Paper Information

Journal:   BIOLOGICAL SCIENCES (DANISH-I ZISTI-I IRAN)   WINTER 2009 , Volume 3 , Number 4; Page(s) 15 To 27.
 
Paper: 

AN INTRODUCTION TO THE BIOLOGY OF THE EUPHRATES TURTLE (REFETUS EUPHRATICUS) IN KHUZESTAN PROVINCE, IRAN

 
 
Author(s):  YOUSEFI S.*, IZADIAN M.
 
* DEPARTMENT OF BIOLOGY, VARAMIN BRANCH, ISLAMIC AZAD UNIVERSITY, VARAMIN, IRAN
 
Abstract: 

Euphrates Turtles, Refetus euphraticus, belongs to Trionychidae family. In this research 32 Euphrates Turtles were collected from different habitats in Khuzestan Province during 2007-2008, were studied in terms of their biology and morphometry. In contrary to the other turtles R. euphraticus possesses a soft shell with soft and flexible edges. Their carapaces are round to oval shape and the color in non-adults is olive-green with yellow, beige or white spots. In adults, however, there are either no spots on the shell or there are limited or darker spots. The head is elongated and its tube-shaped snout is short and thick covered by fleshy lobes. The neck is relatively long and flexible. All its front and hind toes are paddled and only 3 of its toes, in both front and hind paws, possess claws. They are carnivorous and lay 4-5 eggs per year. The size of the eggs is average 28.95 mm in diameter. The statistical data indicates no meaningful difference in characteristics and appearance between male and female. Maximum of the relative abundance of the weight (57.5%) was till 5 kg. Maximum of the relative abundance of the carapace's length (24%) was between 30-40 cm. Maximum of the relative abundance of the carapace's width (31%), maximum of the relative abundance of the plastron's length (28%) and maximum of the relative abundance of the plastron's width (21%) were between 25-30 cm.
Maximum of the relative abundance of the tail length1 (from the end of the plastron to the end of the tail) (46%) was between 5-15 cm. Maximum of the relative abundance of the tail length2 (from the end of the plastron to the initial part of the cloak) (19%) was between 10-12.5 cm. In this research sexual ratio (male/female) was 1/0.7.

 
Keyword(s): BIOLOGY, IRAN, MORPHOMETRIC, KHUZESTAN PROVINCE, EUPHRATES TURTLE, REFETUS EUPHRATICUS
 
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