Abstract
ABSTRACT One thousand silver carp (Hypophthalmichthys molitrix) and 500 bighead carp (Aristichthys nobilis) were introduced into a small shallow pond in Arvada, Colorado during March 1992. The pond had nuisance algal problems and was matted with Rhizoclonium spp. During the three-year study period (1992–1994), turbidity increased from 9 NTU to 15 NTU (p<0.05), mean chl a concentrations increased from 42.60 μg/L to 78.79 μg/L (p<0.05), total phytoplankton concentrations decreased from 192,000 #/mL to 105,000 #/mL (p<0.05), total zooplankton densities decreased from 3100 #/L to 555 #/L (p<0.05), total phosphorus increased from 0.090 to 0.143 mg/L (p<0.05), and total inorganic nitrogen increased from 0.220 to 1.125 mg/L (p<0.05).
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