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

Shima Bakhshalizadeh
Shima Bakhshalizadeh
, 
Ali Bani
Ali Bani
, 
Shahram Abdolmalaki
Shahram Abdolmalaki
 oraz 
Jesus T. Ponce Palafox
Jesus T. Ponce Palafox
   | 02 wrz 2021
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Article Category: Original research paper
Data publikacji: 02 wrz 2021
Zakres stron: 325 - 332
Otrzymano: 21 gru 2020
Przyjęty: 12 lut 2021
DOI: https://doi.org/10.2478/oandhs-2021-0027
Słowa kluczowe
© 2021 Shima Bakhshalizadeh et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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

Size Sex Number Mean Standard error of the mean Minimum Maximum
Fork Length (cm) Female 33 214.17 7.06 84 305
Male 24 194.17 8.10 84 255
Weight (kg) Female 33 111.26 10.70 4 287
Male 24 69.77 6.72 4 141
eISSN:
1897-3191
Język:
Angielski
Częstotliwość wydawania:
4 razy w roku
Dziedziny czasopisma:
Chemistry, other, Geosciences, Life Sciences
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