Comparison of fertilization prototype on biofloc development and its characteristics in GIFT Tilapia Culture

Abstract

A study was conducted to evaluate the effect of different fertilizers in GIFT Tilapia culture using biofloc technology. Animals (5±0.23g) were stocked at a density of 30m-3 in 500 litres FRP tanks and spentwash was used as a carbon source to maintain a C:N ratio of 10:1 for 42 days. The experimental group includes fertilization using ammonia sulphate alone (T1) and fertilization using different inorganic fertilizers (T2). No significant differences in FCR, specific growth rate, weight gain and survival of animals were found between the treatments. Proximate composition and fatty acid profile of floc were comparatively rich in T2. Increased solid concentrations with higher Floc volume index and floc sizes were recorded in T2. The rapid floc development along with multiplication of heterotrophic bacteria and decreased vibrio population was observed in T2. The present study confirmed the influence of fertilizers on the physical and nutritional quality of biofloc in GIFT tilapia culture.

​Effect of Distillery Spent Wash as Carbon Source in Biofloc System on Nutrient Profile of GIFT Tilapia

“…After anaerobic and aerobic treatment of DSW would not harm Effect of Distillery Spent Wash as Carbon Source in Biofloc System on Nutrient Profile of GIFT Tilapia the environment (Mohana et al, 2009). Hence, treated DSW act as a good carbon source (26%) in biofloc production (Antonyraj, 2016;Liu et al, 2017;Yuvarajan et al, 2018;Menaga et al, 2020).…”

Characterisation of Pigment Producing Bacteria Isolated from Bio Floc Ponds and Its Colour Enhancement Effect in Xiphophorus helleri

“…The biofloc was developed in the fresh water pond for GIFT Tilapia culture for a period of four months and maintained. The use of inorganic fertilizers for the faster development of floc with the predominant heterotrophic bacterial community was followed as suggested by Menaga et al, 2020. To maintain the C: N ratio at 10:1, distillery spent wash obtained from M/s. Rajshree BioSolutions, Coimbatore has been used as a carbon source.…”

​​Nursery Rearing of Penaeus vannamei in Biofloc Systems with Different Salinities and Organic Carbon Sources

“…But the traditional water exchange systems in nursery rearing often getting failure due to accumulation of nitrogenous wastes, hence, nursery farming of P. vannamei showed positive results especially with bioflocs systems (BFS) (Khanjani et al, 2016). The nitrogenous wastes from the nursery systems would be converted into useful heterotrophic bacterial biomass, by continuous addition of carbon sources to alter the C:N of the systems in such a way to aid the bioflocs formation under continuous aeration (Avnimelech, 1999;Menaga et al, 2020;Yuvarajan et al, 2021). The use of bioflocs technology would improve the survival, growth and final biomass of cultured animals (Khanjani et al, 2016).…”