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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">fisheriesjournal</journal-id><journal-title-group><journal-title xml:lang="ru">Рыбное хозяйство</journal-title><trans-title-group xml:lang="en"><trans-title>Fisheries</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0131-6184</issn><publisher><publisher-name>ГНЦ РФ ФГБНУ «ВНИРО»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.37663/0131-6184-2022-4-76-80</article-id><article-id custom-type="elpub" pub-id-type="custom">fisheriesjournal-80</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>АКВАКУЛЬТУРА И ВОСПРОИЗВОДСТВО</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>AQUACULTURE</subject></subj-group></article-categories><title-group><article-title>Методика экспресс-определения численности культур микроводорослей рода Tetraselmis</article-title><trans-title-group xml:lang="en"><trans-title>Method of express determination of the number of microalgae cultures of the genus Tetraselmis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2098-3951</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Боцун</surname><given-names>Л. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Botsun</surname><given-names>L. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант, ведущий инженер</p><p>лаборатория динамики морских экосистем</p><p>Владивосток</p></bio><bio xml:lang="en"><p>PhD student, Lead Engineer</p><p>Marine Ecosystem Dynamics Laboratory</p><p>Vladivostok</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7135-1375</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маркина</surname><given-names>Ж. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Markina</surname><given-names>Zh. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат биологических наук, научный сотрудник, научный сотрудник лаборатории</p><p>лаборатория клеточных технологий</p><p>Владивосток</p></bio><bio xml:lang="en"><p>Candidate of Biological Sciences, Researcher, Researcher at the Laboratory</p><p>Laboratory of Cellular Technologies</p><p>Vladivostok</p></bio><email xlink:type="simple">zhannav@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4776-0624</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Масленников</surname><given-names>С. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Maslennikov</surname><given-names>S. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат биологических наук, доцент, старший научный сотрудник</p><p>лаборатория динамики морских экосистем</p><p>Владивосток</p></bio><bio xml:lang="en"><p>Senior Researcher</p><p>Laboratory of Marine Ecosystem Dynamics</p><p>Vladivostok</p></bio><email xlink:type="simple">721606@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Национальный научный центр морской биологии им. А. В. Жирмунского, Дальневосточное отделение Российской академии наук<country>Россия</country></aff><aff xml:lang="en">Laboratory of Marine Ecosystem Dynamics<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>28</day><month>08</month><year>2022</year></pub-date><volume>0</volume><issue>4</issue><fpage>76</fpage><lpage>80</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Боцун Л.А., Маркина Ж.В., Масленников С.И., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Боцун Л.А., Маркина Ж.В., Масленников С.И.</copyright-holder><copyright-holder xml:lang="en">Botsun L.A., Markina Z.V., Maslennikov S.I.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://fisheriesjournal.elpub.ru/jour/article/view/80">https://fisheriesjournal.elpub.ru/jour/article/view/80</self-uri><abstract><p>   В статье представлен алгоритм применения спектрофотометрического измерения, для определения численности клеток культур микроводорослей рода Tetraselmis, фильтрованных и нефильтрованных проб. Зависимость «плотность – численность клеток» аппроксимируется линейным уравнением, с высоким коэффициентом корреляции – более 75 %, что подтверждает высокую достоверность метода. Возможность измерения плотности нефильтрованных проб культуры на спектрофотометре позволяет получить быструю оценку численности клеток как в полевых условиях, так и в промышленных масштабах.</p></abstract><trans-abstract xml:lang="en"><p>   The article presents an algorithm for using spectrophotometric measurement to determine the number of cells of cultures of microalgae of the genus Tetraselmis filtered and unfiltered samples. The dependence "density – number of cells" is approximated by a linear equation with a high correlation coefficient, more than 75 %, which confirms the high reliability of the method. The ability to measure the density of unfiltered culture samples on a spectrophotometer allows you to quickly estimate the number of cells both in the field and on an industrial scale.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>оптическая плотность</kwd><kwd>численность</kwd><kwd>культура микроводорослей</kwd><kwd>Tetraselmis</kwd><kwd>массовое выращивание</kwd></kwd-group><kwd-group xml:lang="en"><kwd>optical density</kwd><kwd>numbers</kwd><kwd>microalgae culture</kwd><kwd>Tetraselmis</kwd><kwd>mass cultivation</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа выполнена при финансовой поддержке гранта Российского научного фонда (проект № 21-74-30004)</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>The work was financially supported by a grant from the Russian Science Foundation (project No. 21-74-30004)</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Ковалев Н.Н. 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