Water Quality and Waste Contamination Study in Catfish Rearing Recirculating Aquaculture System (original) (raw)
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Important Water Quality Parameters in Aquaculture: An Overview
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Influence of water quality on fish productivity
The physical, chemical and bacteriological parameters of water in fish ponds were investigated with a view to optimize the conditions for fish productivity by using three private fish farms with different water supplies. Water and fish samples were collected equally from each pond over a period of 17 months. Water temp., Dissolved oxygen (DO), pH, Ammonia, Nitrite, Nitrate, and bacterial count were determined. The average values of bacterial, parasitic, survival and growth rates of fish were also assessed. Results revealed that pond water in farm (III) had the highest averages of temperature nitrite, nitrate 31.8±1.5, 8.18± 0.9, 0.41 ± 0.06 , 3.79 ± 0.6 resp., with the least content of DO 3.6 ± 0.7 followed by farm (II),which had also the highest mean values of NH 3
Optimalization of Water for Nursery and Rearing of Asian Redtail Catfish (Mystus nemurus C.V)
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Fish culture activities usually release wastes to environments such as faeces, urine, uneaten food and other by-product metabolism activities. For increased water quality, ideally in aquaculture media, various methods could be used, such as filtering techniques and sinking and dissolving methods. Various filter materials could be used to increase water quality, such as silt, gravel, charcoal, coconut shell, palm fiber, and zeoliteThe study on the effect of recirculation systems using various filter materials and aquaponic systems on water quality has been carried out. Several filter materials were used in four kinds of treatment, namely aquarium using aerators (control), aquarium using silt, gravels and palm fiber (recirculation), aquarium using mustard greens (aquaponic system) and aquarium using spoons (recirculation). The study results showed that different filter materials significantly affected nitrate and nitrite concentration in the catfish culture media. It was invented tha...
Water quality index as a simple indicator of aquaculture effects on aquatic bodies
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Oxygen Consumption - Journal of Applied Aquaculture
The pink shrimp Farfantepenaeus brasiliensis is native in southern Brazil and is potentially suited for aquaculture. Under intensive culture, the accumulation of nitrogenous compounds results from excretion by the shrimp and from the processes of feed decomposition and nitrification. The objective of this study was to evaluate ammonia, nitrite, and nitrate toxicity effects on oxygen consumption of juvenile pink shrimp. Shrimps (initial weight 0.7 ± 0.15 g) were exposed over a period of 30 days to 50%, 100%, and 200% of the safe levels of total ammonia (TAN = 0.88 mg/L), nitrite (NO 2 − = 10.59 mg/L), and nitrate (NO 3 − = 91.20 mg/L) for the species. The specimens were individually collected and placed in respirometry chambers, where the oxygen consumption was measured over a period of two hours. Throughout the experiment there was no significant difference (p > 0.05) among treatments in terms of survival and growth. The pink shrimp juveniles exposed to nitrogen concentrations of 200% of the nitrite and nitrate safe level showed the highest oxygen consumption (p < 0.05).
Base on the principle of developing a suitable aquaculture system that will fit the present climate and environmental challenges to enhance breeding and production in aquaculture. Against the backdrop of issues connected to water quality in recirculating aquaculture system which has negative impact on the fish comfort, feeding rate and blood biochemistry, this may later affect its growth performance and general wellbeing. Although, the rate of waste disintegration and the bacteria species present in the filter system determine the physicochemical parameters of the treated water, which further affect the biological characteristics of the fish. This study intends to reveal the effect of biological filtration media (wood coal, rice hulls and wheat hay) on water properties and its further effects on growth performance, plasma biochemistry, liver and gills histopathology of common carp in RAS. After the acclimation interval, 24 tanks were stocked with 8 fish average initial weight of 15.74 g. However, treatments were assigned to each tank at random sampling to make four treatments. The results showed a significant effect on Common carp growth and body biomass, for those with filter media compared to the control. Though, a better growth performance of Common carp culture in water exposed to wheat hay and rice hulls were recorded at significant level with lower FCR. Hence improvement in fish productivity was observed in the treatments compared to the control. Moreover, there are significant changes on cell counts, and plasma biochemistry parameters. In synopsis, the study reveals the benefits in using additional media such as wheat hay and rice hulls as a biological filter media to improve water quality and growth performance of common carp in aquaculture. The use of this new media should be encourage since the installation of this biological filter media is simple, affordable and can be retrofitted into existing systems, to increase water management and aquaculture productivity.
Effluent Quality of a Locally Designed Recirculation Aquaculture System
The study presents the assessment of water quality of a recirculation aquaculture system (RAS). In this study, a laboratory-scale recirculation aquaculture plant was designed and fabricated to reduce, recycle and reuse fish farm wastewater. The system incorporates trickling filter as a biological treatment processes. Development of bacteria on the trickling filter was done by continuous recirculation of highly concentrated fish farm waste water for 16 days when a considerable mass of bacteria enough for nitrification was observed to have developed. In the experiment, two different systems were compared: a RAS with trickling filter and a conventional open pond system. A sample of effluent from the trickling filter was analyzed for ammonia, nitrite, nitrate, dissolved oxygen, pH and total suspended solid. The result of the analysis showed that the water parameters in RAS were within acceptable level for African catfish culture; 32.89L of water was used up in the RAS for the 21 days culture and percentage increase in weight ranging from 17.69% -37.05% was observed in the RAS. This shows that the system was effective in producing required effluent quality for catfish fish rearing.
Importance of Optimum Water Quality Indices in Successful Ornamental Fish Culture Practices
Parishodh Journal, 2020
Ornamental fish keeping is the second most preferred hobby in the world and the number of hobbyists for ornamental fish keeping is rising day by day because it provides a great opportunity for entrepreneurship development and income generation. Aquatic ecosystems are dynamic and even in small rearing water tanks, physical and chemical parameters are interrelated. Thus, physical and chemical parameters of water should be considered and analyzed together because all of these factors have a direct impact on the culture systems.Ornamental fish production unit required higher level of expertise for better water quality management as ornamental fishes are more sensitive to poor water quality. As ornamental fish are kept in tanks more numbers than their food fish counterparts, water quality is most critical. Where large numbers of fish are kept in small spaces, the build-up of nitrogenous wastes, most notably ammonia, requires the producer to implement measures to manage it properly. Regular water exchange along with proper aeration overcomes this type of problem in the tanks.This review discussed the relationship between the health and better rearing conditions of fishes.
Water quality management in aquaculture
book and this manual was research on warm water pond fish culture in the Southern United States. However, all of the principles and methods are general and applicable to fish culture in other regions including culture of fish in brackish water and sea water ponds. 600 400 200 0 * Number in parentheses indicates the reference in the Bibliography at the end of each chapter.