Abstract
1. Two adult female badgers were water-deprived and/or fasted during the last one-half to two-thirds of pregnancy while a third pregnant female received water ad libitum and was fed meat and dog food. 2. The litter size, birth weights, post partum energy consumption, growth rate, development of homeothermy, tooth eruption and date of weaning, as well as other developmental characteristics, were not significantly different between cubs born to the fed or fasted mothers. 3. The energy demands for gestation are apparently small and are accommodated by fat reserves during periods of food deprivation. However, the calculated energy for lactation is 16 times that of gestation, which is quadruple the expenditure for most mammals. 4. As a result of delayed implantation, the length of gestation and litter weights of badgers are considerably below those predicted from allometric equations. 5. The period of lactation is therefore extremely critical to the survival of both the cubs and lactating adults which require heavy fat stores and possibly torpor to ensure sufficient energy availability during prolonged winter food shortage.
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