Investigation on age, growth and reproduction of Riffle Minnow Alburnoides bipuctatus (Bloch, 1782) in Zarrin-Gol River, East Alborz Mountain
Subject Areas : New Technologies in Aquaculture Development
Keywords: growth, Reproduction, Alburnoides bipunctatus, Keywords: Age, Zarrin-Gol River,
Abstract :
Abstract The study was conducted to determine age, growth and reproduction of Alburnoides bipunctatus in Zarrin Gol River from October 2004 to September 2005. The largest specimen was a famle with 110 mm TL and 4+ years of age and the largest observed male was with 95mm TL and 4+ years of age. Both sexes had five age groups. The age group of 3+ was the most frequent age in both sexes of the population. There was no significant difference in sex ratio. The growth model was negative allometric in both sexes. Condition factor was better in famles than in males in all age groups. The highest growth rate was observed between 0+ and 1+ ages. Estimation of parameters of von Bertalanffy growth equation showed that L infinity (L¥=107.23mm) and the growth coefficient (k=0.558 year-1) of females were more than that of males (L¥=99.64mm, k=0.518 year-1).
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