 4-meter-long chain was used and was dragged along the edges, middle part, and gates. Dissolved oxygen (DO) before and after the resuspension process was recorded. Water samples were also taken to evaluate nitrogen and phosphorus, which were processed by the Gisis Aquatic Services Testing Laboratory, of the company Skretting S.A. Sediment samples were taken before and after the culture cycle in both ponds, and were processed by the laboratory Nemalab S.A. As results, an increase of 200-300% was observed in the DO concentration in pond E1 compared to pond E3, which was attributed to resuspension, since it allows greater contact of the sediment with the water column, favoring the mineralization of organic matter (OM) and the release of nutrients, thus increasing phytoplankton and therefore DO levels.