Title

Thyroxine: Effect on Behavioral Thermoregulation in Fishes

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

DOI

10.1139/z82-125

Peer Reviewed

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