▪ Abstract It has recently been argued that the paradox of hel** behavior in birds has been
solved. This optimism may be premature. I argue that there is no obvious dichotomy …

Elasticity is a perturbation measure in matrix projection models that quantifies the
proportional change in population growth rate as a function of a proportional change in a …

A central goal in ecology is to predict population dynamics from demographic information.
Based on the asymptotic population growth rate λ, calculated from a projection matrix model …

Matrix population models require the population to be divided into discrete stage classes. In
many cases, especially when classes are defined by a continuous variable, such as length …

Population ecology has matured to a sophisticated science with astonishing potential for
contributing solutions to wildlife conservation and management challenges. And yet, much …

Variability in population growth rate is thought to have negative consequences for organism
fitness. Theory for matrix population models predicts that variance in population growth rate …

Demographic perturbation analysis explores how population statistics (especially population
growth rate λ) respond to changes in the vital rates (survival, growth, development …

Most turtle species suffer highly mortality in their first year, have a long juvenile period, and
can live for decades once they reach adulthood. Conservationists have implemented a …

Ecologists and environmental managers rely on mathematical models, both to understand
ecological systems and to predict future system behavior. In turn, models rely on appropriate …

We developed a simulation method, known as life‐stage simulation analysis (LSA) to
measure potential effects of uncertainty and variation in vital rates on population growth (λ) …