{"id":59879,"date":"2007-12-07T00:00:00","date_gmt":"2007-12-07T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/ecologa%c2%ada-trofica-de-los-peces-en-lagunas-someras-y-su-efecto-sobre-el-epifiton-de-las-plantas\/"},"modified":"2007-12-07T00:00:00","modified_gmt":"2007-12-07T00:00:00","slug":"ecologa%c2%ada-trofica-de-los-peces-en-lagunas-someras-y-su-efecto-sobre-el-epifiton-de-las-plantas","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ecologia-animal\/ecologa%c2%ada-trofica-de-los-peces-en-lagunas-someras-y-su-efecto-sobre-el-epifiton-de-las-plantas\/","title":{"rendered":"Ecolog\u00eda tr\u00f3fica de los peces en lagunas someras y su efecto sobre el epifiton de las plantas."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Saul Blanco Lanza <\/strong><\/h2>\n<p>El presente trabajo est\u00e1 basado en cinco art\u00edculos de investigaci\u00f3n sobre diferentes aspectos de la ecolog\u00eda tr\u00f3fica de los peces en varios lagos someros. Se ha estudiado experimentalmente la ecolog\u00eda tr\u00f3fica de chondrostoma arcasii, especie end\u00e9mica de la pen\u00ednsula ib\u00e9rica, y tambi\u00e9n de la especie introducida gambusia holbrooki, a trav\u00e9s de experimentos bifactoriales en mesocosmos llevados a cabo en dos lagos someros con diferentes concentraciones de nutrientes y densidades poblacionales de peces. Los resultados muestran que para c. Arcasii, la turbidez del agua se mantuvo alta en los tratamientos con peces, pero decreci\u00f3 en los mesocosmos con concentraciones altas de nutrientes debido a la proliferaci\u00f3n de las poblaciones de clad\u00f3ceros. Esta especie mostr\u00f3 una dieta generalista con una importante contribuci\u00f3n de componentes no planct\u00f3nicos. Se observ\u00f3 igualmente un cambio dietario ontog\u00e9nico hacia el bento-detritivorismo. La proporci\u00f3n de zooplancton en los contenidos digestivos aument\u00f3 con los aportes de nutrientes. C. Arcasii seleccion\u00f3 a los clad\u00f3ceros sobre los cop\u00e9podos y rot\u00edferos. Algunos mesocosmos con peces mostraron transparencia del agua, probablemente debido a alteraciones fisiol\u00f3gicas relacionadas con altas concentraciones de amonio. Para g. Holbrooki, los resultados confirmaron que se trata de una especie planct\u00edvora y omnivora, incorporando a su dieta tambi\u00e9n algas y detritus. La adici\u00f3n de nutrientes pr\u00e1cticamente no caus\u00f3 cambios en los h\u00e1bitos alimenticios de esta especie, pero un aumento en la densidad poblacional de individuos conllev\u00f3 un cambio del detritivorismo hacia el zooplanctivorismo. En presencia de macr\u00f3fitos sumergidos, la depredaci\u00f3n se concentr\u00f3 en el zooplancton planct\u00f3nico y en el asociado a las plantas, en su ausencia aument\u00f3 la depredaci\u00f3n sobre los macroinvertebrados bent\u00f3nicos. Las hembras depredaron sobretodo tipo de presas, incluyendo tambi\u00e9n detritus. La dieta de los machos y los ju<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Ecolog\u00eda tr\u00f3fica de los peces en lagunas someras y su efecto sobre el epifiton de las plantas.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Ecolog\u00eda tr\u00f3fica de los peces en lagunas someras y su efecto sobre el epifiton de las plantas. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Saul Blanco Lanza <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Le\u00f3n<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 12\/07\/2007<\/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>Margarita Fern\u00e1ndez Al\u00e1ez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  Pena \u00e1lvarez Jos\u00e9 Carlos <\/li>\n<li>Carlos Alcaraz cazorla (vocal)<\/li>\n<li> Celada valladares Jes\u00fas domingo (vocal)<\/li>\n<li>Antonio Sanz brau (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Saul Blanco Lanza El presente trabajo est\u00e1 basado en cinco art\u00edculos de investigaci\u00f3n sobre diferentes aspectos 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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