Communal nesting, the sharing of parental responsibilities between multiple individuals in a
nest, is common in many rodents. Upon first glance, this behaviour seems to be selectively …

Female mammals sometimes nurse offspring that are not their own. The causes and function
of allonursing for females remain puzzling given that lactation is energetically costly and …

Abstract.—The disposable soma theory suggests that aging occurs because natural
selection favors a strategy in which fewer resources are invested in somatic maintenance …

Cooperative behavior is a hallmark of the primate order. Cooperation is therefore an area of
intensive theoretical research in biology, anthropology, political sciences and economics, as …

Time-averaged sustained metabolic rates (SusMRs) of humans and wild animals have been
observed not to exceed about seven times basal metabolic rate (BMR), which suggests a …

Laboratory mice (strain MF1) were used to determine whether sustainable rates of energy
intake are limited during lactation. Mice raising natural-sized litters (N= 71) reached an …

Juvenile mortality in cheetahs was found to be extremely high compared to other large
mammals, with approximately 72.2% of litters dying before they emerged from the lair at …

Lactation imposes substantial physiological costs on mothers and should therefore not be
directed towards foreign offspring. Such allonursing, however, is common in mammal …

Although natal dispersal has received considerable attention from animal ecologists, the
causes and consequences of breeding dispersal have remained largely unexplored. We …

1. The energy budgets of lactating and non‐reproductive female Brown Long‐Eared Bats
fed primarily on noctuid moths (≈ 27· 2 kJ g–1) were constructed and compared in flight …