CATCH STATUS AND POPULATION STRUCTURE OF KUTUM (RUTILUS FRISII KUTUM) IN IRANIAN COASTAL WATER OF THE CASPIAN SEA

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ABD ALMALEKI SH.; HASHEMI AMENEH SADAT; NAHREVAR R.

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Journal: JOURNAL OF MARINE SCIENCES AND TECHNOLOGY Year:2008 | Volume:6 | Issue:3-4 Page(s): 51-62

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Title

CATCH STATUS AND POPULATION STRUCTURE OF KUTUM (RUTILUS FRISII KUTUM) IN IRANIAN COASTAL WATER OF THE CASPIAN SEA

Author(s)

ABD ALMALEKI SH. | HASHEMI AMENEH SADAT | NAHREVAR R. | Issue Writer Certificate

Keywords

RUTILUS FRISII KUTUMQ3

‍CATCHQ2

POPULATION STRUCTUREQ2

GROWTH AND MORTALITY PARAMETERSQ3

IRANIAN COASTAL WATER OF THE CASPIAN SEAQ3

Abstract

The POPULATION STRUCTURE and fishery of kutum (RUTILUS FRISII KUTUM) in the IRANIAN COASTAL WATER OF THE CASPIAN SEA were investigated using a combination of size frequency and size- at- age data derived from regular monthly samples of commercial catches. Total catch of kutum (including poaching) was estimated 6612.5 tonnes that comprised 43.3 % of the total catch of all commercial bony fish species in 2004-2005 fishing season.Results showed that the mean fork length was 38.2±5.9 cm. The kutum ranged in age from 1 to 8 years with a mean age of 4.2 years. The age group of 3, 4 and 5 years constituted 85.5 % of the age composition. Parameter values of the Von Bertalanffy growth equation fit to size at age data (males and females combined) were: K=0.15 year-1, L¥=60.7 cm (fork length) and t0=-1.75 year. The annual instantaneous rate of total mortality (Z) derived from length converted catch curve was 0.88 year-1. The annual instantaneous natural mortlity (M) derived from Pauly’s imperical formula was estimated 0.31 year-1 and annual fishing mortality was 0.52 year-1. Overall results showed that the growth rate of Caspian kutum had decreased in comparison to previous years, which seems to be due to non selective artificial breeding in more than 20 years of practice.

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APA: Copy

ABD ALMALEKI, SH., HASHEMI, AMENEH SADAT, & NAHREVAR, R.. (2008). CATCH STATUS AND POPULATION STRUCTURE OF KUTUM (RUTILUS FRISII KUTUM) IN IRANIAN COASTAL WATER OF THE CASPIAN SEA. JOURNAL OF MARINE SCIENCES AND TECHNOLOGY, 6(3-4), 51-62. SID. https://sid.ir/paper/74519/en

Vancouver: Copy

ABD ALMALEKI SH., HASHEMI AMENEH SADAT, NAHREVAR R.. CATCH STATUS AND POPULATION STRUCTURE OF KUTUM (RUTILUS FRISII KUTUM) IN IRANIAN COASTAL WATER OF THE CASPIAN SEA. JOURNAL OF MARINE SCIENCES AND TECHNOLOGY[Internet]. 2008;6(3-4):51-62. Available from: https://sid.ir/paper/74519/en

IEEE: Copy

SH. ABD ALMALEKI, AMENEH SADAT HASHEMI, and R. NAHREVAR, “CATCH STATUS AND POPULATION STRUCTURE OF KUTUM (RUTILUS FRISII KUTUM) IN IRANIAN COASTAL WATER OF THE CASPIAN SEA,” JOURNAL OF MARINE SCIENCES AND TECHNOLOGY, vol. 6, no. 3-4, pp. 51–62, 2008, [Online]. Available: https://sid.ir/paper/74519/en

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