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Dr. Adrian Treves spoke to Congressional staff on Capitol Hill in Washington, D.C. on March 6th, 2018. Senators Cory Booker and Tom Carper hosted the briefing, entitled, Effective Non-Lethal Methods for Protecting Livestock from Predators.Please see the link in red above for a list of speakers.

FEE notice
Treves, A., Krofel, M., McManus, J. (equal co-authors).2016. Predator control should not be a shot in the dark. Frontiers in Ecology and the Environment14: 380-388.

Click here for short video explaining the findings

A new scientific article showing most hallmarks of science missing from North American wildlife hunting and trapping plans. infographic
Artelle, K.A., Reynolds, J.D., Treves, A. Walsh, J.C., Paquet, P.C., Darimont, C.T. 2018. Hallmarks of science missing from North American wildlife management. Science Advances. 2018.

Click here for short video explaining the findings

Treves, A., K. A. Artelle, C. T. Darimont, W. S. Lynn, P. C. Paquet, F. J. Santiago-Avila, R. Shaw and M. C. Wood (2018). Intergenerational equity can help to prevent climate change and extinction. Nature Ecology & Evolution. Click here for Supporting Data.

@BurgessartCredit: Jen Burgess @jenburgessart illustrated the Waterman butterfly projection.

Credit: Jen Burgess @jenburgessart

Credit: Jen Burgess @jenburgessart

Santiago-Avila, F.J., Cornman, A.M., Treves, A. 2018. Killing wolves to prevent predation on livestock may protect one farm but harm neighbors. PLOS One. https://doi.org/10.1371/journal.pone.0189729.

Chapron, G. and A. Treves 2016a and b, 2017a and b. We first showed that Michigan and Wisconsin wolf population growth slowed whenever the government liberalized wolf-killing and the slow-down was proportional to the length of time that culling was liberalized, regardless of how many wolves were killed.
Then starting a lively debate, Pepin et al. tried to counter our hypothesis but did not succeed in our opinion. That debate improved our model which strengthened its findings, also in the pages of Proceedings of the Royal Society B in a 2016 correction that showed the probability that culling slowed population growth was 92%. and a 2017 rebuttal. Then Stien, Olson, and his colleagues tried again. Those critiques only made our evidence stronger. Olson et al. in particular weakened their own position. Furthermore, Chapron and Treves were pleased to hear of independent findings for Mexican wolves presented by David Parsons in 2014.

For quick summaries of the carnivores we work with, click on the names below.

learn about wolves learn about bears

learn about tigers learn about pumas

learn about East African Carnivores

Large carnivores are the most challenging species with which to coexist. For millions of years, they competed with our ancestors for food and space. Humans were generally subordinate in this struggle. But, the past few hundred years have seen the tables turned. Now humans cause most carnivore mortality worldwide. We have degraded ecosystems as a result because large carnivores play essential roles in maintaining functioning, diverse ecosystems. Therefore large carnivores are among the most challenging to conserve.

Two species of large carnivores have gone extinct in recent times and most have suffered major population reductions. Loss of large carnivores disrupts ecosystems and depletes biodiversity, because of cascading influences on prey and smaller-bodied carnivores. The larger species of carnivores typically require vast areas to survive, thereby competing indirectly with people for space and resources. Direct competition is also apparent when carnivores prey on livestock or damage crops when people retaliate by clearing habitat or killing carnivores. Human causes of mortality predominate in virtually all large carnivore populations.

Mainly, people retaliate against carnivores for real and perceived threats to property, safety, or game. Thus, carnivore conservation has often depended on reducing human causes of mortality. Both private citizens and governments are implicated. Government-sponsored bounties, pest eradication campaigns, and trophy hunts extirpated carnivores across vast areas of many countries. Even in the last decade, private eradication efforts have occurred in many localities.

Large carnivores can be conserved within human-dominated areas, while also protecting people's livelihoods and safety. The solutions are never simple; indeed they can be maddeningly complex. But when we combine local knowledge with technical support and state-of-the-art research, we can balance the needs of people and wildlife.

Dr. Adrian Treves founded the Carnivore Coexistence Lab in April 2007. The following web pages outline CCL's current research efforts along with a sample of our recent findings.