{"id":64740,"date":"2017-04-29T12:23:42","date_gmt":"2017-04-29T15:23:42","guid":{"rendered":"https:\/\/espacoecologico.com.br\/arquivo\/?p=64740"},"modified":"2017-04-29T12:23:44","modified_gmt":"2017-04-29T15:23:44","slug":"baleias-bebes-sussurram-para-suas-maes-para-evitar-predadores","status":"publish","type":"post","link":"https:\/\/espacoecologico.com.br\/arquivo\/baleias-bebes-sussurram-para-suas-maes-para-evitar-predadores\/","title":{"rendered":"Baleias beb\u00eas \u2018sussurram\u2019 para suas m\u00e3es para evitar predadores"},"content":{"rendered":"<p><script 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type=\"text\/javascript\"><\/script><script src=\"https:\/\/cdn.boomtrain.com\/analyticstrain\/f941f7fb036fb2836f08d8fff561b60d\/analyticstrain.min.js\" type=\"text\/javascript\"><\/script><script src=\"\/\/www.npttech.com\/advertising.js\" async=\"true\"><\/script><script src=\"https:\/\/d3r7h55ola878c.cloudfront.net\/btn\/1.0.7\/nudgespot-loader.js\" type=\"text\/javascript\"><\/script><script src=\"http:\/\/rtax.criteo.com\/delivery\/rta\/rta.js?netId=4317&amp;cookieName=crtg_rta&amp;rnd=20448204216&amp;varName=crtg_content\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/x-abril.inventorycdn.com\/js?cookie=rh_abril\" async=\"\" type=\"text\/javascript\"><\/script><script src=\"https:\/\/securepubads.g.doubleclick.net\/gpt\/pubads_impl_115.js\" async=\"\"><\/script><\/p>\n<div class=\"container main-container \">\n<div class=\"row\">\n<div class=\"col-md-8\">\n<article id=\"post-2011865\" class=\"article\">\n<section class=\"article-content\"><a href=\"https:\/\/espacoecologico.com.br\/arquivo\/baleias-bebes-sussurram-para-suas-maes-para-evitar-predadores\/baleias-7\/\" rel=\"attachment wp-att-64741\"><img loading=\"lazy\" class=\"alignleft size-medium wp-image-64741\" src=\"https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias-300x192.jpg\" alt=\"\" width=\"300\" height=\"192\" srcset=\"https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias-300x192.jpg 300w, https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias.jpg 415w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>As <strong>baleias<\/strong> jubarte ant\u00e1rticas rec\u00e9m-nascidas e suas m\u00e3es \u201csussurram\u201d umas \u00e0s outras para escapar de potenciais <strong>predadores<\/strong>, indica um estudo publicado nesta ter\u00e7a-feira no peri\u00f3dico <a href=\"http:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/1365-2435.12871\/full\" target=\"_blank\" rel=\"noopener noreferrer\"><i>Functional Ecology<\/i><\/a>, revelando a exist\u00eancia de uma t\u00e9cnica de <strong>sobreviv\u00eancia<\/strong> desconhecida at\u00e9 ent\u00e3o.<\/p>\n<p>Conhecidos por seus chamados barulhentos, usados para reunir o grupo ou para que os machos possam atrair f\u00eameas durante as \u00e9pocas de acasalamento, esses enormes mam\u00edferos evitam chamar aten\u00e7\u00e3o quando um predador est\u00e1 por perto, emitindo sons mais baixos em situa\u00e7\u00f5es de risco potencial.<\/p>\n<p>\u201cElas n\u00e3o querem nenhum ouvinte indesejado\u201d, disse Simone Videsen, autora principal do artigo e pesquisadora da Universidade de Aarhus, na Dinamarca. \u201cOs predadores potenciais, como as orcas, poderiam ouvir suas conversas e usar isso para localizar o filhote e pred\u00e1-lo\u201d.<\/p>\n<p>Videsen e sua equipe, junto com pesquisadores de universidades australianas, acompanharam oito baleias beb\u00eas e duas m\u00e3es por 24 horas no golfo de Exmouth, localizando na Austr\u00e1lia Ocidental. \u00c9 comum encontrar baleias jubarte ant\u00e1rticas na regi\u00e3o, que v\u00e3o l\u00e1 em busca \u00e1guas mais quentes para acasalar e dar \u00e0 luz. Usando etiquetas anexadas aos animais, a equipe de cientistas pode registrar seus guinchos e grunhidos fracos.<\/p>\n<p>\u201cEsses sinais entre a m\u00e3e e o filhote s\u00e3o mais silenciosos do que os das baleias jubarte comuns adultas\u201d, disse Videsen, observando que eles eram 40 decib\u00e9is mais baixos do que o canto dos machos na \u00e1rea.<\/p>\n<p>Enquanto o grito de um macho pode ressoar sobre uma \u00e1rea de v\u00e1rios quil\u00f4metros, as baleias analisadas no estudo s\u00f3 conseguiam ouvir os chamados umas das outras dentro de uma dist\u00e2ncia de menos de 100 metros, acrescentou. Os sons baixos foram detectados quando os animais estavam nadando, sugerindo que o tom discreto ajuda os mam\u00edferos a permanecer juntos nas \u00e1guas turvas de reprodu\u00e7\u00e3o, infestadas de orcas atacando filhotes perdidos.<\/p>\n<h3><b>Estrat\u00e9gia de sobreviv\u00eancia<\/b><\/h3>\n<p>Os sons fracos s\u00e3o tamb\u00e9m uma maneira de impedir que o barulho interfira na alimenta\u00e7\u00e3o dos animais, espantando as presas. Al\u00e9m disso, os pesquisadores acreditam que m\u00e3e e filhote \u2013 em seu esfor\u00e7o para passar despercebidos \u2013 podem ter desenvolvido um m\u00e9todo silencioso para iniciar a amamenta\u00e7\u00e3o. Em vez de sinalizar a fome vocalmente e arriscar ser descoberto, o filhote \u201cse esfrega em sua m\u00e3e\u201d, de acordo com o estudo.<\/p>\n<p>As baleias jubarte podem ser encontradas no \u00c1rtico e na Ant\u00e1rtica. Cada grupo passa o ver\u00e3o nos polos e viaja para \u00e1reas tropicais em seus respectivos hemisf\u00e9rios durante o inverno para se reproduzir.<\/p>\n<p>A investiga\u00e7\u00e3o cient\u00edfica tamb\u00e9m lan\u00e7ou luz sobre o crescente problema da polui\u00e7\u00e3o sonora no oceano, que pode prejudicar gravemente a vida marinha. \u201cComo a m\u00e3e e o filhote se comunicam por \u2018sussurros\u2019, o ru\u00eddo do transporte pode facilmente mascarar esses chamados silenciosos\u201d, provocando potencialmente a separa\u00e7\u00e3o do par, disse Videsen.<\/p>\n<p>&nbsp;<\/p>\n<\/section>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>As baleias jubarte ant\u00e1rticas rec\u00e9m-nascidas e suas m\u00e3es \u201csussurram\u201d umas \u00e0s outras para escapar de<\/p>\n","protected":false},"author":7,"featured_media":64741,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"uagb_featured_image_src":{"full":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias.jpg",415,265,false],"thumbnail":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias-150x150.jpg",150,150,true],"medium":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias-300x192.jpg",300,192,true],"medium_large":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias.jpg",415,265,false],"large":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias.jpg",415,265,false],"1536x1536":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias.jpg",415,265,false],"2048x2048":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias.jpg",415,265,false],"cream-magazine-thumbnail-2":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias.jpg",415,265,false],"cream-magazine-thumbnail-3":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias.jpg",415,265,false],"cream-magazine-thumbnail-4":["https:\/\/espacoecologico.com.br\/arquivo\/wp-content\/uploads\/2017\/04\/baleias.jpg",415,265,false]},"uagb_author_info":{"display_name":"","author_link":"https:\/\/espacoecologico.com.br\/arquivo\/author\/"},"uagb_comment_info":0,"uagb_excerpt":"As baleias jubarte ant\u00e1rticas rec\u00e9m-nascidas e suas m\u00e3es \u201csussurram\u201d umas \u00e0s outras para escapar de","_links":{"self":[{"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/posts\/64740"}],"collection":[{"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/comments?post=64740"}],"version-history":[{"count":0,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/posts\/64740\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/media\/64741"}],"wp:attachment":[{"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/media?parent=64740"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/categories?post=64740"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/espacoecologico.com.br\/arquivo\/wp-json\/wp\/v2\/tags?post=64740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}