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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">RUDN Journal of Agronomy and Animal Industries</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Agronomy and Animal Industries</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Агрономия и животноводство</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-797X</issn><issn publication-format="electronic">2312-7988</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">19511</article-id><article-id pub-id-type="doi">10.22363/2312-797X-2019-14-3-255-265</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Veterinary science</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Ветеринария</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">Assessment of vital organ histopathology and plasma oxidative conditions of rainbow trout Oncorhynchus mykiss reared in earthen saltwater pond</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка гистопатологии жизненно важных органов и условий окислительных процессов цитоплазмы радужной форели Oncorhynchus mykiss, выращенной в глиняном пруду с морской водой</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Hoseini</surname><given-names>Seyyed Morteza</given-names></name><name xml:lang="ru"><surname>Хосейни</surname><given-names>Сейед Мортеза</given-names></name></name-alternatives><bio xml:lang="en"><p>Assistant professor, Head of stock rehabilitation devision</p></bio><bio xml:lang="ru"><p>доцент, руководитель отдела по восстановлению запасов</p></bio><email>seyyedmorteza.hoseini@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gharavi</surname><given-names>Behrooz</given-names></name><name xml:lang="ru"><surname>Гарави</surname><given-names>Белруз</given-names></name></name-alternatives><bio xml:lang="en"><p>Researcher assistant, Head of aquatic animal health ad disease group</p></bio><bio xml:lang="ru"><p>научный сотрудник, руководитель группы по защите здоровья водных животных</p></bio><email>seyyedmorteza.hoseini@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Iri</surname><given-names>Yousef</given-names></name><name xml:lang="ru"><surname>Ири</surname><given-names>Юсеф</given-names></name></name-alternatives><bio xml:lang="en"><p>Researcher assistant, Head of fisheries research station of Gharasoo</p></bio><bio xml:lang="ru"><p>научный сотрудник, начальник научно-исследовательской станции рыболовства в Гарасоо</p></bio><email>seyyedmorteza.hoseini@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Inland Waters Aquatic Resources Research Center, Iranian Fisheries Sciences Research Institute, Agricultural Research, Education and Extension Organization</institution></aff><aff><institution xml:lang="ru">Центр изучения ресурсов гидробионтов во внутренних водах, Иранский институт изучения рыбного хозяйства, Организация сельскохозяйственных исследований и образования</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2019-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2019</year></pub-date><volume>14</volume><issue>3</issue><issue-title xml:lang="en">VOL 14, NO3 (2019)</issue-title><issue-title xml:lang="ru">ТОМ 14, №3 (2019)</issue-title><fpage>255</fpage><lpage>265</lpage><history><date date-type="received" iso-8601-date="2019-10-03"><day>03</day><month>10</month><year>2019</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Hoseini S.M., Gharavi B., Iri Y.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Хосейни С.М., Гарави Б., Ири Ю.</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Hoseini S.M., Gharavi B., Iri Y.</copyright-holder><copyright-holder xml:lang="ru">Хосейни С.М., Гарави Б., Ири Ю.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://agrojournal.rudn.ru/agronomy/article/view/19511">https://agrojournal.rudn.ru/agronomy/article/view/19511</self-uri><abstract xml:lang="en"><p>The aim of this study was to compare gill, kidney, liver and gut histopathology, and plasma antioxidant markers of rainbow trout Oncorhynchus mykiss reared in saltwater earthen ponds in Gomishan, Iran. To this, 10000 fish were distributed in a three-ha earthen pond and 150 fish in three fiberglass tanks (2000L). Blood samples were taken after 3 months rearing with same commercial feed. The source of fish and feed was similar between the saltwater pond and fiberglass tanks. After the 3-month rearing, gill, kidney, liver and gut samples were taken from the pond fish; whereas, blood samples were taken from both the pond and tank fish. There was no significant difference in water temperature, dissolved oxygen and pH between the pond and tanks; however, water salinity and ammonia was higher in the pond compared to the tanks. Plasma superoxide dismutase and glutathione peroxidase activity of the fish in earthen ponds were significantly higher than those fish reared in fiberglass tanks; however, there was no significant in thiobarbituric acid reactive substances between the pond and tanks. The fish had various histopathological symptoms including primary and lamella hyperplasia, lamellar fusion and epithelial lifting. In the kidney section, the fish showed glomerulus shrinkage and/or disappearance, melanomacrophage aggregates and hematopoietic tissue necrosis. These fish showed necrosis and melanomacrophage aggregates in liver and goblet cell hypertrophy in gut. The results suggest that the fish in the earthen pond faced stressful conditions, which might be due to water salinity and ammonia; however, other possible factors, such as pollutants and different feeding regimen must be considered.</p></abstract><trans-abstract xml:lang="ru"><p>Цель данного исследования заключалась в сравнении гистопатологий жабр, почек, печени и кишечника, и оценке активности системы антиоксидантной защиты радужной форели ( Oncorhynchus mykiss ), выращенной в глиняных прудах с морской водой в г. Гомишан в Иране. Для этого в глиняный пруд площадью 3 га поместили 10000 особей и 150 рыб распределили в трех резервуарах из стекловолокна (2000 л). Форель выращивали в течение трех месяцев, после чего у рыб, культивируемых в пруду и резервуарах, были взяты образцы крови, в то время как образцы тканей жабр, почек, печени и кишечника были взяты для гистологического анализа только у прудовых рыб. Температура воды, содержание растворенного в воде кислорода и значение pH в пруду и резервуарах имели несущественные различия; однако такие параметры как соленость воды и содержание аммиака имели более высокие показатели в пруду. Активность цитоплазматической супероксиддисмутазы и глутатионпероксидазы у рыб, культивируемых в глиняных прудах, была значительно выше по сравнению с особями, выращенными в стекловолоконных резервуарах. Тем не менее, между прудом и резервуарами не было значительной разницы по количеству веществ, реагирующих с тиобарбитуровой кислотой. После проведения гистологического анализа у рыб были выявлены такие патоморфологические изменения как первичная гиперплазия ламелл, слияние ламелл и эпителиальный лифтинг. На поперечном сечении почек у рыб наблюдали сморщивание или исчезновение клубочков, скопления меланомакрофагов и некроз гемопоэтической ткани. Кроме того, у этих рыб были обнаружены следы некрозов и скопления меланомакрофагов в печени, а также гипертрофия бокаловидных клеток кишечника. Результаты исследований показывают, что в глиняном пруду рыба оказалась под воздействием стрессовых факторов, среди которых могут быть параметры солености воды и содержания аммиака. Но необходимо учитывать и другие возможные причины, например, загрязняющие вещества и различные режимы кормления.</p></trans-abstract><kwd-group xml:lang="en"><kwd>trout</kwd><kwd>earthen pond</kwd><kwd>antioxidant system</kwd><kwd>saltwater</kwd><kwd>histopathology</kwd><kwd>Gomishan</kwd><kwd>Iran</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>форель</kwd><kwd>глиняный пруд</kwd><kwd>система антиоксидантной защиты</kwd><kwd>морская вода</kwd><kwd>гистопатология</kwd><kwd>Гомишан</kwd><kwd>Иран</kwd></kwd-group><funding-group><award-group><award-id></award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Hoseini SM, Kor A, Gharavi B, Iri Y. Investigation of immunological characteristics of rainbow trout in Gomishan saltwater ponds with those reared in freshwater. Journal of aquatic animal exploitation and rearing. 2019; 8:41—46. 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