Behavioral ecologists generally agree that animals derive benefits from familiarity with
spaces that they inhabit or visit, yet site familiarity is rudimentary or lacking in most models of …

Site fidelity, the tendency to return to a previously occupied location, has been observed in
numerous species belonging to at least three phyla. In this paper I develop a general model …

According to the “public information” hypothesis, some animal species may monitor the
current reproductive success of conspecifics to assess local habitat quality and to choose …

If a trade–off exists between reproductive effort and immune function, life–history decisions
may have important implications for parasite resistance. Here, we report effects of …

Untangling the spatial and temporal processes that influence population dynamics of
migratory species is challenging, because changes in abundance are shaped by variation in …

I studied 787 female and 510 male Prothonotary Warblers (Protonotaria citrea) breeding in
southern Illinois, USA, from 1994 to 2000 to test two competing hypotheses that may explain …

The rate of adaptive evolution, the contribution of selection to genetic changes that increase
mean fitness, is determined by the additive genetic variance in individual relative fitness. To …

The observation that traits closely related to fitness (“fitness traits”) have lower heritabilities
than traits more distantly associated with fitness has traditionally been framed in terms of …

A trend towards increasing average spring temperatures has been observed in Europe over
the past 25 years. This climatic variation has been attributed to a natural, large‐scale …

Based on more than 300 individually marked American Robins (Turdus migratorisu) and
Brown Thrashers (Toxostoma rufum), I tested three hypotheses to explain low return rates of …