Vol. 76 (2) 2024

ARTICLES

Impact of Environmental Salinity on Growth and Development of Naked Amoebae in Beach Sands of the Black Sea in the Region of Odesa, Ukraine

Marina Patsyuk

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Zhytomyr Ivan Franko State University, 40 Velyka Berdychivska Street, Zhytomyr, 10008 Ukraine; E-mail: kostivna@ukr.net; https://orcid.org/0000-0003-1185-8101

https://doi.org/10.71424/azb76.2.002740

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Abstract
The impact of different levels of salinity (17.6 ‰, 12.6 ‰, 7.6 ‰ and 2.6 ‰) on growth and development of naked amoebae was studied in beach sands of the Black Sea in the region of Odesa, Ukraine. The decreasing salinity was followed by reduced fecundity and increased generation time of the naked amoeba cells. Vannella devonica, V. aberdonica, V. plurinucleolus, Thecamoeba orbis, T. hilla, Stenamoeba sp. and Acanthamoeba griffini were the most tolerant to gradual salinity decrease, while Saccamoeba marina, Vexillifera armata, Mayorella gemmifera were less tolerant. Cochliopodium gulosum survived at a medium salinity of 17.6 ‰. Under the low medium salinities (7.6 ‰ and 2.6 ‰), most amoebae existed as floating forms. After the saline shock (12.6 ‰, 7.6 ‰ and 2.6 ‰), neither growth nor development were observed in Saccamoeba marina, Сochliopodium gulosum and Mayorella gemmifera and their floating forms remained motionless.

Key words
marine amoebae, locomotor and floating forms, salinity tolerance

How to Cite
Patsyuk М. 2024. Impact of Environmental Salinity on Growth and Development of Naked Amoebae in Beach Sands of the Black Sea in the Region of Odesa, Ukraine. Acta zoologica bulgarica 76 (2) 225-234.

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