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Tavakoli, Mahmoud, Fazlih, Hasan, Moghim, Mehdi, Behrooz Khoshghalb, Mohamad Reza. (1397). Comparing some biological characteristics of two sturgeons species, Persian sturgeon (Acipenser persicus Borodin, 1897) and Russian sturgeon (A. gueldenstaedtii Brandt & Ratzeburg, 1833) in the Caspian Sea. سامانه مدیریت نشریات علمی, 17(3), 552-563. doi: 10.22092/ijfs.2018.116505
Mahmoud Tavakoli; Hasan Fazlih; Mehdi Moghim; Mohamad Reza Behrooz Khoshghalb. "Comparing some biological characteristics of two sturgeons species, Persian sturgeon (Acipenser persicus Borodin, 1897) and Russian sturgeon (A. gueldenstaedtii Brandt & Ratzeburg, 1833) in the Caspian Sea". سامانه مدیریت نشریات علمی, 17, 3, 1397, 552-563. doi: 10.22092/ijfs.2018.116505
Tavakoli, Mahmoud, Fazlih, Hasan, Moghim, Mehdi, Behrooz Khoshghalb, Mohamad Reza. (1397). 'Comparing some biological characteristics of two sturgeons species, Persian sturgeon (Acipenser persicus Borodin, 1897) and Russian sturgeon (A. gueldenstaedtii Brandt & Ratzeburg, 1833) in the Caspian Sea', سامانه مدیریت نشریات علمی, 17(3), pp. 552-563. doi: 10.22092/ijfs.2018.116505
Tavakoli, Mahmoud, Fazlih, Hasan, Moghim, Mehdi, Behrooz Khoshghalb, Mohamad Reza. Comparing some biological characteristics of two sturgeons species, Persian sturgeon (Acipenser persicus Borodin, 1897) and Russian sturgeon (A. gueldenstaedtii Brandt & Ratzeburg, 1833) in the Caspian Sea. سامانه مدیریت نشریات علمی, 1397; 17(3): 552-563. doi: 10.22092/ijfs.2018.116505

Comparing some biological characteristics of two sturgeons species, Persian sturgeon (Acipenser persicus Borodin, 1897) and Russian sturgeon (A. gueldenstaedtii Brandt & Ratzeburg, 1833) in the Caspian Sea

Iranian Journal of Fisheries Sciences
مقاله 9، دوره 17، شماره 3، مهر 2018، صفحه 552-563    اصل مقاله (368.21 K)
نوع مقاله: Research Paper
شناسه دیجیتال (DOI): 10.22092/ijfs.2018.116505
نویسندگان
Mahmoud Tavakoli* 1؛ Hasan Fazlih2؛ Mehdi Moghim2؛ Mohamad Reza Behrooz Khoshghalb1
1International Sturgeon Research Institute- Stock Assessment Department
2Caspian Sea Ecology Research Center- Stock Assessment Department
چکیده
The objective of this study was to compare biological parameters such as length, weight, age, caviar production indices, caviar/weight, growth, condition factor and sex ratios of Persian sturgeon (Acipenser persicus Borodin, 1897) and Russian sturgeon (A. gueldenstaedti Brandt & Ratzeburg, 1833) in the Caspian Sea during 1990-2014. The results showed that a variety of differences between this two species. All these characteristics (except condition factor) of Persian sturgeon were greater than Russian sturgeon. In the long period, the average (±SD) fork length ranged from 129.3 (±11.87) to 140.9 (±15.99) cm and 145.7 (±17.61) to 157.4 (±19.31) cm for the Persian sturgeon. The caviar harvest for the Russian sturgeon ranged from 3.86 (±1.05) to 5.02 (±1.82) kg with a caviar/weight ratio were ranged from 16.9 (±4.12) to 20.1% (±5.12), while comparatively for the Persian sturgeon was greater and ranged from 4.84 (±1.62) and 7.04 (±2.58) kg with a caviar/weight ratio of 16.2 (±3.99) to 21.1 (±5.20) %. The age of both species ranged between 6 to 40 years but the modal age of Russian sturgeon was less than Persian sturgeon. The male:female sex ratio of Russian and Persian sturgeons were 0.23:1 and 0.57:1, respective. The sex ratio of Russian sturgeon was significantly different from sex ration of Persian sturgeon (P <0.001). The condition factor of Russian sturgeon were 0.92 (±0.16) and 0.74 (±0.13) % for Russian sturgeon and Persian sturgeon. Also, results of the MANOVA revealed significant differences in community structure of two species (P < 0.001). Therefore, different conservation and management activity need for these two valuable sturgeons in the Caspian Sea.
کلیدواژه‌ها
A. persicus؛ A. gueldenstaedtii؛ Age؛ Length؛ weight؛ Sex؛ Caspian Sea
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