Much research has been devoted to identify the conditions under which selection favours
flexible individuals or genotypes that are able to modify their growth, development and …

ABSTRACT A behavioral syndrome is a suite of correlated behaviors expressed either
within a given behavioral context (eg, correlations between foraging behaviors in different …

A recently developed integrative framework proposes that the vulnerability of a species to
environmental change depends on the species' exposure and sensitivity to environmental …

During the last quarter of a century, the evolution of the thermal sensitivity of performance in
ectotherms has become a major focus of research programs in evolutionary physiology …

SYNOPSIS. Maternal effects comprise a class of phenotypic effects that parents have on
phenotypes of their offspring that are unrelated to the offspring's own genotype. Although …

1. There is little unequivocal evidence to date in support of a positive relationship between
egg size and offspring fitness in birds. Although 40 studies (of 34 species) have considered …

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 …

The sex steroid hormones that affect development in birds have been thought to be
produced exclusively by the embryo or neonate. I used radioimmunoassay to measure the …

SYNOPSIS. Propagule size is perhaps the most widely recognized and studied maternal
effect in ecology, yet its evolution is not well-understood. The large body of extant optimality …

We approach conceptual issues in evolutionary biology from an endocrinological
perspective, noting that single hormones typically act on several target tissues and thereby …