Related Study 1 In this article, this figure states that there is significant relationship between ambient temperature and feed intake of pigs with their corresponding body weight.
This data, 45, 60, 75, 90 and 105 refers to the body weight of pigs. As we can observe, when the ambient temperature increased, feed in take decreased. Reference: Teagasc, Oak Park, Carlow ,2007 from https://en.engormix.com/pigindustry/articles/feed-intake-in-pigs-t35243.htm
Related study 2 In this study, the researchers observed the effects of air movement and ambient temperature on the health, performance and behavior of swine. They conclude that:
The air movement does not affect pig’s health Whatever ambient temperature level, air velocity increased ADFI (Average Daily Feed Intake) As ambient temperature decreases, ADG (Average Daily Intake) increases Air movement increases ADG (Average Daily Intake) Air velocity must be low to reduce heat losses and hence to improve feed efficiency.
Reference: Effect of air movement and ambient temperature on the zootechnical performance and behaviour of growing-finishing pigs, P. Massabie, R. Granier and A. Gasc. 2001