Authors : Deepthi Perera; Lombini Aquaria

Volume/Issue : Volume 8 - 2023, Issue 5 - May

Google Scholar : https://bit.ly/3TmGbDi

Scribd : https://tinyurl.com/jhmcwdkh

DOI : https://doi.org/10.5281/zenodo.8108760

Abstract : The implementation of high-density nursery systems with recirculating technology has emerged as a promising approach to replace the traditional 10x10 ft cement tank systems in ornamental fish farming. This research paper explores the design, setup, and potential benefits of such a system, aiming to optimize space utilization, improve production efficiency, and reduce environmental impacts. The literature review highlights the successful application of high-density nursery systems in various aquaculture sectors, including finfish, shellfish, and ornamental fish production. These systems offer advantages such as reduced grow-out time, enhanced survival rates, and improved overall production efficiency. The controlled environment provided by highdensity nursery systems allows for efficient management of water quality, feeding regimes, and disease prevention. Furthermore, the integration of recirculating aquaculture systems (RAS) components in these systems enables precise control over water quality parameters, temperature, and feeding practices. Economically, the adoption of high-density nursery systems with RAS technology offers advantages in terms of increased production within limited space. By rearing fish at high densities, farmers can significantly improve overall profitability. The efficient use of space allows for higher stocking densities, leading to increased productivity per unit area. This reduces the need for large land areas and enables farmers to optimize their production capacity. Moreover, the shortened production cycles in high-density nursery systems can lead to faster turnover and quicker returns on investment. From an environmental perspective, high-density nursery systems with RAS technology offer several benefits. The recirculating nature of these systems allows for the continuous reuse of water, reducing water usage and minimizing the discharge of effluents into the environment. The incorporation of advanced filtration systems in RAS ensures the removal of solid waste and the conversion of toxic compounds, promoting water clarity and reducing the release of pollutants. The controlled environment and optimized waste management in high-density nursery systems contribute to maintaining water quality and minimizing the impact on natural water bodies. Additionally, the reduced reliance on wild-caught fish for feed production in highdensity nursery systems has positive environmental implications, conserving wild fish populations and reducing pressure on marine ecosystems. The successful implementation of high-density nursery systems with RAS technology relies on factors such as proper system design, efficient management practices, and adequate training of personnel. A welldesigned system should consider tank configuration, water filtration and treatment, aeration, temperature control, and monitoring systems. Efficient management practices, including regular monitoring of water quality parameters and fish health, are crucial for optimal system performance. Proper training of personnel is essential to ensure effective operation and management of high-density nursery systems. While there are challenges associated with implementing high-density nursery systems, such as the initial capital investment and the complexity of system operation, the potential benefits outweigh these challenges. The increased productivity, cost savings, and reduced environmental impact make high-density nursery systems with recirculating technology a promising alternative to traditional cement tank systems in ornamental fish farming. In conclusion, the implementation of high-density nursery systems with recirculating technology offers significant potential for the transformation of traditional 10x10 ft cement tank systems in ornamental fish farming. By optimizing space utilization, improving production efficiency, and reducing environmental impacts, these systems can contribute to sustainable and profitable aquaculture practices.