| Citation | Waples, R. S., and T. E. Reed. 2023. Null Models for the Opportunity for Selection. American Naturalist 201:779-793 (https://doi.org/10.1086/723889) |
| Title | Null Models for the Opportunity for Selection |
| Publication Year | 2023 |
| Volume | 201 |
| Pages | 779-793 |
| Keywords | overdispersion, demographic stochasticity, underdispersion, viability selection, fertility selection |
| Abstract | Crow¿s `Opportunity for Selection¿ (I=variance in relative fitness) is an important albeit controversial eco-evolutionary concept, particularly with respect to the most appropriate null model(s). Here we treat this topic in a comprehensive way by considering opportunities for both fertility selection (If) and viability selection (Im) for discrete generations, for both seasonal and lifetime reproductive success in age-structured species, and for experimental designs that include either a full or partial life cycle, and complete enumeration or random subsampling. For each scenario, a null model that includes random demographic stochasticity can be constructed that follows Crow¿s initial formulation that I=If+Im. The two components of I are qualitatively different. Whereas an adjusted If (DIf) can be computed that accounts for random demographic stochasticity in offspring number, evaluating Im requires consideration of the covariance between survival and phenotype. Including as potent |
| Official Citation | Waples, R. S., and T. E. Reed. 2023. Null Models for the Opportunity for Selection. American Naturalist 201:779-793 |
| Links | (https://doi.org/10.1086/723889) |