Seasonal Variations in Circadian Levels of Serum Prolactin in Striped Mullet, Mugil cephalus

Authors

Richard E. Spieler, Louisiana State UniversityFollow
Albert H. Meier, Louisiana State University
Harold C. Loesch, Louisiana State University

Document Type

Article

Publication Title

General and Comparative Endocrinology

ISSN

0016-6480

Publication Date

5-1976

Abstract

Plasma concentrations of prolactin were estimated by radioimmunoassay throughout a day at three seasons of the year (summer, fall, and winter) in the striped mullet, Mugil cephalus. Daily rhythms were found at each season. In addition, the patterns of the rhythms with respect to the daily photoperiod differed from one another. The data are consistent with the hypothesis that a seasonal change in the daily rhythm of prolactin has an important role in regulating the seasonal changes in physiology of some animals.

DOI

10.1016/0016-6480(76)90017-4

Volume

29

Issue

1

First Page

156

Last Page

160

Comments

©1976 Published by Elsevier Inc.

Additional Comments

NSF grant #: GB 42690

NSUWorks Citation

Richard E. Spieler, Albert H. Meier, and Harold C. Loesch. 1976. Seasonal Variations in Circadian Levels of Serum Prolactin in Striped Mullet, Mugil cephalus .General and Comparative Endocrinology , (1) : 156 -160. https://nsuworks.nova.edu/occ_facarticles/209.