Abstract
New data have been obtained on the regenerative capacity of the invading polychaete Polydora websteri Hartman in Loosanoff & Engle, 1943. The material was collected in 2019–2020 in the area of Sevastopol. Polychaetes were extracted from blisters in the valves of an exotic Black Sea oyster species—Crassostrea gigas (Thunberg, 1793). The mollusks were grown on an oyster farm. Polychaetes were kept in aquariums with filtered seawater at a temperature from 8.8 to 25.8°C and a salinity of 17.5–17.8‰. Under laboratory conditions, body segments were removed from the worms and their recovery was observed. It was found that P. websteri regenerated both the anterior and posterior parts of the body. The minimum number of segments capable of simultaneously restoring both anterior and posterior regions is three mid-body segments. The regeneration process in P. websteri depends significantly on the water temperature. In the range of 8.8–26°С, a direct relationship was established between the water temperature and the number of regenerated specimens. An inverse relationship was found between the water temperature and the time spent on regenerating the lost fragments. When water was warmed up, the proportion of regenerated P. websteri increased from 15 to 87%, and the duration of regeneration decreased by 2.5 times.
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ACKNOWLEDGMENTS
We are grateful to the highly respected reviewers for a thorough analysis of our work and valuable recommendations for improving the final version of the article.
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The study was carried out within the framework of the state task of Kovalevsky Institute of Biology of the Southern Seas on the following topics: “The Investigation of Mechanisms for Managing Production Processes in Biotechnological Complexes for the Development of Scientific Foundations for Obtaining Biologically Active Substances and Technical Products of Marine Genesis” (state registration no. 121030300149-0) and “Patterns of Formation and Anthropogenic Transformation of Biodiversity and Biological Resources of the Azov-Black Sea Basin and Other Areas of the World Ocean” (state registration no. 121030100028-0).
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Statement on the welfare of animals. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All experimental protocols were carried out in accordance with the EU guidelines for the use and care of laboratory animals (86/609/CEE) and in compliance with the rules approved by the order of the Presidium of the USSR Academy of Sciences of April 2, 1980, no. 12000-496, and the order of the USSR Ministry of Higher Education of September 13, 1984, no. 22. Every effort was made to use only the minimum number of animals required to obtain valid data.
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Lisitskaya, E.V., Boltachova, N.A. About Regeneration of Alien Polychaete Polydora websteri (Annelida: Spionidae). Russ J Biol Invasions 12, 355–361 (2021). https://doi.org/10.1134/S2075111721040068
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DOI: https://doi.org/10.1134/S2075111721040068