Age structure and growth of the Gurra rufa (Cyprinidae), in southern Iran
Paper Details
Age structure and growth of the Gurra rufa (Cyprinidae), in southern Iran
Abstract
The age structure and growth of Gurra rufa (Heckel, 1843), in the Dalaki river (Boushehr province in southern Iran) were studied in samples caught from May 2007 to September 2007. The maximum total lengths were 171 mm in females (168) and 188 mm in males (156). Age determination based on the scale and opercle readings shows that the population has 4 age classes. The growth of both sexes was isometric (b=2.89 males, b=2.93 females). The highest growth rate was observed between age 1 and 2 in both sexes. Growth parameters were computed by the von Bertalanffy equation for females and males as: L∞ = 164.14, W∞ =117.11¸ t0 = -1.16, K= 0.189 and L∞=168.16, W∞=116.28, t0=-1.14, K= 0.213 respectively.
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