The handicap hypothesis of sexual selection predicts that sexual ornaments have evolved
heightened condition–dependent expression. The prediction has only recently been subject …

The genic capture hypothesis offers a resolution to the question of how genetic variation in
male sexually selected traits is maintained in the face of strong female preferences. The …

Literature Cited to accompany Animal Communication, 2e Page 1 Principles of Animal
Communication, Second Edition Jack W. Bradbury and Sandra L. Vehrencamp Chapter 14 …

Walk near woods or water on any spring or summer night and you will hear a bewildering
(and sometimes deafening) chorus of frog, toad, and insect calls. How are these calls …

Gull chicks beg for food from their parents. Peacocks spread their tails to attract potential
mates. Meerkats alert family members of the approach of predators. But are these--and other …

Costs of sexual traits are of central importance to the theory of sexual selection. To qualify as
a cost in line with theoretical models, empirical studies must demonstrate that sexual traits …

Only high-quality males can bear the costs of an extreme sexual display,,,. As a
consequence, such males are not only more attractive, but they often live longer than …

In spite of their relatively small size as a group of insects, dung beetles have attracted an
inordinate amount of scientific interest over the years, starting with the work of the French …

The regulation of fat and glucose metabolism in the liver is controlled primarily by insulin
and glucagon. Changes in the circulating concentrations of these hormones signal fed or …

Animals often need to signal to attract mates and behavioural signalling may impose
substantial energetic and fitness costs to signallers. Consequently, individuals often …