İ. Ethem ÇEVİK, Uğur KAYA, Uğur C. ERİŞMİŞ

Population status of the Taurus frog, Rana holtzi Werner (1898), in its terra typica: Is there a decline?

Toros Dağlan herpetofaunası çeşitlidir ve çoğu tür lokal olarak boldur. Toros Kurbağası, R. holtzi Toros Dağları'ndaki Maden Gölü'ne endemiktir. Bu türün sınırlı habitatında daha önceleri bol olduğu düşünülmesine rağmen, populasyon büyüklüğü ve buna ait eğilimi belirli değildir. Diğer hayvanlarda olduğu gibi, çoğu anurun geçmiş yıllarda azaldığı veya neslinin tükendiği bilinmektedir. 2003 yılında Toros Kurbağası'nın tip lokalitesinde markala-tekrar yakala çalışması yapılmıştır. Amacımız bu çalışma ile ft holtzînin doğal yaşam ortamında gözlenmesi, populasyon büyüklüğünün hesaplanması ve sayıca azalmanın belirlenmesidir. Elde ettiğimiz sonuçlar bu hayvanların doğal habitatlannda ciddi bir azalma ile karşı karşıya kaldıklarını göstermektedir.

Toros kurbağası, Rana holtzi werner (1898)' in tip lokalitesindeki populasyon durumu: Azalma mı var?

The herpetofauna of the Taurus Mountains is diverse, and many species are locally abundant. The Taurus frog, Rana hoftzi, is endemic to Maden Lake in the Taurus Mountains in Turkey. Although it was thought to be abundant in its restricted habitat, the population size of the Taurus frog and its related trend are uncertain. Like many animals, a great number of anurans have declined or become extinct over the past decades. In 2003, we conducted a mark-recapture study on the Taurus frog population in its terra typica. Our objective was to monitor ft holtzi in its terra typica to estimate its population size and assess the extent of any decline. Our results indicate that this species is facing a very high risk of decline in its natural habitat.

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