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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">tinro</journal-id><journal-title-group><journal-title xml:lang="ru">Известия ТИНРО</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya TINRO</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1606-9919</issn><issn pub-type="epub">2658-5510</issn><publisher><publisher-name>ТИНРО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26428/1606-9919-2025-205-767-780</article-id><article-id custom-type="edn" pub-id-type="custom">KUTFOK</article-id><article-id custom-type="elpub" pub-id-type="custom">tinro-1085</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</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>AQUACULTURE</subject></subj-group></article-categories><title-group><article-title>Расчет ожидаемого промыслового возврата при зарыблении заливов Калининградской области молодью европейского угря Anguilla anguilla</article-title><trans-title-group xml:lang="en"><trans-title>Calculation of the expected commercial return after stocking the lagoons in the Kaliningrad region with juvenile european eel Anguilla Anguilla</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2400-4618</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чебан</surname><given-names>К. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Cheban</surname><given-names>K. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чебан Ксения Андреевна, кандидат биологических наук, начальник отдела</p><p>236040, г. Калининград, Советский проспект, 1</p></bio><bio xml:lang="en"><p>Ksenia A. Cheban, Ph.D., head of department</p><p>1, Sovetsky Prospect, Kaliningrad, 236040</p></bio><email xlink:type="simple">kseniia.cheban@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7795-9071</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Савина</surname><given-names>Л. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Savina</surname><given-names>L. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Савина Лиана Валерьевна, кандидат биологических наук, доцент, преподаватель</p><p>236040, г. Калининград, Советский проспект, 1</p></bio><bio xml:lang="en"><p>Liana V. Savina, Ph.D., associate professor, lecturer</p><p>1, Sovetsky Prospect, Kaliningrad, 236040</p></bio><email xlink:type="simple">liana.savina@klgtu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Калининградский государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kaliningrad State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>10</day><month>01</month><year>2026</year></pub-date><volume>205</volume><issue>4</issue><fpage>767</fpage><lpage>780</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Чебан К.А., Савина Л.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Чебан К.А., Савина Л.В.</copyright-holder><copyright-holder xml:lang="en">Cheban K.A., Savina L.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" 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://izvestiya.tinro-center.ru/jour/article/view/1085">https://izvestiya.tinro-center.ru/jour/article/view/1085</self-uri><abstract><p>Оценена ожидаемая величина промыслового возврата для обоснования объемов зарыбления и разработки мер восстановления популяции европейского угря Anguilla anguilla в Калининградском и Куршском заливах Калининградской области. Применены три метода расчета: прямой расчет по показателям ожидаемого улова и целевых показателей пропуска производителей на нерест, рассчитанных в Планах управления, модифицированная формула С.В. Шибаева и интерполяция литературных данных. Установлено, что ожидаемая величина промыслового возврата для молоди угря массой 1–4 г в заливах Калининградской области может составить 12–14 %. Полученные значения служат основой для планирования ресурсных мероприятий, но требуют дальнейшего уточнения в рамках долгосрочной программы мониторинга, учитывающей видовые особенности угря, проведение ежегодных оценок с разделением в уловах на желтого и серебряного угря.</p></abstract><trans-abstract xml:lang="en"><p>The population of european eel Anguilla anguilla is in critical condition, having reached a historic low. In the framework of the Eel Management Plans, juvenile eels have been stocked in the Kaliningrad and Curonian Lagoons since 2022. The key indicator for effectiveness of these measures is the commercial return, but its calculation is complicated by lack of systematic monitoring. To justify the volume of stocking and effect of measures for restoring the population, the expected commercial return is estimated by three methods of calculation: i) direct calculation based on expected catch and planned escapement of spawners to the spawning grounds; ii) interpolation of data from scientific literature; and iii) modified formula proposed by S.V. Shibaev. As the result, the expected value of commercial return for juvenile eels weighing 1–5 g is estimated as 12–14 % for these two vast lagoons in the Kaliningrad Region. This value can be used as a basis for planning resource activities, but require further clarification within the long-term monitoring program that conducts annual assessments of the eel stock taking into account the species features, as separate counting the yellow and silver stages of eel in catches.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>европейский угорь</kwd><kwd>Anguilla anguilla</kwd><kwd>промысловый возврат</kwd><kwd>пополнение запаса</kwd><kwd>улов</kwd><kwd>серебряный угорь</kwd><kwd>желтый угорь</kwd><kwd>стекловидная личинка</kwd></kwd-group><kwd-group xml:lang="en"><kwd>european eel</kwd><kwd>Anguilla Anguilla</kwd><kwd>fish return</kwd><kwd>fish stock replenishment</kwd><kwd>catch</kwd><kwd>silver eel</kwd><kwd>yellow eel</kwd><kwd>glass larva</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Мы благодарим анонимных рецензентов за анализ нашей работы и ценные рекомендации, которые были учтены при доработке статьи.</funding-statement><funding-statement xml:lang="en">The authors are thankful to anonymous reviewers for their detailed analysis of the study and valuable recommendations taken into account in the article.</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">Безденежных В.А., Петухов В.Б., Петриков А.М. 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