The expansion of the white perch, morone americana, population in lake anna reservoir, virginia

Abstract

The expansion of the white perch, Morone americana, population in Lake Anna Reservoir, Va., is documented by examining data resulting from several collection methods. White perch data were derived from annual cove rotenone studies, bimonthly gill net and shoreline electroshock surveys, semiweekly intake screen impingement studies and seasonal entrainment and ichthyoplankton tow surveys. The length of the sampling period ranged from 2 to 7 years depending on how long each method had been employed on the Reservoir and when white perch appeared in each collection. An attempt is made to determine the impact of this expansion upon other species of fish in the reservoir and to address future implications. © 1984 Taylor & Francis Group, LLC.