POPULATION DYNAMICS AND REPRODUCTIVE BIOLOGY OF CRAYFISH (ASTACUS LEPTODACTYLUS ESCHSCHOLTZ, 1823) IN SHORABIL LAKE (ARDABIL PROVINCE), NORTHWEST OF IRAN

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ABD ALMALEKI SH.; GHANINEZHAD D.; NAHRVAR R.; SAYAD RAHIM M.; KHEDMATI KAMBIZ; NOUROUZI H.A.; RASTIN R.

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Journal: Iranian Scientific Fisheries Journal Year:2009 | Volume:18 | Issue:3 Page(s): 109-118

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Title

POPULATION DYNAMICS AND REPRODUCTIVE BIOLOGY OF CRAYFISH (ASTACUS LEPTODACTYLUS ESCHSCHOLTZ, 1823) IN SHORABIL LAKE (ARDABIL PROVINCE), NORTHWEST OF IRAN

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Keywords

FRESHWATER CRAYFISHQ3

ASTACUS LEPTODACTYLUSQ3

REPRODUCTIONQ3

SHORABIL LAKEQ3

ARDEBIL PROVINCEQ3

Abstract

FRESHWATER CRAYFISH (Astacus leptodactylus Eschscholtz, 1823) is a very valuable macrobentic organism which was introduced Aras reservoir to the Shorabil Kake in the amount of 15000 specimens during the years 2002-2006. This species produce very good population in the SHORABIL LAKE. We investigate biological, biomass and MSY of the crayfish in the Lake during the years 2006-2007.Results showed that the mean total lengths and weight of this crayfish for both sexes were 82.5±32.4mmand 82.5±32.4g, respectively. Maximum total length and weight of the caught crayfish was 196mm and 328g respectively. The sex ratios of male: female crayfish caught with a funnel trap of 10mm mesh size (stretched mesh) were estimated at 1:2.4 that was significantly difference from 1:1 ratio (X2= 479.01; P<0.05). Mean number of ovarian and pleopodal eggs were estimated at 396.6±36.5 and 311.11±22.92 eggs with 95% confidence limits, respectively.The time of the first molting of the male stared from beginning of the May at a water temperature of around 14oC and ended in mid-June. The second molting of the male and the first molting of the female is done simultaneously and started in beginning of the October at a water temperature of around 17oC. REPRODUCTION period of this species started from beginning of the December and lasted until the mid-June in SHORABIL LAKE.

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APA: Copy

ABD ALMALEKI, SH., GHANINEZHAD, D., NAHRVAR, R., SAYAD RAHIM, M., KHEDMATI, KAMBIZ, NOUROUZI, H.A., & RASTIN, R.. (2009). POPULATION DYNAMICS AND REPRODUCTIVE BIOLOGY OF CRAYFISH (ASTACUS LEPTODACTYLUS ESCHSCHOLTZ, 1823) IN SHORABIL LAKE (ARDABIL PROVINCE), NORTHWEST OF IRAN. IRANIAN SCIENTIFIC FISHERIES JOURNAL, 18(3), 109-118. SID. https://sid.ir/paper/5154/en

Vancouver: Copy

ABD ALMALEKI SH., GHANINEZHAD D., NAHRVAR R., SAYAD RAHIM M., KHEDMATI KAMBIZ, NOUROUZI H.A., RASTIN R.. POPULATION DYNAMICS AND REPRODUCTIVE BIOLOGY OF CRAYFISH (ASTACUS LEPTODACTYLUS ESCHSCHOLTZ, 1823) IN SHORABIL LAKE (ARDABIL PROVINCE), NORTHWEST OF IRAN. IRANIAN SCIENTIFIC FISHERIES JOURNAL[Internet]. 2009;18(3):109-118. Available from: https://sid.ir/paper/5154/en

IEEE: Copy

SH. ABD ALMALEKI, D. GHANINEZHAD, R. NAHRVAR, M. SAYAD RAHIM, KAMBIZ KHEDMATI, H.A. NOUROUZI, and R. RASTIN, “POPULATION DYNAMICS AND REPRODUCTIVE BIOLOGY OF CRAYFISH (ASTACUS LEPTODACTYLUS ESCHSCHOLTZ, 1823) IN SHORABIL LAKE (ARDABIL PROVINCE), NORTHWEST OF IRAN,” IRANIAN SCIENTIFIC FISHERIES JOURNAL, vol. 18, no. 3, pp. 109–118, 2009, [Online]. Available: https://sid.ir/paper/5154/en

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