Document Type: Original Article

Authors

1 Department of Biology, Faculty of Biological Sciences, Varamin-Pishva Branch, Islamic Azad University, Varamin, Iran

2 Research group of Biodiversity & Biosafety, Research Center for Environment and Sustainable Development, RCESD, Department of Environment, Tehran, Islamic Republic of Iran

3 Institute of Fisheries Research, Agricultural Research, Education and Promotion Organization, Tehran, PO Box: 6116-14155

4 Department of Plant Protection, Faculty of Agriculture, Varamin-Pishva Branch, Islamic Azad University, Varamin, Iran

Abstract

The Euphrates turtle, Rafetus euphraticus, is one of the least known aquatic species inhabited in northwest of Persian Gulf and Khuzestan province waters. To evaluate the morpho-meterical and biological characteristics of this species, 32 samples were captured from nearby populations of Khuzestan province through Balarood, Sakhiri, Dez, Gargar and Shatit rivers and the lagoons of Shadegan and Hoor-al-Azim of which 14 samples were used for morpho-meterical tests. The measured characteristics were sex determination, carapace curved length and width, plastron length and width, the length of cloaca, the length of tail, total weight, the ratio of plastron length/width, carapace length/width, plastron length/carapace length and cloaca length/plastron length. The maximum weight of the collected specimens was up to 20 kg and the sex ratio (males to females) was 1:0.7. Highly significant correlation was found between sex and some morphometerical characteristics such the ratio of carapace length/width which would be considered as an index in the situation that cloaca observation is impossible. More morphological and ecological studies are needed for better understanding about the species in Iran.

Keywords

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