I am posting this message for colleagues of mine who are beginning to
study effects of xenoestrogens on sex determination in fish. Replies can be
directed to this news group or to me. Their problem is-----
"Japanese Medaka is reported to be a stable with respect to sexual
dimorphism--thus once it becomes male or female it stays that way. We have
been searching the literature for information regarding the timing of
organ commitment to form ovary or testes in fish, but so far we haven't
found much. The question is: At what point in development is the primordial
gonad (microscopically/histologically) distinguishable as selecting an
ovarian or testicular pathway? Specifically , we are interested in the
Japanese Medaka--but info. on any fish species will be useful."
Thanks for your help!
Chuck
Dr. Charles A. Miller, rellim at mailhost.tcs.tulane.edu
Bionet.Toxicology News Group Discussion Leader
Dept. Environmental Health Sciences
Rm. 374, Center for Bioenvironmental Research
School of Public Health and Tropical Medicine
Tulane University Medical Center
1430 Tulane Ave. Box SL29
New Orleans, LA 70112
Ph. 504-585-6942, Fx. 504-585-6939
