Navigation Links
Wolves lose their predatory edge in mid-life, new U of Minnesota study shows
Date:10/26/2009

Although most wolves in Yellowstone National Park live to be nearly six years old, their ability to kill prey peaks when they are two to three, according to a study led by Dan MacNulty and recently published online by Ecology Letters. The study will appear in the journal's December print issue.

The finding challenges a long-held belief that wolves are successful predators for their entire adult lives. It now appears that like human athletes, they are only at the top of their game for about 25 percent of that time. It also shows that physiology can limit predation.

"Wolves are not perfect predators," says MacNulty, a postdoctoral researcher in the College of Biological Sciences' Department of Ecology, Evolution and Behavior. "They lack physical characteristics to kill prey swiftly, so they rely on athletic ability and endurance, which diminishes with age. They're like 100-meter sprinters. They need to be in top condition to perform."

By comparison, mountain lions, with their short snouts, powerful muscles and retractable claws, are designed to kill, MacNulty says. Not surprisingly, they live and hunt alone.

In Yellowstone, wolves, who hunt in packs, depend on elk for survival. The finding is timely because the park's elk population is shrinking and wolves are being blamed. Wolves were hunted out of the area in the 1930s and re-introduced in 1995. But the study shows there isn't a strong correlation between the number of wolves in the park and the number of elk killed.

MacNulty says that number fluctuates based on the age structure of the wolf population at any given time. The higher the proportion of wolves over age three, the lower the rate at which they kill elk. For every 10 percent rise in the proportion of wolves older than three, the kill rate declined 10 to 15 percent. He notes that the drop in the elk population is also attributable to drought and to Grizzly Bears.

"Wolves are not the sol
'/>"/>

Contact: Patty Mattern
mattern@umn.edu
612-624-2801
University of Minnesota
Source:Eurekalert

Page: 1 2

Related medicine news :

1. Courage Center Jr. Rolling Timberwolves to Defend #1 Ranking at National Tournament March 18-22
2. Iberian wolves prefer wild roe deer to domestic animals
3. One-fourth of HIV patients believe their doctors stigmatize them
4. Father and Daughter From Tanzania Receive Their First Medical Examination in Newport Beach
5. Teens need to see their doctors more often
6. Can brain-injured, partially-blind stroke patients regain some of their lost vision?
7. Scientists explain how insulin secreting cells maintain their glucose sensitivity
8. When Should Children Wash Their Hands?
9. UCLA/RAND study shows that many children of HIV-positive parents are not in their custody
10. National Association for Home Care & Hospice (NAHC) Members Take Their Case to Capitol Hill
11. Nurses describe dedication, frustration associated with their jobs
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/25/2014)... Angeles, CA (PRWEB) July 25, 2014 In ... talk about, and eager to reverse the symptoms associated with ... in the media at large, a new case study ... real benefits of testosterone therapy using bioidentical hormones. ... a 38-year-old father from Seattle who found himself beginning to ...
(Date:7/25/2014)... As reported by the New Orleans Advocate ... (7/3), the state of Louisiana has recently seen a ... than cocaine. Officials believe the increase is due to a ... of marijuana. However, both doctors and police confirm that that ... to call it “poison,” doctors have acknowledged that the Louisiana ...
(Date:7/25/2014)... 2014 Sport Court® provided ... Nike National Invitational Tournament (NIT) in Chicago ... Junior National Tournament (USJN) in Washington D.C. at ... for these prestigious national tournaments included 44 Sport Court ... of playing surface at McCormick Place for the NIT, ...
(Date:7/25/2014)... Houston, TX (PRWEB) July 25, 2014 ... Annual Family Fun Fest on Sunday, July 27 at ... franchises include Memorial, Copperfield, Katy, Pearland, Friendswood, Spring, ... location in The Heights. , “We’re thrilled to ... this year,” said Heather Belcher who owns the Sugarland-Missouri ...
(Date:7/25/2014)... July 25, 2014 A new study conducted ... revealed that 39 percent of all children in the survey under ... The survey looked at 2,505 children during the years of 2011 ... years of age. The final result was that about two ... Many of these children were from lower-income families and were of ...
Breaking Medicine News(10 mins):Health News:New Case Study Highlights Effectiveness of Testosterone Therapy in Fighting Weight Gain and Fatigue 2Health News:New Case Study Highlights Effectiveness of Testosterone Therapy in Fighting Weight Gain and Fatigue 3Health News:Louisiana Recognizes Dangers of Synthetic Marijuana 2Health News:Sport Court Provides All Sports Flooring for Basketball Events in Chicago and Washington D.C. 2Health News:The Little Gym of Houston to Attend Houston Family Magazine’s Family Fun Fest 2014 2Health News:North York Dental Provides Services to Toronto Children in Light of Growing Demand 2Health News:North York Dental Provides Services to Toronto Children in Light of Growing Demand 3
... UCSF institute aimed at accelerating the pace of translating ... million from the National Institutes of Health to expand ... UCSF Clinical and Translational Science Institute (CTSI) is among ... recognition of their successes during the first five years ...
... HealthDay Reporter , MONDAY, July 18 (HealthDay News) -- ... of mild cognitive impairment, a potential precursor of Alzheimer,s ... there may be a very high rate of cognitive ... general population in that age range," said lead researcher ...
... , FRIDAY, July 15 (HealthDay News) -- Although many people ... relationship between stress and alcohol is a two-way street, researchers ... stress, the authors of a new study pointed out. Meanwhile, ... individuals to drink more to produce the same effect. As ...
... (HealthDay News) -- Compared with older people with no signs of ... twice as likely to experience a fall, researchers have found. ... older adults who were participating in a study of memory and ... many times they fell over the course of eight months. ...
... 2011) Today at the 6th International AIDS ... Prevention, the Drugs for Neglected Diseases initiative (DNDi) ... programme to address critical unmet treatment needs of ... in young children has largely been eliminated in ...
... York University,s Department of Chemistry and NYU Langone Medical ... a protein implicated in many types of cancer. The ... journal Nature Chemical Biology. The ... RTK signaling is a major underlying cause of various ...
Cached Medicine News:Health News:UCSF receives $112 million to help translate science into cures 2Health News:UCSF receives $112 million to help translate science into cures 3Health News:UCSF receives $112 million to help translate science into cures 4Health News:Ex-NFL Players May Face Higher Brain Damage Risk, Study Says 2Health News:Ex-NFL Players May Face Higher Brain Damage Risk, Study Says 3Health News:Ex-NFL Players May Face Higher Brain Damage Risk, Study Says 4Health News: Drinking Alcohol May Prolong, Not Relieve, Stress 2Health News:Falls Could Signal Early Alzheimer's Disease 2Health News:DNDi launches new drug development program to address treatment needs of children with HIV/AIDS 2Health News:DNDi launches new drug development program to address treatment needs of children with HIV/AIDS 3
(Date:7/25/2014)... MISSION, Kan. , July 25, 2014 /PRNewswire-iReach/ ... , and TCGRx, of Powers Lake, ... exclusive partners in a distribution and co-marketing agreement ... to retail pharmacies throughout the United ... of robotics-based pharmacy management and workflow systems to ...
(Date:7/25/2014)... GrowBLOX Sciences, Inc. (OTCQB: GBLX) is pleased to ... with LaurelCo, LLC, an Illinois limited ... and dispensary medical marijuana licenses in the state of ... acquire a 20% equity interest in LaurelCo, LLC in exchange ... chambers, as well as all technology related to the machines ...
(Date:7/25/2014)... 25, 2014  Acsis Inc., the market leader ... solutions, has recently posted an article, "Future ... and future needs for companies, extended supply chain, ... chain model no longer work today.  The article ... growth of mobile technology, machine to machine (M2M) ...
Breaking Medicine Technology:ScriptPro and TCGRx Integrate Pharmacy Automation Technologies 2ScriptPro and TCGRx Integrate Pharmacy Automation Technologies 3GrowBLOX Sciences, Inc. Partners with LaurelCo, LLC to Obtain Licenses to Cultivate and Dispense Medical Marijuana in Illinois 2GrowBLOX Sciences, Inc. Partners with LaurelCo, LLC to Obtain Licenses to Cultivate and Dispense Medical Marijuana in Illinois 3Acsis Addresses Questions on the Modern Supply Chain 2
... 17 Oxygen Biotherapeutics, Inc. (OTC Bulletin Board: OXBT) ... Oxygen Concentrate Gel to customers who have pre-ordered through ... today, cover orders received through early November. , "This ... actually shipping a product to customers and generating revenue ...
... , REYKJAVIK, Iceland, Nov. 17 deCODE ... has filed a voluntary petition for relief under Chapter 11 ... Bankruptcy Court for the District of Delaware to facilitate the ... to operate its business and manage its properties as a ...
Cached Medicine Technology:Oxygen Biotherapeutics, Inc. Begins Shipping Cosmetic Product to Customers 2deCODE genetics, Inc. Files Voluntary Chapter 11 Petition to Facilitate Sale of Assets 2deCODE genetics, Inc. Files Voluntary Chapter 11 Petition to Facilitate Sale of Assets 3deCODE genetics, Inc. Files Voluntary Chapter 11 Petition to Facilitate Sale of Assets 4
... integrates drug infusion,with patient monitoring and ... modular platform. With multiple configuration,options, you ... you,need them, keeping the number of ... while managing the unique needs of,each ...
... These specialty Eraser instruments have been ... with the right tool for situations ... a series of 25 gauge intraocular, ... discrete treatment of target tissues for ...
... the first steps any hospital or health ... most powerful, most effective tools available for ... world-class clinician documentation and electronic medical record ... achieve this goal. In fact, its the ...
... instruments have been designed to provide ... tool for situations requiring precise hemostasis. ... 25 gauge intraocular, bipolar, diathermy instruments. ... target tissues for fine-tip hemostasis or ...
Medicine Products: