Featured Research

from universities, journals, and other organizations

Skin hair skims heat off elephants

Date:
October 10, 2012
Source:
Public Library of Science
Summary:
Body hair in mammals is typically thought to have evolved to keep us warm in colder prehistoric times, but a new study suggests that it may do the opposite, at least in elephants. Epidermal hair may have evolved to help the animals keep cool in the hot regions they live in, according to new research.

This is skin hair on African and Asian elephants.
Credit: Myhrvold CL, Stone HA, Bou-Zeid E. What Is the Use of Elephant Hair? PLoS ONE, 2012; DOI: 10.1371/journal.pone.0047018

Body hair in mammals is typically thought to have evolved to keep us warm in colder prehistoric times, but a new study suggests that it may do the opposite, at least in elephants. Epidermal hair may have evolved to help the animals keep cool in the hot regions they live in, according to new research published Oct 10 in the open access journal PLOS ONE by Conor Myhrvold and colleagues at Princeton University.

Related Articles


Though the idea that low surface densities of hair can help dissipate heat is a popular concept in engineering, the biological and evolutionary significance of sparse skin hair is not well known. The authors studied the effects of skin hair densities in Asian and African elephants on thermoregulation in these animals, and concluded that elephant skin hair significantly enhances their capacity to keep cool under different scenarios like higher daytime temperatures or less windy days.

Their research suggests that the dense body hair of furry animals helps with insulation, but as skin hair grows sparser, a tipping point is reached where, for animals such as elephants, skin hair begins to help release heat from the body rather than retain it.

According to the authors, elephants have the greatest need for such heat loss to maintain a constant body temperature, since they are large terrestrial mammals that live in hot climates. Their results are the first to suggest that animal hairs could play a role in heat dissipation that could be beneficial to certain animals, like elephants. Elie Bou-Zeid, corresponding author on the study, says "Sparse hair increases heat dissipation from the skin of elephants and help the largest terrestrial mammal meet its thermoregulation needs."


Story Source:

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


Journal Reference:

  1. Myhrvold CL, Stone HA, Bou-Zeid E. What Is the Use of Elephant Hair? PLoS ONE, 2012; DOI: 10.1371/journal.pone.0047018

Cite This Page:

Public Library of Science. "Skin hair skims heat off elephants." ScienceDaily. ScienceDaily, 10 October 2012. <www.sciencedaily.com/releases/2012/10/121010172120.htm>.
Public Library of Science. (2012, October 10). Skin hair skims heat off elephants. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2012/10/121010172120.htm
Public Library of Science. "Skin hair skims heat off elephants." ScienceDaily. www.sciencedaily.com/releases/2012/10/121010172120.htm (accessed December 19, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Friday, December 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Researchers Test Colombian Village With High Alzheimer's Rates

Researchers Test Colombian Village With High Alzheimer's Rates

AFP (Dec. 19, 2014) In Yarumal, a village in N. Colombia, Alzheimer's has ravaged a disproportionately large number of families. A genetic "curse" that may pave the way for research on how to treat the disease that claims a new victim every four seconds. Duration: 02:42 Video provided by AFP
Powered by NewsLook.com
Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Kids Die While Under Protective Services

Kids Die While Under Protective Services

AP (Dec. 18, 2014) As part of a six-month investigation of child maltreatment deaths, the AP found that hundreds of deaths from horrific abuse and neglect could have been prevented. AP's Haven Daley reports. (Dec. 18) Video provided by AP
Powered by NewsLook.com
Dads-To-Be Also Experience Hormone Changes During Pregnancy

Dads-To-Be Also Experience Hormone Changes During Pregnancy

Newsy (Dec. 18, 2014) A study from University of Michigan researchers found that expectant fathers see a decrease in testosterone as the baby's birth draws near. Video provided by Newsy
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:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

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