Navigation Links
Walking tall to protect the species
Date:12/12/2007

The transition from apes to humans may have been partially triggered by the need to stand on two legs, in order to safely carry heavier babies. This theory1 of species evolution presented by Lia Amaral from the University of So Paulo in Brazil has just been published online in Springers journal, Naturwissenschaften.

For safety, all nonhuman primates carry their young clinging to their fur from birth, and species survival depends on it. The carrying pattern changes as the infant grows. Newborns are carried clinging to their mothers stomach, often with additional support. Months later, infants are carried over the adult body usually on the mothers back, and this carrying pattern lasts for years in apes. However, this necessity to carry infants safely imposes limits on the weight of the infants.

Through a detailed mechanical analysis of how different types of apes - gibbons, orangutans and gorillas - carry their young, looking at the properties of ape hair, infant grip, adult hair density and carrying position, Amaral demonstrates a relationship between infant weight, hair friction and body angle which ensures ape infants are carried safely.

Amaral also shows how the usual pattern of primate carrying of heavy infants is incompatible with bipedalism. African apes have to persist with knuckle-walking on all fours, or quadruped position, in order to stop their young from slipping off their backs.

The author goes on to suggest that the fall in body hair in primates could have brought on bipedality as a necessary consequence, through the strong selective pressure of safe infant carrying, as infants were no longer able to cling to their mothers body hairs. In the authors opinion, safe carrying of heavy infants justified the emergence of the biped form of movement. Although an adult gorilla is much heavier than an adult human, its offspring is only half the weight of a human baby.

Amaral concludes that this evolution to b
'/>"/>

Contact: Joan Robinson
joan.robinson@springer.com
49-622-148-78130
Springer
Source:Eurekalert

Page: 1 2

Related biology news :

1. Rain forest protection works in Peru
2. Same gene protects from 1 disease, opens door to another
3. Conservation International and Toyota partner to protect Philippines rain forests
4. Fungus genome yielding answers to protect grains, people and animals
5. Genes that both extend life and protect against cancer identified
6. Intravenous gene therapy protects normal tissue of mice during whole-body radiation
7. Rosemary chicken protects your brain from free radicals
8. Genes identified to protect brassicas from damaging disease
9. Antioxidants could provide all-purpose radiation protection
10. Secure Services Corp. Achieves Milestone in United States Identity Protection with the Launch of the SSC SHAPE Card Management Solution
11. Omega-3 fatty acids protect against Parkinsons, study says
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/24/2014)... puts out a welcome mat to bacteria seeking to invade, ... study published this week in the Proceedings of the ... battle between microbe and host that researchers can exploit to ... oft-studied plant Arabidopsis puts out a molecular signal ... a hostile army were unknowingly passing by a castle, and ...
(Date:4/23/2014)... chronic inflammatory disorders among people of lower socioeconomic status ... to the microbes that thrive in rural environments, according ... in the journal Clinical & Experimental Immunology , ... less access to green spaces may be more apt ... system dysfunction. , When our immune systems are working ...
(Date:4/23/2014)... new study from the Indiana University School of Public ... and heart disease by finding a strong association between ... coronary heart disease. , The study found that heme ... by 57 percent, while no association was found between ... sources, and coronary heart disease. , The study was ...
Breaking Biology News(10 mins):How a plant beckons the bacteria that will do it harm 2How a plant beckons the bacteria that will do it harm 3Rural microbes could boost city dwellers' health 2Rural microbes could boost city dwellers' health 3Study: Iron consumption can increase risk for heart disease 2
... Researchers have identified genetic markers that may influence whether ... according to a national longitudinal study of thousands of young ... Developmental Psychology , a publication of the American Psychological Association. ... related in any way to academic achievement is a big ...
... laparoscopic surgery "minimally invasive" instruments enter the patient through ... work on different tasks, surgeons all see the same view. ... suited to the specific task? In a new paper, pediatric ... Brown University and Hasbro Children,s Hospital report that in a ...
... Cancer Center have uncovered a single molecule they say ... used to treat or prevent breast cancer in high-risk ... Cancer Research , the scientists say glucose-regulated protein 78 ... the agents tamoxifen and fulvestrant, turns off apoptosis, a ...
Cached Biology News:Genes may play role in educational achievement, study finds 2Individual perspectives improve laparoscopy 2Individual perspectives improve laparoscopy 3Single protein promotes resistance to widely used anti-estrogen drugs 2Single protein promotes resistance to widely used anti-estrogen drugs 3
(Date:1/15/2014)... Niagara Thermal Products is proud to announce that ... ("B3") as the critical thermal component supplier in support ... Corps of Engineers.  B3 has developed the only comprehensive ... destroys VOCs and other chemical pollutants, allergens and organic ...
(Date:1/15/2014)... This webinar will focus on EMA ... assessment in biosimilars. , Regulatory frameworks are evolving many ... however the complex nature of biopharmaceuticals makes the demonstration ... extremely challenging. Based on the specific aspects of biosimilar ...
(Date:1/15/2014)... 15, 2014 DTS Language Services, Inc ... Web Portal for Life Science organizations who need document translations. ... subject matter of their documents in advance with a selection ... time-to-delivery of translations, often a critical factor in clinical and ...
(Date:1/14/2014)... 2014 Date: Friday, April 11, 2014 , ... Club, 1360 Almshouse Road, Warrington, Pa. , Details: ... dedicated to finding a cure for hepatitis B and improving ... its annual Crystal Ball on Friday, April 11 at Warrington ...
Breaking Biology Technology:Niagara Thermal Products LLC Selected as Critical Supplier for Buffalo BioBlower Air Purification Systems 2Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2DTS Improves Efficiency for Life Science Document Translations 2Hepatitis B Foundation to Host Annual Crystal Ball Gala 2
... 17, 2012 The " Anesthesia Drugs ... analyzes and studies the U.S. market for intravenous anesthesia drugs with ... buyers, export & import system for controlled substances in U.S. and U.S. ... in-depth TOC of   " Anesthesia Drugs ...
... clinical trial, a paralyzed woman was able to reach for and ... time in nearly 15 years by using her thoughts to ... the National Institutes of Health, is evaluating the safety and feasibility ... This is a type of brain-computer interface (BCI) intended to put ...
... 2012  Questcor Pharmaceuticals, Inc. (NASDAQ: QCOR ) ... the Company,s common share repurchase program authorization by an ... of 2008, the Company has returned $236 million to ... and preferred shares, representing approximately 27% of its shares ...
Cached Biology Technology:Anesthesia Drugs Market in U.S. worth $7 Billion by 2015: MarketsandMarkets 2Anesthesia Drugs Market in U.S. worth $7 Billion by 2015: MarketsandMarkets 3Paralyzed individuals use thought-controlled robotic arm to reach and grasp 2Paralyzed individuals use thought-controlled robotic arm to reach and grasp 3Paralyzed individuals use thought-controlled robotic arm to reach and grasp 4Paralyzed individuals use thought-controlled robotic arm to reach and grasp 5Questcor Pharmaceuticals Expands Repurchase Program 2Questcor Pharmaceuticals Expands Repurchase Program 3Questcor Pharmaceuticals Expands Repurchase Program 4Questcor Pharmaceuticals Expands Repurchase Program 5
Goat anti-VAV2 Class: Antibody Product Group: Miscellaneous Antibody...
Rabbit polyclonal to M13 Bacteriophage Coat Proteins ( Abpromise for all tested applications)....
E2F-5...
Rabbit polyclonal to Flagellin ( Abpromise for all tested applications). Antigen: Synthetic peptide from the flagellin C terminal domain of Burkholderia pseudomallei....
Biology Products: