GEIs when Information Transfer is Uncertain or Incomplete

Getty, Thomas

doi:10.1002/9781118912591.ch2

Cited by 5 publications

(5 citation statements)

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“…At present it is not clear whether irregular occurrences of the Fisher process—and the resulting spikes in COV A in between migration events, or prior to and during episodes of runaway selection—would be sufficient to sustain exaggerated traits and preferences over the long term. The role of migration is now often considered in models of the sexual selection process (e.g., Getty ; Holman and Kokko ; Woolf et al ). Additionally, we note that several earlier models incorporating migration and environmental heterogeneity reported that these features would favor the evolution of mate choice by conserving the trait, and preference, V A that are necessary for sexual selection to function (Day ; Proulx ).…”

Section: Discussionmentioning

confidence: 99%

The dilemma of Fisherian sexual selection: Mate choice for indirect benefits despite rarity and overall weakness of trait-preference genetic correlation

et al. 2014

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Fisher's mechanism of sexual selection is a fundamental element of evolutionary theory. In it nonrandom mate choice causes a genetic covariance between a male trait and female preference for that trait and thereby generates a positive feedback process sustaining accelerated coevolution of the trait and preference. Numerous theoretical models of Fisher's mechanism have confirmed its mathematical underpinnings, yet biologists have often failed to find evidence for trait-preference genetic correlation in populations in which the mechanism was expected to function. We undertook a survey of the literature to conduct a formal meta-analysis probing the incidence and strength of trait-preference correlation among animal species. Our meta-analysis found significant positive genetic correlations in fewer than 20% of the species studied and an overall weighted correlation that is slightly positive. Importantly, a significant positive correlation was not found in any thorough study that included multiple subgroups. We discuss several ways in which the dynamic, multivariate nature of mate choice may reduce the trait-preference genetic correlation predicted by Fisher's mechanism. We then entertain the possibilities that Fisherian-like processes sometimes function without genetic correlation, and that mate choice may persist in a population as long as genetic correlation, and therefore Fisher's mechanism, occurs intermittently. Fisher's mechanism of sexual selection (Fisher 1915(Fisher , 1930(Fisher , 1958 has dominated biological thought on the genetics of mate choice over the past 40 years. The mechanism is central to most sexual selection models (Prum 2010) and has been formally modeled on numerous occasions beginning in the early 1980s (O'Donald

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Section: Discussionmentioning

confidence: 99%

The dilemma of Fisherian sexual selection: Mate choice for indirect benefits despite rarity and overall weakness of trait-preference genetic correlation

et al. 2014

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“…Signal systems are a key aspect of information theory, which focuses on quantification of information; by contrast, signalling theory is a sub‐discipline of evolutionary biology concerned with the adaptive value of a signal, and signal detection theory is a statistical application that deals with prediction based on posterior distributions (Getty, ). Despite the subtle differences among the foci of these bodies of theory, they share interest in elucidating how signal systems are influenced by internal and external factors, and assessing the consequences of errors in signal systems.…”

Section: Signal Systems and Signalling Theorymentioning

confidence: 99%

“…Information theory approaches to signalling focus on the information content of signals, measured as uncertainty reduction (Hartley, ; Shannon, , ; Adami, ; Schneider, ). Evolutionary biological approaches to signalling focus on the value of information, measured by how much it can improve fitness (Dall et al, ; Getty, ; Pike, McNamara & Houston, ). Getty () illustrates with the following simple example.…”

Section: Signal Systems and Signalling Theorymentioning

confidence: 99%

“…Evolutionary biological approaches to signalling focus on the value of information, measured by how much it can improve fitness (Dall et al, ; Getty, ; Pike, McNamara & Houston, ). Getty () illustrates with the following simple example. In a penny‐matching game, the uncertainty in the outcome of a flipped penny is one bit.…”

Section: Signal Systems and Signalling Theorymentioning

confidence: 99%

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Epigenetics and the maintenance of developmental plasticity: extending the signalling theory framework

et al. 2018

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Developmental plasticity, a phenomenon of importance in both evolutionary biology and human studies of the developmental origins of health and disease (DOHaD), enables organisms to respond to their environment based on previous experience without changes to the underlying nucleotide sequence. Although such phenotypic responses should theoretically improve an organism's fitness and performance in its future environment, this is not always the case. Herein, we first discuss epigenetics as an adaptive mechanism of developmental plasticity and use signaling theory to provide an evolutionary context for DOHaD phenomena within a generation. Next, we utilize signalling theory to identify determinants of adaptive developmental plasticity, detect sources of random variability - also known as process errors that affect maintenance of an epigenetic signal (DNA methylation) over time, and discuss implications of these errors for an organism's health and fitness. Finally, we apply life-course epidemiology conceptual models to inform study design and analytical strategies that are capable of parsing out the potential effects of process errors in the relationships among an organism's early environment, DNA methylation, and phenotype in a future environment. Ultimately, we hope to foster cross-talk and interdisciplinary collaboration between evolutionary biology and DOHaD epidemiology, which have historically remained separate despite a shared interest in developmental plasticity.

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“…If temporal changes are fast, i.e. the best mate for a given female varies through time (Ingleby et al., 2010), females might need updated information regarding better adapted (Getty, 2014; Wade, 2014) and/or more popular males (Kokko et al., 2007). Theoretical work that focuses on the ‘informedness’ of individuals has, indeed, considered age effects.…”

Section: Introductionmentioning

confidence: 99%

Social learning by mate‐choice copying increases dispersal and reduces local adaptation

Sapage

Varela

2020

Functional Ecology

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GEIs when Information Transfer is Uncertain or Incomplete

Cited by 5 publications

References 49 publications

The dilemma of Fisherian sexual selection: Mate choice for indirect benefits despite rarity and overall weakness of trait-preference genetic correlation

The dilemma of Fisherian sexual selection: Mate choice for indirect benefits despite rarity and overall weakness of trait-preference genetic correlation

Epigenetics and the maintenance of developmental plasticity: extending the signalling theory framework

Social learning by mate‐choice copying increases dispersal and reduces local adaptation

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