IN CONTEXT

KEY FIGURE

David Lack (1910–73)

BEFORE

1930 British geneticist Ronald Fisher combines Gregor Mendel’s work on genetics with Charles Darwin’s theory of natural selection, and argues that the effort spent on reproduction must be worth the cost.

AFTER

1948 David Lack extends his theory of optimal clutch size in birds to include litter size in mammals.

1954 Lack develops his food limitation hypothesis further in The Natural Regulation of Animal Numbers, to encompass birds, mammals, and some insect species.

1982 Tore Slagsvold proposes the nest predation hypothesis, which states that clutch size is related to the likelihood of the nest ...

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