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0.05). The mean percentage of sexual maturity index (GSI) for male and female at behind the dam was 2.52±2.39% and 4.66±3.83%, and this index for male and female at below the dam was 3.7±2.56% and 4.09±2.61%, respectively. Mean liver index (HSI) for male and female at behind the dam was obtained 1.18±0.09% and 1.25±0.07%, and for male and female at below the dam was 0.66±0.30% and 1.03±0.27%, respectively. According to results of this study, fish in upstream and downstream of the Alborz Dam in many of the reproductive characteristics had a similar situation.]]>
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