Fattening of tilapia (Oreochromis niloticus) in floating cages at different densities arranged on the cutwater

Abstract

The objective of the experiment was to evaluate the fattening of tilapia (Oreochromis niloticus) in 1 m3 floating cages at different densities arranged in the cutwater. For 90 days, 120 specimens distributed in three different densities of fish with their repetitions in floating cages were evaluated: Density 1 (10 fish/m3), Density 2 (20 fish/m3), Density 3 (30 fish/m3). The variables Weight gain, Daily weight gain, Total Length, Standard Length, Height were measured. The data obtained were analyzed according to descriptive statistics, analysis of variance test (ANAVA) (p<0.05) with Tukey test at 5% probability of error for weight gain variable, through the SPSS statistical program. A statistically significant difference (p ? 0.05) was found in weight gain, where Density 1 showed an average of 405 grams, while densities 2 and 3, an average of 339 grams and 301 grams. Regarding Daily Weight Gain, Density 1, 2 and 3 presented averages of 4.5; 3.77 and 3.35 grams, respectively. Density 1 had an average total length of 30 cm, standard length: 25 cm and height: 11 cm. Density 2, an average total length of 29 cm, standard length: 24 cm and height: 10 cm. Density 3 presented an average total length: 27 cm, standard length: 22 cm and height: 10 cm. The use of a density of 10 fish/m3 is recommended for the fattening of tilapia (Oreochromis niloticus) in floating cages arranged in the cutwater.