Apreliminary study of the food of the dwarf snake Eirenis modestus (Martin, 1838) (Serpentes: Colubridae), in Izmir and Manisa Provinces

Bu çalışmada, İzmir ve Manisa illerinde yapılan arazi çalışmaları esnasında yakalanan 14 (4 dd, 499 ve 6juv.) Eirenis modestus örneğinin sindirim sistemi içeriği incelenmiş, toplam 44 av tespit edilmiştir. Sindirim sistemi içeriğine göre, türün besinini insecta (% 75), Chilopoda (% 11) ve Reptilia (% 2) sınıflarına ait avlar oluşturmaktadır ve geriye kalan avlar tanımlanamamıştır. Bulunma oranı bakımından Coleoptera (% 32) ve Orthoptera (% 21); görülme sıklığı bakımından Coleoptera (% 36), Orthoptera (% 36) ve Scolopendromorpha (% 29); hacim bakımından Scolopendromorpha (% 72) takımları en yüksek orana sahip av gruplarıdır. Bu sonuçlara göre, Eirenis modestus büyük oranda taş altı eklembacaklı faunası (% 86) ile beslenmektedir.

Izmir ve Manisa ili uysal yılan, Eirenis modestus (Martin, 1838) (Serpentes: Colubridae), 'ın besini üzerine bir ön çalışma

Abstract: The stomach contents of 14 (4 do", 499 and 6 juveniles) Eirenis rnodestus specimens captured during various field studies in İzmir and Manisa provinces were examined, and a total of 44 prey items were found. An analysis of the stomach contents revealed that prey belonging to the classes Insecta (75%), Chilopoda (11%), and Reptilia (2%) constituted the diet of the species; the remaining prey could not be identified. The most frequently consumed prey were the orders Coleoptera (32%) and Orthoptera (21%) by number; Coleoptera (36%), Orthoptera (36%), and Scolopendromorpha (29%) by frequency; and Scolopendromorpha (72%) by volume. Based on these results, Eirenis modestus feeds predominantly on arthropods found under stones (86%).

___

  • Agrimi, U. and Luiselli, L. 1992. Feeding strategies of the viper Vipera ursinii (Reptilia: Viperidae) in Apennines. Herpetological Journal 2: 37-42
  • Akani, G.C., Eniand, E.A., Ekpo, İ.J., Angelici, F.M. and Luiselli, L. 2003. Food habits of the snake, Psammophis phillipsi from the continuous rainforest region of Southern Nigeria (West Africa). Journal of Herpetology 37: 208-211.
  • Bannikov, A.G., Darevsky, I.S., Ishchenko, V.G... Rustamov, A.K. and Shcherbak, N.N. 1977. Ophredelitel zemnovodnykh i presmykayushchikhysya fauny SSSR [A Guide to the Amphibians and Reptiles of the U.S.S.R.], Prosveshchenie Publ., Moscow.
  • Baran, İ. 1976. Türkiyeyılanlarının taksonomik revizyonu ve coğrafik yayılışları, TÜBİTAK Yayınları, No.309, TBAG Seri No 9, Ankara.
  • Başoğlu, M. and Baran, i. 1977. Türkiye sürüngenleri, kısım. 11. yılanlar, E.Ü. Basımevi, Bornova, İzmir.
  • Cobb, V.A. 2004. Diet and prey size of the Flathead Snake, Tantilla gracilis. Copeia 2004: 397-402.
  • Dunham, A.E. 1983. Realized niche overlap, resource abundance, and intensity of interspecific competition. In: Lizard ecology: Studies of a model organism (eds. R..B. Huey,. E.R. Pianka and T.W. Schoener), Harvard Univ. Press, Cambridge, MA, pp. 261-280.
  • Galan, P. 1988. Segregation ecolögica en una comunidad de ofidios. Donana, Açta Vertebr. 15: 59-78.
  • Galan P. 1997. Culebra lisa meridional. In: Fauna Iberica, vol. 10: reptiles (eds. M. A. Ramos et al.), Museo Nacional de Ciencias Naturales, CS1C, Madrid, pp. 375-383.
  • Greene, H.W. 1997. Snakes: the evolution of mystery in nature, Univ. of California Press, Berkeley.
  • Gregory, P.T. and Isaac, L.A. 2004. Food habits of the Grass Snake in Southeastern England: In Natrix natrix a generalist predator? Journal of Herpetology 38: 88-95.
  • Hamilton Jr., WJ. and Pollack, J.A., 1956. The food of some colubrid snakes from Fort Benning, Georgia. Ecology 37: 519-526.
  • Luiselli, L. 2006a. Resource partitioning and interspecific competition in snakes: the search for general geographical and guild patterns. Oikos 114: 193-211.
  • Luiselli, L. 2006b. Broad geographic, taxonomic and ecological patterns of interpopulation variation in the dietary habits of snakes. Web Ecology 6: 2-16.
  • Luiselli, L, Pleguezuelos, J.M., Capula, M. and Villafranca, C. 2001. Geographic variations in the diet composition of a secretive Mediterranean snake: Coronella girondica from Spain and Italy. Italian Journal of Zoology 68: 57-60.
  • Mushinsky, H.R. 1987. Foraging ecology. In: Snakes: Ecology and evolutionary biology (eds. R.A. Seigel, J.T. Collins and S.S. Novak), MacMillan, New York, pp. 302-334.
  • Rodriguez-Robles, J.A. 2002. Feeding ecology of North American Gopher Snakes (Pituophis catenifer, Colubridae). Biological Journal of the Linnean Society 77: 165-183.
  • Rodriguez-Robles, J.A., Bell, C.J. and Grene, H.W. 1999. Food habits of the glossy snake, Arizona elegans, with comparisons to the diet of sympatric long-nosed snakes, Rhinocheilus lecontei. Journal of Herpetology 33: 87-92.
  • Shewchuk, C.H. and Austin, J.D. 2001. Food habits of the racer (Coluber constrictor mormon) in the northern part of its range. Herpetological Journal 11: 151-155.
  • Shine, R. 1977. Habitats, diets and sympatry in snakes: a study from Australia. Canadian Journal of Zoology 55: 1118-1128.
  • Terentjev, P.V. and Chernov, S.A. 1949. Ophredelitel zemnovodnykh i presmykayushchikhysya SSSR [Guide to amphibians and reptiles of USSR], Uchpedgiz Publ., Moskow.