Effect of biofloc technology (BFT) on the early postlarval stage of pink shrimp Farfantepenaeus paulensis: growth performance, floc composition and salinity stress tolerance

Abstract

Biofloc rearing media provides a potential food source for shrimp reared in limited or zero water exchange systems. This culture system is environmentally friendly as it is based on limited water use and minimal effluent is released into the surrounding environment. In this study, we evaluated the survival, growth performance and salinity stress tolerance of pink shrimp Farfantepenaeus paulensis postlarvae reared from PL 10 to PL 25 in a biofloc technology limited water exchange system. PL (mean ± SD weight and length of 14 ± 10 mg and 8.10 ± 0.7 mm, respectively) were reared in nine 40-L plastic tanks with a stocking density of 10PL/L. Three culture treatments were applied (1) culture in the presence of bioflocs and commercial feed supply (FLOC ? CF); (2) culture in the presence of biofloc without feed supply (FLOC) and (3) culture in clear water with feed supply (control). Final biomass and survival were significantly higher in FLOC ? CF treatment than the control (P \ 0.05), but did not differ from FLOC. PL reared in the FLOC ? CF treatment achieved a significantly higher final weight, weight gain and length in comparison with the other two treatments (P \ 0.05). No significant difference (P [ 0.05) between treatments was found for salinity tolerance over 24 and 48 h durations. The proximate analysis of floc shown high levels of crude protein (30.4%), but low levels of crude lipids (0.5%). The continuous availability of bioflocs had a significant effect on growth and survival of F. paulensis postlarvae cultured in BFT nursery systems.

Biofloc Technology (BFT): A Review for Aquaculture Application and Animal Food Industry

“…In [46] was observed that presence of bioflocs resulted in increases of 50% in weight and almost 80% in final biomass in F. paulensis early postlarval stage when compared to conventional clear-water system. This trend was observed even when postlarvae were not fed with a commercial feed (biofloc without commercial feed).…”

“…vannamei [44,48], P. monodon [51], F. paulensis [15,46], F. brasiliensis [37,52] and F. setiferus [34]. The primary advantage observed is related to a better nutrition by continuous consumption of biofloc, which might positively influence grow-out performance a posteriori [53], but was not always the case [54].…”

“…Collected in tanks/ponds [46,62] or produced in bioreactors [17,39,67] biofloc (Fig 8) is a raw material to produce "biofloc meal". In bioreactors, biofloc production can clean up effluent waters from aquaculture facilities, converting dissolved nutrients into single-cell protein [78].…”

“…This sustainable approach of protein source is getting more attention in the aquaculture industry. The microbial particles can provide important nutrients such as protein [33,46], lipids [10,37], aminoacids [80] and fatty acids [33,67,81].…”

Biofloc technology: an emerging avenue in aquatic animal healthcare and nutrition

“…Biofloc technology has gained attentions recently as a sustainable and eco-friendly method of aquaculture which controls water quality, along with the production of value added microbial proteinaceous feed for the aquatic organisms. The use of BFT systems in the marine shrimp aquaculture has been extensively studied (Emerenciano et al 2011(Emerenciano et al , 2012b(Emerenciano et al , 2013bRay et al 2011;Xu and Pan 2012;da Silva et al 2013;Schveitzer et al 2013;de Souza et al 2014;Kumar et al 2014). The technology is cost-effective and environment-friendly and supports sustainable aquaculture (Naylor et al 2000;Avnimelech and Kochba 2009 …”