Thomas C. Jones

Temperature Preferences By Two Species Of Fish And The Influence Of Temperature On Fish Distribution

Experiments were conducted to determine the preferred temperatures and the final preferenda of Pimephales promelas and Lepomis cyanellus. Specimens of P. promelas and L. cyanellus were acclimated to five and four different temperatures for 30 days. A gradient tank was built permitting a temperature gradient of 2° C. per chamber. Openings in the partitions between the chambers let the fish move freely throughout the tank. One fish was used to a test and ten tests for each acclimation level. Recordings of the position of each fish were made every 15 seconds for 40 minutes. The temperatures...