TY - JOUR ID - 4501 TI - Length-weight relationship, condition factor and relative condition factor of Alosa braschnikowi and A. caspia in the southeast of the Caspian Sea (Goharbaran) JO - Caspian Journal of Environmental Sciences JA - CJES LA - en SN - 1735-3033 AU - Fazli, Hasan AU - Daryanabard, Gholamreza AU - Naderi Jolodar, Mehdi AU - Mollaei, Hassan AU - Taleshian, Hosein AU - Bagherzadeh, Faramarz AD - Caspian Sea Ecology Research Center (CSERC), Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research, Education and Extension Organization (AREEO), Sari, Mazandaran, Iran Y1 - 2021 PY - 2021 VL - 19 IS - 1 SP - 105 EP - 113 KW - Shad KW - length KW - Condition factor KW - Relative condition factor KW - Caspian Sea DO - 10.22124/cjes.2021.4501 N2 - The main objectives of the present study were to determine the species composition of Caspian shad, genus Alosa and to estimate the LWR, CF, and Kn of A. braschnikowi and A. caspia during different months in the southeastern coast of the Caspian Sea. Two fishing methods, small mesh size beach seine and gillnet were used from December 2013 through July 2014. A. braschnikowi and A. caspia, were distinguished in the southeastern part of the Caspian Sea (Goharbaran), consisting of 57.1% and 42.9% of the Alosa catch, respectively. The slopes (b values) of the length-weight regression were 3.241 and 2.844 which were significantly different from 3 (P<0.05), indicating positive and negative allometric growth, respectively. The average CF of A. braschnikowi and A. caspia were calculated as 0.72 ± 0.12 and 0.83 ± 0.13, respectively. The average CF for both species were significantly different among months (P<0.001). There was a significantly negative correlation between size classes and CF of A. caspia. The Kn was greater than 1 for A. braschnikowi and lower than 1 for A. caspia indicating good well-being of A. braschnikowi as opposed to A. caspia in the southeastern Caspian Sea. UR - https://cjes.guilan.ac.ir/article_4501.html L1 - https://cjes.guilan.ac.ir/article_4501_42a4c27df4f3f9fbf07673530696d5a3.pdf ER -