Date of Award:
5-1983
Document Type:
Thesis
Degree Name:
Master of Science (MS)
Department:
Wildland Resources
Department name when degree awarded
Fisheries and Wildlife
Committee Chair(s)
William Helm
Committee
William Helm
Committee
Inge Dirmhirn
Committee
G. Venugopal
Abstract
Brown trout (Salmo trutta), demonstrated an avoidance response to a range of intensities of artificial ultraviolet radiation in a laboratory setting. UV field measurements were made under a variety of riparian canopies in a mountain river system. UV values at various depth regimes were compared with laboratory response values. Results suggested that ultraviolet light could be a factor in the absence of brown trout in particular habitat types at various times during the daylight hours. Visible light intensity response values were also obtained under the same experimental and field conditions. These data suggested that visible light also could be a contributing factor in the absence of brown trout in different habitat types. Visible light may be of equal importance to ultraviolet light in eliciting an avoidance response in brown trout.
Checksum
7b9d4b7ff3dc0ffaffcde9e64db1cc78
Recommended Citation
Lee, Terrence H., "Brown Trout Perception of Ultraviolet Radiation and Possible Influence on Distribution" (1983). All Graduate Theses and Dissertations, Spring 1920 to Summer 2023. 6383.
https://digitalcommons.usu.edu/etd/6383
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