Early Life History of the Mountain Whitefish Prosopium williamsoni (Girard) in the Logan River, Utah
Date of Award:
5-1972
Document Type:
Thesis
Degree Name:
Master of Science (MS)
Department:
Wildland Resources
Department name when degree awarded
Wildlife Resources
Committee Chair(s)
Robert H. Kramer
Committee
Robert H. Kramer
Committee
Robert White
Committee
Andrew Kahnle
Abstract
Growth and food habits of 399 Age 0 mountain whitefish from the Logan River, Utah, were studied between March, 1970, and April, 1971. At the end of their first six months of life, whitefish were 86-96 mm total length and weighed 6-8 grams (wet). Total temperature experience was 2,950-3,430 degree-days above 32° F. The length-weight relationship for Age 0 mountain whitefish was best described by three stanzas with slopes of 4.3333 for fish 12.5-17.0 mm total length, 3.4437 for fish 17.0-55.0 mm total length, and 2.8043 for fish 50.0-112.0 mm total length. Scalation commenced at 30-35 mm total length and was complete at 40-50 mm total length. Feeding began before yolk-sac absorption was complete and 85 percent of the total diet in numbers was chironomid larvae. Age 0 mountain whitefish in the Logan River fed during daylight and evening hours, and selected chironomid larvae and other food organisms 2-4 mm long.
Checksum
350623acc2b1532f4289db1f303ba4f3
Recommended Citation
Brown, Lawrence Guy, "Early Life History of the Mountain Whitefish Prosopium williamsoni (Girard) in the Logan River, Utah" (1972). All Graduate Theses and Dissertations, Spring 1920 to Summer 2023. 3536.
https://digitalcommons.usu.edu/etd/3536
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