We propose a practical concept that distinguishes the particular kind of weaponry that has
evolved to be used in combat between individuals of the same species and sex, which we …

Although intrasexual competition among males is known to be an important determinant of
male mating success in lizards, less is known about what role the mate choice component of …

How strong is phenotypic selection on quantitative traits in the wild? We reviewed the
literature from 1984 through 1997 for studies that estimated the strength of linear and …

Urbanization is an increasingly important dimension of global change, and urban areas
likely impose significant natural selection on the species that reside within them. Although …

Relationships between morphology, physiology, or biochemistry, on the one hand, and
behavior and ecology, on the other, have been widely documented, as this volume attests …

Correlational selection favors combinations of traits and is a key element of many models of
phenotypic and genetic evolution. Multiple regression techniques for measuring selection …

1. Two often cited hypotheses explaining sexual head size dimorphism in lizards are: sexual
selection acting on structures important in intrasexual competition, and reduction of …

It is commonly argued that sexual size dimorphism (SSD) in lizards has evolved in response
to two primary, nonexclusive processes:(1) sexual selection for large male size, which …

Understanding the mechanics of adaptive evolution requires not only knowing the
quantitative genetic bases of the traits of interest but also obtaining accurate measures of the …

Some islands in the Gulf of California support very high densities of spiders. Spider density
is negatively correlated with island size; many small islands support 50-200 spiders per m3 …