Iranian Journal of Fisheries Sciences
مجله علوم شیلاتی ایران
IJFS
Agriculture
http://jifro.ir
1
admin
1562-2916
10.18869/acadpub.ijfs
en
jalali
1397
4
1
gregorian
2018
7
1
17
3
online
1
fulltext
other
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
Biology & physiology
Biology & physiology
پژوهشي
Orginal research papers
The objective of this study was to compare the biological parameters such as length, weight, age, caviar production indices, caviar/weight, condition factor and sex ratio of Persian sturgeon (<em>Acipenser persicus</em> Borodin, 1897) and Russian sturgeon (<em>A. gueldenstaedtii </em>Brandt & Ratzeburg, 1833) in the Caspian Sea during 1990-2014. All these characteristics (except condition factor) of Persian sturgeon were greater than the Russian sturgeon. In the long period, annually average (±SD) fork length ranged from 129.3 (±11.87) to 140.9 (±15.99) cm for Russian sturgeon and 145.7 (±17.61) to 157.4 (±19.31) cm for the Persian sturgeon. The annually 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, respectively. The sex ratio of Russian sturgeon was significantly different from sex ratio of Persian sturgeon (<em>p</em><0.001). The condition factor of Russian and Persian sturgeons were 0.92 (±0.16) and 0.74 (±0.13), respectively. Moreover, results of the MANOVA revealed significant differences in population structure of two species (<em>p</em><0.001). Therefore, different conservation and management activities need for these two valuable sturgeons in the Caspian Sea.
Acipenser persicus, Acipenser gueldenstaedtii, Age, Length, Weight, Sex, Caspian Sea
552
563
http://jifro.ir/browse.php?a_code=A-10-2161-2&slc_lang=other&sid=1
M.
Tavakoli
m_tavakoli_e@yahoo.com
100319475328460029562
100319475328460029562
Yes
International Sturgeon Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran
International Sturgeon Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran
H.
Fazli
100319475328460029563
100319475328460029563
No
Iranian Fisheries Science Research Institute, Caspian Sea Ecology Research Center, Agricultural Research, Education and Extension Organization, Sari, Iran
Iranian Fisheries Science Research Institute, Caspian Sea Ecology Research Center, Agricultural Research, Education and Extension Organization, Sari, Iran
M.
Moghim
100319475328460029564
100319475328460029564
No
Iranian Fisheries Science Research Institute, Caspian Sea Ecology Research Center, Agricultural Research, Education and Extension Organization, Sari, Iran
Iranian Fisheries Science Research Institute, Caspian Sea Ecology Research Center, Agricultural Research, Education and Extension Organization, Sari, Iran
M.R.
Behrooz Khoshghalb
100319475328460029565
100319475328460029565
No
International Sturgeon Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran
International Sturgeon Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran