Date of Award:
5-1981
Document Type:
Thesis
Degree Name:
Master of Science (MS)
Department:
Wildland Resources
Department name when degree awarded
Wildlife Science
Committee Chair(s)
Ross V. Bulkley
Committee
Ross V. Bulkley
Abstract
Temperatures selected seasonally by adult mountain whitefish were measured in the laboratory in a horizontal gradient. Final preferendum estimates, based on acute (3-hour) preference tests conducted with fish acclimated to 5, 10, and 15 C each season, were 17.7 C (pre-spawning), 11.9 C (post-spawning), 9.9 C (winter), and 16.3 C (spring). Seasonal influence on temperature selection was evident on the basis of differences in final preferenda, covariance analysis of responses of laboratory-acclimated fish, and temperature selection by fish held at ambient river temperatures. Post-spawning and winter groups selected lower temperatures than did pre-spawning and spring groups. Pre-spawning fish selected temperatures unsuitable for embryo survival. Reproductive status as reflected by gonad size was evidently not a factor that influenced seasonal temperature selection of adult whitefish.
Checksum
7bea6decff60d8f07dbcf3a32dd0ed63
Recommended Citation
Ihnat, Jean M., "Seasonal Temperature Preference of Adult Mountain Whitefish, Prosopium williamsoni" (1981). All Graduate Theses and Dissertations, Spring 1920 to Summer 2023. 6342.
https://digitalcommons.usu.edu/etd/6342
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