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

---

Figures 2A - 2D

---

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.

Back to:
Methods