{"id":65054,"date":"2024-07-03T06:43:50","date_gmt":"2024-07-03T09:43:50","guid":{"rendered":"https:\/\/www.mundoacuicola.cl\/new\/?p=65054"},"modified":"2024-07-04T09:45:33","modified_gmt":"2024-07-04T12:45:33","slug":"investigacion-analizo-fauna-enteroparasitaria-del-salmon-chinook","status":"publish","type":"post","link":"https:\/\/www.mundoacuicola.cl\/new\/investigacion-analizo-fauna-enteroparasitaria-del-salmon-chinook\/","title":{"rendered":"Investigaci\u00f3n analiz\u00f3 fauna enteropar\u00e1sitaria del salm\u00f3n Chinook"},"content":{"rendered":"<p><span style=\"font-weight: 400;\"><b><span lang=\"es-CL\"><span lang=\"ES-TRAD\"><a href=\"https:\/\/www.alloyingenieria.com\/\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-55815 size-full alignright\" src=\"https:\/\/www.mundoacuicola.cl\/new\/wp-content\/uploads\/2023\/09\/Gif-Alloy.gif\" alt=\"\" width=\"300\" height=\"300\" \/><\/a><\/span><\/span><\/b><\/span>Con la llegada de especies invasoras, generalmente existen cambios en el entorno. Esto es lo que sucede con el salm\u00f3n Chinook, el que ya forma parte del ecosistema. Su h\u00e1bitat natural es el hemisferio norte, sin embargo, ha sido introducido y es f\u00e1cil encontrarlo tanto en Chile, Argentina e incluso, en Nueva Zelanda. En el caso nacional, se encuentra desde el r\u00edo Imperial hasta la Patagonia.<\/p>\n<p>Marcela Figueroa obtuvo su t\u00edtulo de bi\u00f3loga marina estudiando precisamente, el \u201cEfecto Spillback\u201d de esta especie. Bajo la direcci\u00f3n de la Dra. Sara M. Rodr\u00edguez como profesora gu\u00eda, y el Dr. James E. Byers de la Universidad de Georgia, como co-gu\u00eda, la estudiante tom\u00f3 muestras que le facilitaron desde Caleta La Barra, Tolt\u00e9n para realizar el estudio, que se llev\u00f3 a cabo tanto en la Universidad Austral de Chile como en la Universidad Cat\u00f3lica de la Sant\u00edsima Concepci\u00f3n (UCSC).<\/p>\n<p>Se denomina \u201cEfecto Spillback\u201d o \u201cEfecto de derrame\u201d a la interacci\u00f3n que puede existir entre un hospedador invasor y par\u00e1sitos nativos, donde la especie invasora, en este caso el salm\u00f3n Chinook, comienza a ser un hospedador id\u00f3neo para los par\u00e1sitos nativos y por lo tanto, logran reproducirse en el invasor, lo cual puede afectar negativamente a la fauna nativa. Esto, dado que se podr\u00eda incrementar la carga infecciosa de par\u00e1sitos nativos en el ambiente.<\/p>\n<p>\u201cRealizamos un registro de los par\u00e1sitos en el salm\u00f3n Chinook. Quisimos investigar si estos par\u00e1sitos est\u00e1n descritos para el salm\u00f3n Chinook. Este salm\u00f3n fue introducido como alevines, entonces, todo lo que se puede encontrar en \u00e9l, respecto a par\u00e1sitos, han sido adquiridos en Chile\u201d, explic\u00f3 Marcela Figueroa.<\/p>\n<p>Al ser una especie invasora, puede alimentarse de especies nativas y as\u00ed, interrumpir la cadena tr\u00f3fica. Es un depredador que se alimenta de crust\u00e1ceos y otros peces. Vive de 3 a 8 a\u00f1os en el oc\u00e9ano, pese a nacer en r\u00edos. Los alevines de Chinook migran hacia al mar a los dos meses de eclosionar en r\u00edos, para alimentarse y crecer, y luego migran nuevamente hacia r\u00edos y lagos para reproducirse, donde finalmente mueren.<\/p>\n<p>Toma de muestras y resultados<\/p>\n<p><span style=\"font-weight: 400;\"><b><span lang=\"ES-TRAD\"><strong><a href=\"https:\/\/www.mundoacuicola.cl\/medios\/?url_camp=26\" target=\"_blank\" rel=\"https:\/\/www.mundoacuicola.cl\/medios\/?url_camp=26 noopener\"><img decoding=\"async\" class=\"alignleft\" src=\"https:\/\/www.mundoacuicola.cl\/medios\/?camp=26\" alt=\"\" width=\"300\" height=\"250\" \/><\/a><\/strong><\/span><\/b><\/span>En\u00a0 Caleta La Barra, Tolt\u00e9n, Marcela Figueroa logr\u00f3 conseguir muestras, espec\u00edficamente de las v\u00edsceras del salm\u00f3n Chinook, gracias a la gesti\u00f3n de Braulio Silva, presidente del Sindicato de Pescadores de la zona, y Wladimir Mu\u00f1oz. En total fueron 124 muestras las analizadas. Se identificaron 12986 par\u00e1sitos de los cuales solo 31 espec\u00edmenes correspond\u00edan a par\u00e1sitos en estado adulto, correspondientes a 24 nem\u00e1todos del g\u00e9nero Hysterothylacium, 6 digeneos del g\u00e9nero Lecithaster, y un esp\u00e9cimen del g\u00e9nero Lampritrema. En el Chinook, todos estos g\u00e9neros ya han sido descritos en otros pa\u00edses, como Nueva Zelanda, adem\u00e1s de tambi\u00e9n encontrarse como par\u00e1sitos generalistas en la fauna nativa de Chile.<\/p>\n<p>\u201cSe logr\u00f3 identificar 5 g\u00e9neros y 2 \u00f3rdenes de par\u00e1sitos. Se observaron algunos rasgos caracter\u00edsticos de los par\u00e1sitos como tambi\u00e9n estructuras reproductivas, que permitieron clasificar entre larva y adulto. Esa parte la realic\u00e9 con la Dra. Sara M. Rodr\u00edguez y el Dr. Mario George Nascimento en la UCSC\u201d, coment\u00f3.<\/p>\n<p>Para que ocurra el Efecto Spillback, debe suceder que los par\u00e1sitos de un h\u00e1bitat nativo se reproduzcan dentro del invasor. Esto no siempre se da, ya que, al ser una especie introducida, los par\u00e1sitos dependen de las condiciones que le presenta este potencial nuevo hospedador. Si bien la presencia de par\u00e1sitos adultos indica que el salm\u00f3n es un hospedador donde los g\u00e9neros Hysterothylacium, Lampritrema y Lecithaster se reproducen, se requiere de m\u00e1s investigaci\u00f3n para hablar sobre alg\u00fan impacto en la fauna nativa. Para ello, es importante evaluar qu\u00e9 tan id\u00f3neo como hospedador es el salm\u00f3n Chinook en comparaci\u00f3n a la fauna nativa.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Con la llegada de especies invasoras, generalmente existen cambios en el entorno. Esto es lo&#8230;<\/p>\n","protected":false},"author":8,"featured_media":65064,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[63],"tags":[8133,22850,16023,8403,22852,22853,22851,1262,1072,840],"class_list":["post-65054","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ciencia","tag-cadena-trofica","tag-efecto-spillback","tag-especie-invasora","tag-fauna-nativa","tag-marcela-figueroa","tag-parasitos-generalistas","tag-parasitos-nativos","tag-salmon-chinook","tag-universidad-austral-de-chile","tag-universidad-catolica-de-la-santisima-concepcion"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Investigaci\u00f3n analiz\u00f3 fauna enteropar\u00e1sitaria del salm\u00f3n Chinook - Mundoacuicola<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mundoacuicola.cl\/new\/investigacion-analizo-fauna-enteroparasitaria-del-salmon-chinook\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Investigaci\u00f3n analiz\u00f3 fauna enteropar\u00e1sitaria del salm\u00f3n Chinook - Mundoacuicola\" \/>\n<meta property=\"og:description\" content=\"Con la llegada de especies invasoras, generalmente existen cambios en el entorno. 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