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ORINOQUIA

On-line version ISSN 0121-3709

Abstract

YOSSA, Martha I. et al. Composition and dynamics of sediments in fishponds with white cachama and red tilapia. Orinoquia [online]. 2014, vol.18, suppl.1, pp.286-293. ISSN 0121-3709.

The objective of this study was to characterize and compare the sediment fish ponds commercial of cachama blanca and red tilapia during two productive cycles. The sediment was sampled at three points in the pond and for each species were selected three ponds at random. Organic matter, pH, phosphorus available, the macro- and micronutrients were compared between cycles per species. The sediment of ponds with cachama was not significant different between cycles, except in calcium (P<0.05), pH, potassium and copper (P<0.01). In the other hand, organic matter, available phosphorus (P<0.05) and copper (P<0.01) were the variables with significant different between cycles in the sediments of the ponds of tilapia. The mean value of organic matter (1.8%) was lower in tilapia ponds what could be associated with the action bioturbation of the species and contribute to the process of mineralization of organic matter.

Keywords : organic matter; macronutrients; micronutrients; Piaractus brachypomus; Oreochromis sp.

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