Age‐Specific Fitness Components and Their Temporal Variation in the Barn Owl
@article{Altwegg2006AgeSpecificFC, title={Age‐Specific Fitness Components and Their Temporal Variation in the Barn Owl}, author={Res Altwegg and Michael Schaub and Alexandre Roulin}, journal={The American Naturalist}, year={2006}, volume={169}, pages={47 - 61} }
Theory predicts that temporal variability plays an important role in the evolution of life histories, but empirical studies evaluating this prediction are rare. In constant environments, fitness can be measured by the population growth rate λ, and the sensitivity of λ to changes in fitness components estimates selection on these traits. In variable environments, fitness is measured by the stochastic growth rate λs, and stochastic sensitivities estimate selection pressure. Here we examine age…
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References
SHOWING 1-10 OF 82 REFERENCES
Correctly Estimating How Environmental Stochasticity Influences Fitness and Population Growth
- BiologyThe American Naturalist
- 2005
It is shown that the apparently simple relationship between vital rate variance and fitness can be considerably more complex than previously thought, and the previously estimated negative sensitivities of fitness or population growth to variance in a vital rate can be enhanced by positive correlations between rates or reversed by negative correlations.
TEMPORAL VARIATION IN SURVIVAL OF MAMMALS: A CASE OF ENVIRONMENTAL CANALIZATION?
- Environmental Science
- 2003
If canalization occurs, within a given population the variance of canalized fitness components should be less than that of noncanalized components, and among populations an inverse relationship should occur between the potential demographic impact of fitness components and their temporal variability.
Individual Covariation in Life‐History Traits: Seeing the Trees Despite the Forest
- BiologyThe American Naturalist
- 2002
The results provided confirmation of what has been suggested by other investigators: within‐cohort phenotypic selection can mask senescence, and the development of models permitting access to individual variation in fitness is a promising advance for the study ofsenescence and evolutionary processes.
Temporal Variation in Fitness Components and Population Dynamics of Large Herbivores
- Environmental Science
- 2000
In large-herbivore populations, environmental variation and density dependence co-occur and have similar effects on various fitness components and how that variability affects changes in population growth rates is examined.
OPTIMAL REPRODUCTIVE EFFORT IN STOCHASTIC, DENSITY‐DEPENDENT ENVIRONMENTS
- EconomicsEvolution; international journal of organic evolution
- 1999
Estimating the ESS reproductive effort for stage‐structured models in density‐dependent and stochastic conditions finds that variability causes significant changes in reproductive effort, and the amount that effort increases or decreases depends on many factors.
A Quantitative Genetic Theory of Life History Evolution
- Biology
- 1982
Dynamic models of quantitative (polygenic) characters are more generally applicable in the analysis of life history evolution than are static optimization methods or one and two locus genetic models.…
Patterns of variance in stage-structured populations: evolutionary predictions and ecological implications.
- Environmental ScienceProceedings of the National Academy of Sciences of the United States of America
- 1998
The results suggest that variable life history stages tend to contribute relatively little to population growth rates because natural selection may alter life histories to minimize stages with both high sensitivity and high variation.
Does environmental stochasticity matter? Analysis of red deer life-histories on Rum
- Environmental ScienceEvolutionary Ecology
- 2005
Red deer's fitness is not markedly affected by density-independent stochastic effects on the population, and they are adapted to the average conditions they experience, so r (the annual per capita rate of population growth) is an appropriate measure of fitness in a population with stoChastic numerical fluctuations.
Variation and covariation in survival, dispersal, and population size in barn owls Tyto alba
- Environmental Science
- 2003
The patterns of correlation between survival, dispersal, and population size suggest strong fluctuations in environmental conditions that influence the dynamics of barn owl populations at a larger spatial scale.
AVIAN LIFE HISTORY VARIATION AND CONTRIBUTION OF DEMOGRAPHIC TRAITS TO THE POPULATION GROWTH RATE
- Environmental Science
- 2000
Based on the asymptotic population growth rate l, calculated from a projection matrix model as a descriptor of the population dynamics, published data of 49 species of birds are analyzed to determine how l is influenced by variation in different demographic traits.