Navigation Links
Extinction Risk of Grazing Animals Depends on Reproductive Speed

A new study by researchers from the National Evolutionary Synthesis Center in Durham, North Carolina, US, has revealed how reproductive speed prevents large grazing animals such as deer and antelope, that are regularly hunted by humans, from becoming extinct.

The study revealed that though habitat loss and living in a limited geographic area does pose significant risks for extinction of a species, but under pressures of hunting, it's reproductive speed with which they proliferate that really matters; the slower the reproductive cycle, the higher the risk of extinction for large grazing animals, said evolutionary biologist Samantha Price, a postdoctoral fellow at the National Evolutionary Synthesis Center in Durham, North Carolina.

According to her, this key variable also explains, for example, why the American bison was nearly wiped out in just a few years of intense hunting pressure, with relatively slight habitat change, compared to the white-tailed deer that continued to grow in large numbers despite hunting and suburban sprawl.

The bison nurses its young for 283 days on average; the deer just 80, said Price in her study, which appears online in the May 16 issue of the journal Proceedings of the Royal Society B.

As part of her study, Price did a complex statistical analysis of 144 species of hoofed mammals, including pigs, llamas, cattle, sheep, goats and antelopes, combining a global list of threatened species with data on hunting, land use and the animals' reproductive rates.

She found that where hunting isn't a factor, habitat loss is the biggest issue. But whether the threat comes from hunting or habitat destruction, extinctions are "all human-caused at some level".

The worst-case scenario, she said, is where humans are expanding into an area and changing its habitat, and hunting the indigenous animals as they go.

Three areas of the world - West Africa, Indone sia and Malaysia, and South America - are "hot spots" for hunting, and many species in these areas are threatened. The poorer the country, the greater the threat," she said.

According to her, regional military conflicts also turn up the heat on species, as people in strife-torn areas increasingly turn to "bush meat," including hoofed animals, to supplement their diets.

"Since these are large, plant-eating animals, they have a significant effect on the local ecology. These animals help disperse plant seeds through their manure and keep plant growth in check. You can completely change the ecosystem without knowing it if you hunt these animals to extinction," Price said.


'"/>




Related medicine news :

1. Poisonous Gas Caused Mass Extinction
2. Global Warming Will Result In the Extinction Of Amphibians
3. Tribals in the Brink of Extinction due to Malnutrition and Diseases
4. One-sixth of Europes Mammals Face Extinction, Warns Conservation Experts
5. Animals Can give us a second chance at life
6. Animals can give us a second chance at life
7. Kidneys Can Be Transplanted From Animals Such As Pigs In Future
8. Diseases in Marine Animals Could Portend Unhealthy Prognosis for Humans
9. Regulators Object Drug Produced from Genetically Engineered Farm Animals
10. Japanese-Indonesian Joint Venture To Produce Bird Flu Vaccine For Farm Animals
11. Species Linking Fish And Land Animals Found
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:10/13/2017)... , ... October 13, 2017 , ... ... throughout Arkansas that offers insurance and financial preparation services, is providing an update ... City Rescue organization. , Rock City Rescue is a locally recognized nonprofit that ...
(Date:10/13/2017)... ... October 13, 2017 , ... The American Board of Family ... next President and Chief Executive Officer, succeeding Dr. James C. Puffer upon his retirement. ... 1, 2018 until Dr. Puffer’s retirement at the end of 2018. Upon assuming the ...
(Date:10/13/2017)... ... October 13, 2017 , ... Southern ... and Jennifer Huggins, PharmD ’17, along with clinical associate professor Janice Frueh, ... cardiovascular diseases during the 15th Annual Women’s Health Conference. The SIU School ...
(Date:10/13/2017)... LUIS OBISPO, Calif. (PRWEB) , ... October 13, 2017 , ... ... Alzheimer’s or dementia. However, many long-term care insurance companies have a waiver for care ... is the 90-day elimination period, when the family pays for care, is often waived, ...
(Date:10/13/2017)... , ... October 13, 2017 , ... Global Healthcare Management’s ... Alexandria Park in Milford, NJ. This free event, sponsored by Global Healthcare Management’s ... The fun run is geared towards children of all ages; it is a ...
Breaking Medicine News(10 mins):
(Date:10/12/2017)... AVACEN Medical , Inc. (AVACEN) announced that ... New Product Innovation Award for Its fibromyalgia pain management ... medical device market research by Frost & Sullivan,s industry experts. ... pain relief product, the AVACEN 100, offers a safe and ... pain. ...
(Date:10/11/2017)... 2017  True Health, a leader in integrated ... during National Breast Cancer Awareness month to educate ... Research recently published ... more than 10 million American women are at ... or BRCA2 and have not had testing. These mutations ...
(Date:10/5/2017)... 2017  In response to the nationwide opioid ... Surgeons (AAOMS) released prescribing recommendations that urge ibuprofen ... as a first-line therapy to manage a patient,s ... Recognizing the value and importance of ... Prescribing: Acute and Postoperative Pain Management" stresses that ...
Breaking Medicine Technology: