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Temperature and air pollution affect cattle mortality
V. Egberts, G. van Schaik, B. Brunekreef and others
Preventive Veterinary Medicine (2019) 168, 1–8
• What did the research find?
Both high and low temperatures were associated with increased mortality among unweaned calves aged between 15 and 55 days. However, only low temperatures were associated with increased mortality in weaned calves (aged between 56 days and one year), and only high temperatures were associated with increased mortality in newborn calves and lactating cattle. Associations between air pollution and mortality were less evident, although increased ozone levels appeared to increase mortality risk in cattle of all ages.
• How was it conducted?
Daily data on cattle mortality, weather conditions and mean levels of particulate matter, ozone, ammonia and nitrogen dioxide in the Netherlands between 2012 and 2017 were collected from national databases. Associations between mortality and environmental factors were investigated with a time series regression using distributed lag non-linear models.
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