Effects of bioflocs on growth performance, digestive enzyme activity and body composition of juvenile Litopenaeus vannamei in zero-water exchange tanks manipulating C/N ratio in feed

Xu, Wujie; Pan, Luqing

doi:10.1016/j.aquaculture.2012.05.022

Cited by 178 publications

(225 citation statements)

References 38 publications

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“…Higher survival and improved growth of the shrimp in all the biofloc treatments (Xu and Pan, 2012) can also, in turn, support the view that the shrimp grew in a healthy condition in bioflocbased tanks with carbohydrate addition.…”

Section: Immunological Parameters and Challenge Trialsupporting

confidence: 63%

“…Several researchers suggested that apart from maintaining good and stable water quality, the established biofloc in the culture system can improve growth performance and feed utilisation of different shrimp species viz., P. monodon (Arnold et al, 2009), P. semisulcatus (Megahed, 2010), Farfantepenaeus paulensis (Ballester et al, 2010), P. vannamei (Xu and Pan, 2012) and Marsupenaeus japonicus (Zhao et al, 2012).…”

Section: Immunological Parameters and Challenge Trialmentioning

confidence: 99%

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Biofloc based technology evaluation for nutrient dense culture system for nursery and grow-out farming of Pacific white shrimp Penaeus vannamei Boone, 1931

et al. 2017

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The concept of "biofloc technology" is changing the facet of intensive aquaculture with scope to attain high productivity in a sustainable manner. In biofloc, dense heterotrophic bacterial community is developed through C:N ratio manipulation, where the system becomes bacterial dominated rather than algae dominated and takes care of the wastes generated through in situ bioremediation. Protein is utilised in two ways; as feed for the shrimp and as microbial floc when the heterotrophic microbes convert the nitrogenous wastes into protein. It also promises a healthy rearing system, which is increasingly identified as one possible solution for disease problems especially those striking at early stages. The purpose of this study was to evaluate the effect of biofloc and periphyton technology (BPT) on the growth and immunomodulatory performance of Pacific white shrimp Penaeus vannamei during nursery and grow-out culture. The experimental BPT treatments with three tier substrate system with molasses as carbohydrate (CHO) source were compared with the conventional autotrophic system. The immunomodulation and cumulative percentage mortality upon challenge with pathogenic strain of Vibrio parahaemolyticus were assessed in the reared animals. We have successfully demonstrated the BPT based nursery and growout systems for P. vannamei with the advantage of providing significantly (p<0.05) better growth (27.6% improvement in average body weight, ABW) and feed utilisation (31% improvement in feed conversion ratio, FCR). A production level of 4-4.5 kg m -3 of water was achieved through this BPT system registering a significant improvement over the conventional system (p<0.05). The cumulative percentage mortality following pathogen challenge was significantly lower (p<0.05) in the biofloc grown shrimps compared to that of the control group, thus showing better resistance to pathogenic challenge. Furthermore, the biofloc reared shrimp did exhibit significant improvement in non-specific immune response in terms of serum phenoloxidase activity and total haemocyte counts possibly suggesting potential immunostimulatory role of the biofloc associated heterotrophic bacteria. This eco-based technology as revealed through our studies brings substantial improvement in productivity, minimising water requirement, recycling in situ nutrients and organic matter in turn improving farm biosecurity, augmentation of natural food, improvement of FCR and better health of the cultured shrimp.

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Section: Immunological Parameters and Challenge Trialsupporting

confidence: 63%

Section: Immunological Parameters and Challenge Trialmentioning

confidence: 99%

Biofloc based technology evaluation for nutrient dense culture system for nursery and grow-out farming of Pacific white shrimp Penaeus vannamei Boone, 1931

et al. 2017

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“…These exogenous enzymes can be produced by microbes present in the biofloc which increases the feed digestibility and help in proteins, carbohydrates, and other nutrients the breakdown into smaller units (Xu and Pan, 2012). Thus, the microbes in the biofloc act as an extracellular enzyme and a supplemental feed source that improve the digestive function and might have supported in enhancing the growth performance and feed utilization in the present study.…”

Section: Operational Cost Analysis Of Biofloc and Clear Water For Nurmentioning

confidence: 92%

Economic Viability of Biofloc Based System for the Nursery Rearing of Milkfish (Chanos chanos)

Sontakke¹,

Haridas²

2018

Int.J.Curr.Microbiol.App.Sci

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“…Bioflocs or its attached microorganisms could exert a positive effect on the digestive enzyme activity of shrimp (Xu and Pan 2012). Inclusion of bioflocs in the diet at BFT 75% results in improved growth performances and digestive enzyme activity of the common carp ( Najdegerami et al 2016); also biofloc as a dietary supplement at a 4% level in shrimp feed can enhance the growth and digestive enzyme activities in P. monodon .…”

Section: Bioflocs As Dietary Stimulantmentioning

confidence: 99%

“…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 …”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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Biofloc is a conglomeric aggregation of microbial communities such as phytoplankton, bacteria, and living and dead particulate organic matter. Biofloc technology involves manipulation of C/N ratio to convert toxic nitrogenous wastes into the useful microbial protein and helps in improving water quality under a zero water exchange system. It may act as a complete source of nutrition for aquatic organisms, along with some bioactive compounds that will enhance growth, survival, and defense mechanisms, and acts as a novel approach for health management in aquaculture by stimulating innate immune system of animals. Nutritionally, the floc biomass provides a complete source of nutrition as well as various bioactive compounds that are useful for improving the overall welfare indicators of aquatic organisms. Beneficial microbial bacterial floc and its derivative compounds such as organic acids, polyhydroxy acetate and polyhydroxy butyrate, could resist the growth of other pathogens, thus serves as a natural probiotic and immunostimulant. The technology is useful in maintaining optimum water quality parameters under a zero water exchange system, thus prevents eutrophication and effluent discharge into the surrounding environment. Moreover, the technology will be useful to ensure biosecurity, as there is no water exchange except sludge removal. The technology is economically viable, environmentally sustainable, and socially acceptable.

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Effects of bioflocs on growth performance, digestive enzyme activity and body composition of juvenile Litopenaeus vannamei in zero-water exchange tanks manipulating C/N ratio in feed

Cited by 178 publications

References 38 publications

Biofloc based technology evaluation for nutrient dense culture system for nursery and grow-out farming of Pacific white shrimp Penaeus vannamei Boone, 1931

Biofloc based technology evaluation for nutrient dense culture system for nursery and grow-out farming of Pacific white shrimp Penaeus vannamei Boone, 1931

Economic Viability of Biofloc Based System for the Nursery Rearing of Milkfish (Chanos chanos)

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

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