Length-weight, length-length and empirical standard weight equations for Capoeta baliki, Capoeta sieboldii and Chondrostoma angorense, three endemic cyprinid species of northwestern Anatolia

Abstract

In this study, length and weight data for three endemic fish species of North-western Anatolia (Capoeta baliki, Capoeta sieboldii and Chondrostoma angorense) were collected throughout their distribution ranges and used to estimate length-length, total length (TL) - weight and empirical standard weight (W-s) equations. The obtained W-s equations were: log(10)W(s) = -6.743 + 4.768 log(10) TL - 0.437 log(10) TL2 (TL range: 7-28 cm) for C. baliki; log(10)W(s) = - 5.966 + 3.833 log(10)TL - 0.181 log(10) TL2 (TL range: 7-36 cm) for C. sieboldii; log(10)W(s) = - 10.017 + 7.402 log(10)TL - 0.971 log(10)TL(2) (TL-range: 7-24 cm) for C. angorense. For C. angorense, these data represent the first reference on length-weight relationship for this species. In addition, a new maximum length was reported for C. baliki.