The Effects of Ultraviolet Light on Rainbow Trout Embryos

Scientific Disciplines
Biological Sciences - Aquatic
Montana State University
rainbow trout
Fish management
light radiation
ultraviolet light
Volume 16, No. 4

The effects of ultraviolet light on rainbow trout embryos
Beth Shedden, Department of Ecology, Montana State University, Bozeman, Montana 59717  beth.
Jackson A. Gross and Robert E. Gresswell, U.S. Geological Survey, Northern Rocky Mountain 
Science Center, Montana State University, Bozeman, Montana 59717, 
Molly Webb, USDI Fish and Wildlife Service, Bozeman, Montana 59715
There currently exists a need to develop new approaches to control aquatic invasive 
and nuisance species. The effects of light radiation such as ultra-violet wavelengths of 
light have shown negative effects, such as increased embryo mortality in early embryonic 
salmonid larvae. This study explores the use of light radiation for eradication of invasive fish. 
Experiments were conducted to evaluate dose and critical period of sensitivity for mortality 
of rainbow trout (Oncorhynchus mykiss) embryos after exposure to visual and ultra-violet 
light radiation. Endpoints recorded include exposure intensity, effective distance from source, 
duration of exposure, malformations and mortality. Introduced light may be an effective and 
feasible eradication technique of early life history stages of fish and invertebrate invasive 
species in situ, as light can be implemented and removed with minimal environmental impact.