ABSTRACT
This chapter evaluates effects that moderately heavy stockings (16 ha) of common carp have on aquatic ecosystems in ponds and to compare effects that equal stockings of white amur have on aquatic ecosystems in ponds with similar habitats. Studies of plankton composition in ponds with various fish populations were concerned primarily with the relative abundance of phytoplankton and zooplankton forms. Benthos Statistical analyses indicated no significant differences in number of insects found in any combinations, but examination indicates their existence was less in populations containing common carp. Throughout the course of the pond experiments, periodic seining of bluegill – largemouth bass combinations occurred. From the information obtained by the sampling technique, it was evident that satisfactory bluegill reproduction occurred in all combination ponds during their first summer 1973. In the fed channel catfish-common carp experiment, the entire fish population in one pond was killed by oxygen depletion in June 1974.
