Delayed density dependence and oscillatory population dynamics in overlapping-generation systems of a seed beetle Callosobruchus chinensis: matrix population model

Oecologia ◽  
1996 ◽  
Vol 105 (1) ◽  
pp. 116-125 ◽  
Author(s):  
Masakazu Shimada ◽  
Midori Tuda
Keyword(s):  
Population Dynamics ◽  
Density Dependence ◽  
Population Model ◽  
Callosobruchus Chinensis ◽  
Matrix Population Model ◽  
Seed Beetle ◽  
Overlapping Generation ◽  
Delayed Density Dependence

scholarly journals The Kinship Matrix: Inferring the Kinship Structure of a Population From Its Demography

2021 ◽  
Author(s):  
Christophe F. D. Coste ◽  
François Bienvenu ◽  
Victor Ronget ◽  
Sarah Cubaynes ◽  
Samuel Pavard
Keyword(s):  
Population Dynamics ◽  
Life Cycle ◽  
General Formula ◽  
Population Model ◽  
Matrix Population Model ◽  
Expected Number ◽  
Kinship Matrix ◽  
Structured Population ◽  
Kinship Structure ◽  
General Method

AbstractThe familial structure of a population and the relatedness of its individuals are determined by its demography. There is, however, no general method to infer kinship directly from the life-cycle of a structured population. Yet this question is central to fields such as ecology, evolution and conservation, especially in contexts where there is a strong interdependence between familial structure and population dynamics. Here, we give a general formula to compute, from any matrix population model, the expected number of arbitrary kin (sisters, nieces, cousins, etc) of a focal individual ego, structured by the class of ego and of its kin. Central to our approach are classic but little-used tools known as genealogical matrices, which we combine in a new way. Our method can be used to obtain both individual-based and population-wide metrics of kinship, as we illustrate. It also makes it possible to analyze the sensitivity of the kinship structure to the traits implemented in the model.

scholarly journals Regulation of Aedes aegypti Population Dynamics in Field Systems: Quantifying Direct and Delayed Density Dependence

2013 ◽  
Vol 89 (1) ◽  
pp. 68-77 ◽  
Author(s):  
Rachael K. Walsh ◽  
Fred Gould ◽  
Alun L. Lloyd ◽  
Thomas W. Scott ◽  
Janine M. Ramsey ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Aedes Aegypti ◽  
Density Dependence ◽  
Delayed Density Dependence ◽  
Field Systems ◽  
Aegypti Population

Dynamic Regimes of Local Homogeneous Population with Delayed Density Dependence

2015 ◽  
Vol 10 (2) ◽  
pp. 309-324 ◽  
Author(s):  
Г.П. Неверова ◽  
G.P. Neverova
Keyword(s):  
Population Dynamics ◽  
Density Dependence ◽  
Population Size ◽  
Chaotic Attractor ◽  
Time Lag ◽  
Stable State ◽  
Periodic Oscillations ◽  
Homogeneous Population ◽  
Delayed Density Dependence ◽  
Period 2

It is researched a model of limited homogeneous population size. It is assumed that there is delayed density dependence. It is made the analytical and numerical investigation of the model with different time lag. It is shown there it is the phenomenon of multiregimism. This phenomenon consists in the existence of various dynamic regimes under the same values of parameters. This effect arises in the model that simultaneously possesses several different limit regimes: stable state, regular fluctuations, and chaotic attractor. The research results show if present population dynamics substantially depends on population size of previous years than it is observed quasi-periodic oscillations. Fluctuations with period 2 occur when the growth of population size is regulated by density-dependence in the current year.

Numerical Analysis of the Age-Sex-Structured Population Dynamics Taking into Account Spatial Diffusion

2005 ◽  
Vol 10 (4) ◽  
pp. 365-381 ◽  
Author(s):  
Š. Repšys ◽  
V. Skakauskas
Keyword(s):  
Population Dynamics ◽  
Numerical Analysis ◽  
Population Model ◽  
Local Stability ◽  
Deterministic Model ◽  
Random Mating ◽  
Spatial Diffusion ◽  
Neumann Problems ◽  
Structured Population ◽  
Structured Population Dynamics

We present results of the numerical investigation of the homogenous Dirichlet and Neumann problems to an age-sex-structured population dynamics deterministic model taking into account random mating, female’s pregnancy, and spatial diffusion. We prove the existence of separable solutions to the non-dispersing population model and, by using the numerical experiment, corroborate their local stability.

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