{"id":6162,"date":"2017-01-17T00:00:00","date_gmt":"2017-01-17T00:00:00","guid":{"rendered":"http:\/\/4vultures.org\/blog\/female-egyptian-vultures-have-lower-survival-and-start-breeding-earlier-than-males-in-central-north-spain\/"},"modified":"2017-01-17T00:00:00","modified_gmt":"2017-01-17T00:00:00","slug":"female-egyptian-vultures-have-lower-survival-and-start-breeding-earlier-than-males-in-central-north-spain","status":"publish","type":"post","link":"https:\/\/4vultures.org\/es\/blog\/female-egyptian-vultures-have-lower-survival-and-start-breeding-earlier-than-males-in-central-north-spain\/","title":{"rendered":"Female Egyptian vultures have lower survival and start breeding earlier than males in Central-North Spain"},"content":{"rendered":"<div id='gallery-1' class='gallery galleryid-6162 gallery-columns-3 gallery-size-large'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/4vultures.org\/wp-content\/uploads\/2021\/03\/Bearded-Vulture-BG1057-c-Hansruedi-Weyrich-.jpg'><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/4vultures.org\/wp-content\/uploads\/2021\/03\/Bearded-Vulture-BG1057-c-Hansruedi-Weyrich--1024x576.jpg\" class=\"attachment-large size-large\" alt=\"\" srcset=\"https:\/\/4vultures.org\/wp-content\/uploads\/2021\/03\/Bearded-Vulture-BG1057-c-Hansruedi-Weyrich--1024x576.jpg 1024w, https:\/\/4vultures.org\/wp-content\/uploads\/2021\/03\/Bearded-Vulture-BG1057-c-Hansruedi-Weyrich--300x169.jpg 300w, https:\/\/4vultures.org\/wp-content\/uploads\/2021\/03\/Bearded-Vulture-BG1057-c-Hansruedi-Weyrich--768x432.jpg 768w, https:\/\/4vultures.org\/wp-content\/uploads\/2021\/03\/Bearded-Vulture-BG1057-c-Hansruedi-Weyrich-.jpg 1340w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/a>\n\t\t\t<\/div><\/figure>\n\t\t<\/div>\n\n<p> Ana Sanz-Aguilar and co-authors have research the effect of age and sex on recruitment, breeding success and adult survival of the globally endangered Egyptian vulture in North-Central Spain during 31 years.\u00a0 Their results were recently published in the journal Scientific Reports, and show that the mean age of first reproduction was 7-yrs for both sexes, but females showed tendency for earlier breeding. They also found an age-related improvement in breeding success at the population level. Perhaps most surprisingly, they found that old males (\u22658 yrs) showed a higher survival than both young males (\u22647 yrs) and females (no age effects for females on survival).<\/p>\n<p> The authors suggest that sex and age-related differences in foraging strategies and susceptibility to toxics could be behind the relatively low survival of females and young males. \u00a0The survival of female Egyptian vultures in the study population was alarmingly low in comparison with the survival rates estimated for adults breeding in other European populations \u2013 this could lead to male-skewed adult sex-ratios. Why these is so? \u00a0It is a mystery yet, as it seems that both males and females Egyptian vultures have similar home ranges both at European breeding and wintering quarters in the African Sahel regions, although \u201cit may exist differential patterns of exploitation of space in terms of microhabitat between sexes that ultimately may be behind the observed patterns and that need to be examined in detail\u201d said JA Don\u00e1zar, one of the main authors of this long term monitoring project. One possibility is that females may more frequently exploit predictable food sources, such as dumps and supplementary feeding stations, than males, and be more exposed to associated risks (e.g. poisons, pathogens and\/or toxic veterinary pharmaceutical).<\/p>\n<p> These results strengthen the importance of long term monitoring programs in long lived species conservation and particularly the significance of considering the age and the sex when studying life histories, even among monogamous species in which both sexes exhibit similar parental care.<\/p>\n<p> You can download the paper below.<\/p>\n<p> Photo Bruno Berth\u00e9my\/VCF<\/p>\n<p> <a href=\"\/es\/app\/download\/8995006185\/Sex+age+survival+Egyptian+vulture+Sanz-Aguilar+et+al+2017Scientic+Reports.pdf\/?t=1494414743\"> <img decoding=\"async\" src=\"https:\/\/assets.jimstatic.com\/s\/img\/cc\/icons\/pdf.png\" alt=\"Download\" \/> <\/a> Sex and age affect survival in the Egyptian vulture &#8211; paper Sex age survival Egyptian vulture Sanz-A Adobe Acrobat Document 574.2 KB <a href=\"\/es\/app\/download\/8995006185\/Sex+age+survival+Egyptian+vulture+Sanz-Aguilar+et+al+2017Scientic+Reports.pdf\/?t=1494414743\">Download<\/a> <\/p>","protected":false},"excerpt":{"rendered":"<p>Ana Sanz-Aguilar and co-authors have research the effect of age and sex on recruitment, breeding success and adult survival of the globally endangered Egyptian vulture in North-Central Spain during 31 years.\u00a0 Their results were recently published in the journal Scientific Reports, and show that the mean age of first reproduction was 7-yrs for both sexes, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"","ast-disable-related-posts":"","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":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[10],"tags":[15,26],"class_list":["post-6162","post","type-post","status-publish","format-standard","hentry","category-news","tag-egyptianvulture","tag-rupis"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - 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