Assay of Serum Thyroxine

Seasonal changes in serum levels of growth hormone, cortisol and thyroxine in calves and adult Spitzbergen reindeer (Rangifer tarandus platyrynchus) were measured and compared to those previously found in Norwegian reindeer (R.t. tarandus). Cortisol did not differ significantly between summer and winter, or between the subspecies. Growth hormone and thyroxine exhibited highly significant seasonal changes and subspecific differences: winter levels of growth hormone were much higher than summer levels in the Spitzbergen reindeer, while Norwegian reindeer differed very little from season to season. Both Spitzbergen and Norwegian reindeer had markedly reduced thyroxine levels during winter, but the values from the former were much lower than those from the latter. In summer, however, the levels were equal. The high levels of growth hormone and low levels of thyroxine in the Spitzbergen reindeer during winter are indicative of high lipolytic activity and a reduced metabolic rate, respectively.

show abstract

Ateliotic Dwarfism in the German Shepherd Dog

Lund‐Larsen¹,

Grøndalen²

1976

Acta Vet Scand

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Assay of Serum Thyroxine

Cited by 3 publications

References 5 publications

Seasonal changes in levels of growth hormone, somatomedin and thyroxine in free-ranging, semi-domesticated norwegian reindeer [Rangifertarandus tarandus (L.)]

Seasonal changes in levels of growth hormone, somatomedin and thyroxine in free-ranging, semi-domesticated norwegian reindeer [Rangifertarandus tarandus (L.)]

The Spitzbergen reindeer‐a winter‐dormant ungulate?

Ateliotic Dwarfism in the German Shepherd Dog

Contact Info

Product

Resources

About