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A study on some biological parameters of the population of Chondrostoma angorense Elvira, 1987 (Actinopterygii: Cypriniformes: Leuciscidae) in the Devrez River, Türkiye

Ozlem Ablak Gurbuz

Ozlem Ablak Gurbuz

Department of Biology, Ankara Hacı Bayram Veli University, Polatlı Faculty of Science and LettersAnkara, Türkiye
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Gurbuz, Ozlem Ablak
  
15. Apr. 2025
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Artikel-Kategorie: Original research papers
Online veröffentlicht: 15. Apr. 2025
Seitenbereich: 10 - 20
Eingereicht: 27. Juni 2024
Akzeptiert: 15. Okt. 2024
DOI: https://doi.org/10.26881/oahs-2025.1.02
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© 2025 Ozlem Ablak Gurbuz, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Map of the Devrez River and sampling sites.
Map of the Devrez River and sampling sites.

Figure 2

Length–weight relationship of the sampled C. angorense.
Length–weight relationship of the sampled C. angorense.

Figure 3

Monthly variations in CF (mean ± SD) of C. angorense. CF, condition factor; SD, standard deviation.
Monthly variations in CF (mean ± SD) of C. angorense. CF, condition factor; SD, standard deviation.

Figure 4

Monthly variations in GSI and oocyte diameter values with SD of C. angorense. GSI, Gonadosomatic Index; SD, standard deviation.
Monthly variations in GSI and oocyte diameter values with SD of C. angorense. GSI, Gonadosomatic Index; SD, standard deviation.

Figure 5

Ogive of first maturity for females and males of C. angorense.
Ogive of first maturity for females and males of C. angorense.

Figure 6

Relationship between fecundity and FL, GW, total weight, and the age of female C. angorense. FL, fork length; GW, gonad weight.
Relationship between fecundity and FL, GW, total weight, and the age of female C. angorense. FL, fork length; GW, gonad weight.

Mean length and CF-at-age of Chondrostoma angorense in the Devrez River_

Age (years) TL (cm) CF
Female Male Female and Male Female and Male
n Mean ± SD n Mean ± SD n Mean ± SD Range Mean ± SD Range
I - - 5 13.2 ± 0.91 5 13.2 ± 0.91 11.8–14.0 1.12 ± 0.05 1.06–1.17
II 5 14.9 ± 2.51 11 16.8 ± 0.90 16 16.0 ± 1.74 11.4–17.8 1.10 ± 0.06 0.96–1.23
III 26 18.3 ± 1.72 21 19.2 ± 1.00 47 18.6 ± 1.44 16.0–22.2 1.11 ± 0.09 0.80–1.33
IV 19 21.7 ± 1.50 14 21.1 ± 1.10 33 21.4 ± 1.32 19.6–24.1 1.12 ± 0.11 0.83–1.47
V 2 23.6 ± 0.21 - - 2 23.7 ± 0.21 23.5–23.8 1.22 ± 0.03 1.20–1.24
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