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  <front>
    <journal-meta>
      <journal-id journal-id-type="publisher-id">Ecological Safety of Coastal and Shelf Zones of Sea</journal-id>
      <journal-title-group>
        <journal-title xml:lang="en">Ecological Safety of Coastal and Shelf Zones of Sea</journal-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Экологическая безопасность прибрежной и шельфовой зон моря</trans-title>
        </trans-title-group>
      </journal-title-group>
      <issn publication-format="print">2413-5577</issn>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="publisher-id">20260308</article-id>
      <article-id pub-id-type="edn">IGKNBG</article-id>
      <article-categories>
        <subj-group subj-group-type="toc-heading" xml:lang="ru">
          <subject>Научная статья</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">Assessment of Toxicity of Two Drilling Fluids on the Early Development of Russian Sturgeon Acipenser gueldenstaedtii</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Оценка токсичности двух видов буровых растворов для раннего развития русского осетра Acipenser gueldenstaedtii</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name-alternatives>
            <name xml:lang="en">
              <surname>Rudneva</surname>
              <given-names>I. I.</given-names>
            </name>
            <name xml:lang="ru">
              <surname>Руднева</surname>
              <given-names>И. И.</given-names>
            </name>
          </name-alternatives>
          <contrib-id contrib-id-type="orcid">0000-0002-9623-9467</contrib-id>
          <contrib-id contrib-id-type="researcher-id">L-3758-2016</contrib-id>
          <contrib-id contrib-id-type="scopus-author-id">9266541700</contrib-id>
          <email>svg-41@mail.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <contrib contrib-type="author">
          <name-alternatives>
            <name xml:lang="en">
              <surname>Shayda</surname>
              <given-names>V. G.</given-names>
            </name>
            <name xml:lang="ru">
              <surname>Шайда</surname>
              <given-names>В. Г.</given-names>
            </name>
          </name-alternatives>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <contrib contrib-type="author">
          <name-alternatives>
            <name xml:lang="en">
              <surname>Medyankina</surname>
              <given-names>M. V.</given-names>
            </name>
            <name xml:lang="ru">
              <surname>Медянкина</surname>
              <given-names>М. В.</given-names>
            </name>
          </name-alternatives>
          <contrib-id contrib-id-type="orcid">0000-0002-9195-0399</contrib-id>
          <xref ref-type="aff" rid="aff3"/>
        </contrib>
      </contrib-group>
      <aff-alternatives id="aff1">
        <aff xml:lang="en">
          <institution>Marine Hydrophysical Institute of RAS</institution>
          <addr-line>Sevastopol</addr-line>
          <country>Russia</country>
        </aff>
        <aff xml:lang="ru">
          <institution>Морской гидрофизический институт РАН</institution>
          <addr-line>Севастополь</addr-line>
          <country>Россия</country>
        </aff>
      </aff-alternatives>
      <aff-alternatives id="aff2">
        <aff xml:lang="en">
          <institution>Company “EcoService-A”</institution>
          <addr-line>Moscow</addr-line>
          <country>Russia</country>
        </aff>
        <aff xml:lang="ru">
          <institution>ООО «ЭкоСервис-А»</institution>
          <addr-line>Москва</addr-line>
          <country>Россия</country>
        </aff>
      </aff-alternatives>
      <aff-alternatives id="aff3">
        <aff xml:lang="en">
          <institution>Moscow State University of Technology and Management K. G. Razumovsky (First Cossack University)</institution>
          <addr-line>Moscow</addr-line>
          <country>Russia</country>
        </aff>
        <aff xml:lang="ru">
          <institution>МГУТУ Московский государственный университет технологий и управления им. К. Г. Разумовского (Первый казачий университет)</institution>
          <addr-line>Москва</addr-line>
          <country>Россия</country>
        </aff>
      </aff-alternatives>
      <pub-date date-type="pub" iso-8601-date="2026-09-30" publication-format="electronic">
        <day>30</day>
        <month>09</month>
        <year>2026</year>
      </pub-date>
      <issue>3</issue>
      <fpage>125</fpage>
      <lpage>138</lpage>
      <history>
        <date date-type="received" iso-8601-date="2026-02-24">
          <day>24</day>
          <month>02</month>
          <year>2026</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2026-03-10">
          <day>10</day>
          <month>03</month>
          <year>2026</year>
        </date>
        <date date-type="accepted" iso-8601-date="2026-06-30">
          <day>30</day>
          <month>06</month>
          <year>2026</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="en">Copyright © 2026, Rudneva I.I., Shayda V.G., Medyankina M.V.</copyright-statement>
        <copyright-statement xml:lang="ru">Copyright © 2026, Руднева И.И., Шайда В.Г., Медянкина М.В.</copyright-statement>
        <copyright-year>2026</copyright-year>
        <copyright-holder xml:lang="en">Rudneva I.I., Shayda V.G., Medyankina M.V.</copyright-holder>
        <copyright-holder xml:lang="ru">Руднева И.И., Шайда В.Г., Медянкина М.В.</copyright-holder>
        <ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/>
        <license>
          <ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0/</ali:license_ref>
        </license>
      </permissions>
      <self-uri xlink:href="https://ecological-safety.ru/repository/issues/2026/03/08/" xlink:title="Страница статьи">https://ecological-safety.ru/repository/issues/2026/03/08/</self-uri>
      <abstract xml:lang="en">
        <p>Early ontogenetic stages of aquatic organisms are most susceptible to the effects of pollutants. Drilling fluids are toxic for aquatic environment and can impair the growth, development and survival of aquatic organisms. The paper studies the effect of two water-based drilling fluids (WBF 1 and WBF 2) at concentrations of 0.025, 0.05, 0.1, 0.5 and 1 mg/L on the survival of fertilized eggs and prelarvae of Russian sturgeon Acipenser gueldenstaedtii as well as the dynamics of their hatching in fresh and 5‰ saline water for 5 days. The studied drilling fluids exhibited varying toxicity. The survival of embryos in the control groups in fresh water and exposed to a medium with WBF 1 at a concentration of 0.1–0.5 mg/L did not differ, but at a concentration of 1 mg/L, all the embryos died. In salt water, at WBF 1 concentrations of 0.025 mg/L and higher, a decrease in survival by 87% was observed (p &lt; 0.01). WBF 2 did not affect the survival of the sturgeon embryos. In both control groups, larval hatching occurred on the first day, but embryos exposed to the medium with WBF 1 at a concentration of 0.025–0.5 mg/L hatched only on the second day. The number of prelarvae in the medium with all tested concentrations was less than in the control. At a concentration of 1 mg/L, prelarvae did not hatch. Significant differences in the survival rate of prelarvae in the experimental groups compared to the control were found at a WBF 1 concentration of 1 mg/L. A high positive correlation was established between the concentration of the toxicant and the mortality of fish prelarvae (R² = 0.87). No differences were found between the survival rates of fish prelarvae in the control and experimental groups maintained in WBF 2. Based on these studies, it can be concluded that WBF 2 had no toxic effect on fish prelarvae at the tested concentrations and is therefore more environmentally safe than WBF 1. Fish embryos are adequate bioindicators for assessing the toxicity of drilling fluids and can be used to assess the ecological status of coastal waters in offshore oil and gas fields.</p>
      </abstract>
      <trans-abstract xml:lang="ru">
        <p>Гидробионты на ранних онтогенетических стадиях в наибольшей степени подвержены воздействию загрязнителей. Буровые растворы токсичны для водной среды и могут нарушать рост, развитие и выживаемость водных организмов. Исследовали действие двух буровых растворов на водной основе (WBF 1 и WBF 2) в концентрации 0.025, 0.05, 0.1, 0.5 и 1 мг/л на выживаемость оплодотворенной икры и предличинок русского осетра Acipenser gueldenstaedtii, а также на динамику их вылупления в пресной и соленой (5 ‰) воде в течение 5 сут. Исследуемые буровые растворы проявляли различную токсичность. Выживаемость эмбрионов в контрольных группах в пресной воде и экспонированных в среде с WBF 1 при концентрации 0.1–0.5 мг/л не различалась, но при концентрации 1 мг/л все эмбрионы погибли. В соленой воде при концентрации WBF 1 0.025 мг/л и выше наблюдали сокращение выживаемости на 87 % (p &lt; 0.01). WBF 2 не повлиял на выживаемость эмбрионов осетра. В обеих контрольных группах вылупление личинок произошло в первые сутки, но эмбрионы, экспонированные в среде с WBF 1 при концентрации 0.025–0.5 мг/л, вылупились только на вторые сутки. Количество предличинок в среде со всеми тестируемыми концентрациями было меньше, чем в контроле. При концентрации 1 мг/л предличинки не вылупились. Достоверные различия в выживаемости предличинок в опытных группах по сравнению с контрольными были обнаружены при концентрации WBF 1 1 мг/л. Установлена высокая отрицательная корреляция между концентрацией токсиканта и выживаемостью предличинок рыб (R² = 0.87). Различий между выживаемостью предличинок в контрольной и опытной группах, содержащихся в WBF 2, не выявлено. На основании проведенных исследований можно заключить, что WBF 2 не оказал токсического действия на предличинок рыб в тестируемых концентрациях; следовательно, этот раствор является более экологически безопасным, чем WBF 1. Эмбрионы рыб являются адекватными биоиндикаторами для оценки токсичности буровых растворов и могут быть использованы для определения экологического статуса прибрежных акваторий в районах разработки нефтегазовых месторождений на шельфе.</p>
      </trans-abstract>
      <kwd-group xml:lang="en">
        <kwd>drilling fluids</kwd>
        <kwd>fish eggs</kwd>
        <kwd>fish prelarvae</kwd>
        <kwd>pollution</kwd>
        <kwd>bioassay</kwd>
        <kwd>Russian sturgeon</kwd>
        <kwd>Acipenser gueldenstaedtii</kwd>
      </kwd-group>
      <kwd-group xml:lang="ru">
        <kwd>буровые растворы</kwd>
        <kwd>загрязнение воды</kwd>
        <kwd>икра рыб</kwd>
        <kwd>предличинки</kwd>
        <kwd>биотестирование</kwd>
        <kwd>русский осетр</kwd>
        <kwd>Acipenser gueldenstaedtii</kwd>
      </kwd-group>
      <funding-group>
        <funding-statement xml:lang="en">The work was carried out with the financial support of EcoService-A LLC.</funding-statement>
        <funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке ООО «ЭкоСервис-А».</funding-statement>
      </funding-group>
    </article-meta>
  </front>
  <body>
    <p>Текст статьи не включен.</p>
  </body>
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