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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">10.26428/1606-9919-2020-200-618-634</article-id><article-id custom-type="elpub" pub-id-type="custom">tinro-578</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>БИОЛОГИЧЕСКИЕ РЕСУРСЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOLOGICAL RESOURCES</subject></subj-group></article-categories><title-group><article-title>Оценка численности производителей нерки и их распределение по нерестовым стациям в бассейне Начикинского озера (Камчатка) в 2019 г.</article-title><trans-title-group xml:lang="en"><trans-title>Feldman M.G. Estimation of the number of sockeye salmon adults and their distribution by spawning stations in the basin of Lake Nachikinskoye (Kamchatka) in 2019</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>Запорожец</surname><given-names>О. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaporozhets</surname><given-names>G. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Запорожец Олег Михайлович, доктор биологических наук, ведущий научный сотрудник</p><p>683000, г. Петропавловск-Камчатский, ул. Набережная, 18 </p></bio><bio xml:lang="en"><p>Zaporozhets Oleg M., D. Biol., leading researcher</p><p>18, Naberezhnaya Str., Petropavlovsk-Kamchatsky, 683000</p></bio><email xlink:type="simple">zaporozhets.o.m@kamniro.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>Запорожец</surname><given-names>Г. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaporozhets</surname><given-names>O. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Запорожец Галина Васильевна, кандидат биологических наук, ведущий научный сотрудник</p><p>683000, г. Петропавловск-Камчатский, ул. Набережная, 18 </p></bio><bio xml:lang="en"><p>Zaporozhets Galina V., Ph.D., leading researcher</p><p>18, Naberezhnaya Str., Petropavlovsk-Kamchatsky, 683000</p></bio><email xlink:type="simple">zaporozhets.g.v@kamniro.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>Фельдман</surname><given-names>М. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Feldman</surname><given-names>M. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Фельдман Марк Геннадьевич, кандидат биологических наук, ведущий научный сотрудник</p><p>683000, г. Петропавловск-Камчатский, ул. Набережная, 18 </p></bio><bio xml:lang="en"><p>Feldman Mark G., Ph.D., leading researcher</p><p>18, Naberezhnaya Str., Petropavlovsk-Kamchatsky, 683000</p></bio><email xlink:type="simple">feldman.m.g@kamniro.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Камчатский филиал ВНИРО (КамчатНИРО)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kamchatka branch of VNIRO (KamchatNIRO)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>30</day><month>09</month><year>2020</year></pub-date><volume>200</volume><issue>3</issue><fpage>618</fpage><lpage>634</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Запорожец О.М., Запорожец Г.В., Фельдман М.Г., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Запорожец О.М., Запорожец Г.В., Фельдман М.Г.</copyright-holder><copyright-holder xml:lang="en">Zaporozhets G.V., Zaporozhets O.M., Feldman M.G.</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/578">https://izvestiya.tinro-center.ru/jour/article/view/578</self-uri><abstract><p>В 2019 Г. С помощью фотосъёмки с квадрокоптера получены данные о количественном распределении производителей ранней и поздней рас нерки в бассейне оз. Начикинского в 2019 г. Показаны и проанализированы сходство и различия нереста нерки в отдельных секторах озёрного прибрежья и в разных стациях на этой территории. Нерест по секторам проходил несинхронно — сначала на восточном побережье, а потом на западном. Рассмотрены особенности нереста поздней нерки в разнообразных стациях: на озёрных литоральных полках, на крутых береговых склонах, в ключевых лимнокренах, среди водорослевых полей на глубинах до 5 м и в речных притоках. Качественные сравнения условий нереста в этих стациях по ряду характеристик (скоростям и градиентам потоков и их температуры, концентрации кислорода, составу грунтов, воздействию хищников и волн) показали, что в каждой из них есть свои преимущества и недостатки. И хотя доминирующей стацией остаётся озёрное мелководье, это разнообразие является залогом не только устойчивости запасов поздней нерки, но и их роста. Количество нерестовавших рыб рассчитано с помощью трапециевидного приближения (методом TAUC). Численность ранней нерки оценена в 55 тыс. экз.; поздней — в 132 тыс. экз.; описано распределение рыб по нерестилищам. Представлены данные, свидетельствующие о значительном росте численности поздней расы начикинской нерки с середины прошлого века.</p></abstract><trans-abstract xml:lang="en"><p>Data on quantitative distribution of early and late spawners of sockeye salmon in the Lake Nachikinskoye basin were collected in 2019 using quadcopter. Features of sockeye spawning in certain sectors of the lake coast and at the spawning stations are analyzed. The spawning starts earlier on the eastern coast, and then on the western coast. The late sockeye spawning is considered in details at the spawning stations on littoral shelves, on steep coastal slopes, in key limnocrenes, in algae fields at the depths up to 5 m, and in the river tributaries. Environmental conditions of the stations are compared quantitatively by several parameters, as water flows and their gradients, water temperature, dissolved oxygen content, soils composition, impact of predators and waves. Each station has its advantages and disadvantages. The lake shallows dominate among the spawning grounds, but their diversity provides stability and even growth of local sockeye salmon stocks. Spatial distribution of the sockeye spawning grounds is described. The number of spawned fish is assessed using the trapezoid approximation (TAUC) as 55 . 103 ind. for early sockeye and 132 . 103 ind. for late sockeye that shows a considerable growth of the stocks of sockeye salmon in Lake Nachikinskoye since the middle of last century.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>нерка</kwd><kwd>нерест</kwd><kwd>разнообразие</kwd><kwd>квадрокоптер</kwd><kwd>фотосъёмка</kwd><kwd>учёт численности</kwd><kwd>математическое моделирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>sockeye salmon</kwd><kwd>spawning</kwd><kwd>environmental diversity</kwd><kwd>quadcopter</kwd><kwd>photo survey</kwd><kwd>fish stock assessment</kwd><kwd>mathematical modeling</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">Ардашев А.А., Подлесных А.В. Факторы нерестового периода в формировании численности тихоокеанских лососей // Вестн. 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