Growth Patterns of Alburnoides cf. tabarestaensis in Mobarakabad River of Minoodasht–Golestan Province

To study the biological characteristics of Alburnoides cf. tabarestaensis, 325 fish were sampled from March 2017 to July 2017 using electrofishing device. Sex ratio of male to female was 1:0.93 showing no significant difference between sex ratio (X2 = 0.151). Maximum total length and weight were 11.5 cm and 18.18 g for females, 10.5 cm and 11.48 g for males, respectively. The weight-length relationship of female was W = 0.0091 TL3.13 and that of male was W = 0.0091 TL3.15 and the total population W = 0.0091 TL3.14. The results showed positive allometric growth pattern for this species is in the Mobarakabad River (t-test, t male= 2.70, female= 2.52, population= 3.90). The condition factor showed the lowest value for both sexes in July and highest value for male in March and for female in April. The highest instantaneous growth rate was observed for both males and females at zero to one year old. Growth parameters were estimated as L∞=122.40 mm for males, L∞=127.14 mm for females and L∞=133.53 mm for population. Von bertalanffy growth equation was estimated as Lt=127.14(1-e-0.15(t+1.08)) and Lt=122.40(1-e-0.24(t+1.07)) for female and male fish, respectively