Comparison of Metabolic Rates of Young of the Year Beluga (Huso huso), Sterlet (Acipenser ruthenus) and Bester Hybrid Reared in a Recirculating Aquaculture System

In the present study, oxygen consumption of two sturgeon species, beluga (Huso huso), sterlet (Acipenser ruthenus), and their hybrid reared in a recirculating aquaculture system were compared over body intervals from 54–107 g to determine the interspecific variation of metabolic rate. Metabolic rates were measured using the intermittent-flow respirometry technique. Standard oxygen consumption rates (SMR, mg O2 h−1) of sterlet were 30% higher compared with beluga and 22% higher compared with bester hybrid. The routine metabolic rate (RMR, mg O2 h−1) averaged 1.58 ± 0.13 times the SMR for A. ruthenus, 1.59 ± 0.3 for H. huso, and 1.42 ± 0.15 for the hybrid bester. However, the study revealed no significant differences (p > 0.05) between mean values of SMR and RMR for beluga and bester hybrid. The scaling coefficient reflected a closed isometry for the hybrid (b = 0.97), while for the purebred species the coefficient of 0.8 suggests a reduction in oxygen consumption with increasing body mass. These findings may contribute to understanding the differences in growth performances and oxygen requirements of the studied species reared in intensive aquaculture system.

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

VESTNIK OF ASTRAKHAN STATE TECHNICAL UNIVERSITY SERIES FISHING INDUSTRY ◽

10.24143/2073-5529-2018-3-111-124 ◽

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.

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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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