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AJBLS · Lens · Effects of Stocking Density on the Growth and Survival of Nile Tilapia (Oreochromis niloticus) Fry in Floating Cages in Togo

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Article · Volume 12, Issue 2 · pp. 310-316

Effects of Stocking Density on the Growth and Survival of Nile Tilapia (Oreochromis niloticus) Fry in Floating Cages in Togo

Seme Kpassi1, Lamboni Matéyendou2, Assai Kébalo Gnimwè1, Bidifayi Mousbaou1, Pitala Wéré1

  1. 1Department of Animal and Veterinary Sciences, Higher School of Agronomy, Research Laboratory on Agroressources and Environmental Health (LARASE), University of Lomé ESA/UL, Lomé, TOGO.
  2. 2Department of Animal Health and Fish Production, Higher Institute of Agricultural Professions, Laboratory of Applied Agronomic and Biological Sciences (LaSABA), University of Kara (ISMA/UK), Kara, TOGO.
  3. 3Department of Animal and Veterinary Sciences, Regional Center of Excellence on Avian Sciences (CERSA), University of Lomé, ESA/UL, Lomé, TOGO.

Abstract

Aim/Background: To determine the optimal stocking density of juvenile Nile tilapia (Oreochromis niloticus), allowing better growth and survival of fish in floating cages on the Zio River Dam at Quality Agro-Fish Farm in Togo.Materials and Methods: Three stocking densities (D1 = 350 individuals, D2 = 500 individuals, and D3 = 750 individuals) were considered in the 1 m3 floating cages. The experiment was carried out in triplicate for 45 days. The subjects were fed 4 times a day at a feeding rate of 8% of their biomass with the Raanan diet. Results and Conclusion: The average temperature was 27.11 ± 0.30°C, the average pH 7.18 ± 0.16, and average dissolved oxygen of 5.2 ± 0.95 mg/L. The initial average was 2 ± 0.09 g, and the final average weights were 27.33 ± 0.11 g (D1), 25.42 ± 0.21 g (D2), and 20.05 ± 0.14 g (D3). Mortality was inversely proportional to the experimentation time (p < 0.05). The highest average weight and survival rate were obtained at the lowest D1 density (27.33 g and 90.86%) (p < 0.05). The feed index was higher with the high density D3 (3.59), but the lowest and best feed index was obtained with the low density D1 (2.884) (p < 0.05). Thus, the optimal density obtained was 350 fry in a floating cage of 1 m3.

Keywords: Alevin; Floating Cages; Growth; Productive performance; Time of control

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