R

  • Raceway: A culture system in long, narrow tanks with a continuous flow of water.

  • Recirculating Aquaculture System (RAS): A super-intensive, closed-loop system where water is treated (mechanical, biological filtration, UV) and continuously reused.

  • REDOX Potential (ORP): An advanced measurement that indicates the oxidation or reduction state of the water, useful for monitoring organic matter decomposition.

  • Residue (Drug): The presence of drugs or their metabolites in the animal's flesh above the permitted limits.

  • Respiration: The metabolic process in which organisms (shrimp, fish, bacteria) consume oxygen and release CO₂ to produce energy.

  • Rotifer: A type of microscopic zooplankton, widely used as the first live feed for marine fish larvae.