Review Article – Article Example
Photoperiodic Regulation of the Hamster Testis: Dependence on Circadian Rhythms This paper talks about the significance ofthe circadian activity rhythms on the hamsters testes. This is to seek to analyze the effects during pregnancy of a mammal basing on the photoperiodic regulations. The article reveals that, during such periods of conservation of the circadian activity rhythms, the narrow limits of conservation have adaptive significance to the photoperiodism thus, affecting the annual reproductive cycle. The development of this study was triggered by the perception that period of hamsters testicular development is greatly affected by the free running rhythms of circadian activity.
This issue discussed in the paper has its background from the fact that hamsters’ testes are usually formed depending on the duration of photosensitivity to which they are exposed. The study’s findings revealed that when hamsters are exposed to short periods of light or day length, ingesting 2H2O produces a light coincidence with the circadian rhythm of photosensitivity.
In conclusion, the authors’ findings reveal that there is a direct link between the photoperiodic regulations of hamsters’ testes basing on their dependence on circadian rhythms (Nelson et al 109). Totally new in this study is the use of deuterium oxide in the administration of hamsters’ testes.
Questions: 1. Does the analysis of hamsters’ testes lengths reveal a consistent relation with the photoperiodic exposure to circadian activity rhythms?
2. What are the effects of using deuterium oxide on tests of hamster testes?
Nelson, Randy Joe, David L. Denlinger, and David E. Somers. Photoperiodism: the biological calendar. Oxford: Oxford University Press, 2010. Print.