{"id":19178,"date":"2026-07-27T13:40:22","date_gmt":"2026-07-27T16:40:22","guid":{"rendered":"https:\/\/cliente1.publisher.highstack.com.ar\/?p=19178"},"modified":"2026-07-27T13:40:22","modified_gmt":"2026-07-27T16:40:22","slug":"gigantes-de-385-kilos-los-osos-pardos-que-poblaron-portugal-y-perdieron-la-mitad-de-su-peso-por-la-accion-humanaun-nuevo-trabajo-paleontologico-documenta-ejemplares-ibericos-de-proporciones-excepcion","status":"publish","type":"post","link":"https:\/\/cliente1.publisher.highstack.com.ar\/?p=19178","title":{"rendered":"Gigantes de 385 kilos: los osos pardos que poblaron Portugal y perdieron la mitad de su peso por la acci\u00f3n humanaUn nuevo trabajo paleontol\u00f3gico documenta ejemplares ib\u00e9ricos de proporciones excepcionales en el registro f\u00f3sil europeo y propone que la caza, la deforestaci\u00f3n y la alteraci\u00f3n del h\u00e1bitat moldearon la evoluci\u00f3n de la especie durante milenios"},"content":{"rendered":"<div class=\"visual__image image-initial-width\"><picture><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/JHY3E5H45BEV7IVXQJYVMGUMBQ.png?auth=8797a798baf53f62aad15c1295db6ffd69748a33e0bf1be29dac4c46cdcc89f5&amp;smart=true&amp;width=992&amp;height=558&amp;quality=85\" media=\"(min-width: 1000px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/JHY3E5H45BEV7IVXQJYVMGUMBQ.png?auth=8797a798baf53f62aad15c1295db6ffd69748a33e0bf1be29dac4c46cdcc89f5&amp;smart=true&amp;width=768&amp;height=432&amp;quality=85\" media=\"(min-width: 768px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/JHY3E5H45BEV7IVXQJYVMGUMBQ.png?auth=8797a798baf53f62aad15c1295db6ffd69748a33e0bf1be29dac4c46cdcc89f5&amp;smart=true&amp;width=577&amp;height=325&amp;quality=85\" media=\"(min-width: 580px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/JHY3E5H45BEV7IVXQJYVMGUMBQ.png?auth=8797a798baf53f62aad15c1295db6ffd69748a33e0bf1be29dac4c46cdcc89f5&amp;smart=true&amp;width=420&amp;height=236&amp;quality=85\" media=\"(min-width: 350px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/JHY3E5H45BEV7IVXQJYVMGUMBQ.png?auth=8797a798baf53f62aad15c1295db6ffd69748a33e0bf1be29dac4c46cdcc89f5&amp;smart=true&amp;width=350&amp;height=197&amp;quality=85\" media=\"(min-width: 80px)\"><\/source><\/picture><\/div>\n<div class=\"sharebar-container display_flex sharebar-new\" style=\"opacity:1\">\n<div class=\"share-bar-article-date-container \"><span class=\"sharebar-article-date\">27 Jul, 2026 12:08 p. m. EST<\/span><\/div>\n<div class=\"sharebar-buttons-container display_flex\">\n<div aria-label=\"Guardar\" class=\"sharebar-buttons button-save\" role=\"button\" tabindex=\"0\"><svg width=\"9\" height=\"12\" viewbox=\"0 0 8 10\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"saved-icon saved\"><path d=\"M6.64286 0.5V9.31687L4.1116 7.16407L4.11106 7.16361C3.79894 6.89891 3.34392 6.89891 3.03179 7.16361L3.03126 7.16407L0.5 9.31687V0.5H6.64286Z\"><\/path><\/svg><span class=\"buttons-save-text\">Guardar<\/span><\/div>\n<div class=\"sharebar-buttons-separator\"><\/div>\n<p><button class=\"sharemenu-buttons display_flex\" aria-label=\"Compartir en Telegram\"><svg width=\"38\" height=\"38\" viewbox=\"0 0 38 38\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><rect x=\"0.5\" y=\"0.5\" width=\"37\" height=\"37\" rx=\"18.5\" fill=\"white\"><\/rect><rect x=\"0.5\" y=\"0.5\" width=\"37\" height=\"37\" rx=\"18.5\" stroke=\"#C2C2C2\"><\/rect><path d=\"M24.9696 12.5511L10.3405 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15.5983 18.9663 16.0426 19.5618C16.887 20.6638 17.8646 21.6237 19.1622 22.1925C19.7932 22.4769 20.4331 22.7613 21.1441 22.7613C21.2685 22.7613 21.393 22.7613 21.5085 22.7346C22.4506 22.5391 23.1172 22.0058 23.0816 21.0193C23.0816 20.9216 23.0194 20.7794 22.9483 20.7438C22.3973 20.4594 21.8462 20.2017 21.2863 19.9439Z\" fill=\"#555555\"><\/path><path d=\"M26.9482 17.8724C26.3972 13.4642 22.1401 10.3447 17.7229 11.1179C12.6481 11.9977 9.71521 17.2859 11.6883 21.9963C12.1948 22.6629 12.0615 23.3472 11.8216 24.0849C11.5105 25.027 11.2794 26.0046 11.0039 27C11.1194 26.9733 11.1994 26.9644 11.2794 26.9378C12.5059 26.6178 13.7324 26.3068 14.9411 25.9868C15.1544 25.9335 15.3144 25.9602 15.5099 26.0579C17.1719 26.8667 18.9227 27.0978 20.718 26.7067C24.833 25.7913 27.4548 22.0496 26.9305 17.8902L26.9482 17.8724ZM20.0515 25.4624C18.4784 25.7113 17.003 25.3913 15.6166 24.6003C15.5099 24.5381 15.3411 24.5115 15.2077 24.547C14.4612 24.7248 13.7146 24.9292 12.9147 25.1336C13.1192 24.3693 13.3058 23.6672 13.5102 22.9473C13.5635 22.7606 13.5369 22.6273 13.4391 22.4673C11.0039 18.5479 13.1014 13.5442 17.6163 12.5043C21.2868 11.6511 25.0285 14.1841 25.5884 17.908C26.1395 21.5519 23.6954 24.8936 20.0515 25.4624Z\" fill=\"#555555\"><\/path><\/svg><\/button><button class=\"sharemenu-buttons display_flex\" aria-label=\"Compartir en Facebook\"><svg width=\"38\" height=\"38\" viewbox=\"0 0 38 38\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><rect x=\"0.5\" y=\"0.5\" width=\"37\" height=\"37\" rx=\"18.5\" fill=\"white\"><\/rect><rect x=\"0.5\" y=\"0.5\" width=\"37\" height=\"37\" rx=\"18.5\" stroke=\"#C2C2C2\"><\/rect><path d=\"M17.3544 26.9921V18.9235H15V16.3346H17.3544V16.0805C17.3544 15.3816 17.3291 14.6748 17.3882 13.976C17.3882 12.8642 18.0633 11.8556 19.1266 11.3712C19.5232 11.1965 19.9452 11.0853 20.3755 11.0376C21.2532 10.9741 22.1308 10.99 23 11.0932V13.4201H22.7722C22.2743 13.4201 21.7848 13.4201 21.2869 13.436C20.73 13.4042 20.2489 13.8013 20.2152 14.3254C20.2152 14.373 20.2152 14.4128 20.2152 14.4604C20.1983 15.0481 20.2152 15.6357 20.2152 16.2234C20.2152 16.2552 20.2152 16.2949 20.2321 16.3267H22.9409C22.8228 17.2082 22.7046 18.0579 22.5865 18.9315H20.2236V27H17.3629L17.3544 26.9921Z\" fill=\"#555555\"><\/path><\/svg><\/button><\/div>\n<\/div>\n<p class=\"paragraph\" data-paragraph-number=\"1\">Hace unos 22.000 a\u00f1os, un <a rel=\"noopener noreferrer\" href=\"https:\/\/www.infobae.com\/america\/ciencia-america\/2026\/07\/12\/un-estudio-explica-como-el-oso-pardo-sobrevivio-en-europa-durante-175000-anos\"><b>oso pardo<\/b><\/a> recorr\u00eda los territorios que hoy conforman <b>Portugal<\/b>. Sus huesos, recuperados en <b>cuevas de Cadaval<\/b>, permiten estimar que ese ejemplar alcanz\u00f3 alrededor de <b>385 kilogramos<\/b>, uno de los mayores pesos documentados en el registro f\u00f3sil europeo para la especie.<\/p>\n<div class=\"marfeel-recommender marfeel-recommender-1\"><\/div>\n<p class=\"paragraph\" data-paragraph-number=\"2\">Los <b>osos pardos ib\u00e9ricos<\/b> actuales pesan en torno a <b>144 kilogramos<\/b> los machos y 102 kilogramos las hembras, una reducci\u00f3n superior al <b>40%<\/b> respecto de sus antepasados del Pleistoceno. Un trabajo liderado por <b>Dar\u00edo Estraviz-L\u00f3pez<\/b>, paleont\u00f3logo de la NOVA School of Science and Technology de Portugal, atribuye ese cambio a <a rel=\"noopener noreferrer\" href=\"https:\/\/www.infobae.com\/america\/ciencia-america\/2025\/10\/15\/un-estudio-de-fosiles-muestra-como-sobrevivieron-algunas-especies-ante-cambios-climaticos-extremos\/\"><b>transformaciones ambientales<\/b><\/a> y a presi\u00f3n humana acumulada durante milenios.<\/p>\n<div class=\"inline ad-wrapper dfpAd ad-inline ad-text ad-component-container\" style=\"--ad-shell-height:250px;--ad-shell-width:300px\" data-ad-wrapper=\"arcad\" data-ad-type=\"inline\" data-ad-slot=\"infobae\/america\/mundo\/nota\/inline\" data-ad-container=\"dfp\" data-ad-slot-name=\"infobae\/america\/mundo\/nota\/inline\">\n<p class=\"ad-shell-label\">PUBLICIDAD<\/p>\n<div id=\"infobae\/america\/mundo\/nota\/inline\" class=\"infobae\/america\/mundo\/nota\/inline arcad ad-slot-node ad-slot-node--boxed\" data-ad-slot-id=\"infobae\/america\/mundo\/nota\/inline\"><\/div>\n<\/div>\n<p class=\"paragraph\" data-paragraph-number=\"3\">El <a href=\"https:\/\/doi.org\/10.1016\/j.palaeo.2026.113964\" target=\"_blank\" rel=\"noreferrer\" title=\"https:\/\/doi.org\/10.1016\/j.palaeo.2026.113964\"><b>estudio<\/b><\/a>, publicado en <i>Palaeogeography, Palaeoclimatology, Palaeoecology<\/i>, se basa en el an\u00e1lisis de m\u00e1s de <b>500 f\u00f3siles<\/b> procedentes de <b>seis yacimientos portugueses<\/b>: la Gruta da Furninha (Peniche), la Gruta das Fontainhas (Cadaval), Serra de Molianos (Alcoba\u00e7a), la Gruta do Caldeir\u00e3o (Tomar), la Gruta do Escoural (Montemor-o-Novo) y la Gruta da Oliveira (Torres Novas). A partir de <b>mediciones morfom\u00e9tricas<\/b> y estimaciones de masa corporal, el equipo reconstruy\u00f3 c\u00f3mo evolucion\u00f3 la especie durante decenas de miles de a\u00f1os.<\/p>\n<div class=\"marfeel-recommender marfeel-recommender-3\"><\/div>\n<div class=\"visual__image\"><picture><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/ADR6G2NN4RAALCIL6QFTTD34KE.png?auth=7d16d1acf86f36f0f5fd4f7f6dfaccfca899ecb11562aec245ad052cdc328b72&amp;smart=true&amp;width=992&amp;height=554&amp;quality=85\" media=\"(min-width: 1000px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/ADR6G2NN4RAALCIL6QFTTD34KE.png?auth=7d16d1acf86f36f0f5fd4f7f6dfaccfca899ecb11562aec245ad052cdc328b72&amp;smart=true&amp;width=768&amp;height=429&amp;quality=85\" media=\"(min-width: 768px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/ADR6G2NN4RAALCIL6QFTTD34KE.png?auth=7d16d1acf86f36f0f5fd4f7f6dfaccfca899ecb11562aec245ad052cdc328b72&amp;smart=true&amp;width=577&amp;height=322&amp;quality=85\" media=\"(min-width: 580px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/ADR6G2NN4RAALCIL6QFTTD34KE.png?auth=7d16d1acf86f36f0f5fd4f7f6dfaccfca899ecb11562aec245ad052cdc328b72&amp;smart=true&amp;width=420&amp;height=234&amp;quality=85\" media=\"(min-width: 350px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/ADR6G2NN4RAALCIL6QFTTD34KE.png?auth=7d16d1acf86f36f0f5fd4f7f6dfaccfca899ecb11562aec245ad052cdc328b72&amp;smart=true&amp;width=350&amp;height=195&amp;quality=85\" media=\"(min-width: 80px)\"><\/source><img alt=\"Ilustraci\u00f3n a t\u00e9mpera: oso pardo caminando en paisaje nevado y pradera con flores, siluetas de osos y mand\u00edbulas f\u00f3siles en el suelo.\" class=\"global-image\" decoding=\"async\" fetchpriority=\"low\" height=\"1536\" loading=\"lazy\" src=\"https:\/\/www.infobae.com\/resizer\/v2\/ADR6G2NN4RAALCIL6QFTTD34KE.png?auth=7d16d1acf86f36f0f5fd4f7f6dfaccfca899ecb11562aec245ad052cdc328b72&amp;smart=true&amp;width=350&amp;height=195&amp;quality=85\" width=\"2752\"><\/picture><\/div>\n<h2 class=\"text-align-left vertical-align-top line-height-100 header headline-class-h2 headline\" id=\"la-ausencia-del-oso-de-las-cavernas-en-portugal\">La ausencia del oso de las cavernas en Portugal<\/h2>\n<p class=\"paragraph\" data-paragraph-number=\"4\">Cuando se estudia la fauna del <b>Pleistoceno<\/b> europeo, el <b>oso de las cavernas<\/b> (<i>Ursus spelaeus<\/i>) ocupa un lugar central: fue un animal de grandes dimensiones que pobl\u00f3 numerosas cuevas del continente antes de extinguirse hace unos <b>24.000 a\u00f1os<\/b>. El estudio confirma que, pese a d\u00e9cadas de excavaciones, no existe evidencia de que esta especie llegara a establecer poblaciones estables en territorio portugu\u00e9s.<\/p>\n<div class=\"inline_2 ad-wrapper dfpAd ad-inline ad-text ad-component-container\" style=\"--ad-shell-height:250px;--ad-shell-width:300px\" data-ad-wrapper=\"arcad\" data-ad-type=\"inline_2\" data-ad-slot=\"infobae\/america\/mundo\/nota\/inline_2\" data-ad-container=\"dfp\" data-ad-slot-name=\"infobae\/america\/mundo\/nota\/inline_2\">\n<p class=\"ad-shell-label\">PUBLICIDAD<\/p>\n<div id=\"infobae\/america\/mundo\/nota\/inline_2\" class=\"infobae\/america\/mundo\/nota\/inline_2 arcad ad-slot-node ad-slot-node--boxed\" data-ad-slot-id=\"infobae\/america\/mundo\/nota\/inline_2\"><\/div>\n<\/div>\n<p class=\"paragraph\" data-paragraph-number=\"5\">Seg\u00fan explic\u00f3 Estraviz-L\u00f3pez en declaraciones recogidas por <i>Phys.org<\/i>, los osos de las cavernas requer\u00edan cavidades mucho m\u00e1s amplias para hibernar y los mismos <b>linajes maternos<\/b> regresaban a las mismas cuevas durante miles de a\u00f1os, lo que habr\u00eda impedido su expansi\u00f3n hacia el extremo occidental de la pen\u00ednsula.<\/p>\n<div class=\"marfeel-recommender marfeel-recommender-5\"><\/div>\n<p class=\"paragraph\" data-paragraph-number=\"6\">Ante esa ausencia, los osos pardos ocuparon el <b>espacio ecol\u00f3gico vacante<\/b> que en otras regiones del continente estaba cubierto por esa especie. Los ejemplares de la <b>Gruta da Furninha<\/b>, con una antig\u00fcedad de alrededor de 80.000 a\u00f1os, presentaban una robustez \u00f3sea que recuerda a la del oso de las cavernas. Los investigadores interpretan esa <b>convergencia morfol\u00f3gica<\/b> como consecuencia de haber asumido ese papel sin competencia.<\/p>\n<div class=\"ad_1 ad-wrapper dfpAd ad-1-al-6 ad-text ad-component-container\" style=\"--ad-shell-height:250px;--ad-shell-width:300px\" data-ad-wrapper=\"arcad\" data-ad-type=\"ad_1\" data-ad-slot=\"infobae\/america\/mundo\/nota\/ad_1\" data-ad-container=\"dfp\" data-ad-slot-name=\"infobae\/america\/mundo\/nota\/ad_1\">\n<p class=\"ad-shell-label\">PUBLICIDAD<\/p>\n<div id=\"infobae\/america\/mundo\/nota\/ad_1\" class=\"infobae\/america\/mundo\/nota\/ad_1 arcad ad-slot-node ad-slot-node--boxed\" data-ad-slot-id=\"infobae\/america\/mundo\/nota\/ad_1\"><\/div>\n<\/div>\n<div class=\"visual__image\"><picture><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/ROCA5NVDPNDKDJZ6DO62GLDPPU.png?auth=365ed499ee9abccb9671bb40f0d9d427960b9e33f612bdd34373b41fcf883340&amp;smart=true&amp;width=992&amp;height=541&amp;quality=85\" media=\"(min-width: 1000px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/ROCA5NVDPNDKDJZ6DO62GLDPPU.png?auth=365ed499ee9abccb9671bb40f0d9d427960b9e33f612bdd34373b41fcf883340&amp;smart=true&amp;width=768&amp;height=419&amp;quality=85\" media=\"(min-width: 768px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/ROCA5NVDPNDKDJZ6DO62GLDPPU.png?auth=365ed499ee9abccb9671bb40f0d9d427960b9e33f612bdd34373b41fcf883340&amp;smart=true&amp;width=577&amp;height=315&amp;quality=85\" media=\"(min-width: 580px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/ROCA5NVDPNDKDJZ6DO62GLDPPU.png?auth=365ed499ee9abccb9671bb40f0d9d427960b9e33f612bdd34373b41fcf883340&amp;smart=true&amp;width=420&amp;height=229&amp;quality=85\" media=\"(min-width: 350px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/ROCA5NVDPNDKDJZ6DO62GLDPPU.png?auth=365ed499ee9abccb9671bb40f0d9d427960b9e33f612bdd34373b41fcf883340&amp;smart=true&amp;width=350&amp;height=191&amp;quality=85\" media=\"(min-width: 80px)\"><\/source><img alt=\"(Imagen Ilustrativa Infobae)\" class=\"global-image\" decoding=\"async\" fetchpriority=\"low\" height=\"768\" loading=\"lazy\" src=\"https:\/\/www.infobae.com\/resizer\/v2\/ROCA5NVDPNDKDJZ6DO62GLDPPU.png?auth=365ed499ee9abccb9671bb40f0d9d427960b9e33f612bdd34373b41fcf883340&amp;smart=true&amp;width=350&amp;height=191&amp;quality=85\" width=\"1408\"><\/picture><\/div>\n<h2 class=\"text-align-left vertical-align-top line-height-100 header headline-class-h2 headline\" id=\"la-reduccion-de-tamano-y-la-presion-humana\">La reducci\u00f3n de tama\u00f1o y la presi\u00f3n humana<\/h2>\n<p class=\"paragraph\" data-paragraph-number=\"7\">El trabajo identifica una tendencia: a lo largo del tiempo, el oso pardo ib\u00e9rico fue perdiendo <b>masa corporal<\/b> de forma sostenida. Durante el <b>Holoceno temprano<\/b>, entre hace 12.000 y 8.000 a\u00f1os, los machos de la zona noroccidental de Espa\u00f1a pesaban en torno a <b>260 kilogramos<\/b>.<\/p>\n<p class=\"paragraph\" data-paragraph-number=\"8\">El comunicado institucional de la NOVA School of Science and Technology se\u00f1ala que esta reducci\u00f3n est\u00e1 asociada a la <b>presi\u00f3n humana<\/b> y a la alteraci\u00f3n de los h\u00e1bitats. El mecanismo que proponen los investigadores no es una caza directa e intensiva, sino un proceso prolongado y difuso.<\/p>\n<p class=\"paragraph\" data-paragraph-number=\"9\">&#8220;<b>Esta presi\u00f3n prolongada pudo haber eliminado desproporcionadamente a los individuos m\u00e1s grandes y audaces, favoreciendo a los osos m\u00e1s peque\u00f1os<\/b>\u201c, afirm\u00f3 <b>Ana Garc\u00eda-V\u00e1zquez<\/b>, bi\u00f3loga y coautora del estudio en la Universidad de Bucarest.<\/p>\n<div class=\"ad_2 ad-wrapper dfpAd ad-1-al-6 ad-text ad-component-container\" style=\"--ad-shell-height:250px;--ad-shell-width:300px\" data-ad-wrapper=\"arcad\" data-ad-type=\"ad_2\" data-ad-slot=\"infobae\/america\/mundo\/nota\/ad_2\" data-ad-container=\"dfp\" data-ad-slot-name=\"infobae\/america\/mundo\/nota\/ad_2\">\n<p class=\"ad-shell-label\">PUBLICIDAD<\/p>\n<div id=\"infobae\/america\/mundo\/nota\/ad_2\" class=\"infobae\/america\/mundo\/nota\/ad_2 arcad ad-slot-node ad-slot-node--boxed\" data-ad-slot-id=\"infobae\/america\/mundo\/nota\/ad_2\"><\/div>\n<\/div>\n<div class=\"visual__image\"><picture><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/33QF4L2VHNB4LDGSP6MNZHROPQ.jpg?auth=ba4cddb3db3fa86685aec8d944f363a0c49d42ad6912bec2e237fdb97e542322&amp;smart=true&amp;width=992&amp;height=556&amp;quality=85\" media=\"(min-width: 1000px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/33QF4L2VHNB4LDGSP6MNZHROPQ.jpg?auth=ba4cddb3db3fa86685aec8d944f363a0c49d42ad6912bec2e237fdb97e542322&amp;smart=true&amp;width=768&amp;height=430&amp;quality=85\" media=\"(min-width: 768px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/33QF4L2VHNB4LDGSP6MNZHROPQ.jpg?auth=ba4cddb3db3fa86685aec8d944f363a0c49d42ad6912bec2e237fdb97e542322&amp;smart=true&amp;width=577&amp;height=323&amp;quality=85\" media=\"(min-width: 580px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/33QF4L2VHNB4LDGSP6MNZHROPQ.jpg?auth=ba4cddb3db3fa86685aec8d944f363a0c49d42ad6912bec2e237fdb97e542322&amp;smart=true&amp;width=420&amp;height=235&amp;quality=85\" media=\"(min-width: 350px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/33QF4L2VHNB4LDGSP6MNZHROPQ.jpg?auth=ba4cddb3db3fa86685aec8d944f363a0c49d42ad6912bec2e237fdb97e542322&amp;smart=true&amp;width=350&amp;height=196&amp;quality=85\" media=\"(min-width: 80px)\"><\/source><img alt=\"(Imagen Ilustrativa Infobae)\" class=\"global-image\" decoding=\"async\" fetchpriority=\"low\" height=\"816\" loading=\"lazy\" src=\"https:\/\/www.infobae.com\/resizer\/v2\/33QF4L2VHNB4LDGSP6MNZHROPQ.jpg?auth=ba4cddb3db3fa86685aec8d944f363a0c49d42ad6912bec2e237fdb97e542322&amp;smart=true&amp;width=350&amp;height=196&amp;quality=85\" width=\"1456\"><\/picture><\/div>\n<p class=\"paragraph\" data-paragraph-number=\"10\">El proceso habr\u00eda avanzado por etapas: primero, las poblaciones humanas comenzaron a compartir cuevas con los osos; despu\u00e9s, la <b>agricultura y la deforestaci\u00f3n<\/b> fragmentaron sus territorios; finalmente, la caza con armas de fuego aceler\u00f3 el declive.<\/p>\n<h2 class=\"text-align-left vertical-align-top line-height-100 header headline-class-h2 headline\" id=\"que-hipotesis-siguen-abiertas\">Qu\u00e9 hip\u00f3tesis siguen abiertas<\/h2>\n<p class=\"paragraph\" data-paragraph-number=\"11\">Los autores comparan esta din\u00e1mica con el fen\u00f3meno documentado en elefantes modernos que nacen <b>sin colmillos<\/b> como respuesta evolutiva a siglos de presi\u00f3n cazadora. Garc\u00eda-V\u00e1zquez a\u00f1adi\u00f3 una cautela: los osos del Pleistoceno y los actuales podr\u00edan no pertenecer a la misma poblaci\u00f3n, y la <b>dieta<\/b> tambi\u00e9n pudo influir, dado que los osos con alimentaci\u00f3n m\u00e1s carn\u00edvora tienden a mayor masa corporal.<\/p>\n<p class=\"paragraph\" data-paragraph-number=\"12\">El an\u00e1lisis de <b>ADN antiguo<\/b> y los estudios de is\u00f3topos estables podr\u00e1n aportar respuestas m\u00e1s precisas. El equipo tambi\u00e9n considera prioritarias nuevas <b>dataciones radiom\u00e9tricas<\/b> para precisar la historia evolutiva de la especie.<\/p>\n<div class=\"ad_3 ad-wrapper dfpAd ad-1-al-6 ad-text ad-component-container\" style=\"--ad-shell-height:250px;--ad-shell-width:300px\" data-ad-wrapper=\"arcad\" data-ad-type=\"ad_3\" data-ad-slot=\"infobae\/america\/mundo\/nota\/ad_3\" data-ad-container=\"dfp\" data-ad-slot-name=\"infobae\/america\/mundo\/nota\/ad_3\">\n<p class=\"ad-shell-label\">PUBLICIDAD<\/p>\n<div id=\"infobae\/america\/mundo\/nota\/ad_3\" class=\"infobae\/america\/mundo\/nota\/ad_3 arcad ad-slot-node ad-slot-node--boxed\" data-ad-slot-id=\"infobae\/america\/mundo\/nota\/ad_3\"><\/div>\n<\/div>\n<div class=\"visual__image\"><picture><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/7WYBPD3SINH4VNRWVL4VOQK6BE.jpg?auth=caba3fb64e53be986311c83e121690bee7b774304f7b3a0df9bec263e65a11ec&amp;smart=true&amp;width=992&amp;height=556&amp;quality=85\" media=\"(min-width: 1000px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/7WYBPD3SINH4VNRWVL4VOQK6BE.jpg?auth=caba3fb64e53be986311c83e121690bee7b774304f7b3a0df9bec263e65a11ec&amp;smart=true&amp;width=768&amp;height=430&amp;quality=85\" media=\"(min-width: 768px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/7WYBPD3SINH4VNRWVL4VOQK6BE.jpg?auth=caba3fb64e53be986311c83e121690bee7b774304f7b3a0df9bec263e65a11ec&amp;smart=true&amp;width=577&amp;height=323&amp;quality=85\" media=\"(min-width: 580px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/7WYBPD3SINH4VNRWVL4VOQK6BE.jpg?auth=caba3fb64e53be986311c83e121690bee7b774304f7b3a0df9bec263e65a11ec&amp;smart=true&amp;width=420&amp;height=235&amp;quality=85\" media=\"(min-width: 350px)\"><\/source><source srcset=\"https:\/\/www.infobae.com\/resizer\/v2\/7WYBPD3SINH4VNRWVL4VOQK6BE.jpg?auth=caba3fb64e53be986311c83e121690bee7b774304f7b3a0df9bec263e65a11ec&amp;smart=true&amp;width=350&amp;height=196&amp;quality=85\" media=\"(min-width: 80px)\"><\/source><img alt=\"(Imagen Ilustrativa Infobae)\" class=\"global-image\" decoding=\"async\" fetchpriority=\"low\" height=\"816\" loading=\"lazy\" src=\"https:\/\/www.infobae.com\/resizer\/v2\/7WYBPD3SINH4VNRWVL4VOQK6BE.jpg?auth=caba3fb64e53be986311c83e121690bee7b774304f7b3a0df9bec263e65a11ec&amp;smart=true&amp;width=350&amp;height=196&amp;quality=85\" width=\"1456\"><\/picture><\/div>\n<h2 class=\"text-align-left vertical-align-top line-height-100 header headline-class-h2 headline\" id=\"el-aporte-del-estudio-para-la-conservacion\">El aporte del estudio para la conservaci\u00f3n<\/h2>\n<p class=\"paragraph\" data-paragraph-number=\"13\">El estudio tambi\u00e9n plantea la utilidad de la <b>paleontolog\u00eda<\/b> para la conservaci\u00f3n actual. Los osos pardos desempe\u00f1an funciones ecol\u00f3gicas de amplio alcance: regulan las poblaciones de ciervos y jabal\u00edes, aprovechan carro\u00f1as y participan en la <b>dispersi\u00f3n de semillas<\/b>. \u201cUna sola deposici\u00f3n de un oso puede contener <b>m\u00e1s de 70.000 semillas<\/b>\u201c, precis\u00f3 Estraviz-L\u00f3pez.<\/p>\n<p class=\"paragraph\" data-paragraph-number=\"14\">El oso pardo se extingui\u00f3 en <b>Portugal<\/b> en el siglo XIX a causa de la actividad humana, seg\u00fan el comunicado. Comprender c\u00f3mo los gigantes ib\u00e9ricos del Pleistoceno se transformaron en los supervivientes actuales es, seg\u00fan Estraviz-L\u00f3pez, la mejor gu\u00eda disponible para proteger a los que a\u00fan quedan.<\/p>\n<div class=\"ad_4 ad-wrapper dfpAd ad-1-al-6 ad-text ad-component-container\" style=\"--ad-shell-height:250px;--ad-shell-width:300px\" data-ad-wrapper=\"arcad\" data-ad-type=\"ad_4\" data-ad-slot=\"infobae\/america\/mundo\/nota\/ad_4\" data-ad-container=\"dfp\" data-ad-slot-name=\"infobae\/america\/mundo\/nota\/ad_4\">\n<p class=\"ad-shell-label\">PUBLICIDAD<\/p>\n<div id=\"infobae\/america\/mundo\/nota\/ad_4\" class=\"infobae\/america\/mundo\/nota\/ad_4 arcad ad-slot-node ad-slot-node--boxed\" data-ad-slot-id=\"infobae\/america\/mundo\/nota\/ad_4\"><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>27 Jul, 2026 12:08 p. m. EST Guardar Hace unos 22.000 a\u00f1os, un oso pardo recorr\u00eda los territorios que hoy conforman Portugal. Sus huesos, recuperados en cuevas de Cadaval, permiten estimar que ese ejemplar alcanz\u00f3 alrededor de 385 kilogramos, uno de los mayores pesos documentados en el registro f\u00f3sil europeo para la especie. Los osos [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":19179,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-19178","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/cliente1.publisher.highstack.com.ar\/index.php?rest_route=\/wp\/v2\/posts\/19178","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cliente1.publisher.highstack.com.ar\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cliente1.publisher.highstack.com.ar\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cliente1.publisher.highstack.com.ar\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cliente1.publisher.highstack.com.ar\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=19178"}],"version-history":[{"count":0,"href":"https:\/\/cliente1.publisher.highstack.com.ar\/index.php?rest_route=\/wp\/v2\/posts\/19178\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cliente1.publisher.highstack.com.ar\/index.php?rest_route=\/wp\/v2\/media\/19179"}],"wp:attachment":[{"href":"https:\/\/cliente1.publisher.highstack.com.ar\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=19178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cliente1.publisher.highstack.com.ar\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=19178"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cliente1.publisher.highstack.com.ar\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=19178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}