Effect of Final Batch Size Heterogeneity of Clarias gariepinus reared in Concrete Tanks on Sales

Abstract

An evaluation of sizes at harvest following commercial production of Clarias gariepinus in 12 m³ capacity indoor concrete tanks was conducted. Initial mean weight, standard length and total length of the fish averaged 8.21±0.65 g, 9.51±0.20 cm and 10.82±0.27 cm (mean±SEM) respectively. The culture period was fifteen weeks with the fish attaining various sizes ranging from 151.54 g to 1 kg. Results indicated that the three size classes (large, medium and small) generated mid culture exhibited varying survival rates and wide coefficient of variation thereby impacting sales.