PMID: 6413293Aug 1, 1983Paper

Annual variation in the concentrations of circulating hormones in capercaillie (Tetrao urogallus)

General and Comparative Endocrinology
R HissaR J Etches

Abstract

Seasonal variation in the levels of immunoreactive lutropin (LH), follitropin (FSH), prolactin (PRL), corticosterone (B), thyroxine (T4), and triiodothyronine (T3) was measured in the plasma of male and female capercaillies (Tetrao urogallus, Galliformes) in captivity (latitude N 67 degrees). In male capercaillies there was an increase in the concentrations of LH and FSH beginning in March and reaching their maxima in May, which correlated with the nesting period. The concentration of plasma PRL increased from the end of April and reached its highest level simultaneously with the rapid fall of plasma LH and FSH concentrations. It remained elevated until August, Plasma T4 level was depressed after levels of plasma FSH and LH had reached their maxima and was correlated to simultaneous elevation of plasma PRL level. No dramatic seasonal changes in plasma T3 level were noted. In the female capercaillie no marked changes in plasma FSH and LH concentrations were observed. Although four of six females laid eggs only one of them managed to terminate its nesting successfully; five eggs hatched. Changes in prolactin concentration in females parallel those in males. No marked variations were observed in plasma corticosterone concentration...Continue Reading

Citations

Feb 1, 1985·General and Comparative Endocrinology·J P DittamiB K Follett
Jan 1, 1986·Comparative Biochemistry and Physiology. A, Comparative Physiology·S SaarelaH Rintamäki
Mar 22, 2005·Hormones and Behavior·L Z GaramszegiA P Møller
Nov 25, 1998·Comparative Biochemistry and Physiology. Part C, Pharmacology, Toxicology & Endocrinology·P J SharpR W Lea
May 29, 2000·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·T Liukkonen-AnttilaR Hissa
Jan 10, 1998·General and Comparative Endocrinology·B SilverinS Ishii
Nov 1, 1989·General and Comparative Endocrinology·C K BluhmW H Burke
Feb 15, 2012·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·N F ElarabanyA E Said
Sep 17, 2019·Hormones and Behavior·John C WingfieldGregory F Ball

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