Pigmented skin tumors in gizzard shad (dorosoma cepedianum) from the south-central united states: range extension and further etiological studies

摘要

Previous studies reported skin tumors diagnosed as pigmented subcutaneous spindle-cell neoplasms in 22/100 of gizzard shad (Dorosoma cepedianum) from Lake of the Arbuckles, Oklahoma, USA, Those studies could not confirm chemical carcinogens or retroviruses as etiological agents. The present study reports the nepolasms in 20/100 of shad form two additional lakes, Lake Murray and Lake Texoma in south-central Oklahoma, extending the range of the lesion. No neoplasms were found in shad from A reference site, Lake Carl Blackwell, Oklahoma.