Assessment of Skin and Liver Neoplasms in White Sucker (Catostomus commersonii) Collected at the Sheboygan River Area of Concern, Wisconsin, in 2017

Open-File Report 2019-1014
Prepared in cooperation with the Wisconsin Department of Natural Resources
By: , and 

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Abstract

Two hundred adult white sucker (Catostomus commersonii), age 3 years and older, were collected from the lower Sheboygan River Area of Concern in 2017, during the spring spawning run. Fish were euthanized, weighed, and measured, and any visible abnormalities were documented. Pieces of raised skin lesions as well as five to eight pieces of liver were removed and preserved for histopathological analyses. Skin and liver neoplasm prevalence was determined for assessment of the Fish Tumors or Other Deformities Beneficial Use Impairment. Although 45.5 percent of the suckers had raised skin lesions, the prevalence of skin neoplasms, either papilloma or squamous cell carcinoma, was 29.5 percent. This observation was similar to the prevalence (32.6 percent) of skin neoplasms in 2012; however, the percentage of squamous cell carcinoma was higher in 2017 (9.5 percent) than in 2012 (2.1 percent). The prevalence of liver neoplasms in 2017 (8.5 percent) was similar to that in 2012 (8.3 percent).

Suggested Citation

Blazer, V.S., Walsh, H.L., Braham, R.P., and Mazik, P.M., 2019, Assessment of skin and liver neoplasms in white sucker (Catostomus commersonii) collected in the Sheboygan River Area of Concern, Wisconsin, in 2017: U.S. Geological Survey Open-File Report 2019–1014, 18 p., https://doi.org/10.3133/ofr20191014.

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Acknowledgments
  • Abstract
  • Introduction
  • Methods
  • Biometric Data, Gross Abnormalities, and Microscopic Observations
  • Assessment of Skin and Liver Neoplasms
  • References Cited

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Assessment of skin and liver neoplasms in white sucker (Catostomus commersonii) collected in the Sheboygan River Area of Concern, Wisconsin, in 2017
Series title Open-File Report
Series number 2019-1014
DOI 10.3133/ofr20191014
Year Published 2019
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Leetown Science Center
Description vi, 18 p.
Country United States
State Wisconsin
Other Geospatial Lower Sheboygan River
Online Only (Y/N) Y
Additional Online Files (Y/N) N