In contrast, other studies (Dvorak & Bray, 1978;
Howlinder & Rose, 1989; Eberhart & Washburn,
1993) indicate that lowering the ambient
temperature significantly stimulates f~ed
consumption. Hurwitz et al. (1980) suggested that
the decline in food intake may be derived from
diminishing energy requirements for maintenance
as temperature increases up to 27°C, in correlation
with decreased oxygen consumption (Barrot &
Pringle, 1946) or heat production (Farrel & Swain,
1977). The intake and metabolism of feed have a
thermogenic effect.