fbpx
sábado, septiembre 28, 2024
InicioHemerotecaEncuentran animal capaz de contraer su cráneo en un 20%

Encuentran animal capaz de contraer su cráneo en un 20%

La cabeza de la musaraña bicolor, o ‘Sorex araneus’, se encoge hasta un 20% cada invierno y vuelve a crecer al inicio de la primavera, según un estudio.

“Hemos descubierto que todas las musarañas experimentan una disminución dramática del tamaño de la caja craneal de verano a invierno”, señaló Javier Lázaro, del Instituto Max Planck de Ornitología, en Alemania,.

“Después, en primavera, la caja craneal vuelve a crecer, llegando casi al tamaño original durante el segundo verano.

Para documentar este fenómeno, los autores del estudio utilizaron trampas para capturar a 12 de estos pequeños mamíferos entre junio de 2014 y octubre de 2015. Luego anestesiaron a los animales y les colocaron microchips para la posterior identificación y radiografía de las cabezas.

Al comienzo del invierno, el tamaño del cráneo de las musarañas se había reducido en un 15,3% de promedio, y volvió a aumentar una media de 9,3% en primavera. No está claro cómo funciona este proceso, pero los científicos creen que el tejido dentro de las articulaciones que conectan los huesos del cráneo podría degradarse y luego regenerarse.

Varios de los principales órganos de las musarañas, incluido el cerebro, también pierden masa durante el invierno. Esta contracción puede ayudar a los animales a sobrevivir en condiciones de falta de alimento.

 

RELATED ARTICLES

Most Popular

Recent Comments

Usamos cookies para personalizar el contenido y los anuncios, para proporcionar funciones de redes sociales y para analizar nuestro tráfico. También compartimos información sobre su uso de nuestro sitio con nuestros socios de redes sociales, publicidad y análisis. View more
Cookies settings
Aceptar
Privacy & Cookie policy
Privacy & Cookies policy
Cookie name Active

Who are we?

Our website address is: https://elurbano.news.

What personal data we collect and why we collect it

comments

When visitors leave comments on the site we collect the data shown in the comments form, and also the visitor’s IP address and browser user agent string to help spam detection. An anonymized string created from your email address (also called a hash) may be provided to the Gravatar service to see if you are using it. The Gravatar service privacy policy is available here: https://automattic.com/privacy/. After approval of your comment, your profile picture is visible to the public in the context of your comment.

Media

If you upload images to the website, you should avoid uploading images with embedded location data (EXIF GPS) included. Visitors to the website can download and extract any location data from images on the website.

Contact forms

Cookies

If you leave a comment on our site you may opt-in to saving your name, email address and website in cookies. These are for your convenience so that you do not have to fill in your details again when you leave another comment. These cookies will last for one year. If you visit our login page, we will set a temporary cookie to determine if your browser accepts cookies. This cookie contains no personal data and is discarded when you close your browser. When you log in, we will also set up several cookies to save your login information and your screen display choices. Login cookies last for two days, and screen options cookies last for a year. If you select "Remember Me", your login will persist for two weeks. If you log out of your account, the login cookies will be removed. If you edit or publish an article, an additional cookie will be saved in your browser. This cookie includes no personal data and simply indicates the post ID of the article you just edited. It expires after 1 day.

Embedded content from other websites

Articles on this site may include embedded content (eg videos, images, articles, etc.). Embedded content from other websites behaves in the exact same way as if the visitor has visited the other website. These websites may collect data about you, use cookies, embed additional third-party tracking, and monitor your interaction with that embedded content, including tracking your interaction with the embedded content if you have an account and are logged in to that website.

Analytics

Who we share your data with

If you request a password reset, your IP address will be included in the reset email.

How long we retain your data

If you leave a comment, the comment and its metadata are retained indefinitely. This is so we can recognize and approve any follow-up comments automatically instead of holding them in a moderation queue. For users that register on our website (if any), we also store the personal information they provide in their user profile. All users can see, edit, or delete their personal information at any time (except they cannot change their username). Website administrators can also see and edit that information.

What rights you have over your data

If you have an account on this site, or have left comments, you can request to receive an exported file of the personal data we hold about you, including any data you have provided to us. You can also request that we erase any personal data we hold about you. This does not include any data we are obliged to keep for administrative, legal, or security purposes.

Where we send your data

Visitor comments may be checked through an automated spam detection service.

Your contact information

Other information

How we protect your data

What data breach procedures we have in place

What third parties we receive data from

What automated decision making and/or profiling we do with user data

Industry regulatory disclosure requirements

Save settings
Cookies settings
Open