PHOTOPERIODIC CONTROL OF TESTIS ACTIVITY IN THE VOLE, MICROTUS AGRESTIS

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Authors:
C. ANNE GROCOCK
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and
J. R. CLARKE
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DOI:
https://doi.org/10.1530/jrf.0.0390337
Volume/Issue:
Volume 39: Issue 2
Page Range:
337–347
Article Type:
Research Article
Online Publication Date:
Aug 1974
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Summary.

In voles, growth of testes and the onset and maintenance of their spermatogenic and endocrine activity are influenced by light. From experiments employing several different photoperiods recurring every 12, 24, 36 or 48 hr, it seems that the effect of a photoperiod depends on the time of its occurrence during the day. Voles appear to have an endogenous circadian rhythm of photosensitivity. It is suggested that testes mature more rapidly or are maintained in a more active state if the external light stimulus coincides with the postulated endogenous photosensitive period.

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Print ISSN:
1470-1626
Online ISSN:
1741-7899