{"id":21480,"date":"2024-02-21T11:45:05","date_gmt":"2024-02-21T16:45:05","guid":{"rendered":"https:\/\/www.americanonewspaper.com\/es\/?p=21480"},"modified":"2024-02-21T11:45:08","modified_gmt":"2024-02-21T16:45:08","slug":"porque-cantan-las-ballenas","status":"publish","type":"post","link":"https:\/\/www.americanonewspaper.com\/es\/nature\/naturaleza\/porque-cantan-las-ballenas\/","title":{"rendered":"\u00bfPorqu\u00e9 cantan las ballenas?"},"content":{"rendered":"\n<p>Redacci\u00f3n ciencia, 21 feb (EFE).- Por Caty Ar\u00e9valo<\/p>\n\n\n\n<p class=\"dropcapp3\">Un equipo internacional de investigadores ha descubierto el fascinante mecanismo fisiol\u00f3gico del canto con el que las ballenas barbadas se comunican bajo el agua, y su descripci\u00f3n este mi\u00e9rcoles en la revista Nature ofrece valiosas claves para la conservaci\u00f3n de estos cet\u00e1ceos.<\/p>\n\n\n\n<p>El canto de las ballenas barbadas (misticetos) entre las que se incluyen especies como la jorobada, azul, gris, minke, de aleta o rorcual boreal\/austral, cautiva a la sociedad desde que los primeros pescadores comenzaron a surcar los mares.<\/p>\n\n\n\n<p>En aquellos tiempos, exentos de la contaminaci\u00f3n ac\u00fastica actual, el imponente silencio del mar en calma se interrump\u00eda en las jornadas de pesca con espeluznantes sonidos que reverberaban bajo el casco de las embarcaciones, y que los pescadores atribu\u00edan a la existencia de fantasmas o monstruos marinos.<\/p>\n\n\n\n<p>Los primeros micr\u00f3fonos acu\u00e1ticos (hidr\u00f3fonos), que comenzaron a usarse para detectar icebergs tras el hundimiento del Tit\u00e1nic y se perfeccionaron en las dos guerras mundiales para localizar submarinos, desvelaron que aquellos sonidos no eran de monstruos, sino de los cantos con los que estas ballenas se comunican en la opacidad submarina.<\/p>\n\n\n\n<p>A partir de los a\u00f1os 60, el an\u00e1lisis de espec\u00edmenes varados permiti\u00f3 a los cient\u00edficos contar con una foto anat\u00f3mica bastante precisa de las barbadas, pero el mecanismo fisiol\u00f3gico que produce el canto ha sido un misterio hasta hoy, explica en una entrevista con EFE Coen Elemans, bi\u00f3logo de la Universidad del Sur de Dinamarca.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"https:\/\/www.facebook.com\/villanuevasmultiservices\"><img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"370\" src=\"https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Screenshot-2024-02-09-at-12.28.40\u202fPM-800x370.png\" alt=\"\" class=\"wp-image-21280\" style=\"width:1067px;height:auto\" srcset=\"https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Screenshot-2024-02-09-at-12.28.40\u202fPM-800x370.png 800w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Screenshot-2024-02-09-at-12.28.40\u202fPM-300x139.png 300w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Screenshot-2024-02-09-at-12.28.40\u202fPM-768x355.png 768w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Screenshot-2024-02-09-at-12.28.40\u202fPM-1536x710.png 1536w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Screenshot-2024-02-09-at-12.28.40\u202fPM-2048x946.png 2048w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Screenshot-2024-02-09-at-12.28.40\u202fPM-150x69.png 150w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Screenshot-2024-02-09-at-12.28.40\u202fPM-696x322.png 696w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Screenshot-2024-02-09-at-12.28.40\u202fPM-1068x494.png 1068w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Screenshot-2024-02-09-at-12.28.40\u202fPM-1920x887.png 1920w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-la-respuesta\"><strong>La respuesta<\/strong><\/h2>\n\n\n\n<p>La clave est\u00e1 en la laringe: mientras las ballenas dentadas (odontocetos) desarrollaron un \u00f3rgano vocal nasal, las barbadas usan la laringe para producir sonidos.<\/p>\n\n\n\n<p>Estudios anat\u00f3micos previos describ\u00edan la laringe de las barbadas pero no la asociaban a la producci\u00f3n de sonido.<\/p>\n\n\n\n<p>El azar quiso que en 2018 un ejemplar de la tercera ballena barbada m\u00e1s grande, un rorcual boreal, acabara varado en Odense (Dinamarca) junto al laboratorio de Elemans, experto en el estudio de la comunicaci\u00f3n y conducta de estas criaturas, y que al a\u00f1o siguiente otra ballena jorobada corriera la misma suerte en ese lugar.<\/p>\n\n\n\n<p>Estos dos ejemplares, junto con otro de ballena minke que qued\u00f3 varada en la costa escocesa en 2018, han servido a Elemans y a otros investigadores austr\u00edacos y estadounidenses para descubrir que las barbadas poseen en su laringe una estructura en forma de U \u201cequivalente a nuestras cuerdas vocales\u201d de la que sale el canto, que heredaron de los mam\u00edferos terrestres hace 40 millones de a\u00f1os.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"https:\/\/www.unitedwaynnj.org\/file-your-taxes\"><img decoding=\"async\" width=\"800\" height=\"400\" src=\"https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/United-Way-banner-800x400.jpg\" alt=\"\" class=\"wp-image-21270\" style=\"width:1068px;height:auto\" srcset=\"https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/United-Way-banner-800x400.jpg 800w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/United-Way-banner-300x150.jpg 300w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/United-Way-banner-768x384.jpg 768w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/United-Way-banner-150x75.jpg 150w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/United-Way-banner-696x348.jpg 696w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/United-Way-banner-1068x534.jpg 1068w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/United-Way-banner.jpg 1200w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-el-sentido-del-canto\"><strong>El sentido del canto<\/strong><\/h2>\n\n\n\n<p>&#8220;A diferencia de las cuerdas vocales t\u00edpicas de otros mam\u00edferos, el pliegue en U de las ballenas est\u00e1 girado 90 grados en paralelo a la tr\u00e1quea, y el espacio entre los brazos del pliegue en U desemboca en una especie de saco far\u00edngeo&#8221;.<\/p>\n\n\n\n<p>Las disecciones de los ejemplares citados han constatado que el aire entra por las fosas nasales de las barbadas (espir\u00e1culos), llena las v\u00edas respiratorias y a continuaci\u00f3n va a la faringe para producir el sonido con la vibraci\u00f3n que se produce en esos pliegues en forma de U.<\/p>\n\n\n\n<p>El saco far\u00edngeo situado bajo esa U captura el aire, lo recicla y lo devuelve al pulm\u00f3n para su reutilizaci\u00f3n, al tiempo que evita la inhalaci\u00f3n de agua, y es precisamente ese proceso el que permite el canto continuo durante los largos periodos de contenci\u00f3n de la respiraci\u00f3n.<\/p>\n\n\n\n<p>&#8220;El canto es la \u00fanica forma que poseen la barbadas para encontrarse y comunicarse&#8221;, subraya el cient\u00edfico, ya que la visibilidad bajo el agua apenas supera los 30 metros de profundidad y estos animales son de grandes dimensiones: miden m\u00e1s de seis metros y suelen pesar m\u00e1s de tres toneladas.<\/p>\n\n\n\n<p>Preguntado sobre qu\u00e9 tratan de comunicar las ballenas con la diversidad de sus cantos, el bi\u00f3logo explica que &#8220;aunque la finalidad exacta se desconoce, todo apunta a que hay llamadas al apareamiento, alerta de peligros o simplemente cantos, como los de los p\u00e1jaros&#8221;.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"800\" height=\"367\" src=\"https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/GGlweb-2-800x367.jpg\" alt=\"\" class=\"wp-image-21234\" style=\"width:1067px;height:auto\" srcset=\"https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/GGlweb-2-800x367.jpg 800w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/GGlweb-2-300x138.jpg 300w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/GGlweb-2-768x352.jpg 768w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/GGlweb-2-150x69.jpg 150w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/GGlweb-2-696x319.jpg 696w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/GGlweb-2-1068x490.jpg 1068w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/GGlweb-2.jpg 1200w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-implicaciones-para-la-conservacion\"><strong>Implicaciones para la conservaci\u00f3n<\/strong><\/h2>\n\n\n\n<p>El an\u00e1lisis de las vocalizaciones de las barbadas mediante modelos computacionales ha evidenciado un dato vital para su conservaci\u00f3n: sus cantos se escuchan a una profundidad m\u00e1xima de 100 metros y en una frecuencia m\u00e1xima de 300 hercios, y su fisiolog\u00eda no da de s\u00ed para hacerse escuchar m\u00e1s all\u00e1 de esos l\u00edmites.<\/p>\n\n\n\n<p>Esto implica que al quedar los cantos dentro del rango de ruido que emiten los buques, la comunicaci\u00f3n entre las barbadas se ve &#8220;seriamente afectada&#8221; por la contaminaci\u00f3n ac\u00fastica que genera la navegaci\u00f3n.<\/p>\n\n\n\n<p>&#8220;Esperemos que este hallazgo sirva como base cient\u00edfica para reforzar las leyes que limitan la contaminaci\u00f3n ac\u00fastica en el oc\u00e9ano&#8221;, concluye.<\/p>\n\n\n\n<p>La investigadora de anatom\u00eda comparada en el Mount Sinai de Nueva York Joy Reidenberg alaba en otro art\u00edculo el descubrimiento de este mecanismo fisiol\u00f3gico de canto, aunque considera que hay que comprobar con ejemplares vivos si este sistema es, en efecto, el que hace que las minke emitan sonidos de &#8220;guerra de las galaxias&#8221; o que los cantos de los rorcuales australes suenen como disparos.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"751\" height=\"500\" src=\"https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Buceador-751x500.jpg\" alt=\"\" class=\"wp-image-21482\" style=\"width:1068px;height:auto\" srcset=\"https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Buceador-751x500.jpg 751w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Buceador-300x200.jpg 300w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Buceador-768x511.jpg 768w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Buceador-150x100.jpg 150w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Buceador-696x463.jpg 696w, https:\/\/www.americanonewspaper.com\/es\/wp-content\/uploads\/2024\/02\/Buceador.jpg 900w\" sizes=\"(max-width: 751px) 100vw, 751px\" \/><figcaption class=\"wp-element-caption\">Un buceador desciende entre tres ballenas jorobadas juveniles del tama\u00f1o de un autob\u00fas urbano. Cr\u00e9dito: Karim Iliya.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Redacci\u00f3n ciencia, 21 feb (EFE).- Por Caty Ar\u00e9valo Un equipo internacional de investigadores ha descubierto el fascinante mecanismo fisiol\u00f3gico del canto con el que las ballenas barbadas se comunican bajo el agua, y su descripci\u00f3n este mi\u00e9rcoles en la revista Nature ofrece valiosas claves para la conservaci\u00f3n de estos cet\u00e1ceos. El canto de las ballenas [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":21481,"comment_status":"closed","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"_acf_changed":false,"tdm_status":"","tdm_grid_status":"","_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"_wpas_customize_per_network":false},"categories":[577],"tags":[],"class_list":{"0":"post-21480","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-naturaleza"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.6) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>\u00bfPorqu\u00e9 cantan las ballenas? 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