<abstract xmlns="http://www.w3.org/1999/xhtml">This study was conducted to complement existing data about the life cycle of Caspian vimba, <italic>Vimba vimba</italic> (L.), with estimations of age, growth, and mortality rates. To achieve this, 811 specimens were collected between May 2012 and June 2013 at three fisheries catch stations in southwestern regions of the Caspian Sea including Talesh, Bandar Anzali, and Kiashahr. The growth rate in vimba is relatively high at approximately 0.29 year−1 for females and 0.32 year−1 for males. Asymptotic lengths are 245 mm and 233 mm for females and males, respectively. The growth pattern was isometric for both males and females. The overall sex ratio was balanced (1: 0.92). The instantaneous coefficients of total, natural, and fishing mortality were 1.27, 0.4, and 0.8 year, respectively, and the current exploitation ratio was 0.63 year−1. Results showed that the growth rate of males is higher than that of females. Considering the exploitation ratio, it is apparent that the vimba population is experiencing significant legal and illegal exploitation pressure.</abstract>

This study was conducted to complement existing data about the life cycle of Caspian vimba, Vimba vimba (L.), with estimations of age, growth, and mortality rates. To achieve this, 811 specimens were collected between May 2012 and June 2013 at three fisheries catch stations in southwestern regions of the Caspian Sea including Talesh, Bandar Anzali, and Kiashahr. The growth rate in vimba is relatively high at approximately 0.29 year−1 for females and 0.32 year−1 for males. Asymptotic lengths are 245 mm and 233 mm for females and males, respectively. The growth pattern was isometric for both males and females. The overall sex ratio was balanced (1: 0.92). The instantaneous coefficients of total, natural, and fishing mortality were 1.27, 0.4, and 0.8 year, respectively, and the current exploitation ratio was 0.63 year−1. Results showed that the growth rate of males is higher than that of females. Considering the exploitation ratio, it is apparent that the vimba population is experiencing significant legal and illegal exploitation pressure.

Life history traits and fishing mortality estimations of Caspian vimba, <italic>Vimba vimba</italic> (L.), in southwestern coastal regions of the Caspian Sea

Department of Fisheries, Faculty of Natural Resources

International Sturgeon Research Institute

Department of Biology, Faculty of Science

Fisheries & Aquatic Life

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Life history traits and fishing mortality estimations of Caspian vimba,  (L.), in southwestern coastal regions of the Caspian Sea

This study was conducted to complement existing data about the life cycle of Caspian vimba, Vimba vimba (L.), with estimations of age, growth, and mortality...

Life history traits and fishing mortality estimations of Caspian vimba, Vimba vimba (L.), in southwestern coastal regions of the Caspian Sea

Published Online: Nov 28, 2017

Page range: 145 - 155

Received: Nov 11, 2016

Accepted: Aug 06, 2017

DOI: https://doi.org/10.1515/aopf-2017-0014

Keywords
Age, growth, mortality, exploitation rate, population structure, Caspian Sea

© 2017 Archives of Polish Fisheries

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Life history traits and fishing mortality estimations of Caspian vimba, Vimba vimba (L.), in southwestern coastal regions of the Caspian Sea

Published Online: Nov 28, 2017

Page range: 145 - 155

Received: Nov 11, 2016

Accepted: Aug 06, 2017

DOI: https://doi.org/10.1515/aopf-2017-0014

KeywordsAge, growth, mortality, exploitation rate, population structure, Caspian Sea

© 2017 Archives of Polish Fisheries

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Age, growth, mortality, exploitation rate, population structure, Caspian Sea