Aquaculture Science, vol: 66,1 (2018)
Effectiveness of Sargassum meal as feed additive on growth performance of Nile tilapia, Oreochromis niloticus
Pratiwy F.M., Pratiwy F.M., Kohbara J., Susanto A.B.
Abstract
The present work was carried out to assess the effects of Sargassum meal (SM) on the growth performance of Nile tilapia Oreochromis niloticus. Three different 32ô iso-proteinous diets were prepared by replacing rice bran with inclusion of SM of 0ô (T1), 4ô (T2), and 8ô (T3) and fed to replicate trials of individual males, individual females, and mixed sex tilapia. The results showed that the highest values of feed efficiency (FE) and specific growth rate (SGR) in each rearing condition were observed in T3. There were significant differences (P < 0.05) of FE and SGR for the individual male and mixed sex experiment trials between T1 and T3, however, there were no significant differences for individual female trials. The results of the length-weight relationship showed that there were significant differences (P < 0.05) between individual males and individual females according to the condition factor which showed a positive allometric (b > 3) exponential growth in individual males, while the individual female trials showed a negative allometric (b < 3) growth pattern at each level of SM inclusion. It is concluded that 8ô SM produced the best results for growth performance in Nile tilapia. © 2018 Japanese Society for Aquaculture Research, Nishimura Toushadou Ltd.. All rights reserved.
Keyword: Feed additive; Growth; Nile tilapia; Sargassum