Aspect of Population Structure of the European Pond Turtle (Emys orbicularis) in Lake Yayla, Western Anatolia, Turkey

Ayaz, Dinçer; Fritz, Uwe; Atatür, Mehmet K.; Mermer, Ahmet; Çiçek, Kerim; Afsar, Murat

doi:10.1670/07-096.1

Cited by 9 publications

(5 citation statements)

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“…For example, freshwater turtles have been captured and recaptured less frequently (Mazzotti, 1995;Auer and Taşkavak, 2004: 11.6-19.7%;Ayaz et al, 2007: 14.1%), than in our (28.6%) and other studies (e.g., Mosimann and Cadi, 2004: 177.7% Ayaz et al, 2008: 29%; Güçlü and Türkozan, 2010: 27.5%). This pattern is likely due to the different methods employed, ranging from few (Mazzotti, 1995;Bayrakci et al, 2016) to multiple sampling occasions (Mazzotti et al, 2007;Olivier et al, 2010;Bayrakci and Ayaz, 2014;present research), depending on the sampling area -from very small to much large areas (present research; Ayaz et al, 2008) -and, finally, to population abundance. This pattern, however, is not easy to determine without a continuous sampling effort, an approach that to date is not standardized.…”

Section: Discussionmentioning

confidence: 72%

“…Reported densities varied widely among several Mediterranean and non-Mediterranean regions. We did not find any evidence of a trend linking any geographical cline or model: density estimates were low in one Mediterranean coastal population (Mazzotti, 1995: 7.2 turtles/ha;Mazzotti et al, 2007: 2.33 to 10.09 turtles/ha) and in an Anatolian population (Auer and Taşkavak, 2004: 2250/km 2 that is 22.5 turtles/ha); intermediate, in Switzerland (Mosimann and Cadi, 2004: 64 turtles/ha) and in certain central Anatolian populations (Ayaz et al, 2007: 83 turtles/ha;Ayaz et al, 2008: 81 turtles/ha), but higher in Hungary (Bayrakci and Ayaz, 2014: 128-242 turtles/ha), and in our Italian population (present research: 146.7 to 183.6 turtles/ha). Our studied populations were, however, characterized by similar densities to those living in Anatolia and in the Black Sea region or those of Emys trinacris of western Sicily (about 240 turtles/ha; Ottonello et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…In Hungary (Balázs andGyörffy, 2006 cited in Bayrakci andAyaz, 2014) the estimated population density ranged from 128 to 242 individuals/ha at Feketevíz (Tisza river). In Turkish populations, densities varied widely from 22.5 to 242 individuals/ha (Auer and Taşkavak, 2004;Ayaz et al, 2007Ayaz et al, , 2008Ayaz and Çiçek, 2011;Bayrakci and Ayaz, 2014). Reported densities varied widely among several Mediterranean and non-Mediterranean regions.…”

Section: Discussionmentioning

confidence: 99%

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Population size and density in two European pond turtle populations of central Italy

et al. 2020

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Two populations of the European pond turtle were studied employing capture, marking and recapture (CMR) techniques to determine population density and abundance in natural and protected areas within the Regional Natural park Migliarino San Rossore Massaciuccoli in north western Tuscany, Italy. The results indicated strong sexual size dimorphism in both populations, with males smaller than females. In one area Emys orbicularis was in general smaller in size with a very low reproductive rate (three out of 25 adult females were gravid), which contrasted with a second population where 20 out of 42 females were gravid. Population estimates indicated 79 turtles were present in the first area (0.34 ha) and 61 turtles in the second area (0.58 ha), giving an overall density estimate of 183.6 turtles/ha and 146.7 turtles/ha respectively. Whilst our results are similar to those found in other areas of Europe, they diverge from other regions, suggesting that sampling and monitoring techniques should be standardized to obtain comparable data that will enable conservation and protection measures to be recommended.

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Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Population size and density in two European pond turtle populations of central Italy

et al. 2020

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“…Eight years later, the same population was calculated at 6346 individuals (5595-7199), with a capture probability and survival rate of 0.24 and 0.72, respectively. Another population of P. ridibundus group was estimated at 14 733 individuals with a femalebiased sex ratio (0.56) in Lake Yayla (Buldan, Denizli) (Ayaz et al, 2007). The density of Caucasian populations of water frogs (P. ridibundus group) was found to vary between a few and several thousand individuals (Gokhelashvili Tarknishivili, 1994).…”

Section: Population Structure and Dynamicsmentioning

confidence: 99%

“…In Uludağ (Bursa), the population of R. macrocnemis consisted of 14% juveniles, 47% males, and 39% females, and a male-biased sex ratio was generally observed (Çiçek, 2009; Çiçek et al, 2011a). According to numerous studies on Ranids, sex ratios can be balanced, male-biased, or female-biased (Combes, 1968;Vences et al, 1999;Kaya EriŞmiŞ, 2001;Ayaz et al, 2007;Çiçek et al, 2011a;İsmail Çiçek, 2017).…”

Section: Population Structure and Dynamicsmentioning

confidence: 99%

Population dynamics of amphibian community in Lake Çıldır, Northeastern Anatolia

Cumhuriyet,

Çiçek

2023

bah

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Knowledge on life history traits and population dynamics of amphibians from northeastern Anatolia is limited. This results in a heavy reliance on published data regarding the European and Caucasian counterparts of the Anatolian populations in local conservation studies. The present study evaluated the phenology, age structure, population size, and population structure of the amphibian community in Lake Çıldır, northeastern Anatolia, Turkey. The site was surveyed between April 2017 and July 2019, detecting the presence of Bufo verrucosissimus, Bufotes viridis sitibundus, Pelophylax ridibundus, and Rana macrocnemis. The estimated population size ranged from 553 to 789 individuals for P. ridibundus and from 404 to 655 individuals for R. macrocnemis. The estimated mean capture probability was 0.09-0.10 for P. ridibundus and 0.08-0.11 for R. macrocnemis. The mean survival rates were estimated at 0.40-0.60 for P. ridibundus and 0.24-0.56 for R. macrocnemis. A male-biased sex ratio was observed for all species. The mean age was estimated at 5.28 years (2-9) for P. ridibundus, 4.32 years (2-6) for R. macrocnemis, and 5.55 years (3-9) for B. viridis sitibundus. Depending on weather conditions, the amphibian species emerged from brumation in the second half of April, and the breeding period took place between the end of April and June. The metamorphosis was attained in 55-125 days for P. ridibundus, 44-124 days for R. macrocnemis, and 56-128 days for B. viridis sitibundus, depending on weather conditions. The amphibian community of Lake Çıldır comprises healthy frog and toad populations, whose primary threats appear to be weather fluctuations and climate change. In contrast to their western Anatolian conspecifics, the studied amphibians suffered limited habitat loss and degradation, rendering them effective candidates as indicator species for climate change studies.

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Spatio-Temporal Dynamics of a Semi-Aquatic Reptile Community in Caspian Reed Bed Ecosystems

Luiselli

Vittorio

Battisti³

et al. 2020

Wetlands

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Aspect of Population Structure of the European Pond Turtle (Emys orbicularis) in Lake Yayla, Western Anatolia, Turkey

Cited by 9 publications

References 2 publications

Population size and density in two European pond turtle populations of central Italy

Population size and density in two European pond turtle populations of central Italy

Population dynamics of amphibian community in Lake Çıldır, Northeastern Anatolia

Spatio-Temporal Dynamics of a Semi-Aquatic Reptile Community in Caspian Reed Bed Ecosystems

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