Otolith biometry and some growth parameters of capoeta umbla inhabiting murat river (Palu-Elaziğ)

In this study, the otolith biometry and total length-weight relationships of Tigris scraper fish (Capoeta umbla) were investigated. For this purpose, a total of 52 fish samples were obtained from commercial fishermen fishing between Beyhan Dam Body of Murat River and Örencik 15th Fishing Area. The lengths and weights of examined fish samples were determined as 17.10-46.20 cm and 53.95-995.76 g for all fish. The average otolith lengths for the right and left otoliths of C. umbla individuals were determined as 1.853-3.181 mm, otolith widths as 1.511-2.241 mm and otolith weights as 0.0015-0.0078 g, respectively. The relationships between the total length of the fish and otolith length and otolith width, and between the total fish length and otolith weight were found to be positive and at a good level. The difference between the length, width and weight of the otoliths taken from the right and left sides of the fish was found to be statistically insignificant (P>0.05). The b values for length-weight relationship Tigris scraper were calculated as 3.12 for all individuals, 3.0032 for females and 3.1373 for males. Therefore, the growth type was found to be positive allometric for Tigris scraper. Asa result, this study makes an important contribution to the literature on the biological characteristics of the Tigris scraper fish in the Murat River.