Science News Week of Feb. 5, 2000; Vol. 157, No. 6 pg.87

DDT treatment turns male fish into mothers

(DDT turning boys into girls)

Injecting into fish eggs an estrogen-mimicking form of the pesticide DDT transforms genetically male Medaka fish into apparent females able to lay eggs that produce young.


Edmunds, J.S.G., R.A. McCarthy, and J.S. Ramsdell. 2000.

Permanent and functional male-to-female sex reversal in d-rR strain medaka (Oryzias laptipes) following egg microinjection of o, pī-DDT. Environmental Health Perspectives


Further Readings:

Adler, T. 1995. Fishy sex. Science News 148(Oct. 21):266.

Raloff, J. 1999. Pollutant waits to smite salmon at sea. Science News 155(May 8):293.

______. 1997. Is synergy of estrogen mimics an illusion? Science News 152(Aug. 2):69.

______. 1995. Beyond estrogens. Science News 148(July 15):44.

______. 1994. The gender benders. Science News 145(Jan. 8):24.


From Science News, Vol. 157, No. 6, February 5, 2000, p. 87.