Caractérisation et modélisation des paramètres physico-chimiques pour une gestion durable de l’aquaculturesur la côte est et hautes terres Malagasy

Abstract

This study conducted in Antsirabe examined the effect of two feed treatments, AC0 and AC1, on the growth performance of tilapia in aquaculture conditions. Overall, the results show that both diets produced very similar outcomes. The average final weight (FAW) was almost identical between treatments, with a slight advantage for AC0 (51.62 g) compared to AC1 (51.36 g). Weight gain (WG) and daily weight gain (DWG) followed the same trend, reaching 42.50 g and 0.66 g/day under AC0, against 41.80 g and 0.64 g/day with AC1, although these differences were not statistically significant. The specific growth rate (SGR) remained close as well, with 3.07 %/day for AC0 and 2.95 %/day for AC1. Feed conversion (CI) was nearly identical between treatments (1.15 vs. 1.16), and survival reached 100 % in both groups. The condition factor (K) was also the same (2.44), indicating healthy and well-proportioned fish regardless of treatment. Taken together, the findings suggest that the two diets support comparable growth performance, with only minor, non-significant tendencies favoring AC0. These results indicate that AC1 may serve as an alternative feed option without compromising growth or survival.