A Study on Age Determination and Life Cycle of Pelophylax ridibundus (Pallas, 1771) by Skeletochronology Method

Year 2024, Volume: 7 Issue: 5, 1999 - 2009, 10.12.2024

Ahmet Alkaya , Hülya Şereflişan

Abstract

In this study, age determination of male and female adult Pelophylax ridibundus individuals captured from around the Gölbaşı Lake. Tailless frogs of age was defined by the skeletal chronology method. The fourth toes of the hind legs were used in this method. Age was determined counted on the Resting Lines (RL) of the phalanges. The mean ages of frogs were female 3.72 ± 0.97 years (range 2-7) and male 3.77±0.87 years (range 3-6) respectively. There was no significant difference between the ages of female and male frogs (P>0.05). The mean weights of female and male frogs were found to be 62.9±18.57 g and 42.77±10.74 g, respectively. This difference among the weights was significant (P<0.05). The mean snout- vent length (SVL) value was measured as 74.71±11.91 mm for females and 71.7±7.25 mm for males. There was no significant difference in SVL among both sexes (P>0.05). In addition, it was defined a significant correlation among the SVL of female (r=0.889, P<0.01, N=36) and male frogs (r=0.833, P<0.01, N=18) age. As a result of the study, it was seen that the frogs have a young population structure.

Keywords

Age determination, Edible frog, Pelophylax ridibundus, Skeletochronology, Gölbaşı lake

Pelophylax ridibundus'un (Pallas, 1771) İskeletkronoloji Yöntemiyle Yaş Tespiti ve Yaşam Döngüsü Üzerine Bir Araştırma

Abstract

Bu çalışmada, Gölbaşı Gölü çevresinden yakalanan yetişkin erkek ve dişi Pelophylax ridibundus bireylerinin yaşlarının belirlenmesi amaçlanmıştır. Kuyruksuz kurbağaların yaşı iskelet kronolojisi yöntemine göre belirlenmiştir. Bu yöntemde, kurbağaların arka bacaklarının dördüncü ayak parmakları kullanılmaktadır. Yaş, falanjlardaki Dinlenme Halkaları (RL) üzerinden sayılarak belirlenmiştir. Kurbağaların ortalama yaşları sırasıyla dişi 3.72 ± 0.97 yıl (2-7 aralığı) ve erkek 3.77±0.87 yıl (3-6 aralığı) bulunmuştur. Dişi ve erkek kurbağaların yaşları arasında anlamlı bir fark görülmemiştir (P>0.05). Dişi ve erkek kurbağaların ortalama ağırlıkları sırasıyla 62.9±18.57 g ve 42.77±10.74 g olarak bulunmuştur. Ağırlıklar arasındaki bu fark anlamlıdır (P<0,05). Burun deliği-Kloak arası uzunluğu (SVL) ortalama değeri dişilerde 74.71±11.91 mm, erkeklerde ise 71.7±7.25 mm olarak ölçülmüştür. Her iki cinsiyet arasında SVL açısından anlamlı bir fark yoktur (P>0.05). Ayrıca, dişi (r=0.889, P<0.01, N=36) ve erkek kurbağaların (r=0.833, P<0.01, N=18) yaşları ile SVL arasında anlamlı bir korelasyon olduğu belirlenmiştir. Çalışma sonucunda, kurbağaların genç bir nüfus yapısına sahip olduğu görülmüştür.

Keywords

Yaş tespiti, Yenilebilir kurbağa, Pelophylax ridibundus, İskelet kronolojisi, Gölbaşı gölü

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