Short communication: Age and growth of king nase, Condrostoma regium (Cyprinidae), from Bibi-Sayyedan River of Semirom, Isfahan, Iran

Age determination is an important step in fisheries management (Polat et al., 1999). The cyprinid fish Chondrostoma regium (Heckel, 1843) is widely distributed in Tigris-Euphrates basin and the Mediterranean basins of southeastern Turkey and the northern Levant (Suiçmez et al., 2011). In Iran, it is found in Karun and Karkheh Rivers, the Hoor-al-Azim Marsh and also in Zayandehrud River and Bushehr basin (Ghorbani Chafi, 2000; Keivany et al., 2015a). This species is not found in other basins of Iran (Esmaeili et al., 2014a). However, there is little information about its habitat requirements. Length-Weight relationship and condition factor of C.