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Title: INFLUENCE OF THE ANTHROPOGENIC PRESSURE ON VARNA AND BELOSLAV LAKES AND THEIR ICHTHYOFAUNA

Year

2022

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Title

INFLUENCE OF THE ANTHROPOGENIC PRESSURE ON VARNA AND BELOSLAV LAKES AND THEIR ICHTHYOFAUNA

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Authors

Radoslava Bekova; Bogdan Prodanov; Todor Lambev

DOI

10.5593/sgem2022/5.1/s20.032

DOI Issue

10.5593/sgem2022/5.1

ISSN

1314-2704

ISBN

978-619-7603-46-0

Language

English

Volume

Issue

5.1

Editor

• Prof. DSc. Oleksandr Trofymchuk, UKRAINE
• Prof. Dr. hab. oec. Baiba Rivza, LATVIA

Scientific Area

Ecology and Environmental Protection

Abstract/ Foreword

The Varna and Beloslav lakes are the most strongly anthropogenized water bodies along the Bulgarian coast. At present, the lakes are again subject to deepening of the navigable channel, which significantly changes the quality of the habitats. An ecosystem approach was used to assess the status of the populations of fish species from the Varna-Beloslav Lake Complex. The paper's main purpose is to provide up-to-date information on the ichthyofauna of the largest northern Bulgarian Black sea brackish water bodies – Varna and Beloslav Lakes, the influence of the anthropogenic factor and its consequences.. The article includes data from mass kill fish and changes in physicochemical parameters in the period 2019 - 2021, compared to the previous periods, and identifies the main species affected by anthropogenic pressure. The data show that the mass death of fish includes small age groups and size classes. The anthropogenic pressure analysis shows that many fish species inhabiting the two lakes have lost their natural habitats.

References (click to open)

[1] Georgiev Z. Species composition of the ichthyofauna of the Bulgarian Black Sea lakes. Proceedings of the Research Institute of Fisheries and Oceanology – Varna, Vol. VIII, pp. 211 – 227, 1967.
[2] Karapetkova, M., M. Zhivkov. The fish in Bulgaria. Gaia Libris, Sofia, 92 p., 2006.
[3] Lambev, T., Prodanov, B., Dimitrov, L., Kotsev, I.. Digital terrain model of the Varna and Beloslav Lakes, North Bulgarian Black Sea Coast. In Eighth International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2020), Vol. 11524, pp. 740-747, 2020.
[3] Chugunova, N. Guidance for studying the age and growth of fish. ANSSR, Moscow, 156 p, 1959.
[4] Act № Н-4/14 September 2012
[5] NATURA 2000 „Mapping of conservation status and habitats - Phase 1“ - http://natura2000.moew.government.bg/Home/Map
[6] Regional report on the state of the environment in 2020. Ministry оf Environment And Water. Regional Inspectorate of Environment and Water. Varna, p. 188. 2020.

Acknowledgements (click to open)

The study was realized with the financial support of the National Scientific Fund of Bulgaria through a project entitled: „Influence of the climate changes and the increasing anthropogenic pressure on the ichthyofauna in the brackish (transitional) waters along the Bulgarian Black Sea coast“, № КП-06-М41/2 / 27.11.2020.

Type

conference

Url

https://doi.org/10.5593/sgem2022/5.1/s20.032

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Proceedings Тitle

Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022

Note

22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 04 - 10 July, 2022

Type

Proceedings Paper

Publisher

STEF92 Technology

Series

International Multidisciplinary Scientific GeoConference SGEM

Organization

SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.

Pages

249-256

Date

04 - 10 July, 2022

Online Source Type

website

Digital Source Type

8696

Keywords

anthropogenic pressure, mass kill fish, bathymetry, Varna Lake, Beloslav Lake, Northern Bulgarian Black Sea coastal sector

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Title: INFLUENCE OF THE ANTHROPOGENIC PRESSURE ON VARNA AND BELOSLAV LAKES AND THEIR ICHTHYOFAUNA

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Acknowledgements (click to open)

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