National Water-Quality Assessment (NAWQA) Program
Pesticide National Synthesis Project
Reconnaissance of 17ß-Estradiol, 11-Ketotestosterone, Vitellogenin,
and Gonad Histopathology in Common Carp of United States Streams:
Potential for Contaminant-Induced Endocrine Disruption
By Steven L. Goodbred, Robert J. Gilliom, Timothy S. Gross, Nancy P. Denslow,
Wade L. Bryant, and Trenton R. Schoeb
U.S. Geological Survey Open-File Report 96-627
Figure 3. Male adult carp gonad from Shenandoah River near Millville,
West Virginia showing intratubular basophyllic cells resembling perinucleolar
oocytes among maturing spermatozoa, indicating a possible hermaphrodite.
The carp was 3 years old, 577 mm in length, and weighed 3,041 g.
Next - Figure 4.