▪ Abstract Studies of dispersal polymorphism in insects have played a pivotal role in
advancing our understanding of population dynamics, life history evolution, and the …

Summary 1 I synthesize the understanding of the relationship between landscape structure
and animal movement in human‐modified landscapes. 2 The variety of landscape structures …

Migration, broadly defined as directional movement to take advantage of spatially distributed
resources, is a dramatic behaviour and an important component of many life histories that …

We outline a general scheme for migration that applies across taxa, incorporates the several
varieties of migration, and includes all levels of biological organization, from genes to …

The impetus for this book arose out of my previous book, The Evolution of Life Histories
(Roff, 1992). In that book I presented a single chapter on quanti tative genetic theory …

▪ Abstract In evolutionary ecology, risk-spreading (ie bet-hedging) is the idea that
unpredictably variable environments favor genotypes with lower variance in fitness at the …

Many insects are capable of developing into either long-winged or short-winged (or
wingless) morphs, which enables them to rapidly match heterogeneous environments. Thus …

Many organisms live in ephemeral habitats, making dispersal a vital element of life history.
Here, we investigate how dispersal rate evolves in response to habitat persistence, mean …

Background The re-evolution of complex characters is generally considered impossible, yet,
studies of recent years have provided several examples of phenotypic reversals shown to …

Reduction and total loss of characters are common evolutionary phenomena.
Vestigialization of any morphological, physiological, or behavioral feature can be expected …