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178
Rutilus rutilus
Roach (inc. hybrids)
Hermaphrodite
Unknown - possibly genetic aberration
Unknown - possibly genetic aberration
Only one fish submitted but several fish known to be affected. Poor fecundity of roach in this area. Probable evidence of endocrine disruption. Topic became prominent in the 1990's.
Mixed testicular and ovarian tissues from the same fish.
Yorkshire
ENGLAND
Dr. C. Andrews
7/14/1981