Fig. 5. Serum leptin levels across non-reproductive (NR) and lactating females
exposed to 23°C (warm) and 5°C (cold). Values are means ±
s.e.m. (N=8). Values that share different letters are significantly
different at P<0.05. Serum leptin levels decreased significantly
in the lactating voles, while cold exposure decreased serum leptin levels only
in the non-reproductive voles, but did not in the lactating voles.