Observations on the spermatogenic cycle of the Caspian Bent-toed Gecko, Cyrtopodion caspium, in Iran (Sauria: Gekkonidae)

Abstract

Spermatogenesis in the Caspian Bent-toed Gecko, Cyrtopodion caspium, was studied in Mazandaran Province, northern Iran. Sampling took place periodically every 15 days during the activity period of this species at night, from 5 April to 20 October 2011. In total, 70 adult males were captured by hand. Testes were removed and processed for histological and morphometric studies. The results show that spermatogenesis begins in early April, reaches its peak in late May and early June, and ends in early to mid August. The maximum level of sperm production occurred in early June. The minimum diameter, weight and volume of testes were observed in early August. Three phases were observed during the activity period for spermatogenesis in C. caspium: active, transitional and inactive phases. Spermatogenesis of C. caspium in Iran is seasonal and alternate.

Keywords:

• Reproductive system
• lizard
• gecko
• testes
• Cyrtopodion caspium
• Iran