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Biology of Reproduction, Vol 15, 254-259, Copyright © 1976 by Society for the Study of Reproduction

Brain Monoamine Metabolism of Turkey Hens in Various Stages of Their Reproductive Life Cycle

M. E. EL HALAWANI 1, and W. H. BURKE 1

1 Department of Animal Science, University of Minnesota, St. Paul 55108


The metabolism of dopamine (DA), norepinephrine (NE), epinephrine (E), and serotonin (5-HT) was determined in the brains of female turkeys before and after light stimulation, and during various phases of reproductive activity.

Ten days of light stimulation increased oviduct weight 3.5 fold (P<0.05). This was associated with a significant elevation of both NE and E synthesis. However, such treatment was without significant changes in either DA or 5-HT metabolism.

As female turkeys progressed from the laying phase of the reproductive cycle to broodiness, the ovarian and oviduct weights decreased progressively. DA synthesis was found to increase during gonadal regression, and 5-HT synthesis was elevated in birds with complete ovarian regression.

 Submitted on January 27, 1976
Accepted on May 3, 1976




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