Biol Reprod Lalor Postdoctoral Fellowships -- Application Deadline January 15, 2009
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by WINGFIELD, J. C.
Right arrow Articles by FARNER, D. S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by WINGFIELD, J. C.
Right arrow Articles by FARNER, D. S.
Agricola
Right arrow Articles by WINGFIELD, J. C.
Right arrow Articles by FARNER, D. S.

Biology of Reproduction, Vol 21, 801-806, Copyright © 1979 by Society for the Study of Reproduction

Responses of Photosensitive and Photorefractory Male White-crowned Sparrows (Zonotrichia leucophrys gambelii) to Synthetic Mammalian Luteinizing Hormone Releasing Hormone (Syn-LHRH)

JOHN C. WINGFIELD 1, JOE W. CRIM 1, PHILIP W. MATFOCKS JR. 1, , and DONALD S. FARNER 1

1 Department of Zoology, University of Washington, Seattle, Washington 98195


To assess a possible role of the adenohypophysis in photorefractoriness, photosensitive and photorefractory adult male white-crowned sparrows (Zonotrichia leucophrys) were treated with single intravenous injections of 0, 0.5, 5, 20, 35, 50 or 500 ng of synthetic luteinizing hormone releasing hormone (Syn-LHRH) in 0.9% saline solution. Serial samples of plasma were taken immediately before and at 5, 20 and 60 min after injection. The plasma level of immunoreactive luteinizing hormone (irLH) was not altered by the injection of saline solution alone, or by 0.5 or 5 ng Syn-LHRH in either photosensitive or photorefractory birds. Treatment with 20, 35, 50 or 500 ng Syn-LHRH, however, elicited significant and approximately equal increases in plasma levels of irLH in both groups 5 min after injection. These responses are consistent with the hypothesis that the site of photorefractoriness is at a level higher than the adenohypophysis.

Note:
ACKNOWLEDGMENTS This investigation was supported by NSF Grant No. PCM 77-17690 to D. S. Farner and NIH Grant No. AM-05052 to J. W. Crim. We are indebted to Professor B. K. Follett for the gift of anti-chicken-LH serum and chicken-LH standards.

Submitted on March 30, 1979
Accepted on July 12, 1979




This article has been cited by other articles:


Home page
 EndocrinologyHome page
T. J. Greives, A. O. Mason, M.-A. L. Scotti, J. Levine, E. D. Ketterson, L. J. Kriegsfeld, and G. E. Demas
Environmental Control of Kisspeptin: Implications for Seasonal Reproduction
Endocrinology, March 1, 2007; 148(3): 1158 - 1166.
[Abstract] [Full Text] [PDF]

Home page
 EndocrinologyHome page
S. L. Meddle, D. L. Maney, and J. C. Wingfield
Effects of N-Methyl-D-Aspartate on Luteinizing Hormone Release and Fos-Like Immunoreactivity in the Male White-Crowned Sparrow (Zonotrichia leucophrys gambelii)
Endocrinology, December 1, 1999; 140(12): 5922 - 5928.
[Abstract] [Full Text]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1979 by the Society for the Study of Reproduction.