To Become Commercially Viable, Recirculating Aquaculture Systems (RAS) Will Have

question 50

Multiple Choice

To become commercially viable, recirculating aquaculture systems (RAS) will have to overcome several challenges. Choose the correct matching of a challenge that RAS has to overcome with its solution.

• A) most commercially important marine fish would not reproduce in captivity - development of a hormone supplement for the fish that tricks captive fish into breeding as they would in the wild
• B) since fish raised in RAS setups are typically higher-trophic-level species, they still consume wild caught fish, maintaining the pressure on fisheries - locate RAS operations near coastal areas where it is easy to obtain wild caught fish
• C) RAS operations generate a lot of waste - experiment with a variety of alternative feeds that make the fish produce less waste
• D) RAS has high start-up and operating costs - employ carefully calibrated microbial communities that convert the fish waste into fuel-grade methane which offsets some of the energy costs
• E) A and D

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