A STUDY OF THE FLUCTUATING FACTORS IN THE SEMINIFEROUS EPITHELIAL CYCLE IN MICE : WITH SPECIAL ATTENTION TO STATISTICAL STUDIES ON DIURNAL FLUCTUATIONS AND ON VARIATIONS DUE TO TESTES AND TESTIS LOCI IN THE RELATIVE FREQUENCIES OF THE STAGES

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概要

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• A total of 30 male mice, DD strain, between 50～60 days old, were divided into 6 groups consisting of 5 mice each. All the mice had been reared in an almost constant temperature at between 22〜24℃ and they also had an almost constant daily period of natural and artificial light from about 6 am to about 6 pm. These conditions were maintained throughout the experimental period. The groups were killed at four-hour intervals over a 24-hour period. Cross sections of seminiferous tubules were examined microscopically to determine whether the diurnal fluctuations and variations due to testes within animals or due to loci within testes might exist in the relative frequencies of the stages. Identification of each stage of the cycle applied here was similar to that described previously by ROOSEN-RUNGE & GIESEL. The method of testing for significant differences in the frequencies among groups of each experiment is based on discriminatory analysis and the results obtained were as follows : 1) A typical cellular association arrangement for each stage was found in all but a few seminiferous tubules observed here. 2) No obvious diurnal fluctuation in the relative frequency of the stages was found among the 6 times required for removal of testes or among the uniform periods dispersed throughout a 24-hour period. 3) Significant differences in the frequencies of the stages were found between testes within individuals and among 3 loci within testes (P<0.05).

• 北海道大学の論文

著者

• Sung Weng

  Department Of Veterinary Obstetrics Faculty Of Veterinary Medicine Hokkaido University

• Sung Weng

  Departement D'obstetrique Faculte De Medecine Veterinaire Universite Du Hokkaido

関連論文

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• A STUDY OF THE FLUCTUATING FACTORS IN THE SEMINIFEROUS EPITHELIAL CYCLE IN MICE : WITH SPECIAL ATTENTION TO STATISTICAL STUDIES ON DIURNAL FLUCTUATIONS AND ON VARIATIONS DUE TO TESTES AND TESTIS LOCI IN THE RELATIVE FREQUENCIES OF THE STAGES

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