The study of phenotypic evolution should be an integrative endeavor that combines different
approaches and crosses disciplinary and phylogenetic boundaries to consider complex …

A model for systematic changes in patterns of inter-individual variation in affective responses
to physical activity of varying intensities is presented, as a conceptual alternative to the …

Trade-offs and constraints are inherent to life, and studies of these phenomena play a
central role in both organismal and evolutionary biology. Trade-offs can be defined …

Adaptive radiation is the evolution of diversity within a rapidly multiplying lineage. It can
cause a single ancestral species to differentiate into an impressively vast array of species …

Interspecific comparison is a common approach in physiological ecology, comparative
physiology, and biochemistry, and in such related fields as functional morphology and …

The voices of birds have always been a source of fascination. Nature's Music brings together
some of the world's experts on birdsong, to review the advances that have taken place in our …

Behavioral evolution can be influenced by constraints, for example, of phylogeny and
performance. In this paper I describe a pattern in the evolution of birdsongs that may reflect a …

Organismal performance abilities occupy a central position in phenotypic evolution; they are
determined by suites of interacting lower‐level traits (eg, morphology and physiology) and …

▪ Abstract Understanding adaptation in morphological and physiological traits requires
elucidation of how traits relate to whole-organism performance and how performance relates …

Female songbirds are thought to assess males based on aspects of song, such as repertoire
size or amount of singing, that could potentially provide information about male quality. A …