Carry‐over effects occur when processes in one season influence the success of an
individual in the following season. This phenomenon has the potential to explain a large …

Summary 1 The use of stable isotopic techniques to study animal diets and trophic levels
requires a priori estimates of discrimination factors (Δ13C and Δ15N, also called …

Stable isotope mixing models are increasingly used to quantify consumer diets, but may be
misused and misinterpreted. We address major challenges to their effective application …

In the past 20 years the use of stable isotope analysis has become increasingly common in
ecological studies. In fact, in some instances these techniques have yielded remarkable …

Physiological Adaptations for Breeding in Birds is the most current and comprehensive
account of research on avian reproduction. It develops two unique themes: the consideration …

The life histories of organisms can show pronounced variation in the way that the costs of
reproduction are financed. To facilitate discussions of this variation, two terms are increasing …

Abstract. Historically, studies of habitat selection have focused on quantifying how current
patterns of habitat occupancy influence condition and survival within a season. This …

Female birds incur costs associated with increased egg production, including reductions in
chick provisioning ability, in future fecundity, in survival, and in egg and chick viability. It …

Seasonality creates a template for many natural processes and evolutionary adaptations.
Organisms are often faced with an annual cycle consisting of a productive (favorable) and …

Intensification of agriculture since the 1950s has enhanced the availability, competitive
ability, crude protein content, digestibility and extended growing seasons of forage grasses …