The evolutionary stability of partial migration under different forms of competition

Ohms, Haley A.; Mohapatra, Anushaya; Lytle, David A.; Leenheer, Patrick De

doi:10.1007/s12080-018-0400-5

Cited by 7 publications

(10 citation statements)

References 80 publications

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“…The goals of this study were twofold: investigating if the evolution of partial migration is affected when only the migrants experience Allee effects and using the evolutionary game theory approach to determine evolutionary stable strategies if any. In existing literature [14,21,24,29], it is shown that negative density dependence in the fertilities alone can explain the partial migration phenomenon, provided it is attenuated with increasing sub-type abundances. The works are mostly numerical.…”

Section: Discussionmentioning

confidence: 99%

“…There has been lot of interest in understanding such a complex system in which population consists of a mix of migratory and non-migratory individuals. Several mechanisms are studied in association with partial migration which include genetic control, density-dependence, and exogenous stochastic effects in environmental variables [6,17,23,29,30]. In general, partial migration population models with negative density dependence effects are studied and neglecting the populations that experience Allee effects [17,21,26,29].…”

Section: Introductionmentioning

confidence: 99%

“…Several mechanisms are studied in association with partial migration which include genetic control, density-dependence, and exogenous stochastic effects in environmental variables [6,17,23,29,30]. In general, partial migration population models with negative density dependence effects are studied and neglecting the populations that experience Allee effects [17,21,26,29]. One of the most common examples of Allee effects occur when a species is subject to predation with a saturating functional response, meaning that increased population levels decrease the risk of predation.…”

Section: Introductionmentioning

confidence: 99%

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The evolutionary stability of partial migration with Allee effects

Trivedi¹,

Singh²,

Mohapatra³

2022

Preprint

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An Allee effect occurs when the per-capita growth rate increases at low densities. Here, we investigate the evolutionary stability of a partial migration population with migrant population experiencing Allee effects. Partial migration is a unique form of phenotypic diversity wherein migrant and non-migrant individuals coexist together. It is shown that when Allee effect is incorporated, the population undergoes a bifurcation as the fraction of migrating population increases from zero to unity. Using an evolutionary game theoretic approach, we prove the existence of a unique evolutionary stable strategy (ESS). It is also shown that the ESS is the only ideal free distribution (IFD) that arises in the context of partially migrating population.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The evolutionary stability of partial migration with Allee effects

Trivedi¹,

Singh²,

Mohapatra³

2022

Preprint

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“…We assume a normal distribution of observed behaviors, but multi‐modal distributions could occur if different strategies evolved in parallel with similar outcomes (Ohms et al. ). A uniform distribution of behaviors is less likely due to natural selection processes.…”

Section: Introductionmentioning

confidence: 99%

“…We define behavioral marginality as the degree to which a choice made by an individual is located at the margins of the distribution of all choices realized by a particular population. We assume a normal distribution of observed behaviors, but multi-modal distributions could occur if different strategies evolved in parallel with similar outcomes (Ohms et al 2018). A uniform distribution of behaviors is less likely due to natural selection processes.…”

Section: Introductionmentioning

confidence: 99%

Effect of behavioral marginality on survival of an alpine ungulate

2019

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Inter‐individual variability in behavior has been studied extensively for a wide range of species. However, few researchers have considered marginality, defined as the degree to which a choice made by an individual is located at the margins of the distribution of all possible choices available to a particular population. We explored the influence of marginal behaviors on the probability of survival of woodland caribou (Rangifer tarandus caribou). We used GPS collars to record the movement and fate of 43 caribou and distributed their habitat use behavior along two axes of a multidimensional scaling. We used Cox proportional‐hazards models to evaluate whether marginality had an effect on mortality risk. We found that individuals that exhibited marginal behavior had higher mortality risk than more conformist individuals. Caribou is a social species; thus, sharing a common habitat use strategy is likely an adaptation for minimizing the risk of predation. Our findings provide an empirical link between behavior and survival, contributing to our understanding of the decline of Rangifer across much of its Canadian distribution.

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The ideal free distribution and the evolution of partial migration

Mohapatra

Leenheer

2021

Journal of Difference Equations and Applications

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The evolutionary stability of partial migration under different forms of competition

Cited by 7 publications

References 80 publications

The evolutionary stability of partial migration with Allee effects

The evolutionary stability of partial migration with Allee effects

Effect of behavioral marginality on survival of an alpine ungulate

The ideal free distribution and the evolution of partial migration

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