{"id":30313,"date":"2022-01-31T10:54:38","date_gmt":"2022-01-31T15:54:38","guid":{"rendered":"https:\/\/adf-magazine.com\/?p=30313"},"modified":"2022-01-31T10:54:38","modified_gmt":"2022-01-31T15:54:38","slug":"satelite-regista-numero-de-elefantes-a-partir-da-orbita-terrestre","status":"publish","type":"post","link":"https:\/\/adf-magazine.com\/pt-pt\/2022\/01\/satelite-regista-numero-de-elefantes-a-partir-da-orbita-terrestre\/","title":{"rendered":"Sat\u00e9lite Regista N\u00famero de Elefantes A Partir da Orbita Terrestre"},"content":{"rendered":"

NOT\u00cdCIAS DA BBC EM BBC.CO.UK\/NEWS<\/p>\n

\u00c0 primeira vista, as imagens de sat\u00e9lite parecem manchas cinzentas numa floresta de manchas verdes. Por\u00e9m, um olhar mais atento mostra que essas manchas s\u00e3o elefantes a caminhar entre as \u00e1rvores. Os cientistas est\u00e3o a utilizar estas imagens para contar o n\u00famero de elefantes a partir do espa\u00e7o.<\/p>\n

As imagens s\u00e3o provenientes de um sat\u00e9lite de observa\u00e7\u00e3o da Terra que est\u00e1 em \u00f3rbita a 600 quil\u00f3metros do planeta. Este avan\u00e7o tecnol\u00f3gico pode permitir a an\u00e1lise dos 5.000 quil\u00f3metros quadrados de habitat dos elefantes num \u00fanico dia sem nuvens.<\/p>\n

A contagem exaustiva dos elefantes \u00e9 efectuada atrav\u00e9s de um algoritmo inform\u00e1tico treinado para identificar elefantes em v\u00e1rios contextos.<\/p>\n

\u201cN\u00f3s mostramos os exemplos ao algoritmo e indicamos o seguinte: \u2018Isto \u00e9 um elefante; isto n\u00e3o \u00e9 um elefante\u2019,\u201d afirmou a Dra. Olga Isupova, da Universidade de Bath, Inglaterra. \u201cDeste modo, podemos treinar a m\u00e1quina para reconhecer pormenores que n\u00e3o seriam poss\u00edvel captar a olho nu.\u201d<\/p>\n

Inicialmente, os cientistas consideraram o Parque Nacional dos Elefantes de Addo, na \u00c1frica do Sul.<\/p>\n

\u201cTem uma elevada densidade de elefantes,\u201d afirmou a Dra. Isla Duporge, uma cientista de conserva\u00e7\u00e3o da natureza a trabalhar na Universidade de Oxford. \u201cAl\u00e9m disso, tem \u00e1reas de florestas e savanas abertas, pelo que \u00e9 um excelente local para ensaiar o nosso m\u00e9todo.\u201d<\/p>\n

Os conservacionistas ter\u00e3o de pagar pelo acesso a sat\u00e9lites comerciais e pelas imagens captadas. No entanto, esta abordagem pode melhorar consideravelmente o controlo das popula\u00e7\u00f5es de elefantes amea\u00e7ados em habitats que atravessam fronteiras, onde pode ser dif\u00edcil obter autoriza\u00e7\u00e3o para levantamentos a\u00e9reos. Os cientistas afirmam tamb\u00e9m que podem ser utilizados para o combate aos ca\u00e7adores furtivos.<\/p>\n","protected":false},"excerpt":{"rendered":"

NOT\u00cdCIAS DA BBC EM BBC.CO.UK\/NEWS \u00c0 primeira vista, as imagens de sat\u00e9lite parecem manchas cinzentas numa floresta de manchas verdes. Por\u00e9m, um olhar mais atento mostra que essas manchas s\u00e3o elefantes a caminhar entre as \u00e1rvores. Os cientistas est\u00e3o a utilizar estas imagens para contar o n\u00famero de elefantes a partir do espa\u00e7o. As imagens<\/p>\n","protected":false},"author":1,"featured_media":29125,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[342,335],"tags":[],"class_list":{"0":"post-30313","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-caminhos-da-esperanca","8":"category-colunas"},"acf":[],"yoast_head":"\nSat\u00e9lite Regista N\u00famero de Elefantes A Partir da Orbita Terrestre - Africa Defense Forum<\/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:\/\/adf-magazine.com\/2021\/12\/satellite-tallies-elephants-from-orbiting-perch\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sat\u00e9lite Regista N\u00famero de Elefantes A Partir da Orbita Terrestre - Africa Defense Forum\" \/>\n<meta property=\"og:description\" content=\"NOT\u00cdCIAS DA BBC EM BBC.CO.UK\/NEWS \u00c0 primeira vista, as imagens de sat\u00e9lite parecem manchas cinzentas numa floresta de manchas verdes. 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