Thyroxine: Effect on Behavioral Thermoregulation in Fishes

Authors

William W. Reynolds
Martha E. Casterlin
Richard E. Spieler, Milwaukee Public MuseumFollow

Document Type

Article

Publication Date

1982

Publication Title

Canadian Journal of Zoology

ISSN

0008-4301

Volume

60

Issue/No.

5

First Page

926

Last Page

928

Abstract

Exposure to thyroxine in the ambient water significantly lowered the preferred temperatures of two fish species. Acute exposure to thyroxine at a concentration of 20 μg/L of water lowered the preferred temperature by approximately 2 °C, while chronic exposure to the same concentration for 14 days prior to testing lowered the preferred temperature by as much as 10 °C. Chronic exposure for 14 days to thiourea (0.33 g/L), a thyroxine antagonist, raised the preferred temperature by 2.6 °C. These results suggest a role of thyroid hormones in thermoregulatory behavior of ectothermic vertebrates.

Comments

©1982 National Research Council of Canada/Conseil national de recherches du Canada

NSUWorks Citation

William W. Reynolds, Martha E. Casterlin, and Richard E. Spieler. 1982. Thyroxine: Effect on Behavioral Thermoregulation in Fishes .Canadian Journal of Zoology , (5) : 926 -928. https://nsuworks.nova.edu/occ_facarticles/195.

DOI

10.1139/z82-125