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Consider the following statements regarding Recirculatory Aquaculture System (RAS).
  1. In Recirculatory Aquaculture System (RAS), water is recycled and reused after mechanical and biological filtration.
  2. It is an intensive high-density fish culture and the method can be used for only specific species of fishes.
  3. This method mainly involves growing of fish outdoors in open ponds.
How many of the above statements are correct?
  • a)
    Only one 
  • b)
    Only two 
  • c)
    Only three 
  • d)
    None
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Consider the following statements regarding Recirculatory Aquaculture ...
Only statement 1 is correct.
  • Recirculatory Aquaculture System (RAS) is a technology where water is recycled and reused after mechanical and biological filtration and removal of suspended matter and metabolites.
  • This method is used for high- density culture of various species of fish, utilizing minimum land area and water.
  • It is an intensive high-density fish culture unlike other aquaculture production systems.
  • Instead of the traditional method of growing fish outdoors in open ponds and raceways, in this system fish are typically reared in indoor/outdoor tanks in a controlled environmen
  • The technology is based on the use of mechanical and biological filters and the method can be used for any species grown in aquaculture.
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Most Upvoted Answer
Consider the following statements regarding Recirculatory Aquaculture ...
Recirculatory Aquaculture System (RAS)

Statement 1: In Recirculatory Aquaculture System (RAS), water is recycled and reused after mechanical and biological filtration.
Statement 2: It is an intensive high-density fish culture and the method can be used for only specific species of fishes.
Statement 3: This method mainly involves growing fish outdoors in open ponds.

Explanation:
Statement 1: In a Recirculatory Aquaculture System (RAS), water is indeed recycled and reused after mechanical and biological filtration. This is one of the key features of RAS, where water is continuously circulated and treated to maintain optimum water quality for fish farming. Mechanical filtration involves removing solid waste particles from the water, while biological filtration involves the use of beneficial bacteria to convert harmful ammonia into less toxic nitrate.

Statement 2: This statement is incorrect. RAS is a highly advanced and intensive fish farming method that can be used for a wide range of fish species. It is not limited to specific species of fishes. RAS allows for high-density fish culture, where a large number of fish can be raised in a relatively small space while maintaining optimal water conditions. The controlled environment of RAS provides better control over water quality, temperature, and feeding, resulting in higher growth rates and reduced disease risks.

Statement 3: This statement is incorrect. RAS is an indoor fish farming system that does not involve growing fish outdoors in open ponds. The main characteristic of RAS is its closed-loop system, where water is continuously recirculated within the system, minimizing water usage and environmental impacts. RAS facilities typically consist of tanks or raceways where fish are grown, along with various filtration and water treatment components.

Therefore, only Statement 1 is correct.
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Consider the following statements regarding Recirculatory Aquaculture System (RAS). In Recirculatory Aquaculture System (RAS), water is recycled and reused after mechanical and biological filtration. It is an intensive high-density fish culture and the method can be used for only specific species of fishes. This method mainly involves growing of fish outdoors in open ponds.How many of the above statements are correct?a)Only oneb)Only twoc)Only threed)NoneCorrect answer is option 'A'. Can you explain this answer?
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