Lorenzo Mari,Marino Gatto,Renato Casagrandi
Lorenzo Mari
We investigate how central-place seed foragers with a nest in the proximity of one or more seed sources determine the formation of different vegetation patterns. In particular, we discuss the ecological conditions that lead to the formation...
Thomas Nagylaki
Thomas Nagylaki
Evolution under the multilocus Levene model is investigated. The linkage map is arbitrary, but epistasis is absent. The geometric-mean fitness, w(rho), depends only on the vector of gene frequencies, rho; it is nondecreasing, and the single...
Polymorphism in the two-locus Levene model with nonepistatic directional selection [0.03%]
两基因位点Levene模型中非表型隐性定向选择的多态性
Reinhard Bürger
Reinhard Bürger
For the Levene model with soft selection in two demes, the maintenance of polymorphism at two diallelic loci is studied. Selection is nonepistatic and dominance is intermediate. Thus, there is directional selection in every deme and at ever...
Dieter Vanderelst,René M C Ahn,Emilia I Barakova
Dieter Vanderelst
Animals use heuristic strategies to determine from which conspecifics to learn socially. This leads to directed social learning. Directed social learning protects them from copying non-adaptive information. So far, the strategies of animals...
Population and prehistory III: food-dependent demography in variable environments [0.03%]
人口与旧石器时代预史（三）：变动环境中的依赖食物的人口变迁
Charlotte T Lee,Cedric O Puleston,Shripad Tuljapurkar
Charlotte T Lee
The population dynamics of preindustrial societies depend intimately on their surroundings, and food is a primary means through which environment influences population size and individual well-being. Food production requires labor; thus, de...
Christian Guill
Christian Guill
The population dynamics of a consumer population with an internal structure is investigated. The population is divided into juvenile and adult individuals that consume different resources and do not interfere with each other. Over a broad r...
Kevin Higgins
Kevin Higgins
Metapopulation extinction risk is the probability that all local populations are simultaneously extinct during a fixed time frame. Dispersal may reduce a metapopulation's extinction risk by raising its average per-capita growth rate. By con...
The evolution of juvenile-adult interactions in populations structured in age and space [0.03%]
年龄和空间结构种群中juvenie-adult相互作用的演变
Sébastien Lion,Minus van Baalen
Sébastien Lion
We study the evolution of a spatially structured population with two age classes using spatial moment equations. In the model, adults can either help juveniles by increasing their survival, or adopt a cannibalistic behaviour and consume juv...
Antigenic distance and cross-immunity, invasibility and coexistence of pathogen strains in an epidemiological model with discrete antigenic space [0.03%]
抗原距离和交叉免疫性、病原菌株在离散抗原空间的流行病学模型中的可入侵性和共存性
Ben Adams,Akira Sasaki
Ben Adams
In models of pathogen interaction and evolution discrete genotypes in the form of bit strings may be mapped to points in a discrete phenotype space based on similarity in antigenic structure. Cross-immunity between strains, that is the redu...
The vitality model: a way to understand population survival and demographic heterogeneity [0.03%]
活力模型：理解人口生存和人口统计异质性的一种方法
Ting Li,James J Anderson
Ting Li
A four-parameter model describing mortality as the first passage of an abstract measure of survival capacity, vitality, is developed and used to explore four classic problems in demography: (1) medfly demographic paradox, (2) effect of diet...