Skip to main content
U.S. flag

An official website of the United States government

Channel catfish response to ultraviolet-B radiation

January 1, 1999

Fingerling channel catfish Ictalurus punctatus exposed to simulated ultraviolet-B radiation at an average daily dose of 2.9 J/cm2 were quite sensitive to the radiation. After a 24-h exposure, thinning of the most dorsal epidermis frequently was accompanied by edema. Compared with epidermis of unexposed fish, mucous cells in exposed fish were less superficial and club cells were less numerous both dorsally and high on the lateral surface of the body. Sunburn cells with pyknotic nuclei were evident in the epidermis of exposed fish. Among fish exposed for 48 h, focal necrosis and sloughing of the outer epidermal layer were widespread. A methanol-extractable skin substance that is associated with resistance to sunburn in other fish species was not detected in channel catfish.

Citation Information

Publication Year 1999
Title Channel catfish response to ultraviolet-B radiation
DOI 10.1577/1548-8667(1999)011<0192:CCRTUB>2.0.CO;2
Authors M. S. Ewing, V. S. Blazer, D. L. Fabacher, E. E. Little, K. M. Kocan
Publication Type Article
Publication Subtype Journal Article
Series Title Journal of Aquatic Animal Health
Index ID 1014803
Record Source USGS Publications Warehouse
USGS Organization Columbia Environmental Research Center; Leetown Science Center

Related Content