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Details for article 6 of 9 found articles
| Title: |
Seasonal changes in the adrenal medulla of male blossomheaded parakeet in relation to environmental and reproductive cycles |
| Author: |
Maitra, Saumen Kumar |
| Appeared in: |
Biological rhythm research |
| Paging: | Volume 18 (1987) nr. 1 pages 43-48 |
| Year: |
1987-05 |
| Contents: |
The adrenal medulla of male blossomheaded parakeets undergoes seasonal cycles in hormonal concentrations and in the relative number of epinephnne (E) and norepinephrine (NE) cells. NE, but not E, concentrations and cells become significantly (P < 0.001) higher in March than in September and October respectively. The one environmental factor that parallels, though only in part, the annual cycle of the chromaffin tissue is the photoperiod. However, consideration of the sexual periodicity of the parakeet leads to a tentative hypothesis to be tested that active gametogenesis in the testis is correlated with the periodic activity of the adrenal medulla. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 6 of 9 found articles
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