Descriptive analysis of catch Persian Sturgeon (Acipenser persicus Borodin, 1897) in the fishing grounds of the southern Caspian Sea basin during three decades (1991-2018)

Document Type : scientific research article

Authors

1 Ph.D. Student of Fisheries, Faculty of Agriculture and Natural Resources, Gonbad Kavos University, Gonbad Kavos, Iran

2 Corresponding Author, Associate Prof., Dept. of Fisheries, Faculty of Agriculture and Natural Resources, Gonbad Kavos University, Gonbad Kavos, Iran

3 Ph.D. in Fisheries Exploitation and Production, Iran Fisheries Organization, Hormozgan Fisheries Organization, Bandar Abbas, Iran.

4 Ph.D. in Fisheries Exploitation and Production, Management of Golestan Sturgeon Affairs, Specialized Mother Company of Agricultural Services, Gorgan, Iran.

5 . Assistant Prof., Dept. of Fisheries, Faculty of Agriculture and Natural Resources, Gonbad Kavos University, Gonbad Kavos, Iran.

6 Associate Prof., Dept. of Fisheries, Faculty of Agriculture and Natural Resources, Gonbad Kavos University, Gonbad Kavos, Iran

Abstract

The present study was conducted with the aim of investigating the changes in the length and weight of persian sturgeon (Acipenser persicus) located in the waters of Golestan, Mazandaran and Gilan provinces between 1991-2018. وIn the study of the population during these three decades, the maximum length of the fork of this species was 240 cm for the male of Mazandaran province. The results of annual comparisons showed that the female of Golestan province had the highest average fork length and average total weight (159 cm, 30 kg). The male of Gilan province had the lowest average fork length and total weight (124 cm and 13 kg). Also, during these years, females of Golestan province accounted for the highest and lowest catches in the persian sturgeon population. The longitudinal frequency of males and females was compared in the same number and length classes. The highest frequency during these three decades was for females in the length class of 148-160 cm and for males in the length class of 136-148 cm in the southern basin of the Caspian Sea. The amount of catch has been decreasing over time and the population of females has decreased significantly during these years.

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References

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Journal of Utilization and Cultivation of Aquatics
Volume 13, Issue 4
January 2025
Pages 77-89

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