First Record of Topmouth Gudgeon Pseudorasbora parva (Temminck and Schlegel, 1846) in the Sureyyabey Dam Lake, Yesilirmak Basin, Turkey

The aim of this study is to determine certain morphometric characteristics of Pseudorasbora parva from Süreyyabey Dam Lake. Morphological analyses of thirty two morphometric characters were performed. These characteristics were standard length, fork length, total length, body weight, head length, pre orbital distance, eye diameter, postorbital distance, head depth, pre dorsal distance, prepelvic distance, pre anal distance, pectoral fin- pelvic fin distance, pelvic fin-anal fin distance, body depth, dorsal fin (anterior end) – anal fin distance, dorsal fin (posterior end) – anal fin distance, post dorsal distance, post anal distance, caudal peduncle length (dorsal), caudal peduncle length (ventral), caudal peduncle depth, dorsal fin base length, anal fin base fin length, pectoral fin length, pelvic fin length, caudal upper lobe length, caudal fork length, caudal lower lobe length, dorsal fin length, anal fin length and gape. The samples were measured regarding the weight to the nearest 0.01 g and total, fork and standard length to the nearest 0.01 mm. The Standard Length (SL) ranged from 35.0 mm to 55.0 mm and body weight ranged from 1.0 to 3.46 g.