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A natural hybrid of Leuciscus cephalus (L.) and Chalcalburnus chalcoides (Güldenstädt)(Osteichthyes‐Cyprinidae) from Lake Tödürge (Sivas, Turkey)

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Hybridization between Leuciscus cephalus and Chalcalburnus chalcoides was identified from biometrical features in 55 fish caught from Lake Tödürge, Sivas, Turkey, between April 1994 and November 1997. The hybrid index Vh for metric and meristic characters was intermediate (Vh = 45·6) compared with their parents (L. cephalus Vh = 0 or negative and C. chalcoides Vh ≥ 100). Morphological, metric and meristic features of L. cephalus × C. chalcoides also resembled those of the parents. The majority presented an intermediate position which was best shown by the shape of mouth, caudal fin, gill rakers and pharyngeal teeth, and also by the caudal peduncle depth, head and interorbital width, predorsal and preanal distance, height of anal fin, length of anal base and other characters.
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Keywords: Lake Tödürge; chub; intergeneric hybrid; shemaya

Document Type: Regular Paper

Affiliations: 1: Cumhuriyet University, Faculty of Arts and Sciences, Department of Biology, Sivas, Turkey and 2: Hacettepe University, Faculty of Sciences, Department of Biology, Ankara, Turkey

Publication date: 2005-04-01

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