intersex (testicular oocytes) in smallmouth bass from the potomac river and selected nearby drainages.intersex, or the presence of characteristics of both sexes, in fishes that are normally gonochoristic has been used as an indicator of exposure to estrogenic compounds. in 2003, during health assessments conducted in response to kills and a high prevalence of skin lesions observed in smallmouth bass micropterus dolomieu in the south branch of the potomac river, the presence of immature oocytes within testes was noted. to evaluate this condition, a severity index (0-4) was developed based on the ...200718333481
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