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Description of Method - Triploid Grass Carp. The grass carp, also known as the white amur, is a vegetarian fish native to the Amur River in Asia. Because this fish feeds on aquatic plants, it can be used as a biological tool to control nuisance aquatic plant growth. In some situations, sterile grass carp may be permitted for introduction into Washington waters.
This predator-prey relationship of the aquatic food chain takes place virtually everywhere year âround. Bluegills, sunfish, perch, crappies, and minnows feed directly on zooplankton, confirmed from observation and by examining stomach contents. Not only do panfish eat zooplankton, but they thrive upon it. Studies in Michigan suggest that lakes producing big zooplankters tend to produce big bluegills.