LENGTH FREQUENCY, SEX RATIO AND RELATIVE ABOUNDANCE (CPUE) OF ASTACUS LEPTODUCTYLUS IN ARASS RESERVIOR (1997 -98)

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KARI MPOUR M.; HOSSEINPOUR N.

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Journal: Iranian Scientific Fisheries Journal Year:2000 | Volume:9 | Issue:1 Page(s): 49-65

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Title

LENGTH FREQUENCY, SEX RATIO AND RELATIVE ABOUNDANCE (CPUE) OF ASTACUS LEPTODUCTYLUS IN ARASS RESERVIOR (1997 -98)

Author(s)

KARI MPOUR M. | HOSSEINPOUR N. | Issue Writer Certificate

Keywords

ASTACUS LEPTODUCTYLISQ3

CPUEQ4

ARASS RESERVIORQ4

IRANQ4

Abstract

The length frequency, sex ratio and CPUE of ARASS RESERVIOR crayfish have been studied during a one year research project in 1997-98. Camparison of Arass crayfish with the same species of crayfish dwelling in freshwater habitatus of Turkey, Turkamenistan, Caspian sea region and also in Anzali lagoon, The Arass crayfish were higher in length and weight. The average length and weight were 120.50±0.96mm and 54.68±1.53 gr, respectively (n=3219, confidence interval 95%). In the samples, the smallest crayfish measured 78mm and weighted 12.3gr and the largest crayfish had 186mm length and 239.6 gr weight. In the crayfish traps 83.2% of catch exceeded the standard commercial size. The sex ratio during spawning period (December May) dominated by males and in other months the females had superiority in the catch. In general consideration the sex ratio during the project life dominated by males (1:1.33, n=35454). The CPUE in August was the highest and the least in January (in order of 10.32 and 0.15 crayfish per one trap in 24 hours respectively). The catching operation occured in the depth of 2.5-17.5mm in the ecosystem, and CPUE were the highest the depth of 75mm. Considering the CPUE data, the desirable catch occured in the August, September and October. Positive relationship between water temperature and CPUE observed, and optimum catch were occured when the water temperature ranged between 16-26°c.

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APA: Copy

KARI MPOUR, M., & HOSSEINPOUR, N.. (2000). LENGTH FREQUENCY, SEX RATIO AND RELATIVE ABOUNDANCE (CPUE) OF ASTACUS LEPTODUCTYLUS IN ARASS RESERVIOR (1997 -98). IRANIAN SCIENTIFIC FISHERIES JOURNAL, 9(1), 49-65. SID. https://sid.ir/paper/5032/en

Vancouver: Copy

KARI MPOUR M., HOSSEINPOUR N.. LENGTH FREQUENCY, SEX RATIO AND RELATIVE ABOUNDANCE (CPUE) OF ASTACUS LEPTODUCTYLUS IN ARASS RESERVIOR (1997 -98). IRANIAN SCIENTIFIC FISHERIES JOURNAL[Internet]. 2000;9(1):49-65. Available from: https://sid.ir/paper/5032/en

IEEE: Copy

M. KARI MPOUR, and N. HOSSEINPOUR, “LENGTH FREQUENCY, SEX RATIO AND RELATIVE ABOUNDANCE (CPUE) OF ASTACUS LEPTODUCTYLUS IN ARASS RESERVIOR (1997 -98),” IRANIAN SCIENTIFIC FISHERIES JOURNAL, vol. 9, no. 1, pp. 49–65, 2000, [Online]. Available: https://sid.ir/paper/5032/en

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