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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Doklady Biological Sciences</journal-id><journal-title-group><journal-title xml:lang="en">Doklady Biological Sciences</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Российской академии наук. Науки о жизни</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2686-7389</issn><issn publication-format="electronic">3034-5057</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">686365</article-id><article-id pub-id-type="doi">10.31857/S2686738925030038</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">The role of aquatic ecosystems as a source of omega-3 polyunsaturated fatty acids for the sand lizard <italic>Lacerta agilis</italic> (Linnaeus, 1758), inhabiting a shore biotope</article-title><trans-title-group xml:lang="ru"><trans-title>Роль водных экосистем как источника омега-3 полиненасыщенных жирных кислот для прыткой ящерицы <italic>Lacerta agilis</italic> (Linnaeus, 1758), обитающей в околоводном биотопе</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dimenko</surname><given-names>O. S.</given-names></name><name xml:lang="ru"><surname>Дименко</surname><given-names>О. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>arudchenko@sfu-kras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Rudchenko</surname><given-names>A. E.</given-names></name><name xml:lang="ru"><surname>Рудченко</surname><given-names>А. Е.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Institute of Biophysics of Siberian Branch of Russian Academy of Sciences</p></bio><bio xml:lang="ru"><p>Институт биофизики Сибирского отделения Российской академии наук</p></bio><email>arudchenko@sfu-kras.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Borisova</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Борисова</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>arudchenko@sfu-kras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tupikova</surname><given-names>A. D.</given-names></name><name xml:lang="ru"><surname>Тупикова</surname><given-names>А. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>arudchenko@sfu-kras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sushchik</surname><given-names>N. N.</given-names></name><name xml:lang="ru"><surname>Сущик</surname><given-names>Н. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Corresponding Member of the RAS, Institute of Biophysics of Siberian Branch of Russian Academy of Sciences</p></bio><bio xml:lang="ru"><p>Член-корреспондент РАН, институт биофизики Сибирского отделения Российской академии наук</p></bio><email>arudchenko@sfu-kras.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Siberian Federal University</institution></aff><aff><institution xml:lang="ru">Сибирский федеральный университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Federal Research Center “Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences”</institution></aff><aff><institution xml:lang="ru">Федеральный исследовательский центр “Красноярский научный центр Сибирского отделения Российской академии наук”</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2025</year></pub-date><volume>522</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>330</fpage><lpage>334</lpage><history><date date-type="received" iso-8601-date="2025-06-29"><day>29</day><month>06</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-06-29"><day>29</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/2686-7389/article/view/686365">https://journals.eco-vector.com/2686-7389/article/view/686365</self-uri><abstract xml:lang="en"><p>The composition and content of fatty acids of the sand lizard (<italic>Lacerta agilis</italic>) and its potential food objects in the shore and steppe biotopes were studied. For the first time, it was established that the content of long-chain omega-3 polyunsaturated fatty acids, primarily eicosapentaenoic acid (EPA), significantly increases in the tissues of lizards from a shore biotope during the period of emergence of amphibious insects from the nearby salt Lake Shira. Among all the food sources of lizards, the highest EPA content was found in chironomids imago. The content of docosahexaenoic acid (DHA) in the muscles of the lizards was also high, although this acid was not detected in the invertebrates that the lizards consumed. In this regard, it has been suggested that the sand lizard is able to biosynthesize DHA from biochemical precursors contained in food.</p></abstract><trans-abstract xml:lang="ru"><p>Изучен состав и содержание жирных кислот прыткой ящерицы <italic>Lacerta agilis</italic> и ее потенциальных пищевых объектов в околоводном и степном биотопах. Впервые установлено, что в тканях ящериц из околоводного биотопа в период вылета амфибионтных насекомых из близлежащего соленого озера Шира значительно возрастает содержание длинноцепочечных омега-3 полиненасыщенных жирных кислот, в первую очередь эйкозапентаеновой кислоты (ЭПК). Среди всех пищевых источников ящериц максимальное содержание ЭПК было у имаго хирономид. Содержание докозагексаеновой кислоты (ДГК) в мышцах ящериц также было высоким, хотя данная кислота не была обнаружена в беспозвоночных, потребляемых в пищу. В этой связи выдвинуто предположение о способности прыткой ящерицы к биосинтезу ДГК из биохимических предшественников, содержащихся в пище.</p></trans-abstract><kwd-group xml:lang="en"><kwd>sand lizard</kwd><kwd>reptiles</kwd><kwd>shore biotope</kwd><kwd>amphibious insects</kwd><kwd>eicosapentaenoic acid</kwd><kwd>docosahexaenoic acid</kwd><kwd>fatty acids</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>прыткая ящерица</kwd><kwd>рептилии</kwd><kwd>околоводный биотоп</kwd><kwd>амфибионтные насекомые</kwd><kwd>эйкозапентаеновая кислота</kwd><kwd>докозагексаеновая кислота</kwd><kwd>жирные кислоты</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство науки и высшего образования РФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of sceince and higher education of Russian Federation</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Гладышев М.И. 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