Testicular Morphologies of Two Sympatric Podarcis Species

The reproductive strategies of reptiles vary according to many factors. In lizards, intraspecific and interspecific competition, and environmental and seasonal factors affect their reproductive biology. This study aimed to conduct a comparative analysis of testis sizes in the sympatrically coexisting species, Podarcis muralis and Podarcis tauricus, located in Kofçaz, Kırklareli, Turkey, considering both intra-species and inter-species variations. Changes in body sizes and testis sizes according to months were monitored. As a result, it was determined that in both species, there was a positive correlation between body size and testis size, and that in P. tauricus, both body and testis sizes were higher compared to P. muralis, showing a significant difference. It was also observed that in the P. muralis species, the testis size reached its peak value in April (mean daily temperature 9.9°C), while in the P. tauricus species, it reached the highest value in May (mean daily temperature 15.5°C). It was found that the testis size in P. muralis reached its lowest value in August (mean daily temperature 23.8°C), while in P. tauricus, it was lowest in September (mean daily temperature 20.2°C). The fact that testis size is high in different months in these two sympatric species suggests that their active breeding periods differ.