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http://dx.doi.org/10.13047/KJEE.2015.29.4.525

A Study on the Testicular Cycle of Asian Toad (Bufo gargarizans)  

Park, Se-Hwa (NSenc)
Ko, Sun-Kun (Dept. of Physical Therapy, Honam Univ.)
Publication Information
Korean Journal of Environment and Ecology / v.29, no.4, 2015 , pp. 525-532 More about this Journal
Abstract
In order to determine the testicular cycle of the Asian toad, Bufo gargarizans, adult males of the species were captured around Jeongeup city (Jeollabuk-do, Korea) during March, 2012 to February, 2013 and the gonadosomatic index (GSI) and the changes of germ cells in their testes were investigated throughout the year. The study indicated that the spermatogenesis in the seminiferous tubule of testes began in April and became most active in July. The recorded GSI was the highest and the cross area of seminiferous tubule was the widest in this period. The seminiferous tubules at the post spawning stage appeared in February, the largest amounts occurred in March and primary spermatogonia also appeared in this period. The GSI and the cross area of seminiferous tubules were found to be the lowest in March, indicating a testicular cycle with potentially continuous spermatogenic process. According to the findings above, it is confirmed that testicular spermatogenesis takes place actively between April to July in male Asian toad and that their breeding season is February to March.
Keywords
AMPHIBIA; GONADAL CYCLE; GSI;
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