HOME >> BIOLOGY >> NEWS
Surprising link between body size and extinction risk

Most of the Australian mammals that have gone extinct in the last 200 years were medium sized, and many biologists believe that this somehow predisposed them to extinction. New research debunks this belief and reveals another link between body size and extinction: small mammals are less likely to die out.

This work is presented in the October issue of Conservation Biology by Marcel Cardillo and Lindell Bromham, who did this work at the University of Queensland, Australia, and are now at the University of Sussex, UK.

Nearly half of all the mammals that have gone extinct worldwide in the last 200 years were Australian, and most of them were medium-sized (1.2 ounces - 12 pounds). Biologists theorized that Australian mammals in this so-called "Critical Weight Range" were more prone to extinction. While this theory has been widely accepted, it had not been tested rigorously.

To test this theory, Cardillo and Bromham did the first statistical analysis of weight and extinction risk in Australian mammals. The researchers considered 25 extinct and 16 endangered species.

Cardillo and Bromham discovered that the medium-sized mammals were not at greater risk of extinction. So why are most of Australia's extinct mammals medium-sized? The answer is simple: most of Australia's mammals happen to be medium- sized.

The researchers also found a new link between size and extinction risk: the smallest mammal species are the least vulnerable to extinction. Many Australian rodents weigh less than an ounce and some marsupials weigh less than a third of an ounce. Cardillo and Bromham speculate that these small species are more robust because they have high population densities and reproductive rates, which means they can recover quickly.


'"/>

Contact: Marcel Cardillo
mcardillo@zoology.uq.edu.au
44-1273-606-755 X4234
Society for Conservation Biology
20-Sep-2001


Page: 1

Related biology news :

1. Surprising ultra-conserved regions discovered in human genome
2. Surprising role for Staphs toxic shock toxin
3. A Real Smart Asp: Snakes Show Surprising Ability To Learn
4. North America Absorbing Carbon Dioxide At Surprisingly High Rate, Team Reports
5. Proteins Interacting With RNA And DNA Are Surprisingly Similar
6. Surprising Protein Movement Seen In Cells
7. Landmark agreement between Samoa and UC Berkeley could help search for AIDS cure
8. New research suggests link between maternal diet and childhood leukemia risk
9. Fossils reveal direct link between global warming and genetic diversity in wildlife
10. Battle between bubbles might have started evolution
11. UCSD researchers are first to demonstrate molecular link between inflammation and cancer

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Surprising link between body size and extinction risk

(Date:6/17/2015)... JOSE, Calif. , June 17, 2015 /PRNewswire/ ... in human interface solutions, today announced that Xiaomi, ... adopted the Synaptics ® ClearPad ® ... of display driver integrated circuits (DDICs) for its ... Pro. By leveraging ClearPad for full in-cell display ...
(Date:6/16/2015)... 2015  With the increasing number and severity of ... concern. The recent compromise of Federal employee data ... authentication within government agencies. HYPR Corp. announced ... (OTP) authenticator, has been submitted for testing and approval ... validation for tamper proofing. The proliferation ...
(Date:6/15/2015)... 16, 2015 According to a ... Type (Rule-Based, Statistical, and Hybrid), Technologies (Recognition, IVR, OCR, ... published by MarketsandMarkets, The Natural Language Processing Market is ... of 18.4% for the forecast period 2015-2020. ... F igures spread   through 155 P ...
Breaking Biology News(10 mins):Synaptics Touchscreen and Display Driver IC Solutions Power Xiaomi's Latest Flagship Smartphones 2Synaptics Touchscreen and Display Driver IC Solutions Power Xiaomi's Latest Flagship Smartphones 3Government Ready Biometric Security Approaching as HYPR Corp. Files FIPS 140-2 Level 3 Validation for Its Proprietary Biometric Token 2Government Ready Biometric Security Approaching as HYPR Corp. Files FIPS 140-2 Level 3 Validation for Its Proprietary Biometric Token 3Natural Language Processing Market Worth $13.4 Billion by 2020 2Natural Language Processing Market Worth $13.4 Billion by 2020 3Natural Language Processing Market Worth $13.4 Billion by 2020 4Natural Language Processing Market Worth $13.4 Billion by 2020 5
(Date:7/2/2015)... ... 02, 2015 , ... Sleepless nights will become obsolete as Luzi , ... Indiegogo campaign on June 23. Sound sleepers and the sleep deprived both will love ... use, while the integration of the Bluetooth speaker, alarm clock and ability to charge ...
(Date:7/1/2015)...   Decision Resources Group finds that ... are its oral administration, alternative mechanism of action, ... rheumatologists. Otezla was the first oral therapy specifically ... psoriatic arthritis in the United States ... conventional oral treatments including disease-modifying antirheumatic drugs (DMARDs), ...
(Date:7/1/2015)... July 1, 2015  Axovant Sciences Ltd. (NYSE: ... the treatment of dementia, today announced that the ... 22 at 5:45 p.m. EDT following its presentation ... International Conference 2015 (AAIC). The ... , Dr. Lawrence Friedhoff , Chief Development ...
(Date:7/1/2015)... ... July 01, 2015 , ... Apex Therapeutics announced today that company CEO, ... PA. , The presentation took place on Tuesday, June 16 and provided ... development of APX3330 for the treatment of pancreatic cancer. A copy of the ...
Breaking Biology Technology:Luzi Smart Lamp Recently Launched Indiegogo Campaign 2Luzi Smart Lamp Recently Launched Indiegogo Campaign 3Surveyed Rheumatologists Report That Otezla's Oral Administration is its Single Greatest Advantage Over Currently Available Treatment Options 2Surveyed Rheumatologists Report That Otezla's Oral Administration is its Single Greatest Advantage Over Currently Available Treatment Options 3Axovant Sciences To Host Investor Briefing And Live Webcast During AAIC 2015 Meeting 2Axovant Sciences To Host Investor Briefing And Live Webcast During AAIC 2015 Meeting 3Apex Therapeutics Presented Company Overview at This Year’s BIO International Convention in Philadelphia, PA 2
Cached News: