Slaughter yield and chemical composition of Siberian sturgeon reared in a recirculating aquaculture system (RAS)

Abstract Sturgeon fish species are food fish of commercial significance in many countries. Sturgeon farming in Serbia is a relatively new branch of aquaculture, and sturgeon farming has been developing in the last several years. The objective of this study was to examine morpho-physiological and slaughter characteristics and proximate composition of one-year-old sturgeons produced in a recirculating aquaculture system (RAS). Sturgeons were cultured in a RAS system nearby Novi Sad and were fed with commercial feed. Moisture content in fillets ranged from 75.63 to 77.91%, protein content from 18.06 to 18.89% and lipid content from 2.37 to 4.38%. The slaughter performance results are in agreement with those reported by various authors for different strains of sturgeons. Sturgeon species have potential to become an attractive fish in our aquaculture in terms of overall proximate composition and slaughter performance.

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Growth Performances and Proximate Composition of Mystus Cavasius (Hamilton, 1822) Cultured in Recirculating Aquaculture System Under Different Stocking Densities

Dhaka University Journal of Biological Sciences ◽

10.3329/dujbs.v29i2.48733 ◽

2020 ◽

Vol 29 (2) ◽

pp. 137-145

Author(s):

Md Mizanur Rahman ◽

Gouri Mondal ◽

MD Marufujjaman Mithu ◽

Md Golam Rabbane ◽

Md Ghulam Mustafa

Keyword(s):

Survival Rate ◽

Proximate Composition ◽

Stocking Density ◽

Culture Period ◽

Recirculating Aquaculture System ◽

High Density Culture ◽

Crude Lipid ◽

Recirculating Aquaculture ◽

Aquaculture System ◽

Growth Performances

Experiment was conducted to evaluate the high density culture of Mystus cavasius and its effects on growth performances, survival rate and proximate composition of the fish in recirculating aquaculture system. Fishes were cultured at 571, 714, 857 and 1000 fries/m3 as the initial stocking density. No significant differences (p > 0.05) were found in specific growth rate, average daily gain, food conversation ratio, protein efficiency ratio, condition factor (k) and survival rate (%) of fish under the culture period of 120 days among the different stocking densities. The average survival rate was ≥ 99% among the treatments at the end of the culture period. The moisture contents were between 77.10 and 77.75%, ash content was 2.58 and 2.61%, crude protein was 15.86 and 16.07%, crude lipid was 5.45 and 5.68% with no significant differences (p > 0.05) among the treatments. There were no significant variations in DO, TAN, NO3-N, NO2-N and pH among the treatments during culture. This study showed that stocking density of at least 1000 fries/m3 was the best option as the total gain was highest compared to other lower densities under similar facilities. Dhaka Univ. J. Biol. Sci. 29(2): 137-145, 2020 (July)

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Variation of growth and proximate composition in Portunus pelagicus juveniles fed with selected feeds in recirculating aquaculture system (RAS)

Journal of Environmental Biology ◽

10.22438/jeb/39/5(si)/12 ◽

2018 ◽

Vol 39 (5(SI)) ◽

pp. 871-876 ◽

Cited By ~ 1

Author(s):

S.M.S. kohinoor ◽

◽

A. Arshad ◽

S.M.N. Amin ◽

Mohd. S. Kamarudin ◽

...

Keyword(s):

Proximate Composition ◽

Recirculating Aquaculture System ◽

Portunus Pelagicus ◽

Recirculating Aquaculture ◽

Aquaculture System

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Variation of Water Quality in Fish Farm Using Recirculating Aquaculture System for Fancy Carp

Journal of the Korean Society for Environmental Technology ◽

10.26511/jkset.19.1.5 ◽

2018 ◽

Vol 19 (1) ◽

pp. 37-45

Author(s):

Woo Jin Lee ◽

Seon Woo Baek ◽

Ha Na Seo ◽

Byeong Wook Kong ◽

Deog Gwan Ra ◽

...

Keyword(s):

Water Quality ◽

Fish Farm ◽

Recirculating Aquaculture System ◽

Recirculating Aquaculture ◽

Aquaculture System

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Analysis of microbial community structure in an integrated pond recirculating aquaculture system

Journal of Fishery Sciences of China ◽

10.3724/sp.j.1118.2011.00407 ◽

2013 ◽

Vol 18 (2) ◽

pp. 407-415

Author(s):

Yandan YAO ◽

Gu LI ◽

Ling TAO ◽

Xiaoli LI ◽

Shiyang ZHANG ◽

...

Keyword(s):

Community Structure ◽

Microbial Community ◽

Microbial Community Structure ◽

Recirculating Aquaculture System ◽

Recirculating Aquaculture ◽

Aquaculture System

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Denitrification Control in a Recirculating Aquaculture System—A Simulation Study

Processes ◽

10.3390/pr8101306 ◽

2020 ◽

Vol 8 (10) ◽

pp. 1306

Author(s):

Pedro Almeida ◽

Laurent Dewasme ◽

Alain Vande Wouwer

Keyword(s):

Carbon Source ◽

Carbon Sources ◽

Aquatic Organisms ◽

Operating Conditions ◽

Toxic Substances ◽

Recirculating Aquaculture System ◽

Treatment Technology ◽

Tuning Method ◽

Recirculating Aquaculture ◽

Aquaculture System

The recirculating aquaculture system (RAS) is a land-based water treatment technology, which allows for farming aquatic organisms, such as fish, by reusing the water in the production (often less than 5%). This technology is based on the use of filters, either mechanical or biological, and can, in principle, be used for any species grown in aquaculture. Due to the low recirculation rate, ammonia accumulates in the system and must be converted into nitrate using nitrification reactors. Although less toxic for fish, nitrate can also be further reduced into nitrogen gas by the use of denitrification biofilters which may create several issues, such as incomplete denitrification, resulting in toxic substances, such as nitrite and nitric oxide, or a waste of carbon source in excess. Control of the added quantity of carbon source in the denitrification biofilter is then mandatory to keep nitrate/nitrite concentrations under toxic levels for fish and in accordance with local effluent regulations, and to reduce costs related to wasted organic carbon sources. This study therefore investigates the application of different control methodologies to a denitrification reactor in a RAS. To this end, a numerical simulator is built to predict the RAS behavior and to allow for the comparison of different control approaches, in the presence of changes in the operating conditions, such as fish density and biofilter removal efficiency. First, a classical proportional-integral-derivative (PID) controller was designed, based on an SIMC tuning method depending on the amount of ammonia excreted by fish. Then, linearizing and cascade controllers were considered as possible alternatives.

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