
Fig. 4. Maternal asymptotic daily food intake per pup (food intake averaged over days 1316 of lactation) in relation to litter size in females raising natural (filled symbols) and manipulated (open symbols) litters. Each point is one litter. The relationship is described by y=-0.18x+4.18 for the control females and by y=-0.19x+4.41 for those with manipulated litters.