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816
Rutilus rutilus
Roach (inc. hybrids)
Intersex
Gonad
Putative endocrine disruption
Putative endocrine disruption
Length 33cm, 18/4/1988
Occasional finding in Roach from the Baltic Sea.
Normal testicular tissue replaced by oocytes in varying stages of development. Extensive fibrosis throughout the affected area. Larger oocytes infected with the microsporidian parasite Ovopleistophora mirandellae, surrounded by a fibrous capsule.
Aland Islands
Baltic Sea
Finland
Dr Tom Wiklund
6/2/2004