Detection Probability and Habitat Selection of the Beyşehir Frog, Pelophylax caralitanus (Arikan 1988), in Southwestern Anatolia, Turkey

Eyup Başkale, Didem Çapar


This study provides the detection probabilities and habitat selection of the Beyşehir frog Pelophylax caralitanus in the Lake District region of Turkey. We collected ecological data from a total 67 sites including water chemistry variables and regional landscape variables that have considerable effects on amphibian distributions. The proportion of site occupied by the Beyşehir frog was 0.507, which is equivalent to almost half of the studied sites. The average detection probability was calculated as 0.48 ± 0.102 over the year, whereas it was calculated as 0.75 ± 0.090 during the breeding season. Temperature was positively correlated with detection probability. Maximum water depth, forest edge presence within 30 m of the water body, canopy presence surrounding the water body, submerged vegetation presence, vegetation cover rate of the water body, pH, dissolved O2, chloride, and Mg hardness were statistically different in sites where the Beyşehir frog is present and absent. Among the regional landscape variables potentially affecting the presence of the species, Logistic Regression Analysis showed positive relationships with canopy presence surrounding the water body and forest edge presence within 30 m of habitats. pH, in turn, was negatively related to the presence of P. caralitanus as an explanatory variable of water chemistry.


detection probability; habitat preference; ecology; water chemistry; explanatory variables

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Akın Ç., Bilgin M., and Bilgin C. C. (2010), «Discordance between ventral colour and mtDNA haplotype in the water frog Rana (ridibunda) caralitana, 1988 Arıkan», Amphibia–Reptilia, 31, 9 – 20.

Alford R. A. and Richards S. J. (1999), «Global amphibian declines: a problem in applied ecology», Annu. Rev. Ecol. Evol., 30, 133 – 165.

Arıkan H. (1988), «On a new form Rana ridibunda (Anura: Ranidae) from Turkey», İstanbul Univ. Fen Fak. Mec., 53, 81 – 87.

Arıkan H., Özeti N., Çevik I. E., and Tosunoğlu M. (1994), «Distribution of Rana ridibunda caralitana (Anura: Ranidae) in Lake District», Turk. J. Zool., 18, 141 – 145.

Ayaz D., Tok C. V., Mermer A., Tosunoğlu M., Afsar M., and Çiçek K. (2007), «Population size of the marsh frog (Rana ridibunda Pallas, 1771) in Lake Yayla (Denizli, Turkey)», Turk. J. Zool., 31, 255 – 260.

Bailey N. T. J. (1951), «On estimating the size of mobile populations from recapture data», Biometrika, 38, 293 – 306.

Bain M. B. and Stevenson N. J. (1999), Aquatic Habitat Assessment: Common Methods, American Fisheries Soc., Maryland.

Barinaga M. (1990), «Where have all the froggies gone?» Science, 247, 1033 – 1034.

Başkale E. (2009), Ege Bölgesindeki Bazı Göllerde Yaşayan Amfibi Türlerine ait Populasyonların Gözlenmesi, Populasyon Büyüklüklerinin Hesaplanması ve Habitat Özelliklerinin Belirlenmesi. Doktora Tezi [Monitoring of Amphibian Species, Estimation of Population Sizes and Determination of Habitat Characteristics on Some Lakes in Aegean Region. Ph. D. thesis ], Fen Bilimleri Enstitüsü, Ege Üniversitesi [in Turkish].

Başkale E. and Kaya U. (2009), «Richness and distribution of amphibian species in relation to ecological variables in Western Aegean Region of Turkey», Ekoloji, 18, 25 – 31.

Blankenhom H. J. (1972), «Meteorological variables affecting onset and duration of calling in Hyla arborea L. and Bufo calamita calamita Laur», Oecologia, 9, 223 – 234.

Blaustein A. R. (1994), «Amphibians in a bad light», Nat. Hist., 103, 32 – 39.

Blaustein A. R. and Wake D. B. (1990), «Declining amphibian populations: a global phenomenon», Trends. Ecol. Evol., 5, 203 – 204

Blaustein A. R. and Wake D. B. (1995), «The puzzle of declining amphibian populations», Sci. American, 272, 52 – 57

Blaustein A. R., Romansic J. M., Kiesecker J. M., and Hatch A. C. (2003), «Ultraviolet radiation, toxic chemicals and amphibian population declines», Divers. Distrib., 9, 123 – 40.

Bodenheimer F. S. (1944), «Introduction to the knowledge of the Amphibia and Reptilia of Turkey», Rev. Fac. Sci. Univ. İstanbul, 9, 1 – 83.

Carey C. and Bryant C. J. (1995), «Possible interrelations among environmental toxicants, amphibian development, and decline of amphibian populations», Environ. Health Perspect., 103, 13 – 17.

Carisio L., Sacchi R., Seglie D., and Sindaco R. (2014), «Habitat selection in a fossorial toad Pelobates fuscus insubricus (Amphibia: Pelobatidae): does the soil affect species occurrence?» Acta Herpetol., 9, 51 – 59.

Carpenter S. R., Caraco N. F., Correll D. L., Howarth R. W., Sharpley A. N., and Smith V. H. (1998), «Nonpoint pollution of surface waters with phosphorus and nitrogen», Ecol. Appl., 8, 559 – 568.

Cassidy B. S. (2006), One Frog, Two Fish, Red Leg, Few Fish: Stress in the Aquatic Animal’s Ecosystem, Animal Lab News Jan/Feb online Viacon Publishing, Inc.

Christy M. T. and Dickman C. R. (2002), «Effects of salinity on tadpoles of the green and golden bell frog (Litoria aurea)», Amphibia–Reptilia, 23, 1 – 11.

Collins J. P. and Wilbur H. M. (1979), «Breeding habits and habitats of the amphibians of the Edwin S. George Reserve, Michigan, with notes on the local distribution of fishes», Occas. Pap. Mus. Zool. Univ. Mich., 686, 1 – 34.

Cree A. (1989), «Relationship between environmental conditions and nocturnal activity of the terrestrial frog, Leiopelma archeyi», J. Herpetol., 23, 61 – 68.

Dodd C. K., Jr., and Cade B. S. (1998), «Movement patterns and the conservation of amphibians breeding in small, temporary wetlands», Conserv. Biol., 12, 331 – 339.

Evans M., Yaber C., and Hero J. M. (1996), «Factors influencing choice of breeding site by Bufo marinus in its natural habitat», Copeia, 1996, 904 – 912.

Duellman W. E. and Trueb L. (1994), Biology of Amphibians, The John Hopkins Press Ltd., London.

Düşen S., Öz M., Tunç M. R., Kumlutaş Y., and Durmuş H. (2004), «Three new localities for Rana bedriagae caralitana Arıkan, 1988 (Anura: Ranidae) in the West Mediterranean Region», Turk. J. Zool., 28, 114 – 117.

Egea-Serrano A., Oliva-Paterna F. J., and Torralva M. (2006), «Breeding habitat selection of Salamandra salamandra (Linnaeus, 1758) in the most arid zone of its European distribution range: application to conservation management», Hydrobiologia, 560, 363 – 371.

Eingenbrod F., Hecnar S. J., and Fahrig L. (2008), «Accessible habitat: an improved measure of the effects of habitat loss and roads on wildlife populations», Landscape Ecol., 23, 159 – 168.

Ensbella F., Loriga S., Formichetti P., Isotti R., and Sorace A. (2003), «Breeding site selection of Bufo viridis in the city of Rome (Italy)», Amphibia–Reptilia, 24, 396 – 400.

Fenn M. E., Baron J. S., Allen E. B., Rueth H. M., Nydick K. R., Geiser L., Bowman W. D., Sickman J. O., Meixner T., Johnson D. W., and Neitlich P. (2003), «Ecological effects of nitrogen deposition in the western United States», BioScience, 53, 404 – 420.

Frukuyama K. and Kusano T. (1992), «Factors affecting breeding activity in a stream-breeding frog, Buergeria buergeri», J. Herpetol., 26, 88 – 91.

Gagné S. A. and Fahrig L. (2007), «Effect of landscape context on anuran communities in breeding ponds in the National Capital Region, Canada», Landscape Ecol., 22, 205 – 215.

Gardner T. (2001), «Declining amphibian populations: a global phenomenon in conservation biology», Anim. Biodivers. Conserv., 24, 25 – 44.

Gascon C. (1991), «Population and community-level analyses of species occurrences of central amazonian rainforest tadpoles», Ecology, 72, 1731 – 1746.

Graeter G. J., Rothermel B. B., and Gibbons J. W. (2008), «Habitat selection and movement of pond-breeding amphibians in experimentally fragmented pine forests», J. Wild Manag., 72, 473 – 482.

Hecnar S. J. (1995), «Acute and chronic toxicity of ammonium nitrate fertilizer to amphibians from southern Ontario», Environ. Toxicol. Chem., 14, 2131 – 2137.

Hecnar S. J. and McCloskey R. T. (1996), «Regional dynamics and the status of amphibians», Ecology, 77, 2091 – 2097.

Hecnar S. J. and McCloskey R. T. (1998), «Species richness patterns of amphibians in southwestern Ontario ponds», J. Biogeogr., 25, 763 – 772.

Horne M. T. and Dunson W. A. (1995), «Effects of low pH, metals and water hardness on larval amphibians», Arch. Environ. Contam. Toxicol., 29, 500 – 505.

Jdeidi T. (2000), Enzyme Polymorphism, Morphometric, and Bioacoustic Studies in the Water Frog (Rana ridibunda) Complex in Turkey. Ph.D. Thesis, Middle East Technical University, Ankara, Turkey.

Jdeidi T., Bilgin C. C., and Kence M. (2001), «New localities extend the range of Rana bedriagae caralitana Arikan, 1988 (Anura: Ranidae) further west and suggest species status», Turk. J. Zool., 25, 153 – 158.

Johansson M., Räsänen K., and Merilä J. (2000), «Comparison of nitrate tolerance between different populations of the common frog, Rana temporaria», Aquat. Toxicol., 54, 1 – 14.

Kaya U., Çevik İ. E., and Erişmiş U. C. (2002), «New distributional records for Rana bedriagae caralitana in Anatolia», Turk. J. Zool., 26, 381 – 383.

Krebs C. J. (1972), Ecology. The Experimental Analysis of Distribution and Abundance, Harper and Row, New York.

Krebs C. J. (1989), Ecological Methodology, Harper Collins Publishers Inc., New York.

Lips K. R., Reaser J. K., Young B. E., and Ibáñez R. (2001), «Amphibian monitoring in Latin America: a protocol manual», Herpetol. Circ., 30, 1 – 116.

Loman J. and Lardner B. (2006), «Does pond quality limit frogs Rana arvalis and Rana temporaria in agricultural landscapes? A field experiment», J. Appl. Ecol., 43, 690 – 700.

MacKenzie D. I. and Royle J. A. (2005), «Designing efficient occupancy studies: general advice and tips on allocation of survey effort», J. Appl. Ecol., 42, 1105 – 1114.

MacKenzie, D. I., Nichols J. D., Lachman G. B., Droege S., Royle J. A., and Langtimm C. A. (2002), «Estimating occupancy rates when detection probabilities are less than one», Ecology, 83, 2248 – 2255.

Manenti R., Ficetola G. F., and De Bernardi F. (2009), «Water stream morphology and landscape: complex habitat determinants for the fire salamander Salamandra salamandra», Amphibia–Reptilia, 30, 7 – 15.

Marco A., Quilchano C., and Blaustein A. R. (1999), «Sensitivity to nitrate and nitrite in pond-breeding amphibians from the Pacific Northwest, USA», Environ. Toxicol. Chem., 18, 2836 – 2839.

McDiarmid R. W., Heyer W. R., Donnelly M. A., McDiarmid R. W., Hayek L. C., and Foster M. S. (1994), Measuring and Monitoring Biological Diversity: Standard methods for Amphibians, Smithsonian Inst. Press, Washington, D.C.

Pavignano I., Giacoma C., and Castellano S. (1990), «A multivariate analysis of amphibian habitat determinants in north western Italy», Amphibia–Reptilia, 11, 311 – 324.

Pellet J. and Schmidt B. (2005), «Monitoring distributions using call surveys: estimating site occupancy, detection probabilities and inferring absence», Biol. Conserv., 123, 27 – 35.

Pellet J., Hoehn S., and Perrin N. (2004), «Multiscale determinants of tree frog (Hyla arborea L.) calling ponds in western Switzerland», Biodivers. Conserv., 13, 2227 – 2235.

Pellet. J., Helfer V., and Yannic G. (2007), «Estimating population size in the European tree frog (Hyla arborea) using individual recognition and chorus counts», Amphibia–Reptilia, 28, 287 – 294.

Peltzer P. M. and Lajmanovich R. C. (2004), «Anuran tadpole assemblages in riparian areas of Paraná River (Argentina)», Biodivers. Conserv., 13, 1833 – 1842.

Phillips K. (1990), «Frogs in trouble», Int. Wildlife, 20, 4 – 11.

Plötner J. and Ohst T. (2001), «New hypotheses on the systematics of the western Palearctic water frog complex (Anura, Ranidae)», Zool. Reihe, 77, 5 – 21.

Rohr J. R., Elskus A. A., Shepherd B. S., Crowley P. H., McCarthy T. M., Niedzwiecki J. H., Sager T., Sih A., and Palmera B. D. (2003), «Multiple stressors and salamanders: effects of an herbicide, food limitation and hydroperiod», Ecol. Appl., 14, 1028 – 1040.

Sanzo D. and Hecnar S. J. (2006), «Effects of road de-icing salt (NaCl) on larval wood frogs (Rana sylvatica)», Environ. Pollut., 140, 247 – 256.

Sayım F., Başkale E., Tarkhnishvili D., and Kaya U. (2009), «Some water chemistry parameters of breeding habitats of the Caucasian salamander, Mertensiella caucasica in the Western Lesser Caucasus», C. R. Biol., 332, 464 – 69.

Scott J. M., Heglund P. J., Samson F., Haufler J., Morrison M., Raphael M., and Wall B. (2002), Predicting Species Occurrences: Issues of Accuracy and Scale, Island Press, Covello, CA, USA.

Skei J. K., Dolmen D. L., Rønning L., and Ringsby T. R. (2006), «Habitat use during the aquatic phase of the newts Triturus vulgaris (L.) and T. cristatus (Laurenti) in central Norway: proposition for a conservation and monitoring area», Amphibia–Reptilia, 27, 309 – 327.

Spieler M. and Linsenmair K. E. (1997), «Choice of optimal oviposition sites by Hoplobatrachus occipitalis (Anura: Ranidae) in an unpredictable and patchy environment», Oecologia, 109, 184 – 199.

Semlitsch R. D. (1998), «Biological determination of terrestrial buffer zones for pond breeding salamanders», Conserv. Biol., 12, 1113 – 1119.

Semlitsch R. D., Scott D. E., Pechmann J. H. K., and Gibbons J. W. (1996), «Structure and dynamics of an amphibian community», in: M. L. Cody and J. A. Smallwood (eds.), Long-Term Studies of Vertebrate Communities, Acad. Press, San Diego, pp. 217 – 250.

Smith L. L., Barichivich W. J., Staiger J. S., Smith K. G., and Dodd C. K., Jr. (2006), «Detection probabilities and site occupancy estimates for amphibians at Okefenokee National Wildlife Refuge», Am. Midl. Nat., 155, 149 – 161.

Stebbins R. C. and Cohen N. W. (1995), A Natural History of Amphibians, Princeton Univ. Press, Princeton, NJ.

Vos C. C. and Stumpel A. H. P. (1996), «Comparison of habitat-isolation parameters in relation to fragmented distribution patterns in the tree frog (Hyla arborea)», Landscape Ecol., 11, 203 – 214.

Welsh H. H. and Ollivier L. M. (1998), «Stream amphibians as indicators of ecosystem stress: a case study from California’s redwoods», Ecol. Appl., 8, 1118 – 1132.

Werner E. E. and Glennemeier K. S. (1999), «Influence of forest canopy cover on the breeding pond distributions of several amphibian species», Copeia, 1999, 1 – 12.

Werner E. E., Skelly D. K., Relyea R. A., and Yurewicz K. L. (2007), «Amphibian species richness across environmental gradients», Oikos, 116, 1697 – 1712.



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