Abstract
This study was to find out the biological effects of different feed dose and their relationship to the growth of tilapia. Fingerlings of Oreochromis niloticus, with an average initial weight range of 4.42 - 4.44 g were randomly distributed into three treatments and replicated 3 times using concrete fish container.The treatments were three feed doses namely: 5% (A); 8% (B); adlibitum (C) of 32% crude protein floating pellet feed, in crumble-shaped. The effect of different dose on growth and its correlation were determined. A one-way analysis of variance (ANOVA) was used to determine of initial, final and absolut weight, Average body weight (ABW) and Average daily growth (ADG). Feed conversion ratio, survival rate and biomass were also counted. Polynomial analysis was further used to prove whether the amount of feed provided is effective for fish growth. Temperature, pH, disolleved oxygen and ammnonia were test. The results noted that biological performance parameters were not signifanctly different (p ≥ 0.05) between treatments. Polynomial results showed for its growth tilapia fish using 98-99% of the feed given. The results of water quality parameters indicated an optimal range value to growth of nile tilapia.
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