Aquaculture Glossary

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Polymerase chain reaction, a highly sensitive molecular biology technology that allows isolation of DNA fragments by selective amplification of a specific region of DNA.

polychaete worms

A class of generally marine worms whose many segments bear bristly extensions used for movement.


A latter stage of the early shrimp life cycle in which the animals resemble very small adults.


Substances that induce the growth or activity of microorganisms and positively alter their composition in the shrimp gut.


Microorganisms added to shrimp feed or culture systems that are believed to provide beneficial health benefits when consumed.