Which system is often used for aquaculture production in an indoor environment?

Recirculating Aquaculture Systems (RAS) are designed specifically for aquaculture production in controlled indoor environments. This technological system is highly efficient because it recycles water, which helps to maintain optimal water quality for the aquatic organisms being farmed. RAS allows for precise control over environmental variables such as temperature, pH, and oxygen levels, which is essential for the health and growth of fish and other aquatic species.

The system operates by continuously filtering and treating the water, enabling it to be re-used multiple times rather than being continuously discharged and replaced. This not only conserves water but also minimizes the risk of contamination and disease, common concerns in aquaculture. Additionally, RAS can be set up in areas where land and water resources are limited, making it a versatile choice for aquaculture operations.

In contrast, systems like cages, stream systems, and raceways are often utilized in outdoor environments. Cages typically depend on natural water bodies for water exchange, raceways often require significant water flow from external sources, and stream systems function similarly to raceways but use flowing water from natural streams or rivers. These options may not provide the controlled conditions that RAS can achieve, making RAS the preferred system for indoor aquaculture production.