Growth performance and fatty acid profile of Nile tilapia Oreochromis niloticus (Linnaeus, 1758) fed with different phytoplankton

Abstract

The effect of different phytoplankton species on growth, survival and fatty acids composition of Nile tilapia (Oreochromis niloticus) was evaluated for 24 weeks. Treatment-1 was fed with commercial feed as Control, treatment-2 was fed with Spirulina platensis, treatment-3 was fed with Chlorella vulgaris and treatment-4 was fed with mixed phytoplankton (Chlorella vulgaris, Spirulina platensis, Azolla pinnata and Pistia stratiotes). The condition factor of fish found in treatment-3 with Chlorella vulgaris (1.73 ± 0.02) was significantly higher than that of treatment-1 as control (1.56 ± 0.02) at 24 weeks culture period. The specific growth rate of treatment-4 with mixed phytoplankton diet (2.00 ± 0.10) was significantly higher than treatment-3 with Chlorella vulgaris (1.13 ± 0.05) after 24 weeks of rearing. There was no significant difference among the four treatments in case of average daily gain, feed conversion ration and survival rate. The use of different phytoplankton such as Spirulina platensis, Chlorella vulgaris and Azolla pinnata influence the fatty acid profiles of Nile tilapia. Findings also showed that the amount of eicosapentaenoic acid (EPA) in treatment-3 fed with Chlorella vulgaris (1.83 ± 0.22) was highly significant than the other treatments. The highest amount of docosahexaenoic acid (DHA) was found in treatment-1 fed with commercial feed (2.70 ± 0.53%) and lowest in treatment-2 with Spirulina platensis (0.06 ± 0.02%). Among 19 unsaturated fatty acid, the highest concentration of PUFAs were recorded in treatment-3 (42.55 ± 3.46%) fed with Chlorella vulgaris. The findings of this study suggest that raising Nile tilapia with Chlorella vulgaris and Spirulina platensis in ponds may improve the growth and fatty acid profile of the fish.
 Dhaka Univ. J. Biol. Sci. 26(1): 13-27, 2017 (January)

Specific Growth Rate (SGR) in Different Stages of Tilapia (Oreochromis niloticus) Production Cycle in Cemented Tank Based Semi-Intensive Aquaculture System

“…The mean value of SGR in T 1 and T 2 were 6.27 ± 3.27 and 6.26 ±3.83, respectively which were higher than the result of Hossain et al 2017.…”

Effect of aeration systems under desert conditions on growth, survival and yield of Nile tilapia Oreochromis niloticus

“…Mixing by aeration can minimize organic matter accumulation that may increase BOD, reduce the density of algal blooms that can lead to oxygen depletion and fish health issues, and shift the composition of algae blooms that may lead to flavor issues in finfish (Hargreaves, 2003). Hossain et al (2017) indicated that the highest value of condition factor (1.73 ± 0.02) was recorded in tilapia fed on Chlorella vulgaris and the lowest value (1.56 ± 0.02) of fish fed with commercial feed (control). In the current investigation the estimated condition factor for O. niloticus was high in aerated ponds which increase conversion ratio of this fish.…”

Toward sustainable food systems: can spirulina (Arthrospira platensis) become a sustainable source of protein to enhance the nutritional benefits of cultured Nile tilapia (Oreochromis niloticus)?

“…These outcomes confirm similar findings across the literature on spirulina trials as feed in the aquaculture sector, mostly in Asia. This includes experiments on growth performance, survival rate, fatty acid profiles, and fecundity of Nile tilapia (O. niloticus) conducted in Bangladesh (Hossain, 2017). In Japan, it has been found that tilapia fed solely raw spirulina has a high flesh quality (Lu et al, 2003).…”