Mammals and birds provide food for their young after birth, but such provisioning is almost
absent in other vertebrates. A recent theory suggested that, in addition to thermoregulation …

Why is postnatal parental provisioning so rare in ectothermic vertebrates while prolonged
parental care is almost ubiquitous in endotherms? We argue that the scarcity of postnatal …

This paper investigates hypotheses regarding the historical evolution and adaptive
significance of parental care and the condition in birds and mammals. Except at the extreme …

Endothermy and its evolution are still an unresolved issue. Here, we present a model which
transforms an ectothermic amniote (ancestor) into a derived amniote (descendant) showing …

In a recent paper, Farmer (2000) offered a novel and stimulating hypothesis for the
convergent evolution of endothermy in birds and mammals. She proposed that a high level …

The effects of viviparity, lactation and other forms of postnatal parental feeding upon the
anatomy and energy budget of the parent and growth and development of the young are …

Birds and mammals share a number of features that are remarkably similar but that have
evolved independently. One of these characters, endothermy, has been suggested to have …

A central theme raised by Angilletta and Sears is that the energetic cost of endothermy is too
enormous to be offset by the benefits that thermogenesis could provide for reproduction …

Many elements of mammalian and avian thermoregulatory mechanisms are present in
reptiles, and the changes involved in the transition to endothermy are more quantitative than …

Summary 1 We examine variation associated with phylogeny in the scaling of body
temperature in endotherms, using data from 596 species of mammal and 490 species of …