Heat and Cattle: How Hot Weather Changes Their Daily Routine

Cattle in Alberta, Canada, faced unusually high temperatures in 2021. This affected their daily activities. Researchers used devices called pedometers on the legs of beef heifers and cows with calves to track their movements. They found that when it was really hot, the cattle changed their routines. They moved more at night and midday, but less in the morning and afternoon. This was especially true when the temperature-humidity index (THI) was high. The THI is a measure that combines temperature and humidity to show how hot it feels. The study found that when the THI was below 54 or above 70, the cattle moved more. This shows that heat affects how cattle behave. The study also found that heifers and cows behaved differently. Heifers moved more in the summer, but cows were more active in the fall. Cows also rested less during this time. This could be because they had calves with them, which might have made them more active. The researchers used a method called regression tree analysis to find these patterns. This method helps to understand how different factors, like heat, affect cattle behavior.The findings are important for understanding how cattle behave in different weather conditions. This can help farmers make better decisions about how to care for their cattle. For example, they might need to provide more shade or water during hot weather. However, more research is needed to fully understand how heat affects cattle behavior, stress, and meat production. This is especially important as the climate continues to change. One interesting point is that the study only looked at cattle in a specific area of Canada. It would be helpful to see if similar patterns occur in other places. This could help us understand if the findings are true for all cattle or if there are differences based on location. Additionally, the study did not look at how heat affects other types of livestock, like sheep or pigs. It would be interesting to see if they behave differently in hot weather.