Comparative study of larvae production by the Nile tilapia ( <i>Oreochromis niloticus</i> , Linné, 1758) Bouaké strain between earthen ponds and hapas

The aim of this study was to contribute the development tilapia aquaculture in Côte d’Ivoire by increasing productivity Oreochromis niloticus fry fish hatcheries. Thus, production larvae compared between two breeding systems, earthen ponds and hapas ponds. Over 98 days, 900 broodstock were allowed reproduce 500 m2 others 20 50 m2, each installed 1200 m2. sex ratio one male for females at a density 0.9 breeders/m2 450 breeders per pond 45 hapa. After both harvested counted every 14 days. survival rate growth broodstock, as well reproductive performance females, evaluated. There no significant difference rates systems (98.1 ± 0.4% 97.4 0.5% hapas). Broodstock, however, showed significantly higher than hapas. quantity produced that bred (p < 0.05). Hence, best recorded stocked (absolute productivity: 93.1 female, relative 0.3 g system 3.9 0.2 larvae·m−2·day−1).