scholarly journals Economic values of growth and feed efficiency for fish farming in recirculating aquaculture system with density and nitrogen output limitations: a case study with African catfish (Clarias gariepinus)1

2014 ◽  
Vol 92 (12) ◽  
pp. 5394-5405 ◽  
Author(s):  
M. Besson ◽  
H. Komen ◽  
J. Aubin ◽  
I. J. M. de Boer ◽  
M. Poelman ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Clarias Gariepinus ◽  
Fish Farming ◽  
African Catfish ◽  
Recirculating Aquaculture System ◽  
Economic Values ◽  
Recirculating Aquaculture ◽  
Aquaculture System

scholarly journals PRACTICE OF ARTIFICIAL REPRODUCTION OF STERLAD (ACIPENSER RUTHENUS LINNAEUS) IN RECIRCULATING AQUACULTURE SYSTEM (IN MANGISTAU REGION)

2020 ◽  
Vol 2020 (3) ◽  
pp. 111-124
Author(s):  
Yefim Fedorovich Bulavin ◽  
Guldana Maratkizi Maratova ◽  
Saule Zhangirovna Asylbekova ◽  
Kuanysh Baibulatovich Isbekov ◽  
Saya Kashkinbayevna Koyshibaeva ◽  
...  
Keyword(s):  
Fish Farming ◽  
Artificial Reproduction ◽  
Recirculating Aquaculture System ◽  
Hormonal Stimulation ◽  
Commercial Fish ◽  
Acipenser Ruthenus ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Sturgeon Species ◽  
Sterlet Acipenser Ruthenus

The paper presents the results of artificial reproduction of sterlet (Acipenser ruthenus Linnaeus) carried out at the Scientific Production Center KazakhOsseter, LLP (the Mangistau region) in conditions of a recirculating aquatic system (RAS). The conditions for carrying out the main reproduction measures are described: wintering, qualifying, hormonal stimulation, obtaining reproductive products and rearing larvae. As a result, the sterlet spawning campaign was carried out in conditions of RAS in the Mangistau region, the native grown viable sterlet larvae being obtained. In the course of the work carried out in conditions of RAS in the Mangistau region there have been developed the scientific foundations and technologies for the formation and using production stocks of sturgeon, which are involved in the process of artificial reproduction. The results of the work performed could help to effectively organize the production at the commercial fish farming enterprises in the Mangistau region. The entrepreneurs of the region will have the opportunity to get acquainted with the technology of fish growing in conditions of RAS and to apply the technology for obtaining and reproducing sturgeon species in the ir local hatcheries in the future.

Case study on developing financially viable Recirculation Aquaculture Systems (RAS) for tilapia production in Egypt: technology transfer from the Netherlands.

2020 ◽  
Author(s):  
Ismail A Radwan
Keyword(s):  
Technology Transfer ◽  
The Netherlands ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Benefit Analysis ◽  
Recirculating Aquaculture System ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Exchange Programme

Abstract This case study describes the first trial operation of a recirculating aquaculture system (RAS) for tilapia production in Egypt. The fish farmer in this case study became involved with an exchange programme with the Netherlands, resulting in wholesale changes in his commercial farm which are described in this case study. Also presented is a cost benefit analysis of the results of the first trial.

Water Quality and Growth Simulation of Channel Catfish, Ictalurus Punctatus, in a Recirculating Aquaculture System Combined with Subsurface Flow Wetland

2011 ◽  
Vol 343-344 ◽  
pp. 1109-1116
Author(s):  
Tao Yu ◽  
Fei Zhong ◽  
Dong Xu ◽  
Qiao Hong Zhou ◽  
Wei Liang ◽  
...  
Keyword(s):  
Weight Gain ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Feed Efficiency ◽  
Oxygen Demand ◽  
Stocking Density ◽  
Recirculating Aquaculture System ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Total Weight Gain

Purifying efficiency and culture performance in a recirculating aquaculture system (RAS) combined with subsurface flow wetland (SFW) were investigated in this paper. The results showed that the wetland effectively removed total suspended solids (78.6%), chemical oxygen demand (49.2%), 5-day biochemical oxygen demand (70.4%), total ammonia (53.7%) and nitrite (64.7%) from the aquaculture effluents at a hydraulic loading rate of 344 mm/d. The channel catfish (Ictalurus punctatus) with initial length of 18.97±2.92 cm were reared for 223 days in three recycling ponds at different stocking densities (0.055, 0.109, and 0.164 kg/m3) and a control pond at stocking density 0.055 kg/m3. Fish were fed to satiation twice daily with a commercial diet and the amount fed was measured to determine feed efficiency (FE). In the recycling ponds, fish growth appeared to be negatively correlated with stocking density, in which total weight gain of fish ranged from 374.9% to 886.7%. Fish in the control pond had low survival rate (61.1%) and total weight gain (465.2%), comparing with the recycling pond which had same stocking density (0.055 kg/m3). Feed efficiency (0.34) of the control pond was also significantly lower than that of the 0.055 kg/m3 treatment (0.96). A logistic model of was employed to simulate the growth of channel catfish. The estimated parameters and predicted results showed that the growth rate of channel catfish reared in recycling pond is significantly higher than that in static pond.

scholarly journals Effects of the Feeding Rate on Growth Performance, Body Composition and Hematological Properties of Juvenile Mandarin Fish Siniperca scherzeri in a Recirculating Aquaculture System

2021 ◽  
Vol 13 (15) ◽  
pp. 8257
Author(s):  
Yi-Oh Kim ◽  
Sung-Yong Oh ◽  
Taewon Kim
Keyword(s):  
Body Composition ◽  
Feed Efficiency ◽  
Feeding Rate ◽  
Specific Growth ◽  
Feeding Rates ◽  
Recirculating Aquaculture System ◽  
Mandarin Fish ◽  
Recirculating Aquaculture ◽  
Siniperca Scherzeri ◽  
Aquaculture System

The effects of feeding rate (0.5%, 1.0%, 1.5%, 2.0%, 2.5%, and 3.0% body weight [BW] per day [BW day−1]) on the growth, body composition, and blood properties of juvenile mandarin fish, Siniperca scherzeri, (initial BW 18.4 ± 0.2 g) were investigated in a water recirculating aquaculture system. Triplicate groups of fish were fed an experimental diet (55.4% protein, 14.1% lipid) for 10 weeks. Weight gain and specific growth rate increased with increasing feeding rates of up to 2.5% BW day−1, after which no significant increase in growth was observed. Feed efficiency, protein efficiency ratio, and protein retention were not significantly different among the fish fed 1–2.5% BW day−1 but decreased significantly in those fed 3.0% BW day−1. The lipid content of fish fed 2.5% BW day−1 was significantly higher than that at 0.5–1.5% BW day−1. The total plasma cholesterol content was significantly lower in fish fed 0.5 BW day−1 than fish provided with other feeding rates. Based on the growth, feed efficiency, body composition, and blood content analyses, including regression analysis, the optimal feeding rate for juvenile S. scherzeri weighing between 18 g and 54 g was estimated at 1.88–2.80% BW day−1 depending on weight gain, specific growth rate, and feed efficiency under 26.9 °C conditions.

scholarly journals Biological water treatment in a recirculating aquaculture system

2021 ◽  
Vol 286 ◽  
pp. 03013
Author(s):  
Evelin-Anda Laza ◽  
Ioan Ladislau Caba ◽  
Mihai Olan ◽  
Valentin Vladut
Keyword(s):  
Fish Farming ◽  
Water Filtration ◽  
Fish Ponds ◽  
Recirculating Aquaculture System ◽  
Recirculating Aquaculture ◽  
Biological Water ◽  
Biological Filter ◽  
Aquaculture System ◽  
Biological Water Treatment ◽  
Recycling Systems

Biological water filtration is a process by which toxic compounds are removed from water using organisms. A well-sized biological filter is extremely important as part of a recirculating aquaculture system for fish farming. Biological water filtration equipment in aquaculture recycling systems is a technological set that restores the vital qualities of wastewater from fish ponds, thus allowing its reuse

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