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Fish species composition, sex ratio and growth parameters in Saghamo Lake (Southern Georgia)

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Abstract

We provide a first investigation of fish species composition, sex ratios, age, length-weight relationships and growth models in Saghamo Lake located in Javakheti highland (Georgia). In total 713 specimens belonging to 8 species were collected included non-native Coregonus albula, Carassius gibelio and native Alburnoides bipunctatus, Squalius cephalus, Capoeta capoeta, Romanogobio persus, Salmo cf. caspius and Barbus lacerta, among which later two were recorded for the first time in the lake. In overall, relative abundances of all species is low while some species may not be presented with viable populations. Deviation from expected sex ratio, growth at age and age structure indicates severe anthropogenic pressure as a potential driver of fish community degradation in the lake.

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Acknowledgements

This work was supported by Shota Rustaveli National Science Foundation Grant for Master Research to TK (Grant Number 15MR_ 2.1.6_21), which itself is a part of the Research grant “Study of Javakheti uplands for sustainable environmental and fisheries development” financed by Shota Rustaveli National Science Foundation (Grant Number FR/479/7-130/13). The contribution of LK was supported by CIGA No. 20152007. We would like to thank to our colleagues from the Lab of Ichthyology and hydrobiology of the Institute of Zoology, Ilia State University for their help during the field works. Additional acknowledgements are due to two anonymous reviewers for their helpful suggestions that improve the manuscript significantly.

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Authors and Affiliations

  1. Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, 165 00, Prague, Czech Republic

    Tatia Kuljanishvili & Lukáš Kalous

  2. Institute of Zoology and Center of Biodiversity Studies, Institute of Ecology, Ilia State University, Cholokashvili ave.3/4, 0165, Tbilisi, Georgia

    Levan Mumladze & Bella Japoshvili

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  1. Tatia Kuljanishvili
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  2. Levan Mumladze
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  3. Lukáš Kalous
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Correspondence to Levan Mumladze.

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Kuljanishvili, T., Mumladze, L., Kalous, L. et al. Fish species composition, sex ratio and growth parameters in Saghamo Lake (Southern Georgia). Biologia 73, 93–100 (2018). https://doi.org/10.2478/s11756-018-0012-y

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