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 (Ws ) equation by means of the empirical percentile (EmP) method. The resulting Ws equation was log10 Ws = 3.801 + 1.783 center dot log10TL + 0.329 center dot(log10TL)2. Over the range of application (70220mm TL), the EmP Ws equation was not biased by length, and the use of this equation is suggested as a way to calculate the relative weight (Wr ) of Aegean chub throughout the species' distribution area. Received June 12, 2012; accepted July 27, 2012