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Related Experiment Videos

Negative maternal or paternal effects on tactic inheritance under a conditional strategy.

Daniel D Wiegmann1, Lisa M Angeloni, Jeffrey R Baylis

  • 1Department of Biological Sciences and J. P. Scott Center for Neuroscience, Mind and Behavior, Bowling Green State University, Bowling Green, Ohio 43403, USA. ddwiegm@bgnet.bgsu.edu

Evolution; International Journal of Organic Evolution
|September 3, 2004
PubMed
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The conditional strategy model explains how animals maintain diverse behaviors, even with parental effects influencing offspring traits. This model remains stable, predicting tactic alternation across generations in species like smallmouth bass.

Area of Science:

  • Evolutionary biology
  • Behavioral ecology
  • Population genetics

Background:

  • Alternative behavioral and life-history tactics are prevalent in animal populations.
  • The conditional strategy model explains the persistence of these tactics, even with inheritance and unequal fitness.
  • Maternal or paternal effects can complicate condition inheritance, potentially leading to tactic alternation across generations.

Purpose of the Study:

  • To investigate the robustness of the conditional strategy model to negative maternal or paternal effects on progeny condition.
  • To determine if the model's core properties (unique, stable tactic proportions) hold under complex inheritance patterns.
  • To apply the model to empirical data and understand tactic dynamics in real populations.

Main Methods:

Related Experiment Videos

  • Theoretical modeling of the conditional strategy under varying inheritance scenarios.
  • Analysis of tactic dynamics, including equilibrium proportions and response to perturbations.
  • Application of the model to field data from a smallmouth bass population.

    • Main Results:

    • The conditional strategy model is robust to negative maternal/paternal effects, maintaining stable tactic proportions.
    • Tactic inheritance influences the dynamics of proportion changes after perturbations.
    • In smallmouth bass, negative paternal effects cause alternating age at first reproduction in males, with rapid return to equilibrium.

    Conclusions:

    • The conditional strategy model accurately predicts and explains tactic dynamics, even with complex parental effects.
    • The model provides insights into phenomena like alternating reproductive strategies observed in natural populations.
    • The model's applicability extends to situations with difficult-to-measure ecological parameters.