Navigation Links
Research indicates coyote predation on deer in East manageable
Date:5/9/2014

Coyotes are a major predator of white-tailed deer across the East, especially fawns born each spring, but wildlife managers nonetheless are able to stabilize and even grow deer herds, according to researchers in Penn State's College of Agricultural Sciences.

Coyotes -- Canis latrans -- are a relatively recent arrival to eastern North America, appearing first in the region in noticeable numbers in the 1970s. They are a significant source of deer mortality and most often prey on whitetails in the earliest months of their lives. Coyotes have long inhabited the American West.

With the range expansion of coyotes eastward, and their crossbreeding with gray wolves (Canis lupus) along the way, Eastern coyotes are larger than their Western counterparts. Many people are concerned that their predation may be adversely affecting Eastern deer populations. Recently, lawmakers in Pennsylvania proposed placing a bounty on coyotes to incentivize their destruction for the sake of deer.

In response to those concerns, researchers initiated a study to look at deer and coyote populations from southeastern Canada through the mid-Atlantic region to the Southeast. Using published study data from throughout eastern North America that included fawn mortality, adult doe survival and reproductive rates -- and even the effects of severe winter weather on deer survival and predation -- researchers studied how deer populations responded to changes in predation and hunter harvest.

The research, published in the May issue of the Journal of Wildlife Management, aimed to determine whether managers can compensate for coyote predation of white-tailed deer.

"The concern is that coyotes may be changing the established population dynamics of white-tailed deer herds through increased predation on fawns," said Duane Diefenbach, adjunct professor of wildlife ecology and leader of the Pennsylvania Cooperative Fish and Wildlife Research Unit based at Penn State. "If that's true, then deer managers need to adjust how they make harvest-management decisions, because manipulating doe harvests is typically how wildlife agencies maintain, increase or decrease deer populations."

The study showed that coyote predation -- even at the highest levels reported -- is not significant enough to cause deer populations to decline if doe harvests are reduced. In fact, in most places in North America, continued doe harvest is required to stabilize deer populations.

Diefenbach said the only place in which that might not be true is the Southeast, where wildlife managers have found the highest predation rates on fawns by coyotes. In that region, an average of only one in four fawns survives to three months of age. But that is only in combination with extremely low doe-survival rates.

"However, we couldn't find any published research on adult-doe-survival rates in the Southeast, so it is possible that if doe hunting were stopped, deer populations would stabilize despite the heavy predation."

Mortality of white-tailed deer fawns is significant across the East, Diefenbach noted. Only an average of one in two survives its first three months of life, which is when most mortality occurs. Predation by coyotes, black bears and bobcats accounts for most mortality. Regardless, the number of fawns that survive generally is adequate to sustain nearly all populations.

"Besides predators, the other major source of mortality in fawns is hunting," said Diefenbach. "Thus, reduced hunting can be used to offset mortality from natural predators. Enough fawns survive all sources of mortality that we still need to harvest antlerless deer to maintain stable deer populations. There is little evidence to date that the increase in coyote predation could create a crisis that could not be solved by wildlife managers simply responding with reductions in antlerless deer harvests."


'/>"/>

Contact: A'ndrea Elyse Messer
aem1@psu.edu
814-865-9481
Penn State
Source:Eurekalert  

Related biology news :

1. Researching an endangered relationship
2. Oregon researchers capture handoff of tracked object between brain hemispheres
3. 35 scientists receive early career research program funding
4. Pesticides: Research provides new insights into their effects on shrimps and snails
5. Homemade stink bug traps squash store-bought models, Virginia Tech researchers find
6. IU biologists receive $6.2 million to advance research on bacterial evolution
7. Ability to isolate and grow breast tissue stem cells could speed cancer research
8. Ban cigarette filters to save the environment, suggest researchers
9. GW researcher looks inside the box for a sustainable solution for intestinal parasites
10. University of Toronto researchers find seeing Jesus in Toast phenomenon perfectly normal
11. Which came first, bi- or tricellular pollen? New research updates a classic debate
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Research indicates coyote predation on deer in East manageable
(Date:2/1/2016)... Fla. , Feb. 1, 2016  Wocket® smart wallet ( www.wocketwallet.com ... and television personality, Joey Fatone . Las Vegas ... greet fans. --> Las Vegas , where ... --> The new video ad was filmed at the Consumer ... appeared at the Wocket booth to meet and greet fans. ...
(Date:1/27/2016)... 2016  Rite Track, Inc. a leading semiconductor equipment ... Chester, Ohio announced today the acquisition of PLUS ... in Austin, Texas , will significantly ... modifications, installations and technical support offerings for TEL Track ... commented, "PLUS has provided world class service including refurbishment, ...
(Date:1/25/2016)... , Jan. 25, 2016  Glencoe Software, the ... pharma and publication industries, will provide the data management ... Centre (NPSC). ... Phenotypic analysis measures ... whole organisms, allowing comparisons between states such as health ...
Breaking Biology News(10 mins):
(Date:2/5/2016)... 5, 2016 On Thursday, February 11, ... for community, health and disaster services, and the ... to enhance care coordination and service delivery for the ... need and to better connect service providers to the ... San Diego has handled more than ...
(Date:2/5/2016)... , Feb. 5, 2016 Australian-US drug discovery and ... today the appointment of a new Chairman, Mr John ... , effective immediately. James Garner , has ... Director and former Acting CEO, Mr Iain Ross , ... Director. --> James Garner , has also been ...
(Date:2/4/2016)... -- - New FDA action date of July ... date of July 22, 2016   --> ... 2016   - Lifitegrast has the potential ... the treatment of signs and symptoms of dry eye disease in ... be the only product approved in the U.S. in the past decade indicated for the ...
(Date:2/4/2016)... ... February 04, 2016 , ... Shimadzu ... quad LC-MS, host live demos and poster sessions, and present on the analysis ... conference takes place March 6 to 10 at the Georgia World Congress Center ...
Breaking Biology Technology: