Some aspects of thyroid physiology in rainbow trout

✍ Scribed by Fromm, Paul O. ;Reineke, E. P.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1956
• Tongue: English
• Weight: 604 KB
• Volume: 48
• Category: Article
• ISSN: 0095-9898
• DOI: 10.1002/jcp.1030480304

✦ Synopsis

A compact thyroid gland has been described in the swordfish (Xiphias) by Addison and Richter ( '32) and in the Berniuda parrot fish (Sparisoma sp.) by Smith and Uatthews ('48). However, in most teleosts the thyroid consists of follicles scattered in the connective tissue along the ventral aorta aiid afferent branchial arteries as described by Guderiiatsch ('11) and Hoar ('39) and for this reason surgical tliyroidectomy is impossible.

3lattliews aiid Smith ('48) have shown that the parrot fish tliyi-oicl gland concentrates 1 ~3 ~ and similar results have been obtained on other teleost and elasmobranch fish. Gorbman et al. ( '52) have reported that thyroxine syntliesis by the shark (ScpZiorhinus cmziculn) appears to follow the same route as in mammals. Similar results were found with Platyfish (Berg and Gorbman, '53).

La Roche and Leblond ( '54) noted that every thyroid follicle in the Atlantic salmon accumulates injected radioiodine and successive monthly injections of 100, 50, 40 and 30 IJC of caused complete destruction of thyroid follicles in the experimental animals.

This approach to thyroidectomy affords an ideal way to study the effect of the thyroid on oxygen consumption in fish. Previous literature, for the most part, has demonstrated in Published with the approval of the director, Michigall Agricultural Esperirnent Station, as journal series no. 1828.