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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">ecodag</journal-id><journal-title-group><journal-title xml:lang="ru">Юг России: экология, развитие</journal-title><trans-title-group xml:lang="en"><trans-title>South of Russia: ecology, development</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1992-1098</issn><issn pub-type="epub">2413-0958</issn><publisher><publisher-name>State Institute of Applied Ecology of the Republic of Dagestan</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18470/1992-1098-2021-4-8-17</article-id><article-id custom-type="elpub" pub-id-type="custom">ecodag-2339</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>ЭКОЛОГИЯ ЖИВОТНЫХ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ECOLOGY OF ANIMALS</subject></subj-group></article-categories><title-group><article-title>Состояние популяций раков (Astacidae) восточного побережья Каспийского моря</article-title><trans-title-group xml:lang="en"><trans-title>Status of Crayfish Populations (Astacidae) on the Eastern Coast of the Caspian Sea</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4305-6111</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ушивцев</surname><given-names>В. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Ushivtsev</surname><given-names>V. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Б. Ушивцев, кандидат биологических наук, директор Каспийского филиала</p><p>414056, г. Астрахань, ул. Савушкина, 6, корп. 27Тел. +78512544559</p></bio><bio xml:lang="en"><p>Vladimir B. Ushivtsev, Candidate of Biological Sciences, Director, Caspian Branchbldg. 27, 6 Savushkina St, Astrakhan, 414056Tel. +78512544559</p></bio><email xlink:type="simple">caspy@bk.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/0000-0002-5819-6224</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Галактионова</surname><given-names>М. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Galaktionova</surname><given-names>M. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Майя Л. Галактионова</p><p>Москва</p></bio><bio xml:lang="en"><p>Maya L. GalaktionovaMoscow</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/0000-0003-0462-5553</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Котеньков</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kotenkov</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей А. Котеньков</p><p>Москва</p></bio><bio xml:lang="en"><p>Sergey A. KotenkovMoscow</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/0000-0003-1402-7071</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Синицына</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sinitsyna</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Татьяна А. Синицына</p><p>Москва</p></bio><bio xml:lang="en"><p>Tatyana A. SinitsynaMoscow</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/0000-0002-4902-691X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ахмедова</surname><given-names>Г. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Akhmedova</surname><given-names>G. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гульнара А. Ахмедова</p><p>Махачкала</p></bio><bio xml:lang="en"><p>Gulnara A. AkhmedovaMakhachkala</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5594-3730</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шозаи</surname><given-names>Мехди Годрати</given-names></name><name name-style="western" xml:lang="en"><surname>Shojaei</surname><given-names>Mehdi Ghodrati</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мехди Годрати Шозаи</p><p>Ноор</p></bio><bio xml:lang="en"><p>Mehdi Ghodrati ShojaeiNoor</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт океанологии им. П.П. Ширшова РАН<country>Россия</country></aff><aff xml:lang="en">P.P. Shirshov Institute of Oceanology RAS<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Дагестанский государственный университет<country>Россия</country></aff><aff xml:lang="en">Dagestan State University<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">Университет Тарбират Модарес<country>Иран</country></aff><aff xml:lang="en">Tarbiat Modares University<country>Islamic Republic of Iran</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>08</day><month>01</month><year>2022</year></pub-date><volume>16</volume><issue>4</issue><elocation-id>8‐17</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Ушивцев В.Б., Галактионова М.Л., Котеньков С.А., Синицына Т.А., Ахмедова Г.А., Шозаи М.Г., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Ушивцев В.Б., Галактионова М.Л., Котеньков С.А., Синицына Т.А., Ахмедова Г.А., Шозаи М.Г.</copyright-holder><copyright-holder xml:lang="en">Ushivtsev V.B., Galaktionova M.L., Kotenkov S.A., Sinitsyna T.A., Akhmedova G.A., Shojaei M.G.</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://ecodag.elpub.ru/ugro/article/view/2339">https://ecodag.elpub.ru/ugro/article/view/2339</self-uri><abstract><p>Цель работы – изучение распространения и запасов раков на восточном шельфе Каспийского моря в местах их массового обитания.Материал и методы. Исследования проведены весной‐летом 2019 г. Сбор материала осуществляли легководолазы методом маршрутного учета на трансектах площадью 100м2. Собранных раков определяли до вида, измеряли, взвешивали, оценивали плодовитость. Расчет численности осуществляли на основе оценки плотности скоплений на маршрутах (экз./м2) с дальнейшим пересчетом на площади биотопов, которые определяли с помощью данных космического мониторинга Каспийского моря. Оценку запасов проводили на основе размерно‐весовых характеристик собранных особей.Результаты. На обследованном участке обитают два вида астацид: Pontastacus eichwald Воtt – длиннопалый рак, и Caspiastacus pachypus Rathke – толстопалый рак. По сравнению с архивными данными 70‐90‐х годов прошлого столетия произошли изменения. Расширилась площадь ареала и увеличилась численность C. рachypus. Снизилась плодовитость как C. рachypus, так и P. еichwald.Заключение. Запасы раков на обследованном участке имеют промысловое значение. Использование данных космических съемок существенно повышает объективность исследований.</p></abstract><trans-abstract xml:lang="en"><p>Aim. This work aims to study the distribution and stocks of crayfish on the eastern shelf of the Caspian Sea at places where they mostly habitat.Material and Methods. The studies were implemented in the spring and summer of 2019. The material was collected by scuba divers surveying routes of transects 100 m2 in area. Collected crayfish were identified at species level, measured, weighed and their fertility was evaluated. Their abundance was calculated by estimating the aggregation density along the routes (ind./m2), with subsequent recalculation for the biotope areas, which were identified using data from the Caspian Sea satellite monitoring. The stocks were estimated according to the size and weight characteristics of collected individuals.Results. Two astacid species inhabit the surveyed area: Pontastacus eichwald Bott – long‐clawed crayfish and Caspiastacus pachypus Rathke – thick‐clawed crayfish. Certain changes have occurred compared with archival data of the 1970s‐1990s. The range area has expanded and the abundance of C. pachypus has increased. The fertility of both C. pachypus and P. eichwald has reduced.Conclusion. The crayfish stocks in the surveyed area are of commercial importance. The application of satellite survey data greatly increases the objectivity of research.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Каспийское море</kwd><kwd>восточное побережье</kwd><kwd>раки</kwd><kwd>распространение</kwd><kwd>видовой состав популяций</kwd><kwd>особенности биологии видов</kwd><kwd>промысловая и хозяйственная ценность запасов</kwd><kwd>допустимые объемы вылова</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Caspian Sea</kwd><kwd>eastern coast</kwd><kwd>crayfish</kwd><kwd>distribution</kwd><kwd>species composition of populations</kwd><kwd>features of species biology</kwd><kwd>commercial and economic value of stocks</kwd><kwd>total allowable catch</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа выполнена в рамках Государственного задания: тема No 0128‐2021‐0004, при финансовой поддержке гранта РФФИ No 20‐54‐56053 и гранта ННФИ No99003103.</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>The research was conducted in the framework of State Assignment of IORAS (Subject No. 0128‐2021‐0004) and was also funded by RFBR through the research project No 20‐54‐56053 and by INSF, project number No99003103.</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">Бокова Е.Н. 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