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A Performance Based Approach To Distinguish Indices From Handicaps In Sexual Selection Studies, B Vanhooydonck, R Van Damme, A Herrel, Dj Irschick
A Performance Based Approach To Distinguish Indices From Handicaps In Sexual Selection Studies, B Vanhooydonck, R Van Damme, A Herrel, Dj Irschick
Biology Department Faculty Publication Series
- Central to theories of the evolution of conspicuous secondary sexual traits is that sexual traits honestly reflect at least one aspect of an individual's quality. In general, the reliability of sexual traits can be explained in two ways. Either sexual traits are reliable indicators of individual quality because they are costly and the costs in terms of survival are higher for an individual of low quality as compared to an individual of high quality (i.e. handicap principle) or sexual traits are reliable because of physical constraints and thus cost-free (reliability by design).
- The distinction between indices and handicaps thus centres …
A Functional Approach To Sexual Selection, Duncan J. Irschick, Anthony Herrel, Bieke Vanhooydonck, Raoul Van Damme
A Functional Approach To Sexual Selection, Duncan J. Irschick, Anthony Herrel, Bieke Vanhooydonck, Raoul Van Damme
Biology Department Faculty Publication Series
- Sexual selection theory is a robust and dynamic field within evolutionary biology, yet despite decades of research, remarkably little is known of the mechanistic bases of mate choice and male competition.
- Because many aspects of sexual selection involve dynamic movements, and are physically challenging, the limits of sexual selection may be defined by key functional and physiological variables (i.e. the ‘functional approach’).
- We advocate the functional approach for providing mechanistic resolution on the adaptive basis of sexual structures and signals, the nature of mate choice and how males compete, among other issues.
- An overview of recent work, highlighted in this …
Effects Of Temperature And Sex On Jump Performance And Biomechanics In The Lizard Anolis Carolinensis, Sp Lailvaux, Dj Irschick
Effects Of Temperature And Sex On Jump Performance And Biomechanics In The Lizard Anolis Carolinensis, Sp Lailvaux, Dj Irschick
Biology Department Faculty Publication Series
- Temperature is known to affect whole-organism performance capacities significantly in ectotherms, but may potentially alter performance kinematics as well. Locomotor performance is a multivariate phenomenon, hence changes in temperature are probably reflected in multiple aspects of locomotion.
- We studied the thermal sensitivity of several kinetic and kinematic jump variables, including acceleration and power output, in male and female green anole lizards, Anolis carolinensis Voigt 1832. We hypothesized that temperature would have similar effects on kinetic and kinematic variables.
- We also tested the hypotheses that males and females would differ in jump performance, but only because of sexual dimorphism for body …