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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">fish</journal-id><journal-title-group><journal-title xml:lang="ru">Вопросы рыбного хозяйства Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Belarus Fish Industry Problems</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2218-7456</issn><publisher><publisher-name>Институт рыбного хозяйства</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">fish-205</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>ЭКОЛОГИЧЕСКИЕ АСПЕКТЫ ВНУТРЕННИХ ВОДОЕМОВ</subject></subj-group></article-categories><title-group><article-title>Оценка численности молоди лососевых видов рыб и использования ими бобровых прудов в качестве нагульных водоемов в нерестовых лососевых водотоках Беларуси</article-title><trans-title-group xml:lang="en"><trans-title>Estimation of salmon species tiny fishes quantity and using of beaver ponds by them as fattening water bodies in spawning salmon waterways of the Republic Belarus</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лещенко</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Lesсhenko</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>220072, Минск, ул. Академическая, 27.</p></bio><bio xml:lang="en"><p>Minsk.</p></bio><email xlink:type="simple">andreyleshch@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Плюта</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pljuta</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>220072, Минск, ул. Академическая, 27.</p></bio><bio xml:lang="en"><p>Minsk.</p></bio><email xlink:type="simple">andreyleshch@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>НПЦ НАН Беларуси по биоресурсам</institution></aff><aff xml:lang="en"><institution>State scientific and production amalgamation «The scientific and practical center for the National Academy of Sciences of Belarus for biological resources»</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2013</year></pub-date><pub-date pub-type="epub"><day>24</day><month>02</month><year>2022</year></pub-date><volume>0</volume><issue>29</issue><fpage>232</fpage><lpage>242</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Лещенко В.А., Плюта М.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Лещенко В.А., Плюта М.В.</copyright-holder><copyright-holder xml:lang="en">Lesсhenko A.V., Pljuta M.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://fish.belal.by/jour/article/view/205">https://fish.belal.by/jour/article/view/205</self-uri><abstract><p>Установлено, что плотность молоди кумжи составила в ручье Тартак от 37 до 70 экземпляров на 100 метров русла, в реке Кимелина 9-10 экземпляров, в реке Дудка – от 2 до 5, в реке Сенканка – 1-3 экземпляра. По возрастному составу в 2010 году доминировали двухлетки, в 2011 – сеголетки, что, по-видимому, связано с низкой урожайностью молоди в 2010 году. Бобровые пруды в некоторой степени являются нагульными водоемами для молоди лососевых, преимущественно в возрасте двух и трех лет, однако, плотность молоди в естественном русле в 2-7 раз выше, чем в бобровых прудах.</p></abstract><trans-abstract xml:lang="en"><p>It was ascertained that the density of bulltrout (salmon trout) tiny fishes made in the stream of Tartak from 37 to 70 individuals per 100 meters of watercourse, in the river Kimelina of 9-10 individuals, in the river of Dudka from 2 to 5, in the river Senkanka – 1-3 individuals. In terms of age in 2010 two year old fishes were predominating, 2011 – one year old fishes that apparently is attributed to low productivity of young fishes in 2010. Beaver ponds to some extent appear to be fattening water reservoirs for salmon tiny fishes mainly for the age of two and three years old, the density of tiny fishes in natural river bed is 2–7 times higher against the beaver ponds.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>рыбы</kwd><kwd>речной бобр</kwd><kwd>плотины</kwd><kwd>бобровые пруды</kwd><kwd>лососевые</kwd><kwd>нерест</kwd><kwd>нерестовые водотоки</kwd><kwd>кумжа</kwd><kwd>семга</kwd><kwd>молодь лососевых</kwd></kwd-group><kwd-group xml:lang="en"><kwd>fishes</kwd><kwd>river beaver</kwd><kwd>dam</kwd><kwd>beaver ponds</kwd><kwd>salmon fishes</kwd><kwd>spawning</kwd><kwd>spawning watercourses</kwd><kwd>Brown trout</kwd><kwd>Atlantic salmon</kwd><kwd>salmon tiny fishes</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Правдин И.Ф. Руководство по изучению рыб / И.Ф. 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