Featured Research

from universities, journals, and other organizations

Dental Crowns Reveal The Diet Of A Species

Date:
December 15, 2006
Source:
University of Helsinki
Summary:
According to recent research, the complexity of tooth surfaces reveals the diet of a species. Scientists at the University of Helsinki's Institute of Biotechnology and Department of Geology showed that the more complex the surface of an animal's teeth, the greater the share of vegetables in its diet. For instance, the teeth of carnivores and rodents differ in almost every aspect, but if a carnivore and a rodent eat similar food, their teeth are equally complex. The results were published in Nature.

According to recent research, the complexity of tooth surfaces reveals the diet of a species. Scientists at the University of Helsinki's Institute of Biotechnology and Department of Geology showed that the more complex the surface of an animal's teeth, the greater the share of vegetables in its diet. For instance, the teeth of carnivores and rodents differ in almost every aspect, but if a carnivore and a rodent eat similar food, their teeth are equally complex. The results were published in Nature.

The size, number, occlusion and dental crown cusps of carnivores and rodents, such as cats and mice, are very different. Based on their research, the Helsinki scientists discovered that although the teeth of rodents and predators seem very different, the values describing their complexity correspond if the species share a similar diet. Both groups have species that eat both meat and vegetable foods.

The scientists studied the differences in the teeth of various species by measuring the molar crowns of 81 mammalian species and, based on the measurements, creating 3D virtual models of them. The models were then used to develop new methods of measurement, which enable scientists to identify all the parts of teeth that break down the food, the 'tools', as it were.

New database is the first to offer information on phenotypes

The 3D virtual models were entered in the MorphoBrowser database created by the team's scientists. The database now contains data on fossils, existing animals as well as the modified teeth of mutant mice. The open access database for the first time makes phenotypes, or 3D models of the information contained in the genes, publicly available on the Internet. This can be compared to the information on the genetic sequences of different species (such as the human genome), which have been available on public databases for quite a while.

3D measurements enable scientists to determine the diet of extinct animals even in taxonomic groups that have no counterparts in living species. Indeed, the database is particularly useful to evolutionary scientists, who study the diet of extinct species based on the shape of their molars. This new approach also creates opportunities for studying the relationship between dental shapes and developmental biology.

The research was financed by the Systems Biology and Bioinformatics Research Programme of the Academy of Finland.


Story Source:

The above story is based on materials provided by University of Helsinki. Note: Materials may be edited for content and length.


Cite This Page:

University of Helsinki. "Dental Crowns Reveal The Diet Of A Species." ScienceDaily. ScienceDaily, 15 December 2006. <www.sciencedaily.com/releases/2006/12/061214142332.htm>.
University of Helsinki. (2006, December 15). Dental Crowns Reveal The Diet Of A Species. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2006/12/061214142332.htm
University of Helsinki. "Dental Crowns Reveal The Diet Of A Species." ScienceDaily. www.sciencedaily.com/releases/2006/12/061214142332.htm (accessed July 22, 2014).

Share This




More Plants & Animals News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

San Diego Zoo Welcomes New, Rare Rhino Calf

San Diego Zoo Welcomes New, Rare Rhino Calf

Reuters - US Online Video (July 21, 2014) An endangered black rhino baby is the newest resident at the San Diego Zoo. Sasha Salama reports. Video provided by Reuters
Powered by NewsLook.com
Shark Sightings a Big Catch for Cape Tourism

Shark Sightings a Big Catch for Cape Tourism

AP (July 21, 2014) A rise in shark sightings along the shores of Chatham, Massachusetts is driving a surge of eager vacationers to the beach town looking to catch a glimpse of a great white. (July 21) Video provided by AP
Powered by NewsLook.com
$23.6 Billion Awarded To Widow In Smoking Lawsuit

$23.6 Billion Awarded To Widow In Smoking Lawsuit

Newsy (July 20, 2014) Cynthia Robinson claims R.J. Reynolds Tobacco Company hid the health and addiction risks of its products, leading to the death of her husband in 1996. Video provided by Newsy
Powered by NewsLook.com
A Centuries' Old British Tradition Is Far from a Swan Song

A Centuries' Old British Tradition Is Far from a Swan Song

AFP (July 19, 2014) As if it weren't enough that the Queen is the Sovereign of the UK and 15 other Commonwealth realms, she is also the owner of all Britain's unmarked swans. Duration: 02:18 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins