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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">Biology Bulletin</journal-id><journal-title-group><journal-title xml:lang="en">Biology Bulletin</journal-title><trans-title-group xml:lang="ru"><trans-title>Известия Российской академии наук. Серия биологическая</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1026-3470</issn><issn publication-format="electronic">3034-5367</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">687644</article-id><article-id pub-id-type="doi">10.31857/S1026347025040112</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ECOLOGY</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ЭКОЛОГИЯ</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">Seasonal dynamics of blood parameters in Turkish hamster (Mesocricetus brandti Nehring, 1898)</article-title><trans-title-group xml:lang="ru"><trans-title>Сезонная динамика показателей крови у хомяка брандта Mesocricetus brandti Nehring, 1898</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Omarova</surname><given-names>D. K.</given-names></name><name xml:lang="ru"><surname>Омарова</surname><given-names>Д. К.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>omarovadk@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Jafarova</surname><given-names>A. M.</given-names></name><name xml:lang="ru"><surname>Джафарова</surname><given-names>А. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>omarovadk@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Chunkov</surname><given-names>M. M.</given-names></name><name xml:lang="ru"><surname>Чунков</surname><given-names>М. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>omarovadk@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Surov</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Суров</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>omarovadk@mail.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Feoktistova</surname><given-names>N. Y.</given-names></name><name xml:lang="ru"><surname>Феоктистова</surname><given-names>Н. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>omarovadk@mail.ru</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Caspian Institute of Biological Resources of the Dagestan Federal Research Center of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Прикаспийский институт биологических ресурсов Дагестанского федерального исследовательского центра РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Dagestan State University</institution></aff><aff><institution xml:lang="ru">Дагестанский государственный университет</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Федеральное государственное бюджетное учреждение науки Институт проблем экологии и эволюции им. А.Н. Северцова РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-08-04" publication-format="electronic"><day>04</day><month>08</month><year>2025</year></pub-date><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>477</fpage><lpage>488</lpage><history><date date-type="received" iso-8601-date="2025-07-16"><day>16</day><month>07</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-07-16"><day>16</day><month>07</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://medjrf.com/1026-3470/article/view/687644">https://medjrf.com/1026-3470/article/view/687644</self-uri><abstract xml:lang="en"><p>The dynamics of body weight and temperature, as well as hematological blood parameters, were carried out on 10 males of Turkish hamsters under natural temperature and photoperiod. Due to the absence of an increase in body weight in the autumn and the seasonal changes in the number of red blood cells and white blood cells, Turkish hamster can be classified as a species with facultative hibernation. At the same time, the seasonal dynamics of changes in platelet parameters is similar to that of true hibernators. According to the data obtained by thermologgers in our experiment, not a single individual demonstrated true hibernation patterns, only short-term torpors were recorded.</p></abstract><trans-abstract xml:lang="ru"><p>Исследовали динамику массы и температуры тела, а также гематологических показателей крови у 10 самцов хомяка Брандта в условиях естественного температурного и светового режима. По отсутствию увеличения массы тела в осенний период и по характеру сезонных изменений количества эритроцитов и лейкоцитов в крови хомяк Брандта может быть отнесен к видам с факультативной спячкой. В то же время сезонная динамика изменений параметров тромбоцитов сходна с таковой у истинных гибернаторов. Согласно данным, полученным при расшифровке термологгеров, в условиях нашего эксперимента ни одна особь не продемонстрировала паттернов истинной спячки, были зафиксированы лишь непродолжительные торпоры.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Turkish hamster</kwd><kwd>seasonal phenomena</kwd><kwd>body weight</kwd><kwd>blood parameters</kwd><kwd>erythrocytes</kwd><kwd>leukocytes</kwd><kwd>platelets</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>хомяк Брандта</kwd><kwd>сезонные явления</kwd><kwd>масса тела</kwd><kwd>показатели крови</kwd><kwd>эритроциты</kwd><kwd>лейкоциты</kwd><kwd>тромбоциты</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Правительство РФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">Government of the Russian Federation</institution></institution-wrap></funding-source><award-id>125020501453-2</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Ануфриев А. 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