In this study, the freshwater fish diversity of the Nilufer stream basin is investigated. Nine families, 16 genera, and 19 fish species were recorded. The most representative families are Leuciscidae with five species (27.7 %), followed by Cyprinidae with five species (27.7 %). Overall, 17 sampling localities were studied among 2014-2015 to inventory fish species in the area. No fish was found at five stations representing the middle and downstream parts of the Nilufer stream. The most common species were detected, Barbus niluferensis, Squalius cii, Oxynoemacheilus angorae, and Oxynoemacheilus simavicus, respectively.
Salmo duhani, sp. n., a new species, is described from the southern Marmara Sea drainages, Turkey. It differs from the other Salmo species in the neighboring basins by having a shorter maxillary (8-10% SL); a shorter head (24-28% SL); 115-121 lateral line scales; 26-29 scale rows between lateral line and dorsal-fin origin; 20-23 scale rows between lateral line and anal-fin origin; 15-17 scales between lateral line and adipose-fin insertion; 17-19 gill rakers on the outer side of first gill arch; 10-13 large and oblong parr marks along the lateral line in all individuals.
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