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Information Journal Paper

Title

Effect of Shahid Rajai Dam construction on the population dynamics of Ponticola cyrius in the downstream of Tajan River

Pages

  33-48

Abstract

 To study the effect of Shahid Rajai Dam construction on population dynamics of P. cyrius in downstream of the dam, monthly sampling was carried out using electrofishing from April 2012 to March 2013. A total of 564, 219, and 263 specimens were examined from the first, second, and third station, respectively. The sex ratio of male to female was 1: 1. 42, 1: 1. 2, and 1: 0. 91 in the first, second, and third stations, respectively. Only the first station showed a significant difference with the standard ratio of 1: 1. At the first station, four groups of age composition (0+ to 3+ years) were found, while at the other stations, only three age groups (0+ to 2+ years) were found. A positive allometric Growth pattern was found at all stations for both sexes. The relationship between length and weight showed a high correlation (more than 0. 97). Bertalanffy Growth equation was calculated for males at the three stations were 134. 73(1 )  1. 067(  0. 689)   t t L e, 144. 39(1 )  0. 803(  0. 832)   t t L e and 187. 07(1 )  0. 483(  0. 896)   t t L e for females, it was 130. 54(1 )  0. 82(  0. 73)   t t L e, 145. 07(1 )  0. 59(  0. 931)   t t L e and 157. 6(1 )  0. 42(  1. 46)   t t L e. The absolute Fecundity at the first, second, and third stations was 570. 87, 330, and 303. 5, respectively. The above-mentioned parameters show a significant difference in water temperature among the stations (more than 2º C), which increase the abundance, longevity, and Fecundity of P. cyrius. Therefore, it could provide a suitable habitat for P. cyrius.

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    APA: Copy

    ESFAHANI, F., RAHMANI, H., ABDOLI, A., & JANIKHALILI, KH.. (2020). Effect of Shahid Rajai Dam construction on the population dynamics of Ponticola cyrius in the downstream of Tajan River. JOURNAL OF APPLIED ICHTHYOLOGICAL RESEARCH, 7(4 ), 33-48. SID. https://sid.ir/paper/650165/en

    Vancouver: Copy

    ESFAHANI F., RAHMANI H., ABDOLI A., JANIKHALILI KH.. Effect of Shahid Rajai Dam construction on the population dynamics of Ponticola cyrius in the downstream of Tajan River. JOURNAL OF APPLIED ICHTHYOLOGICAL RESEARCH[Internet]. 2020;7(4 ):33-48. Available from: https://sid.ir/paper/650165/en

    IEEE: Copy

    F. ESFAHANI, H. RAHMANI, A. ABDOLI, and KH. JANIKHALILI, “Effect of Shahid Rajai Dam construction on the population dynamics of Ponticola cyrius in the downstream of Tajan River,” JOURNAL OF APPLIED ICHTHYOLOGICAL RESEARCH, vol. 7, no. 4 , pp. 33–48, 2020, [Online]. Available: https://sid.ir/paper/650165/en

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