predator-prey;
reaction-diffusion;
time delay;
bifurcation;
pattern formation;
D O I:
10.1007/BF00160498
中图分类号:
Q [生物科学];
学科分类号:
07 ;
0710 ;
09 ;
摘要:
We consider a predator-prey system in the form of a coupled system of reaction-diffusion equations with an integral term representing a weighted average of the values of the prey density function, both in past time and space. In a limiting case the system reduces to the Lotka Volterra diffusion system with logistic growth of the prey. We investigate the linear stability of the coexistence steady state and bifurcations occurring from it, and expressions for some of the bifurcating solutions are constructed. None of these bifurcations can occur in the degenerate case when the nonlocal term is in fact local.
机构:
Univ Fed Rio de Janeiro, Inst Matemat, Ctr Tecnol, Ave Athos da Silveira Ramos 149,Bloco C, BR-21941909 Rio De Janeiro, RJ, BrazilUniv Fed Rio de Janeiro, Inst Matemat, Ctr Tecnol, Ave Athos da Silveira Ramos 149,Bloco C, BR-21941909 Rio De Janeiro, RJ, Brazil
Amorim, Paulo
Telch, Bruno
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机构:
Univ Fed Rio de Janeiro, Inst Matemat, Ctr Tecnol, Ave Athos da Silveira Ramos 149,Bloco C, BR-21941909 Rio De Janeiro, RJ, BrazilUniv Fed Rio de Janeiro, Inst Matemat, Ctr Tecnol, Ave Athos da Silveira Ramos 149,Bloco C, BR-21941909 Rio De Janeiro, RJ, Brazil
Telch, Bruno
Villada, Luis M.
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机构:
Univ Bio Bio, GIMNAP Dept Matemat, Casilla 5-C, Concepcion, Chile
Univ Concepcion, CI2MA, Casilla 160-C, Concepcion, ChileUniv Fed Rio de Janeiro, Inst Matemat, Ctr Tecnol, Ave Athos da Silveira Ramos 149,Bloco C, BR-21941909 Rio De Janeiro, RJ, Brazil
机构:
Wenzhou Univ, Coll Math & Informat Sci, Wenzhou 325035, Peoples R ChinaWenzhou Univ, Coll Math & Informat Sci, Wenzhou 325035, Peoples R China
Zhu, Yanuo
Cai, Yongli
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机构:
Sun Yat Sen Univ, Sch Math & Computat Sci, Guangzhou 510275, Guangdong, Peoples R ChinaWenzhou Univ, Coll Math & Informat Sci, Wenzhou 325035, Peoples R China
Cai, Yongli
Yan, Shuling
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机构:
Wenzhou Univ, Coll Math & Informat Sci, Wenzhou 325035, Peoples R ChinaWenzhou Univ, Coll Math & Informat Sci, Wenzhou 325035, Peoples R China
Yan, Shuling
Wang, Weiming
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机构:
Wenzhou Univ, Coll Math & Informat Sci, Wenzhou 325035, Peoples R ChinaWenzhou Univ, Coll Math & Informat Sci, Wenzhou 325035, Peoples R China