-
Time to extinction of a cultural trait in an overlapping generation model Theor. Popul. Biol. (IF 1.454) Pub Date : 2021-01-19 Yutaka Kobayashi; Shun Kurokawa; Takuya Ishii; Joe Yuichiro Wakano
How long a newly emerging trait will stay in a population is a fundamental but rarely asked question in cultural evolution. To tackle this question, the distribution and mean of the time to extinction of a discrete cultural trait are derived for models with overlapping generations, in which trait transmission occurs from multiple role models to a single newborn and may fail with a certain probability
-
What the reproductive number R0 can and cannot tell us about COVID-19 dynamics Theor. Popul. Biol. (IF 1.454) Pub Date : 2021-01-05 Clara L. Shaw; David A. Kennedy
The reproductive number R (or R0, the initial reproductive number in an immune-naïve population) has long been successfully used to predict the likelihood of pathogen invasion, to gauge the potential severity of an epidemic, and to set policy around interventions. However, often ignored complexities have generated confusion around use of the metric. This is particularly apparent with the emergent pandemic
-
Coevolution fails to maintain genetic variation in a host-parasite model with constant finite population size Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-12-16 Ailene MacPherson; Matthew J. Keeling; Sarah P. Otto
Coevolutionary negative frequency-dependent selection has been hypothesized to maintain genetic variation in host and parasites. Despite the extensive literature pertaining to host-parasite coevolution, the temporal dynamics of genetic variation have not been examined in a matching-alleles model (MAM) with a finite population size relative to the expectation under neutral genetic drift alone. The dynamics
-
Computing the probability of gene trees concordant with the species tree in the multispecies coalescent Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-12-14 Jakub Truszkowski; Celine Scornavacca; Fabio Pardi
The multispecies coalescent process models the genealogical relationships of genes sampled from several species, enabling useful predictions about phenomena such as the discordance between a gene tree and the species phylogeny due to incomplete lineage sorting. Conversely, knowledge of large collections of gene trees can inform us about several aspects of the species phylogeny, such as its topology
-
Unstable population dynamics in obligate co-operators Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-10-06 Abdel H. Halloway; Margaret A. Malone; Joel S. Brown
Cooperation significantly impacts a species’ population dynamics as individuals choose others to associate with based upon fitness opportunities. Models of these dynamics typically assume that individuals can freely move between groups. Such an assumption works well for facultative co-operators (e.g. flocking birds, schooling fish, and swarming locusts) but less so for obligate co-operators (e.g. canids
-
Loss of genetic variation in the two-locus multiallelic haploid model Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-11-19 Martin Pontz; Marcus W. Feldman
In the evolutionary biology literature, it is generally assumed that for deterministic frequency-independent haploid selection models, no polymorphic equilibrium can be stable in the absence of variation-generating mechanisms such as mutation. However, mathematical analyses that corroborate this claim are scarce and almost always depend upon additional assumptions. Using ideas from game theory, we
-
A heuristic model of the effects of phenotypic robustness in adaptive evolution Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-11-19 Emanuele Rigato; Giuseppe Fusco
A recent theoretical, deterministic model of the effects of phenotypic robustness on adaptive evolutionary dynamics showed that a certain level of phenotypic robustness (critical robustness) is a required condition for adaptation to occur and to be maintained during evolution in most real organismal systems. We built an individual-based heuristic model to verify the soundness of these theoretical results
-
Kleptoparasitic interactions modeling varying owner and intruder hunger awareness Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-11-25 Noble Chowdhury; Kirubel Kentiba; Yashwant Mirajkar; Mana Nasseri; Jan Rychtář; Dewey Taylor
We consider a game theoretical model of kleptoparasitic interaction between two individuals, the Owner and the Intruder. The Owner is in possession of a resource and must decide whether to defend the resource against the Intruder or flee. If the Owner defends, the Intruder must decide whether to fight with the Owner or flee. The outcome of the fight depends on the hunger of the individuals, the hungrier
-
Establishment process of a magic trait allele subject to both divergent selection and assortative mating. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-07-28 T Sakamoto,H Innan
Sexual selection and divergent selection are among the major driving forces of reproductive isolation, which could eventually result in speciation. A magic trait is defined such that a single trait is subject to both divergent selection and mate choice through phenotype-based assortative mating. We are here interested in the evolutionary behavior of alleles at a genetic locus responsible for a magic
-
The spatial Muller's ratchet: Surfing of deleterious mutations during range expansion. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-08-17 Félix Foutel-Rodier,Alison M Etheridge
During a range expansion, deleterious mutations can “surf” on the colonization front. The resultant decrease in fitness is known as expansion load. An Allee effect is known to reduce the loss of genetic diversity of expanding populations, by changing the nature of the expansion from “pulled” to “pushed”. We study the impact of an Allee effect on the formation of an expansion load with a new model,
-
A class of fast-slow models for adaptive resistance evolution. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-08-11 Pastor E Pérez-Estigarribia,Pierre-Alexandre Bliman,Christian E Schaerer
Resistance to insecticide is considered nowadays one of the major threats to insect control, as its occurrence reduces drastically the efficiency of chemical control campaigns, and may also perturb the application of other control methods, like biological and genetic control. In order to account for the emergence and spread of such phenomenon as an effect of exposition to larvicide and/or adulticide
-
The effects of diploid male production on honey bee colony evolution and survival. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-09-01 Matthew I Betti,Isaac Lee
The order Hymenoptera includes most of the eusocial species on the planet. Correlated is the fact that many of the social species within the order are haplodiploid and use complementary sex determination (CSD) to determine the sex of offspring. CSD is the mechanism by why single sex alleles within an organism result in male development (haploid) and mismatched sex alleles develop into females (diploids)
-
Evolution of transmission modifiers under frequency-dependent selection and transmission in constant or fluctuating environments. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-09-11 Hao Shen,Uri Liberman,Marcus W Feldman
Although the Reduction Principle for rates of mutation, migration, and recombination has been proved for large populations under constant selection, the fate of modifiers of these evolutionary forces under frequency-dependent or fluctuating selection is, in general, less well understood. Here we study modifiers of transmission, which include modifiers of mutation and oblique cultural transmission,
-
Population abundance in predator-prey systems with predator's dispersal between two patches. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-07-10 Rong Huang,Yuanshi Wang,Hong Wu
This paper considers predator–prey systems in which the predator moves between two patches. One patch is a source, where the predator and prey can persist, while the other is a sink where the predator cannot survive. Our aim is to show whether or not the dispersal is beneficial to the predator’s total abundance at equilibrium. Using dynamical systems theory, we demonstrate conditions under which a
-
Maximum likelihood estimators for scaled mutation rates in an equilibrium mutation-drift model. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-06-18 Claus Vogl,Lynette C Mikula,Conrad J Burden
The stationary sampling distribution of a neutral decoupled Moran or Wright–Fisher diffusion with neutral mutations is known to first order for a general rate matrix with small but otherwise unconstrained mutation rates. Using this distribution as a starting point we derive results for maximum likelihood estimates of scaled mutation rates from site frequency data under three model assumptions: a twelve-parameter
-
Measuring the external branches of a Kingman tree: A discrete approach. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-05-30 Filippo Disanto,Thomas Wiehe
The Kingman coalescent process is a classical model of gene genealogies in population genetics. It generates Yule-distributed, binary ranked tree topologies – also called histories – with a finite number of n leaves, together with n−1 exponentially distributed time lengths: one for each layer of the history. Using a discrete approach, we study the lengths of the external branches of Yule distributed
-
Randomized matrix games in a finite population: Effect of stochastic fluctuations in the payoffs on the evolution of cooperation. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-05-22 Cong Li,Sabin Lessard
A diffusion approximation for a randomized 2 × 2-matrix game in a large finite population is ascertained in the case of random payoffs whose expected values, variances and covariances are of order given by the inverse of the population size N. Applying the approximation to a Randomized Prisoner’s Dilemma (RPD) with independent payoffs for cooperation and defection in random pairwise interactions, conditions
-
A characterisation of the reconstructed birth-death process through time rescaling. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-05-18 Anastasia Ignatieva,Jotun Hein,Paul A Jenkins
The dynamics of a population exhibiting exponential growth can be modelled as a birth-death process, which naturally captures the stochastic variation in population size over time. In this article, we consider a supercritical birth-death process, started at a random time in the past, and conditioned to have n sampled individuals at the present. The genealogy of individuals sampled at the present time
-
On closed-form expressions to Gompertz-Makeham life expectancy. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-05-11 Fredy Castellares,Silvio C Patrício,Artur J Lemonte,Bernardo L Queiroz
Missov and Lenart (2013) derived closed-form solutions to the life expectancy and remaining life expectancy at age x when the mortality is governed by a Gompertz-Makeham hazard, which is a parametric model commonly applied to human mortality data at adult and old ages. However, the closed-form expressions provided by these authors are not correct. We provide, therefore, valid and correct expressions
-
Invasion implies substitution in ecological communities with class-structured populations. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-05-06 Tadeas Priklopil,Laurent Lehmann
Long-term evolution of quantitative traits is classically and usefully described as the directional change in phenotype due to the recurrent fixation of new mutations. A formal justification for such continual evolution ultimately relies on the "invasion implies substitution"-principle. Here, whenever a mutant allele causing a small phenotypic change can successfully invade a population, the ancestral
-
Using YY supermales to destabilize invasive fish populations. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-04-23 Joydeb Bhattacharyya,Daniel L Roelke,Jay R Walton,Soumitro Banerjee
A plausible biocontrol strategy for the eradication of invasive species involves augmenting wild populations with genetically modified supermales. Supermales contain double YY chromosomes. When they are augmented into a wild population, destabilization and eventual extinction occurs over time due to a strongly skewed gender ratio towards males. Here, we employ a mathematical model that considers an
-
A temporal model of territorial defence with antagonistic interactions. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-04-23 Tamás Varga,József Garay,Jan Rychtář,Mark Broom
Territorial behaviour is an important part of the lives of many animals. Once a territory has been acquired, an animal may spend its entire life on it, and may have to repeatedly defend it from conspecifics. Some species make great investments in the defence of a territory, and this defence can be costly, in terms of time, energy and risk of injury. Time costs in particular have rarely been explicitly
-
Some simple rules for estimating reproduction numbers in the presence of reservoir exposure or imported cases. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-04-15 Angus McLure,Kathryn Glass
For many diseases, the basic reproduction number (R0) is a threshold parameter for disease extinction or survival in isolated populations. However no human population is fully isolated from other human or animal populations. We use compartmental models to derive simple rules for the basic reproduction number in populations where an endemic disease is sustained by a combination of local transmission
-
Testing for population decline using maximal linkage disequilibrium blocks. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-04-09 Elise Kerdoncuff,Amaury Lambert,Guillaume Achaz
Only 6% of known species have a conservation status. Methods that assess conservation statuses are often based on individual counts and are thus too laborious to be generalized to all species. Population genomics methods that infer past variations in population size are easy to use but limited to the relatively distant past. Here we propose a population genomics approach that tests for recent population
-
Fluctuations in lifetime selection in an autocorrelated environment. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-04-08 Olivier Cotto,Luis-Miguel Chevin
Most natural environments vary stochastically and are temporally autocorrelated. Previous theory investigating the effects of environmental autocorrelation on evolution mostly assumed that total fitness resulted from a single selection episode. Yet organisms are likely to experience selection repeatedly along their life, in response to possibly different environmental states. We model the evolution
-
Assortative mating by population of origin in a mechanistic model of admixture. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-04-07 Amy Goldberg,Ananya Rastogi,Noah A Rosenberg
Populations whose mating pairs have levels of similarity in phenotypes or genotypes that differ systematically from the level expected under random mating are described as experiencing assortative mating. Excess similarity in mating pairs is termed positive assortative mating, and excess dissimilarity is negative assortative mating. In humans, empirical studies suggest that mating pairs from various
-
Fifty years of Theoretical Population Biology. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-04-07 Noah A Rosenberg
The year 2020 marks the 50th anniversary of Theoretical Population Biology. This special issue examines the past and continuing contributions of the journal. We identify some of the most important developments that have taken place in the pages of TPB, connecting them to current research and to the numerous forms of significance achieved by theory in population biology.
-
The nonlinear structure of linkage disequilibrium. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-03-25 Reginald D Smith
-
Modeling the dispersal-reproduction trade-off in an expanding population. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-03-21 Nathan G Marculis,Maya L Evenden,Mark A Lewis
Trade-offs between dispersal and reproduction are known to be important drivers of population dynamics, but their direct influence on the spreading speed of a population is not well understood. Using integrodifference equations, we develop a model that incorporates a dispersal–reproduction trade-off which allows for a variety of different shaped trade-off curves. We show there is a unique reproductive-dispersal
-
Building a synthetic basis for kin selection and evolutionary game theory using population genetics. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-03-09 Jeremy Van Cleve
-
The Wright-Fisher model with efficiency. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-03-06 Adrián González Casanova,Verónica Miró Pina,Juan Carlos Pardo
In this article, we propose a Wright-Fisher model with two types of individuals: the inefficient individuals, those who need more resources to reproduce and can have a higher growth rate, and the efficient individuals. In this model, the total amount of resource N is fixed, and the population size varies randomly depending on the number of efficient individuals. We show that, as N increases, the frequency
-
Developments in coalescent theory from single loci to chromosomes. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-03-04 John Wakeley
-
On cherry and pitchfork distributions of random rooted and unrooted phylogenetic trees. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-03-03 Kwok Pui Choi,Ariadne Thompson,Taoyang Wu
Tree shape statistics are important for investigating evolutionary mechanisms mediating phylogenetic trees. As a step towards bridging shape statistics between rooted and unrooted trees, we present a comparison study on two subtree statistics known as numbers of cherries and pitchforks for the proportional to distinguishable arrangements (PDA) and the Yule-Harding-Kingman (YHK) models. Based on recursive
-
Allele frequency spectra in structured populations: Novel-allele probabilities under the labelled coalescent. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-03-03 Marcy K Uyenoyama,Naoki Takebayashi,Seiji Kumagai
We address the effect of population structure on key properties of the Ewens sampling formula. We use our previously-introduced inductive method for determining exact allele frequency spectrum (AFS) probabilities under the infinite-allele model of mutation and population structure for samples of arbitrary size. Fundamental to the sampling distribution is the novel-allele probability, the probability
-
Influence of demographically-realistic mortality schedules on vaccination strategies in age-structured models. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-02-03 Zhilan Feng,Yejuan Feng,John W Glasser
Because demographic realism complicates analysis, mathematical modelers either ignore demography or make simplifying assumptions (e.g., births and deaths equal). But human populations differ demographically, perhaps most notably in their mortality schedules. We developed an age-stratified population model with births, deaths, aging and mixing between age groups. The model includes types I and II mortality
-
On the approximation of interaction effect models by Hadamard powers of the additive genomic relationship. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-01-25 Johannes W R Martini,Fernando H Toledo,José Crossa
Whole genome epistasis models with interactions between different loci can be approximated by genomic relationship models based on Hadamard powers of the additive genomic relationship. We illustrate that the quality of this approximation reduces when the degree of interaction d increases. Moreover, considering relationship models defined as weighted sum of interactions of different degree, we investigate
-
L. Luca Cavalli-Sforza: A Renaissance Scientist. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-01-18 Marcus W Feldman
-
Drivers of diversity in individual life courses: Sensitivity of the population entropy of a Markov chain. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-01-17 Ulrich K Steiner,Shripad Tuljapurkar
Individuals differ in their life courses, but how this diversity is generated, how it has evolved and how it is maintained is less understood. However, this understanding is crucial to comprehend evolutionary and ecological population dynamics. In structured populations, individual life courses represent sequences of stages that end in death. These life course trajectories or sequences can be described
-
Statistical tools for seed bank detection. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-01-13 Jochen Blath,Eugenio Buzzoni,Jere Koskela,Maite Wilke Berenguer
We derive statistical tools to analyze the patterns of genetic variability produced by models related to seed banks; in particular the Kingman coalescent, its time-changed counterpart describing so-called weak seed banks, the strong seed bank coalescent, and the two-island structured coalescent. As (strong) seed banks stratify a population, we expect them to produce a signal comparable to population
-
Modeling and control of mosquito-borne diseases with Wolbachia and insecticides. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-01-09 Yazhi Li,Xianning Liu
Mosquitoes cause more human suffering than any other organism. It is estimated that over one million people worldwide die from mosquito-borne diseases every year. With the continuous efforts of many researchers, Wolbachia gets more and more attention due to its characteristics of maternal transmission in mosquito population and it may cause cytoplasmic incompatibility (CI) which makes healthy females
-
Pease (1987): The evolutionary epidemiology of influenza A. Theor. Popul. Biol. (IF 1.454) Pub Date : 2020-01-09 Viggo Andreasen,Julia R Gog
-
Dispersal asymmetry in a two-patch system with source-sink populations. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-11-25 Hong Wu,Yuanshi Wang,Yufeng Li,Donald L DeAngelis
This paper analyzes source-sink systems with asymmetric dispersal between two patches. Complete analysis on the models demonstrates a mechanism by which the dispersal asymmetry can lead to either an increased total size of the species population in two patches, a decreased total size with persistence in the patches, or even extinction in both patches. For a large growth rate of the species in the source
-
Local fluctuations of genetic processes defined on two time scales, with applications to effective size estimation. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-11-25 Ola Hössjer,Peder A Tyvand
In this paper we develop a general framework for how the genetic composition of a structured population with strong migration between its subunits, evolves over time. The dynamics is described in terms of a vector-valued Markov process of allele, genotype or haplotype frequencies that varies on two time scales. The more rapid changes are random fluctuations in terms of a multivariate autoregressive
-
Genealogical distances under low levels of selection. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-11-21 Elisabeth Huss,Peter Pfaffelhuber
For a panmictic population of constant size evolving under neutrality, Kingman's coalescent describes the genealogy of a population sample in equilibrium. However, for genealogical trees under selection, not even expectations for most basic quantities like height and length of the resulting random tree are known. Here, we give an analytic expression for the distribution of the total tree length of
-
Quantifying the forces that maintain prophages in bacterial genomes. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-11-20 Amjad Khan,Lindi M Wahl
Genome sequencing has revealed that prophages, viral sequences integrated in a bacterial chromosome, are abundant, accounting for as much as 20% of the bacterial genome. These sequences can confer fitness benefits to the bacterial host, but may also instigate cell death through induction. Several recent investigations have revealed that the distribution of prophage lengths is bimodal, with a clear
-
Multi-model inference of non-random mating from an information theoretic approach. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-11-19 A Carvajal-Rodríguez
Non-random mating has a significant impact on the evolution of organisms. Here, I developed a modelling framework for discrete traits (with any number of phenotypes) to explore different models connecting the non-random mating causes (mate competition and/or mate choice) and their consequences (sexual selection and/or assortative mating). I derived the formulaefor the maximum likelihood estimates of
-
Incorporating tick feeding behaviour into R0 for tick-borne pathogens. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-11-12 Simon P Johnstone-Robertson,Maria A Diuk-Wasser,Stephen A Davis
Tick-borne pathogens pose a considerable disease burden in Europe and North America, where increasing numbers of human cases and the emergence of new tick-borne pathogens has renewed interest in resolving the mechanisms underpinning their geographical distribution and abundance. For Borrelia burgdorferi and tick-borne encephalitis (TBE) virus, transmission of infection from one generation of ticks
-
Competing barnacle species with a time dependent reproduction rate. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-11-12 M C Gallagher,M Arnold,E Kadaub,S Culloty,R M O'Riordan,R McAllen,D Rachinskii
A simple competition model with time varying periodic coefficients, in which two species use different reproduction strategies, is explored in this paper. The two species considered comprise a native species which reproduces once a year over a short time period and an invasive species which is capable of reproducing throughout the entire year. A monotonicity property of the model is instrumental for
-
Holt (1977) and apparent competition. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-11-08 Sebastian J Schreiber,Vlastimil Křivan
-
The popularity spectrum applied to a cross-cultural question. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-10-28 Mitsuhiro Nakamura,Joe Yuichiro Wakano,Kenichi Aoki,Yutaka Kobayashi
We investigate a new approach for identifying the contribution of horizontal transmission between groups to cross-cultural similarity. This method can be applied to datasets that record the presence or absence of artefacts, or attributes thereof, in archaeological and ethnographic assemblages, from which popularity spectra can be constructed. Based on analytical and simulation models, we show that
-
Is there a Trivers-Willard effect for parental investment? Modelling evolutionarily stable strategies using a matrix population model with nonlinear mating. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-10-11 Matthias Borgstede
The Trivers-Willard hypothesis (TWH) states that parents in good condition preferentially produce the sex with a higher variation in reproductive success, whereas parents in bad condition favour the opposite sex. Theorists distinguish two variants of the TWH: (a) a biased sex-ratio at birth and (b) biased parental investment after birth. It has been argued before that the conditions stated by Trivers
-
Adaptive walks on high-dimensional fitness landscapes and seascapes with distance-dependent statistics. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-10-09 Atish Agarwala,Daniel S Fisher
The dynamics of evolution is intimately shaped by epistasis - interactions between genetic elements which cause the fitness-effect of combinations of mutations to be non-additive. Analyzing evolutionary dynamics that involves large numbers of epistatic mutations is intrinsically difficult. A crucial feature is that the fitness landscape in the vicinity of the current genome depends on the evolutionary
-
Germination variation facilitates the evolution of seed dormancy when coupled with seedling competition. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-10-09 Nicholas Kortessis,Peter Chesson
Fluctuating environmental conditions have consequences for the evolution of life histories because they cause fitness variance. This variance can favor risk-spreading strategies, often known as bet-hedging strategies, in which growth or reproduction is spread over time or space, with some costs, but greater certainty of success. An important example is seed dormancy in annual plants, in which some
-
The importance of Durrett and Levin (1994): "The importance of being discrete (and spatial)". Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-10-09 Stephen W Pacala
-
The evolution of coexistence theory. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-10-08 Priyanga Amarasekare
-
"Any news?" Special issue in honor of Marcus Feldman's 75th birthday. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-10-06 Sohini Ramachandran,Sarah P Otto,Marcy Uyenoyama,Jeremy Van Cleve
-
Coalescence in the diffusion limit of a Bienaymé-Galton-Watson branching process. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-10-01 Conrad J Burden,Albert C Soewongsono
We consider the problem of estimating the elapsed time since the most recent common ancestor of a finite random sample drawn from a population which has evolved through a Bienaymé-Galton-Watson branching process. More specifically, we are interested in the diffusion limit appropriate to a supercritical process in the near-critical limit evolving over a large number of time steps. Our approach differs
-
Enhancing population stability with combined adaptive limiter control and finding the optimal harvesting-restocking balance. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-09-30 Juan Segura,Frank M Hilker,Daniel Franco
Fluctuations in population size may have negative consequences (e.g., an increased risk of extinction or the occurrence of repeated outbreaks), and many management strategies are aimed at avoiding them by either only restocking or only harvesting the population. Two of these strategies are adaptive limiter control (ALC) and adaptive threshold harvesting (ATH). With ALC the population is controlled
-
Tuljapurkar and Orzack (1980) and Tuljapurkar (1982a,b): Population dynamics in variable environments. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-09-28 Ulrich K Steiner
-
A multi-epoch model for the number of species within genera. Theor. Popul. Biol. (IF 1.454) Pub Date : 2019-09-27 Olivier François
An early question in evolutionary theory asked why frequency distributions of taxonomic group sizes exhibit "hollow curves" so frequently. An answer to this question was provided by G. Udny Yule's seminal contribution introducing a discrete model for those distributions. But Yule observed that the fit of his model to observed distributions was sometimes imperfect, in particular for the class of reptiles
Contents have been reproduced by permission of the publishers.