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

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

Oceanological and Hydrobiological Studies
Volume 50 (2021): Issue 3 (September 2021)
By: Shima Bakhshalizadeh,  Ali Bani,  Shahram Abdolmalaki and  Jesus T. Ponce Palafox  
Open Access
|Sep 2021

Figures & Tables

Figure 1

Sampling locations (red closed circles) of sturgeon in the Iranian coastal waters of the Caspian Sea
Sampling locations (red closed circles) of sturgeon in the Iranian coastal waters of the Caspian Sea

Figure 2

Length–weight relationship for female (open circles and dotted line) and male (closed circles and solid line) great sturgeon in the Iranian coastal waters of the Caspian Sea; W = gutted weight (kg); FL = fork length (cm)
Length–weight relationship for female (open circles and dotted line) and male (closed circles and solid line) great sturgeon in the Iranian coastal waters of the Caspian Sea; W = gutted weight (kg); FL = fork length (cm)

Figure 3

Age composition for female and male great sturgeon between 2008 and 2010 in the Iranian coastal waters of the Caspian Sea (n = 105). Arrows indicate the direction in which the observed frequencies differed from those expected under the assumption that the age class was uncorrelated with sex.
Age composition for female and male great sturgeon between 2008 and 2010 in the Iranian coastal waters of the Caspian Sea (n = 105). Arrows indicate the direction in which the observed frequencies differed from those expected under the assumption that the age class was uncorrelated with sex.

Figure 4

The von Bertalanffy growth function fit to size-at-age relationships for female (open circles and dotted line) and male (closed circles and solid line) great sturgeon in the Iranian coastal waters of the Caspian Sea; Lt = fork length (cm)
The von Bertalanffy growth function fit to size-at-age relationships for female (open circles and dotted line) and male (closed circles and solid line) great sturgeon in the Iranian coastal waters of the Caspian Sea; Lt = fork length (cm)

Figure 5

Confidence regions (95%) of mean estimates for the growth parameters (K and L∞) for males and females of great sturgeon in1990–1994 and in 2008–2010 in the Iranian coastal waters of the Caspian Sea
Confidence regions (95%) of mean estimates for the growth parameters (K and L∞) for males and females of great sturgeon in1990–1994 and in 2008–2010 in the Iranian coastal waters of the Caspian Sea

Descriptive length and weight composition of male and female great sturgeon from the Iranian waters of the Caspian Sea in 2008–2010

SizeSexNumberMeanStandard error of the meanMinimumMaximum
Fork Length (cm)Female33214.177.0684305
Male24194.178.1084255
Weight (kg)Female33111.2610.704287
Male2469.776.724141
DOI: https://doi.org/10.2478/oandhs-2021-0027 | Journal eISSN: 1897-3191 | Journal ISSN: 1730-413X
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Language: English
Page range: 325 - 332
Submitted on: Dec 21, 2020
Accepted on: Feb 12, 2021
Published on: Sep 2, 2021
Published by: University of Gdańsk
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
age,
growth,
mortality,
management,
population dynamics
Related subjects:
Chemistry,
Chemistry, other,
Geosciences,
Geosciences, other,
Life sciences,
Life sciences, other

© 2021 Shima Bakhshalizadeh, Ali Bani, Shahram Abdolmalaki, Jesus T. Ponce Palafox, published by University of Gdańsk
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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