The population dynamic of the Chub Squalius cephalus (Linnaeus, 1758) in the Shahid Rajai Dam Lake (Sari, Iran)

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SEIFI H.; RAHMANI H.; JANIKHALILI KH.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: JOURNAL OF APPLIED ICHTHYOLOGICAL RESEARCH Year:2020 | Volume:8 | Issue:3 Page(s): 39-51

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Title

The population dynamic of the Chub Squalius cephalus (Linnaeus, 1758) in the Shahid Rajai Dam Lake (Sari, Iran)

Author(s)

SEIFI H. | RAHMANI H. | JANIKHALILI KH. | Issue Writer Certificate

Keywords

S.cephalusQ1

Population dynamicsQ1

Shahid Rajaii damQ1

Abstract

To study some population dynamic parameters of the Chub (S. cephalus) in the Shahid Rajaii dam Lake, five hundred and ninety one fish were captured by gill nets (mesh size: 10, 20, 30, 40, and 50 mm) from three stations. The most frequent catch was in autumn (303) and the lowest was in winter (43). The captured fish were divided into six age groups, 0+ to 5+ years for both sexes and 2-year-olds were prevailing in both sexes. The sex ratio of female to male was 1: 1. 06. The length of animals ranged from 102 to 265 mm and the weight ranged from 11. 59 to 241. 86 g. In overall, the length and weight of the females were higher than males. The weightlength relationship was estimated as for females and for males, and for the population. Growth pattern, in all considered groups, was calculated isometric. The Von Bertalanffy growth equations for males and females were Lt=27. 04(1-e-0. 23(t+2. 03) ) and Lt=31. 4(1-e-0. 22(t+1. 31) ), respectively and the infinity length in females was higher than males. A significant difference was observed in the condition factor in both sexes. The relative length of the intestine showed a carnivorous diet for this species. The average absolute and relative fecundity were 4478. 2± 75. 6 and 54. 1± 65. 6, respectively. The average of female egg diameter was 0. 86 ± 0. 12 mm. The comparison of results of this study with the Tajan River population show that many biological parameters of this species in the Shahid Rajaii dam Lake were more favourable than those in the Tajan River.

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APA: Copy

SEIFI, H., RAHMANI, H., & JANIKHALILI, KH.. (2020). The population dynamic of the Chub Squalius cephalus (Linnaeus, 1758) in the Shahid Rajai Dam Lake (Sari, Iran). JOURNAL OF APPLIED ICHTHYOLOGICAL RESEARCH, 8(3 ), 39-51. SID. https://sid.ir/paper/393214/en

Vancouver: Copy

SEIFI H., RAHMANI H., JANIKHALILI KH.. The population dynamic of the Chub Squalius cephalus (Linnaeus, 1758) in the Shahid Rajai Dam Lake (Sari, Iran). JOURNAL OF APPLIED ICHTHYOLOGICAL RESEARCH[Internet]. 2020;8(3 ):39-51. Available from: https://sid.ir/paper/393214/en

IEEE: Copy

H. SEIFI, H. RAHMANI, and KH. JANIKHALILI, “The population dynamic of the Chub Squalius cephalus (Linnaeus, 1758) in the Shahid Rajai Dam Lake (Sari, Iran),” JOURNAL OF APPLIED ICHTHYOLOGICAL RESEARCH, vol. 8, no. 3 , pp. 39–51, 2020, [Online]. Available: https://sid.ir/paper/393214/en

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