Jeffrey W. Foltz

Production of Phytoplanktivorous Silver Carp in a Eutrophic Dairy Farm Impoundment

Suitability of silver carp (Hypophthalmichthys molitrix) as a biological agent in controlling phytoplankton was studied in situ in 3 sequential dairy farm ponds in Anderson County, South Carolina. Concentrations of chlorophyll a, soluble orthophosphate and associated water quality parameters were measured biweekly from May 1979 through May 1980 prior to introduction of silver carp (100-150 mm total length; 23.1 g average weight) to 1 pond on 12 June 1980. Water chemistry measurements continued through October 1980. Increases of chlorophyll a concentrations in 1980 over 1979 values were 5...


Fish Species Diversity and Abundance in Relation to Stream Habitat Characteristics

Fish species diversity and abundance were examined over a 3 year period at 6 study sites within a single watershed in the Piedmont of South Carolina. The fish community was dominated by 3 cyprinid species, but included 22 species. Average Shannon-Weaver fish species diversity estimates ranged from 0.15 to 1.87, and were related to substrate diversity. Fish species diversity increased downstream, and decreased in relation to silt in the substrate and frequency of drying. Fish abundance increased downstream and with depth, but was also influenced by substrate characteristics known to...