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Recirculating aquaculture systems have proven very successful in resolving problems relating to water shortages for fish production and increased yield as the stocking density is important. These systems however consumed much energy in running pumps and heating of water since temperatures play a critical role in fish growth. The main objective of this study is to contribute in putting in place a stable automatic temperature-controlled recirculating aquaculture system capable of using water and energy in an efficient manner. The aim is to develop a system that can use 1000 L of water and grow fish to maturity. The system consisted of a 1000 L capacity tank, a mechanical filter, a bio rock filter, a de-nitrification tank with water hyacinth, an aeration system, a 12 V solar pump, a solar water heating system, and computerized automatic controls using the Arduino microprocessor. Everything was powered by 100 Watts solar module connected through a charge controller to a 200 AH Battery. One hundred catfish fingerlings were raised in a period of 8 months. Water from the fish tank move by gravity to the mechanical filter before being pumped to the bio rock filter. From the bio rock filter, the water moves to the de-nitrification tank. From the de-nitrification tank the automatic control system either sends it back to the fish tank or directs it through the solar water heating if tank temperatures are below 25°C. In order to assess the performance of the system, physical and chemical water parameters were measured. These included the total dissolved solids (TDS), pH, electrical conductivity (EC) temperature, dissolve oxygen, ammonia, nitrite, and nitrates. Results showed that the average daily weight gain of catfish fingerlings was 0.39±0.28 g and that the physical and chemical water quality parameters were at optimum levels for fish growth. It was concluded that such a system can enable farmers to grow fish to maturity in a region with limited water and energy resources.
Business in Cameroon. Cameroon to produce 100,000 tonnes of fish with Aquaculture; 2014.
(Accessed April 4, 2017)
NIS (National Institute of Statistics). Annual statistics of Cameroon Yaoundé, Cameroon. NIS. 2012;456.
MINEPIA. Etudes socio-économiques régional. Yaoundé, Cameroun: MINEPIA. 2012;62.
Pitt CW, Conover MR. Predation at intermountain west fish hatcheries. J Wildlife Manage. 1996;60:616–624.
Ebeling JM, Timmons BM. Recirculating aquaculture systems. In: Tiwel JH, (Ed), Aquaculture production Systems. Lowa, USA: John Willy $ Sons, Inc. 2012;245.
Bartelme RP, McLellan LS, Newton JR. Freshwater Recirculating Aquaculture System Operations Drive Biofilter Bacterial Community Shifts around a Stable; 2017.
Wirsiy YF. Design and construction of an efficient water and solar energy use in recirculating aquaculture system. « Ingénieur d’Agronome » thesis, Deparment of Agricultural Engineering. Dschang, Cameroon: University of Dschang. 2017; 82.
Brett JR. Environmental Factors and Growth. Fish Physiology. Academic Press. 1979;8:599–675
Gadomski DM, Caddell SM. Effects of temperature on early-life-history stages of California halibut Paralichthys californicus. Fish. Bull. 1991;89:567–576.
Fonds M, Cronie R, Vethaak AD, Van der Puyl P. Metabolism, food consumption and growth of plaice (Pleuronectes platessa) and flounder (Platichthys flesus) in relation to fish size and temperature. Neth. J. Sea Res. 1992;29:127–143.
Britz P, Hecht T. Temperature preferences and optimum temperature for growth of African sharp tooth catfish (Clarias gariepinus) larvae and post larvae. Aquaculture. 1987;63:1-4.
Wirawut T, Alounxay P, Suthida W, Supannee S, Sudaporn T, Natthawud D. UN (United Nations), Transforming Our World: The 2030 Agenda for Sustainable Development. New York, USA: United Nations. 2015;31.
Fuller RJ. Solar heating systems for recirculation aquaculture. Agricultural Engineering. 2007;36:250-260.
Cromer CP. Solar swimming pool heating in florida collector sizing and economics. Florida University Centre. 1994;13:1-3.
Liao BP, Mayo DR. Intensified fish culture combining water reconditioning with pollution abatement. Aquaculture. 1974;3: 61–85.
Summerfelt ST, Bebak-Williams J, Tsukuda S. Controlled systems: Water reuse and recirculation. In: Wedemeyer, G. (Ed.), Fish Hatchery Management. American Fisheries Society, Bethesda, MD. 2001;285–395.
Eding EH, Kamstra A, Verreth JAJ, Huisman EA, Klapwijk A. Design and operation of nitrifying trickling filters in recirculating aquaculture: A review. Aquacultural Engineering. 2005;34:234–260.
Thomas LM, Michael MP, Rakocy EJ. Recirculating aquaculture tank production systems. A review of component options. SRAC, No-453. Rossville, USA: SRAC. 1999;23.
Anyanwu DC, Nnadozie CH, Ogwo OV, Okafor EO, Umeh IO. Growth and nutrient utilization of Clarias gariepinus fed dietary levels of jackbean (Canavalia ensiformis) Meal. Department of Agriculture Science. Owerri, Nigeria: Alvan Ikoku Federal College of Education. 2012;54.