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University of Guelph researchers create tool to manage urban cat population crisis

February 28, 2018

Accurate numbers are the cat's pyjamas when it comes to solving the current cat population crisis. But measuring the feline population has been difficult, until now.

University of Guelph scientists have developed a dynamic population model that crunches accumulated data from several sources to predict overall cat numbers in a community.

The promising new approach could improve the way urban cat populations are understood and managed in communities around the world.

"There seems to be a growing concern around trying to manage cats in cities, particularly outdoor and stray cats," said Prof. Jason Coe, Department of Population Medicine. "Yet we have very few tools or methods that enable us to know what the population actually is or that help us understand how we might manage these populations."

There are about 100 million owned cats and an estimated 10 million to 120 million free-roaming and feral cats in North America.

Published in the journal PLOS ONE, the new model accounts for overall cat population dynamics and is the first to examine the three subpopulations - owned cats, unowned or stray cats, and cats in the shelter system, said Coe.

These groups contribute to the general population of cats in any community, he added, given that human actions such as cat adoption from an animal shelter or cat abandonment result in a fluctuating population.

"This new model offers communities a tool that allows them to address societal needs, questions and issues related to cat populations," said Tyler Flockhart, who worked on the study with Coe as a post-doctoral researcher and is now a professor at the University of Maryland's Center for Environmental Science.

The main concerns the population model addresses is cat welfare and the management of outdoor and stray cats.

Strays and outdoor cats face numerous challenges, including disease susceptibility, food insecurity, lack of adequate shelter and vulnerability to predators. In addition these animals affect the natural environment by threatening birds and other wildlife and by spreading disease.

"If, for example, we have concerns about feral cats in a community, this model will help us humanely approach this issue with resources, time and effort in the most accomplishable way," said Coe, holder of the Nestlé Purina PetCare Canada Chair in Communications, which focuses on pet relinquishment, positive pet behaviour and pet overpopulation. "It's about creating healthy animal populations and doing things in a humane manner."

Coe and Flockhart said the tool, which requires city-specific inputs, can help communities with specific challenges. A municipality may need to address the cost of stray cat management.

Accurate numbers can help that community direct spending to a specific area, while identifying appropriate interventions and when and where to apply them.

With accurate population numbers, cities can tackle factors influencing cat populations such as human activity, said Flockhart. People play a key role in cat population dynamics, primarily through adoption or abandonment, he added.

Knowing how human actions affect the feline population is vital to improving cat welfare and understanding the environmental impacts of the cat population, said Flockhart.

"We need to think about what humane actions we can take that will help us reach our objectives."
-end-


University of Guelph

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