<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Demographic data of the great sturgeon, <italic>Huso huso</italic>, from the Iranian coastal waters of the Caspian Sea were derived from measurements of individuals with a fork length ranging from 84 to 255 cm, obtained from commercial fisheries. The maximum age of fish caught in the south Caspian Sea was 30 years. The estimates of the asymptotic length L<sub>∞</sub> and the growth coefficient (K) were 265.255 cm and 0.062 per year for males and 275.78 cm and 0.08 per year for females, respectively. Total mortality rates obtained by Gulland's method were larger for males (0.64) than for females (0.46). Annual mortality rates were calculated as 47% for males and 37% for females. Data obtained in this study and their comparison with data from previous studies indicate that the great sturgeon stock is definitely exploited in an unsustainable manner.</p>
</abstract>

Demographic data of the great sturgeon, Huso huso, from the Iranian coastal waters of the Caspian Sea were derived from measurements of individuals with a fork length ranging from 84 to 255 cm, obtained from commercial fisheries. The maximum age of fish caught in the south Caspian Sea was 30 years. The estimates of the asymptotic length L∞ and the growth coefficient (K) were 265.255 cm and 0.062 per year for males and 275.78 cm and 0.08 per year for females, respectively. Total mortality rates obtained by Gulland's method were larger for males (0.64) than for females (0.46). Annual mortality rates were calculated as 47% for males and 37% for females. Data obtained in this study and their comparison with data from previous studies indicate that the great sturgeon stock is definitely exploited in an unsustainable manner.

Demographics of great sturgeon (<italic>Huso huso</italic>) in Iranian waters of the Caspian Sea (2008–2010)

Department of Marine Science, Caspian Sea Basin Research Center

Department of Biology, Faculty of Science

Oceanological and Hydrobiological Studies

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Demographics of great sturgeon () in Iranian waters of the Caspian Sea (2008–2010)

Demographic data of the great sturgeon, Huso huso, from the Iranian coastal waters of the Caspian Sea were derived from measurements of individuals with a fork...

Demographics of great sturgeon (Huso huso) in Iranian waters of the Caspian Sea (2008–2010)

Article Category: Original research paper

Pubblicato online: 02 set 2021

Pagine: 325 - 332

Ricevuto: 21 dic 2020

Accettato: 12 feb 2021

DOI: https://doi.org/10.2478/oandhs-2021-0027

Parole chiave
age, growth, mortality, management, population dynamics

© 2021 Shima Bakhshalizadeh et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Demographics of great sturgeon (Huso huso) in Iranian waters of the Caspian Sea (2008–2010)

Article Category: Original research paper

Pubblicato online: 02 set 2021

Pagine: 325 - 332

Ricevuto: 21 dic 2020

Accettato: 12 feb 2021

DOI: https://doi.org/10.2478/oandhs-2021-0027

Parole chiaveage, growth, mortality, management, population dynamics

© 2021 Shima Bakhshalizadeh et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Parole chiave
age, growth, mortality, management, population dynamics