{"id":35064,"date":"2023-06-18T19:38:55","date_gmt":"2023-06-18T16:38:55","guid":{"rendered":"https:\/\/4vultures.org\/?p=35064"},"modified":"2025-05-05T15:46:50","modified_gmt":"2025-05-05T12:46:50","slug":"how-release-strategies-affect-survival-and-home-range-stability-a-study-with-griffon-vultures-translocated-to-sardinia","status":"publish","type":"post","link":"https:\/\/4vultures.org\/pt\/blog\/how-release-strategies-affect-survival-and-home-range-stability-a-study-with-griffon-vultures-translocated-to-sardinia\/","title":{"rendered":"How release strategies affect survival and home range stability: a study with Griffon Vultures translocated to Sardinia"},"content":{"rendered":"<p>Num <a href=\"https:\/\/doi.org\/10.1016\/j.isci.2023.106699\">recently published article<\/a>, researchers analysed the home range stability and survival of 38 <a href=\"https:\/\/4vultures.org\/pt\/vultures\/griffon-vulture\/\">Griffon Vultures<\/a> (<em>Gyps fulvus<\/em>) that have been translocated to Sardinia and released following different strategies. The study sheds light on the need to monitor post-release movements, to understand the adaptability and behaviour of released individuals and make informed decisions in future reintroduction efforts.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"679\" src=\"http:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vultures-feeding-in-Sardinia_LIFE-Safe-for-Vultures-1024x679.png\" alt=\"Griffon Vulture in Sardinia feeding_LIFE Safe for Vultures\" class=\"wp-image-21789\" srcset=\"https:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vultures-feeding-in-Sardinia_LIFE-Safe-for-Vultures-1024x679.png 1024w, https:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vultures-feeding-in-Sardinia_LIFE-Safe-for-Vultures-300x199.png 300w, https:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vultures-feeding-in-Sardinia_LIFE-Safe-for-Vultures-768x509.png 768w, https:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vultures-feeding-in-Sardinia_LIFE-Safe-for-Vultures-1536x1018.png 1536w, https:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vultures-feeding-in-Sardinia_LIFE-Safe-for-Vultures.png 1596w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Griffon Vultures feeding \u00a9 LIFE Safe for Vultures<\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Translocating Griffon Vultures to strengthen the Sardinian Griffon Vulture population<\/h4>\n\n\n\n<p>Until the late 1940s, Griffon Vultures were a common sight in Sardinia. Dispersed across the island with an estimated population of 800-1200 individuals, after the Second World War, the population reduced drastically, confining the last breeding colony to the north-western area of the island. In 2013, there were only 130 individuals left! As the last autochthonous colony of the species in Italy, conservation measures started in 2015 with the <a href=\"http:\/\/www.lifeundergriffonwings.eu\/it\/index.html\" target=\"_blank\" rel=\"noreferrer noopener\">Life Under Griffon Wings<\/a> to boost the locally endangered population and <a href=\"https:\/\/4vultures.org\/pt\/our-work\/reintroduction-and-restocking\/griffon-vulture-sardinia\/\">secure a future for Griffon Vultures in Sardinia<\/a>. Over 60 Griffon Vultures were translocated from Spain, Holland and other countries and released following three strategies.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"683\" data-id=\"22216\" src=\"https:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vulture-Restocking-in-Sardinia-Release-in-Monte-Minerva-6th-of-Juin-2018--1024x683.jpeg\" alt=\"Releasing Griffon Vultures i n June 2018 at Monte Minerva, Sardinia, as part of restocking efforts \u00a9 LIFE Under Griffon Wings\" class=\"wp-image-22216\" srcset=\"https:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vulture-Restocking-in-Sardinia-Release-in-Monte-Minerva-6th-of-Juin-2018--1024x683.jpeg 1024w, https:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vulture-Restocking-in-Sardinia-Release-in-Monte-Minerva-6th-of-Juin-2018--300x200.jpeg 300w, https:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vulture-Restocking-in-Sardinia-Release-in-Monte-Minerva-6th-of-Juin-2018--768x512.jpeg 768w, https:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vulture-Restocking-in-Sardinia-Release-in-Monte-Minerva-6th-of-Juin-2018--1536x1024.jpeg 1536w, https:\/\/4vultures.org\/wp-content\/uploads\/2022\/01\/Griffon-Vulture-Restocking-in-Sardinia-Release-in-Monte-Minerva-6th-of-Juin-2018-.jpeg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">Releasing Griffon Vultures in June 2018 at Monte Minerva, Sardinia, as part of restocking efforts \u00a9 LIFE Under Griffon Wings<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"640\" data-id=\"4006\" src=\"https:\/\/4vultures.org\/wp-content\/uploads\/2021\/03\/griffon-vulture-sardinia-1440x900-1-1024x640.jpg\" alt=\"\" class=\"wp-image-4006\" srcset=\"https:\/\/4vultures.org\/wp-content\/uploads\/2021\/03\/griffon-vulture-sardinia-1440x900-1-1024x640.jpg 1024w, https:\/\/4vultures.org\/wp-content\/uploads\/2021\/03\/griffon-vulture-sardinia-1440x900-1-300x188.jpg 300w, https:\/\/4vultures.org\/wp-content\/uploads\/2021\/03\/griffon-vulture-sardinia-1440x900-1-768x480.jpg 768w, https:\/\/4vultures.org\/wp-content\/uploads\/2021\/03\/griffon-vulture-sardinia-1440x900-1.jpg 1440w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Soft or hard release strategies?<\/h4>\n\n\n\n<p>Hard release involves the direct and immediate release without an acclimatisation period, and it is mainly used with vultures that have been rehabilitated in Wildlife Rescue Centres. The soft release strategy foresees a temporary period of enclosure in acclimatisation aviaries, which can be short (around three months) or long (15 months).<em> <\/em>Authors analysed the spatial behaviour and mortality of 38 Griffon Vultures released between 2016 and 2021 in a common study area: 10 individuals that had been recovered from the wild, rehabilitated and subject to a hard release, 21 were released after a short acclimatisation period and s7 released after spending 14 months in the acclimatisation aviary. Before the release in Sardinia, each Griffon Vulture was fitted with a GPS transmitter, which provided information about their movements and dispersion. <\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" data-id=\"20599\" src=\"https:\/\/4vultures.org\/wp-content\/uploads\/2021\/11\/Griffon-Vultures-release-in-Sardinia_Mauro-Sanna-3.png\" alt=\"Griffon Vultures release in Sardinia_Mauro Sanna 2\" class=\"wp-image-20599\" \/><figcaption class=\"wp-element-caption\">GPS transmitter on a Griffon Vultures releases in Sardinia \u00a9 Mauro Sanna<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"832\" height=\"1024\" data-id=\"35067\" src=\"https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-3-832x1024.png\" alt=\"\" class=\"wp-image-35067\" srcset=\"https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-3-832x1024.png 832w, https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-3-244x300.png 244w, https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-3-768x946.png 768w, https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-3-10x12.png 10w, https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-3.png 977w\" sizes=\"(max-width: 832px) 100vw, 832px\" \/><figcaption class=\"wp-element-caption\">Map of the study area, representing release sites (circles, \u2018\u2018LA\u2019\u2019 = \u2018\u2018long acclimatization\u2019\u2019, \u2018\u2018SA\u2019\u2019 = \u2018\u2018short acclimatization\u2019\u2019,\n\u2018\u2018NA\u2019\u2019 = \u2018\u2018no acclimatization\u2019\u2019 \u00a9 Fozzi, Ilaria et al.<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Soft release strategies proved more effective in survival rates and home range stability<\/h4>\n\n\n\n<p>According to the authors, soft release strategies seem to have various potential advantages. In the acclimatisation enclosures, Griffon Vultures can get familiarised with their surrounding environment and \u201cdevelop partial cognitive maps, an important component of spatial orientation\u201d. In addition, as gregarious species, individuals can socialise with conspecifics and create bonds that could help facilitate their integration into social groups upon release. <\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>\u201cThe number of individuals that reached sexual maturity was higher (71.4%) in long-acclimatised griffons than in short-acclimatized ones (40%) or in griffons that were hard released (28.6%). Soft release<\/em> <em>with a long acclimatisation period seems to be the most successful method to ensure stable home ranges and the survival of griffon vultures.\u201d<\/em><\/p>\n<\/blockquote>\n\n\n\n<p>Nonetheless, authors suggest hard release strategies can be effective as complementary measures, as they can be essential in educating and informing the general public.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"952\" height=\"954\" src=\"http:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-2.png\" alt=\"\" class=\"wp-image-35065\" srcset=\"https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-2.png 952w, https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-2-300x300.png 300w, https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-2-150x150.png 150w, https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-2-768x770.png 768w, https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/image-2-12x12.png 12w\" sizes=\"(max-width: 952px) 100vw, 952px\" \/><figcaption class=\"wp-element-caption\">Results of the study \u00a9 Fozzi, Ilaria et al. <a href=\"https:\/\/doi.org\/10.1016\/j.isci.2023.106699\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/doi.org\/10.1016\/j.isci.2023.106699<\/a><\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Continued efforts to strengthen the locally endangered Griffon Vulture population in Sardinia<\/h4>\n\n\n\n<p><a href=\"https:\/\/4vultures.org\/pt\/blog\/life-safe-for-vultures-new-project-reinforces-griffon-vulture-population-in-sardinia\/\" target=\"_blank\" rel=\"noreferrer noopener\">LIFE Safe for Vultures<\/a>\u00a0is a new project co-financed by the\u00a0<a href=\"https:\/\/cinea.ec.europa.eu\/life_en\" target=\"_blank\" rel=\"noreferrer noopener\">EU\u2019s LIFE Programme<\/a>, which builds on the work of the successful\u00a0<a href=\"http:\/\/www.lifeundergriffonwings.eu\/it\/index.html\" target=\"_blank\" rel=\"noreferrer noopener\">LIFE Under Griffon Wings<\/a>, with the ultimate objective for Griffon Vultures to regain their historical ranges and distribution areas from the central-eastern part of Sardinia to the south and at the same time promote the long-term survival of the species on the island.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"436\" height=\"268\" data-id=\"19993\" src=\"https:\/\/4vultures.org\/wp-content\/uploads\/2021\/09\/LIFE-Safe-for-Vultures-logo.png\" alt=\"LIFE Safe for Vultures logo\" class=\"wp-image-19993\" srcset=\"https:\/\/4vultures.org\/wp-content\/uploads\/2021\/09\/LIFE-Safe-for-Vultures-logo.png 436w, https:\/\/4vultures.org\/wp-content\/uploads\/2021\/09\/LIFE-Safe-for-Vultures-logo-300x184.png 300w\" sizes=\"(max-width: 436px) 100vw, 436px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"670\" height=\"335\" data-id=\"35068\" src=\"https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/life-under-griffon-wings-logo.jpeg\" alt=\"\" class=\"wp-image-35068\" srcset=\"https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/life-under-griffon-wings-logo.jpeg 670w, https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/life-under-griffon-wings-logo-300x150.jpeg 300w, https:\/\/4vultures.org\/wp-content\/uploads\/2023\/06\/life-under-griffon-wings-logo-18x9.jpeg 18w\" sizes=\"(max-width: 670px) 100vw, 670px\" \/><\/figure>\n<\/figure>\n\n\n\n<p>The project team is working on expanding the network of farm feeding stations, creating several anti-poison dog units to tackle wildlife poisoning, establishing an additional feeding station in the south of the island, restocking the population by importing 40 additional Griffon Vultures and reducing the threat of collision and electrocution with energy infrastructures. Earlier this year, <a href=\"https:\/\/4vultures.org\/pt\/blog\/restocking-the-griffon-vulture-guild-in-sardinia-12-juveniles-from-spain-have-just-arrived\/\">12 Griffon Vultures imported from Spanish recovery centres arrived<\/a> in Sardinia and are currently in the acclimatisation aviary in Villasalto. The\u00a0<a href=\"https:\/\/en.uniss.it\/\" target=\"_blank\" rel=\"noreferrer noopener\">University of Sassari<\/a>\u00a0leads the project in collaboration with\u00a0<a href=\"https:\/\/www.sardegnaforeste.it\/\" target=\"_blank\" rel=\"noreferrer noopener\">Agenzia Regionale Forestas<\/a>,\u00a0<a href=\"http:\/\/www.sardegnaambiente.it\/corpoforestale\/\" target=\"_blank\" rel=\"noreferrer noopener\">Sardegna Corpo Forestale<\/a>,\u00a0<a href=\"https:\/\/www.e-distribuzione.it\/\" target=\"_blank\" rel=\"noreferrer noopener\">E-Distribuzione<\/a>\u00a0and the\u00a0<a href=\"https:\/\/4vultures.org\/pt\/\" target=\"_blank\" rel=\"noreferrer noopener\">Vulture Conservation Foundation.<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/4vultures.org\/wp-content\/uploads\/2021\/09\/LIFE-SAFE-for-VULTURES-project-partner-funder-logos-1024x171.png\" alt=\"LIFE SAFE for VULTURES project partner funder logos\" class=\"wp-image-20238\" width=\"786\" height=\"131\" srcset=\"https:\/\/4vultures.org\/wp-content\/uploads\/2021\/09\/LIFE-SAFE-for-VULTURES-project-partner-funder-logos-1024x171.png 1024w, https:\/\/4vultures.org\/wp-content\/uploads\/2021\/09\/LIFE-SAFE-for-VULTURES-project-partner-funder-logos-300x50.png 300w, https:\/\/4vultures.org\/wp-content\/uploads\/2021\/09\/LIFE-SAFE-for-VULTURES-project-partner-funder-logos-768x128.png 768w, https:\/\/4vultures.org\/wp-content\/uploads\/2021\/09\/LIFE-SAFE-for-VULTURES-project-partner-funder-logos-1536x256.png 1536w, https:\/\/4vultures.org\/wp-content\/uploads\/2021\/09\/LIFE-SAFE-for-VULTURES-project-partner-funder-logos-2048x341.png 2048w\" sizes=\"(max-width: 786px) 100vw, 786px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p>Source: <strong>Insights on the best release strategy from post-release movements and mortality patterns in an avian scavenger<\/strong> (2023). Ilaria Fozzi, Rudy Brogi, Silvia Cavazza, Roberta Chirichella, Davide De Rosa, Mauro Aresu,J acopo Cerri, Marco Apollonio, Fiammetta Berlinguer. <a href=\"https:\/\/doi.org\/10.1016\/j.isci.2023.106699\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/doi.org\/10.1016\/j.isci.2023.106699<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>In a recently published article, researchers analysed the home range stability and survival of 38 Griffon Vultures (Gyps fulvus) that have been translocated to Sardinia and released following different strategies. The study sheds light on the need to monitor post-release movements, to understand the adaptability and behaviour of released individuals and make informed decisions in [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":21789,"comment_status":"closed","ping_status":"closed","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 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[10],"tags":[16,145,210,30,178],"class_list":["post-35064","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-griffonvulture","tag-griffonvulturesardinia","tag-monitoringmovements","tag-research","tag-sardinia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How release strategies affect survival and home range stability: a study with Griffon Vultures translocated to Sardinia - Vulture Conservation Foundation<\/title>\n<meta name=\"description\" content=\"A study recently published analysed how soft and hard release strategies affect survival and home range stability\" \/>\n<meta name=\"robots\" content=\"index, follow, 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