Euphrates Trout

biology_ecology

Habitat. Headwater streams with cold, clear water, moderate current, gravelly and pebbly bottom. Biology. No data.

Handbook of Freshwater Fishes of West Asia

diagnosis

Diagnosis. Distinguished from other species of Salmo in Euphrates and Tigris drainages by: ○ flank brownish in life / ○ one black spot behind eye / ○ 2 – 9 black spots on opercle / ○ 0 – 54 roundish black spots on flank, restricted to back (usually missing in predorsal area) and upper part of flanks / ○ number of black spots not increasing with size / ○ 13 – 53 small red spots on flank, round in male and irregularly shaped in female / ○ adipose dark-grey / ● mouth gape length 14.3 – 16.5 % SL in male, 12.3 – 14.9 in female / ○ adipose large, with 0 – 4 orange spots on its posterior margin / ○ 10 – 12 parr marks, distinct up to about 200 mm SL / ○ 112 – 120 lateral-line scales counted until end of hypural complex / ● 26 – 31 scale rows between lateral line and dorsal origin. Size up to 260 mm SL.

Handbook of Freshwater Fishes of West Asia

discussion

Remarks. Genomic data suggest that natural hybridisation between Mediterranean and Black Sea trout has played a role in the evolution of S. euphrataeus. However, the diversity, biogeography and relationships of the Persian Gulf trout still need to be better understood.

Handbook of Freshwater Fishes of West Asia

distribution

Distribution. Türkiye: Şenyurt, Erzincan, Kuzgun, Rizekent, Ağırcık, Sırlı (Karasu drainage) in northern Euphrates.

Handbook of Freshwater Fishes of West Asia