Length-weight, length-length relationships and condition factor of Rutilus kutum (Kamensky, 1901) from different parts of the Caspian Sea basin

Authors

  • Abbasi, Keyvan Inland Waters Aquaculture Research Center, Iranian Fisheries Sciences Research Institute, Agricultural Research, Education and Extension Organization, Bandar Anzali, Iran.
  • Eagderi, Soheil Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran.
  • Mouludi-Saleh, Atta Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran.
  • Nikmehr, Nasrin Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Iran.
Abstract:

During 2019, the length-weight, length-length relationships and condition factor of Caspian kutum, Rutilus kutum  (Kamensky, 1901) were studied by catching a total of 339 specimens were collected from Chelvand, Khalehsara, Sefid, Khoshk and Shir rivers, Anzali Wetland and Turkmen Shores of the Caspian Sea basin. The equation W =aTLb was used to calculate the length-weight relationship, FL=a + bTL for the length-weight relationship, and K= (W / L3) × 100 to calculate condition factor. The b-value were estimated from 2.47 to 3.17 and condition factor from 0.85 to 1.01. Maximum and minimum parameter of b-value and condition factor were related to the Khoshk River, Torkman shore and Anzali wetland and Sefid River, respectively. In addition, the growth pattern was positive allometric for the Chelvand, Khoshk and Shir populations, isometric for the Khalesara population and negative allometric for others.

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Journal title

volume 9  issue 2

pages  41- 50

publication date 2021-12

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