Empirical Standard Weight Equation for the Aegean Chub Squalius fellowesii, an Endemic Freshwater Fish Species of Western Anatolia, Turkey

Abstract

Data on length and weight of Aegean chub Squalius fellowesii, an endemic species distributed in the Aegean drainages of Anatolia, Turkey, were used to calculate a standard weight (W_s ) equation by means of the empirical percentile (EmP) method. The resulting W_s equation was log₁₀ W_s = −3.801 + 1.783·log₁₀TL + 0.329·(log₁₀TL)². Over the range of application (70–220 mm TL), the EmP W_s equation was not biased by length, and the use of this equation is suggested as a way to calculate the relative weight (W_r ) of Aegean chub throughout the species’ distribution area.

Received June 12, 2012; accepted July 27, 2012

ACKNOWLEDGMENTS

We thank Nildeniz Top and Uğur Karakuş for assistance in sampling. We are grateful to Michael Godard for correcting the English. This work was supported by the Research Fund of Muğla Sıtkı Koçman University (Project Number 09/28).