Synthesizing studies of parental care in a wide variety of
animals, this book is the first attempt to provide general answers
to the following important questions: Why does the extent of
parental care vary so widely between species? Why do only females
care for eggs and young in some animals, only males in others, and
both parents in a few? To what extent is parental care adjusted to
variation in its benefits to offspring and its costs to parents?
How do parents divide their resources between their sons and
daughters? In this book separate chapters examine the evolution of
variation in egg and neonate size, of viviparity and other forms of
bearing, and of differences in the duration of incubation,
gestation, and lactation. The book reviews theoretical and
empirical predictions concerning the evolution of parental care and
examines the extent to which these are supported by empirical
evidence. The author examines the distribution of parental care
among offspring, reviews the empirical evidence that parents invest
to different extents in their sons and daughters, and discusses the
degree to which parents manipulate the sex ratio of their progeny
in relation to the availability of resources.
General
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