Author: (Gholami, Esmaeili, Erpenbeck & Reichenbacher, 2014)
FBname: Shirin tooth-carp
Comments: Inhabits Khosroshirin Stream in the uppermost reaches of the Kor River Basin and its connected springs including Paselari and Pahn springs.  Paselari spring is composed of  muddy substrate with small gravels, and water surface covered by dense filamentous green algae.  The surrounding area is vegetated with reed (<i>Phragmatis</i> sp.), rush (<i>Juncus</i> sp.), shrubs and trees.  Water current is high in Khosroshirin stream while low in Paselari and Pahn springs. The following mean values of physico-chemical paramaters of three stations from Paselari spring were recorded:  nitrates 1.95 mg l-1, nitrites 0.42 mg l-1, phosphates  0.59 mg l-1, ammonia 0.12 mg l-1, dissolved oxygem (DO) 8.92 mg-1, DO% 122.6, total dissolved solids 191.7 mg-1, conductivity 395 μs cm-1, salinity 0.18 0/00, pH 7.9 and water temperature 17.05°C .  Collected together with <i>Acanthobrama persidis</i>, <i>Alburnus mossulensis</i>, <i>Capoeta aculeata</i>, <i>Capoeta saadi</i> (Cyprinidae) and <i>Onchorhynchus mykiss</i> (Salmonidae) from Khosroshirin Stream.  Threatened mainly by the carnivorous exotic <i>O. mykiss</i> (Ref. 94548).