Fig. 5. Litter size (A), litter mass (B) and pup body mass (C) as a function of maternal body mass for mice at 30°C raising 6-15 pups (filled circles; N=61). Data for mice raising 1-5 pups are also shown (open circles; N=6). Litter size, litter mass and pup body mass are those on day 14 of lactation. Pup body mass is the litter mass divided by litter size. Maternal body mass is the mean value for days 9-13 of lactation. The relationships are described by y=6.40+1.33x (B) and y=-0.31+0.15x (C).