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 2. Photomicrographs (7) showing state of sexual maturation in
female and male adult carp
Figure 2A. Female adult carp ovary from Platte River at Louisville,
Nebraska, with perinucleolar oocytes at various stages of previtellogenic
growth. Some larger oocytes show indications of cortical alveoli stage;
classified as stage 0, undeveloped. The carp was 8 years old, 368 mm in
length, and weighed 672 g.
Figure 2B. Female adult carp ovary from South Platte River at Denver, Colorado,
showing mixture of perinucleolar and cortical alveoli oocytes. Larger oocytes
are early vitellogenic; classified as stage 1, previtellogenic. The carp was
7 years old, 604 mm in length, and weighed 2,900 g.
Figure 2C. Female adult carp ovary from Platte River at Louisville, Nebraska,
containing some vitellogenic oocytes with moderate numbers of vitelline
granules and a few perinucleolar and cortical alveoli oocytes. Two atretic
oocytes (left and upper center) show granuosa cell hypertrophy; classified
as stage 2, early vitellogenic. The carp was an undetermined age, 592 mm in
length, and weighed 2,948 g.
Figure 2D. Female adult carp ovary from Hudson River, south of Lake Luzerne,
New York, showing fully developed oocytes with numerous vitelline granules
along with a few oocytes in earlier stages of development; classified as
stage 3, late vitellogenic. The carp was 8 years old, 727 mm in length, and
weighed 6,200 g.
Figure 2E. Male adult carp testis from Platte River at Louisville, Nebraska,
showing thick germinal epithelium with diffuse pronounced proliferation and
maturation of spermatozoa; classified as stage 1, early spermatogenic. The
carp was 8 years old, 475 mm in length, and weighed 1,454 g.
Figure 2F. Male adult carp testis from Hudson River, south of Lake Luzerne,
New York, showing moderately thick germinal epithelium with diffuse moderate
proliferation and maturation of spermatozoa; classified as stage 2,
mid-spermatogenic. The carp was 2 years old, 518 mm in length, and weighed
2,334 g.
Figure 2G. Male adult carp testis from Anacostia River at Washington Shipping
Channel, District of Columbia, where germinal epithelium is mostly thin with
only scattered spermatogenic activity characteristic of full-grown testes;
classified as state 3, late spermatogenic. The carp was 5 years old, 530 mm
in length, and weighed 2,286 g.
Next - Figure 3.
U.S. Department of the Interior | U.S. Geological Survey
