The Effect of Anoxia on the Content and Composition of Carotenoids in the Tissues of the Bivalve Invader Anadarakagoshimensis (Tokunaga, 1906)
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The work examined the influence of experimental anoxia on the content and qualitative composition of carotenoids in the tissues of the bivalve invader Anadara kagoshimensis (Tokunaga, 1906) under experimental conditions. The oxygen content in the water was reduced by nitrogen sparging for five hours. The exposure lasted three days. Tissue samples (gills, foot, and hepatopancreas) were collected before the experiment (control), as well as on the first, second, and third day of the experiment. The water temperature was maintained at 16–17°C. It is shown that, in anoxia, carotenoids are redistributed in favor of respiratory surfaces. In the gills, the proportion of pink-scarlet pigments, that is, pectenolone and its esters (pectenolone complex), increases. The relative content of pectenolone esters significantly increases in all studied organs; there is also a slight increase observed in the levels of allo-, diato-, and zeaxanthin esters.
Keywords:Anadara kagoshimensis (Tokunaga 1906) anoxia carotenoids Black Sea
We are grateful to the colleagues from the Research Institute for Production Development (Kyoto, Japan) and personally to Dr. T. Maoka for methodological assistance during the present research.
This work was supported as a part of a government research grant to the Kovalevskii Institute of Biology of the Southern Seas on the topic “Functional, Metabolic, and Toxicological Aspects of Hydrobionts and Their Populations in Biotopes with Different Physicochemical Regimes,” project no. АААА-А18-118021490093-4.
COMPLIANCE WITH ETHICAL STANDARDS
Conflicts of interest. The authors declare that they have no conflict of interest.
Statement on the welfare of animals. All experimental protocols were followed in accordance with the EU guiding principles for the care and use of laboratory animals (86/609/CEE) and in conformance with rules established by the Presidium of the USSR Academy of Sciences on April 2, 1980, no. 12000-496, and Order of the Ministry of Higher Institutions dated September 13, 1984, no. 22. Conscious efforts were made to reduce the number of animals necessary to obtain reliable scientific data to a minimum.
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