{"id":82152,"date":"2000-01-01T00:00:00","date_gmt":"2000-01-01T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/efecto-del-fotoperiodo-en-la-transferencia-del-salmon-atlantico-salmo-salar-de-agua-dulce-a-agua-salada\/"},"modified":"2000-01-01T00:00:00","modified_gmt":"2000-01-01T00:00:00","slug":"efecto-del-fotoperiodo-en-la-transferencia-del-salmon-atlantico-salmo-salar-de-agua-dulce-a-agua-salada","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-agrarias\/efecto-del-fotoperiodo-en-la-transferencia-del-salmon-atlantico-salmo-salar-de-agua-dulce-a-agua-salada\/","title":{"rendered":"Efecto del fotoperiodo en la transferencia del salmon atlantico (salmo salar)  de agua dulce a agua salada."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Josefa Agra Lago <\/strong><\/h2>\n<p>En la realizaci\u00f3n de esta tesis se trabaj\u00f3 con salmones salmo salar procedentes de una piscifactor\u00eda de salmones de santalla de l\u00f3uzara (samos, lugo). Los salmones sufren un proceso de transformaci\u00f3n en agua dulce que los adapta para vivir en el agua de mar (mejora su capacidad hpoosmorreguladora). as\u00ed, los salmones pintos, redondeados y habitantes del fondo de los r\u00edos, se transforman en salmones esguines, de colaraci\u00f3n plateada y pel\u00e1gicos, y que migran hacia el agua de mar. Esta transformaci\u00f3n pinto esgu\u00edn es el conjunto de una serie de procesos independientes y que abarcan cambios en la fisiolog\u00eda, en la morfolog\u00eda y en el comportamiento. Estos cambios est\u00e1n sincronizados por factores externos tales como el fotoper\u00edodo y la temperatura, que act\u00faan sobre factores internos como el eje hipot\u00e1lamo &#8211; adenohip\u00f3fisis, y distintas hormonas como la gh y las hormonas tirpideas.  los tres factores m\u00e1s importantes para controlar la transformaci\u00f3n pinto &#8211; esgu\u00edn son que el pez haya superado un umbral de talla, que el pez pase por un per\u00edodo de d\u00edas cortos (se\u00f1al de invierno), y que pase por un per\u00edodo de d\u00edas largos (se\u00f1al de primavera). Manipulando la se\u00f1al de invierno, la se\u00f1al de primavera, o ambas, se puede adelantar el momento de la transformaci\u00f3n pinto &#8211; esgu\u00edn.  en este estudio se trabaj\u00f3 manipulando el fotoper\u00edodo para adelantar la transformaci\u00f3n pinto &#8211; esgu\u00edn.  como indicadores del grado de desarrollo de la transformaci\u00f3n pinto -esgu\u00edn se midieron los niveles de actividad na+\/k+-atp\u00e1sica branquial y los valores de ft4 y t3. la actividad atp\u00e1sica se midi\u00f3 por el m\u00e9todo de mardh, 1.975, y las hormonas tiroideas se midieron por el m\u00e9todo delfia.  tanto los valores de atpasa como los valores de ft4 aumentaron a lo largo de esta transformaci\u00f3n, mientras que los valores de t3 permanecieron estables. Los picos de actividad atp\u00e1sica y de ft4 coincidieron en todos los casos estudia<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Efecto del fotoperiodo en la transferencia del salmon atlantico (salmo salar)  de agua dulce a agua salada.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Efecto del fotoperiodo en la transferencia del salmon atlantico (salmo salar)  de agua dulce a agua salada. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Josefa Agra Lago <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Santiago de compostela<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/01\/2000<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li> Rodriguez Veira Jos\u00e9 Antonio<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Manuel alejo Aldegunde villar <\/li>\n<li> Rodriguez rodriguez Jos\u00e9 Luis (vocal)<\/li>\n<li> Andres gonzalez m. dolores (vocal)<\/li>\n<li>Miguel Alfonso balmes (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Josefa Agra Lago En la realizaci\u00f3n de esta tesis se trabaj\u00f3 con salmones salmo salar procedentes de [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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