Abstract
In their natural habitats, the Chub (Alburnoides bipunctatus) with 38.1% and the Carp (Cyprinus carpio) with 34.8% comprise the major food items of the European Otter in Iran, whereas in fish farms carps dominate with 71.3%. It is estimated that 1–3 Otters are killed annually in each fish farm in Iran. The Otter needs full protection due to the high mortality caused by fish farmers around the country. Illegal shooting, habitat degradation and river pollution have been recognised as the major factors which adversely affect the Otter population. The cranial measurements of 21 specimens are given. CBL for males and females were 118.4 mm and 111.6 mm on average, respectively. No differences could be found when compared with published results from European countries.
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