Oviposition sites of Corydalus cornutus (Megaloptera : Corydalidae) in eastern Texas

摘要

Previous studies of oviposition sites of Corydalus cornutus have been restricted to large lotic systems. Attempts were made to correlate parameters of streams and oviposition sites in a small stream from early to late summer 2004 in Walker Co., Texas. Height of egg mass above surface of water, depth of water below egg mass, distance of oviposition to nearest shore, width of stream, distance to previous riffle, distance to next riffle, and velocity of water were measured to determine preference of sites for oviposition. At two study sites on a stream containing riffled areas, 94 egg masses were examined to determine their position. Significant correlations existed between width of stream and height of oviposition above water.