Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Helping carnivores and people co-exist

25.11.2003


Keeping predators at bay with flashing lights and loud noises instead of bullets



When wolves and other large carnivores threaten people and livestock, wildlife managers often resort to killing them. But now there’s hope for a non-lethal solution to controlling carnivores. New research shows that movement-activated guards with strobe lights and sound recordings can help keep wolves and bears away.

"High-technology devices are much more expensive, complicated and limited in effectiveness than a single bullet from a high-powered rifle, but they also allow a predator to live - surely the goal of conservation," say John Shivik of the United States Department of Agriculture, Wildlife Services, National Wildlife Research Center and Utah State University in Logan; Adrian Treves, who did this work while at Conservation International in Madison, Wisconsin, and is now at the Wildlife Conservation Society in Bronx, New York; and Peggy Callahan of the Wildlife Science Center in Forest Lake, Minnesota.


This work is part of a six-paper special section co-edited by Treves on the conflict between people and carnivores in the December issue of Conservation Biology.

Conflicts between people and carnivores are rising as people spread into remote habitats and as large carnivores recover from past eradication efforts. While wildlife managers often address these conflicts by killing "problem" animals, this runs counter to conservation efforts and could impede the recovery of rare carnivores. "To promote the existence and expansion of large carnivores, conservation biologists should assist with the real-world problems predators cause," say the researchers.

To help find non-lethal ways of controlling carnivores, Shivik and his colleagues did two experiments to see if movement-activated devices could deter predators from feeding. First, the researchers compared the predators’ consumption of road-killed deer carcasses before and after treating them with movement-activated guards. This experiment was done on wild predators including wolves and bears in northwest Wisconsin; the carcasses were replaced regularly; the pre-treatment and treatment periods ranged from roughly a week to a month; and the movement-activated guards had strobe lights and recordings of 30 sounds, including yelling, gunfire and helicopters.

In the second experiment, the researchers compared wolves’ consumption of sled-dog chow before and after treating it with movement-activated guards. This experiment was done on captive wolves at the Wildlife Science Center in Forest Lake, Minnesota, and the researchers determined how much of a 1-kg portion of sled-dog chow the wolves ate in an hour.

Both experiments showed that the movement-activated guards deterred the predators from feeding. In the experiment with wild predators, the movement-activated guards decreased the consumption of deer carcasses by about two-thirds (from roughly 3.3 to 1 kg per day). Similarly, in the experiment with captive wolves, the movement-activated guards decreased the consumption of dog food by about three-quarters (from roughly 0.8 to 0.2 kg).

The movement-activated guards have some drawbacks: they do not keep the predators away completely, and they are too costly and complicated to be feasible for many wildlife managers. Even so, movement-activated guards are still promising. "Non-lethal approaches to managing predation ...provide a means for conservation biologists to target areas with high predation levels and increase acceptance of large mammalian predators," say Shivik and his colleagues.

CONTACT:

John Shivik: 435-797-1348, 435-245-6091, john.shivik@aphis.usda.gov)
Adrian Treves: 718-741-8197, atreves@wcs.org)

John Shivik | Society for Conservation Biology
Further information:
http://www.conbio.org/SCB/Services/Tips/2003-12-Dec.cfm

More articles from Ecology, The Environment and Conservation:

nachricht When corals eat plastics
24.05.2018 | Justus-Liebig-Universität Gießen

nachricht Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>