Improving the robustness of pig production in the face of extreme weather events

GOALS

While many studies have attempted to measure the consequences of global warming on agriculture, this exercise had not been conducted for pig production. This has now been corrected through the PIGCHANGE project -Assessment of the impact of climate change on the French pork industry. “Pig producers don’t feel concerned yet, but they will have to anticipate in order to be able to adapt and safeguard their income,” explains David Renaudeau, of the Pégase research team in Rennes, Brittany. “For the first time, our work has made it possible to quantify the degree of vulnerability of farms and suggest solutions.”

Heat waves in 2080

Researchers projected themselves forward to 2080, when episodes of extreme heat will be more frequent, bringing with it consequences on animal performance and well-being. In these conditions, pigs regulate their temperature by decreasing their production of metabolic heat, in other words, they eat less.

Researchers used a model to evaluate the impact of global warming on the thermal environment in buildings housing pigs and on animal performance. In addition, two production scenarios were considered, one based on the current socio-economic context and the other simulating different changes in the purchase price of feed and the sale price of carcasses. This work is the result of a collaboration between geneticists, nutritionists, climatologists, mathematicians, Météo-France and IFIP, France’s pig institute.

Feed and building management

And the results? “Considering the evolution of the production system, the impact of global warming will be reasonable, at least in the short term, because it will be partially offset by progress in genetic selection,” says David Renaudeau. “However, the seasonality of animal performance will be more noticeable, in connection with warmer and longer summers. These uncertainties may have an impact on performance if the producer does not anticipate them.” Among the solutions:

• feed composition, precision feeding and improvements to the management of the environment of livestock buildings.
• One of the challenges for PIGCHANGE is to transfer the results to those working in the sector. “The objective is to provide elements for dialogue with producers."
• "This work is also international in its scope because half of the world’s pork production is in hot regions, such as South-East Asia and South America.”

Contact

David Renaudeau

Pégase Joint Research Unit, INRAE Rennes