The Role of Advection in a Two-Species Competition Model: A Bifurcation Approach

2017 ◽  
Vol 245 (1161) ◽  
pp. 0-0 ◽  
Author(s):  
Isabel Averill ◽  
King-Yeung Lam ◽  
Yuan Lou
Keyword(s):  
Competition Model ◽  
Species Competition

scholarly journals Role of infochemical mediated zooplankton grazing in a phytoplankton competition model

2013 ◽  
Vol 16 ◽  
pp. 41-50 ◽  
Author(s):  
Nicola D. Lewis ◽  
Mark N. Breckels ◽  
Michael Steinke ◽  
Edward A. Codling
Keyword(s):  
Competition Model ◽  
Zooplankton Grazing

Psychobiological Responses to Competition in Women

2016 ◽  
Author(s):  
Raquel Costa ◽  
Miguel A. Serrano ◽  
Alicia Salvador
Keyword(s):  
Coping Strategies ◽  
Agonistic Behavior ◽  
Functional Role ◽  
Response Pattern ◽  
Competition Model ◽  
Stress Model ◽  
Evolutionary Perspective ◽  
Coping Response ◽  
Challenge Hypothesis

From an evolutionary perspective, questions have been raised about whether women have a psychobiological pattern similar to that of men. In humans, hormonal effects of competition and its outcome have been investigated under the biosocial status hypothesis, which proposes that, after a competition, winners would show increases in testosterone whereas losers would show reductions, and the challenge hypothesis, which emphasizes the functional role of testosterone increases in the spring to promote agonistic behavior related to territoriality and access to females. Subsequently, the coping competition model has defended the study of competition within a more general stress model, considering the psychobiological responses as part of the coping response. This chapter shows that women investigations are increasing in number in recent years and that, in competitive situations, they present coping strategies with a psychobiological response pattern that can be enlightened by the coping competition model.

scholarly journals An Extension of Two Species Lotka-Volterra Competition Model

2021 ◽  
Vol 8 (2) ◽  
pp. 90
Author(s):  
Idy BA ◽  
Papa Ibrahima NDIAYE ◽  
Mahe Ndao ◽  
AboubaKary Diakhaby
Keyword(s):  
Global Stability ◽  
Local Stability ◽  
Competition Model ◽  
Complete Analysis ◽  
Species Competition ◽  
Planar System ◽  
Saddle Node Bifurcation ◽  
Competitive Effects ◽  
Competition Effects ◽  
Competitive Species

Limiting resource is a angular stone of the interactions between species in ecosystems such as competition, prey-predators and food chain systems. In this paper, we propose a planar system as an extension of Lotka-Voterra competition model. This describes? two competitive species for a single resource? which are affected by intra and inter-specific interference. We give its complete analysis for the existence and local stability of all equlibria and some conditions of global stability. The model exhibits a rich set of behaviors with a multiplicity of coexistence equilibria, bi-stability, tri-stability and occurrence of global stability of the exclusion of one species and the coexistence? equilibrium. The asymptotic behavior and the number of coexistence equilibria are shown by a saddle-node bifurcation of the level of resource under conditions on competitive effects relatively to associated growth rate per unit of resource.Moreover, we determine the competition outcome in the situations of Balanced and Unbalanced intra-inter species competition effects. Finally, we illustrate results by numerical simulations.

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