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Pigmented skin tumors in gizzard shad ( Dorosoma cepedianum ) from the south‐central United States: Range extension and further etiological studies by David R. Geter; William E. Hawkins; Jay C. Means; Gary K. Ostrander is a Environmental Science article available to read on EtoBox.

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Previous studies reported skin tumors diagnosed as pigmented subcutaneous spindle-cell neoplasms in 22% 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 neoplasms in 20% of shad from 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. Further investigations into the etiology of the lesions were conducted. Significant levels of potentially carcinogenic trace elements in the water, sediment, or tissues were not identified by inductively coupled plasma mass spectrometry. Radioactivity, analyzed by liquid scintillation counting of radon and gross alpha/beta radiation, was not above background levels. Genetic marker and band-sharing analysis by random amplified polymorphic DNA and double-stringency polymerase chain reaction could not separate tumor-bearing shad from nontumor-bearing ones. Of 2,128 shad examined, 387 exhibited lesions, with a significantly higher number occurring dorsally (79.

Who reads Pigmented skin tumors in gizzard shad ( Dorosoma cepedianum ) from the south‐central United States: Range extension and further etiological studies?

Author

David R. Geter; William E. Hawkins; Jay C. Means; Gary K. Ostrander

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley-Blackwell; Wiley; Research Square (ISSN 0730-7268)

Published

1998

Language

EN

Field

Environmental Science (Physical Sciences)