“…The concept of the functional response was first introduced by Solomon (1949). The carrying capacity of the predator's environment is assumed to be proportional to the prey abundance, i.e., (x+k 2 )/h, which is called as a modified Leslie-Grower term [2]. The functional response p(x) has been developed during various different processes of energy transfer (see [35]).…”
Section: Hongwei Yin Xiaoyong Xiao and Xiaoqing Wenmentioning
confidence: 99%
“…For simplicity, we apply the following transformation to the variables and the parameters in the system (3) x = k 1 u, y = v/k 1 , ak 2 1 =ā, bk 1 =b, τ = k 1 t, s 2 k 1 = η, r = h/k 2 1 , k 2 /k 1 = k, and we still use a, b to stand forā,b. Thus (3) becomes the following form:…”
Section: Hongwei Yin Xiaoyong Xiao and Xiaoqing Wenmentioning
In this paper, a Lévy-diffusion Leslie-Gower predator-prey model with a nonmonotonic functional response is studied. We show the existence, uniqueness and attractiveness of the globally positive solution to this model. Moreover, to its corresponding steady-state model, we obtain the stability of the semi-trivial solutions, the existence and nonexistence of coexistence states by the method of topological degree, the uniqueness and stability of coexistence state, and the multiplicity and stability of coexistence states by Grandall-Rabinowitz bifurcation theorem. In addition, to get these results, we study the property of the Lévy diffusion operator, and give out the comparison principle of the generalized parabolic Lévy-diffusion differential equation, as well as the existence and stability of the solution for the steady-state Logistic equation with Lévy diffusion. Furthermore, we obtain the comparison principle of the steady-state Lévy-diffusion equation. As far as we know, these results are new in the ecological model.
“…The concept of the functional response was first introduced by Solomon (1949). The carrying capacity of the predator's environment is assumed to be proportional to the prey abundance, i.e., (x+k 2 )/h, which is called as a modified Leslie-Grower term [2]. The functional response p(x) has been developed during various different processes of energy transfer (see [35]).…”
Section: Hongwei Yin Xiaoyong Xiao and Xiaoqing Wenmentioning
confidence: 99%
“…For simplicity, we apply the following transformation to the variables and the parameters in the system (3) x = k 1 u, y = v/k 1 , ak 2 1 =ā, bk 1 =b, τ = k 1 t, s 2 k 1 = η, r = h/k 2 1 , k 2 /k 1 = k, and we still use a, b to stand forā,b. Thus (3) becomes the following form:…”
Section: Hongwei Yin Xiaoyong Xiao and Xiaoqing Wenmentioning
In this paper, a Lévy-diffusion Leslie-Gower predator-prey model with a nonmonotonic functional response is studied. We show the existence, uniqueness and attractiveness of the globally positive solution to this model. Moreover, to its corresponding steady-state model, we obtain the stability of the semi-trivial solutions, the existence and nonexistence of coexistence states by the method of topological degree, the uniqueness and stability of coexistence state, and the multiplicity and stability of coexistence states by Grandall-Rabinowitz bifurcation theorem. In addition, to get these results, we study the property of the Lévy diffusion operator, and give out the comparison principle of the generalized parabolic Lévy-diffusion differential equation, as well as the existence and stability of the solution for the steady-state Logistic equation with Lévy diffusion. Furthermore, we obtain the comparison principle of the steady-state Lévy-diffusion equation. As far as we know, these results are new in the ecological model.
“…By take above considerations, Ali and Jazar [2] consider a prey-predator model which incorporates a modified version of the Leslie type functional response parameters, in which c measures the magnitude of interference among prey. Further, a 2 describes the growth rate of predator v; e is the maximum value which per capita reduction rate of v can attain, f measure the extent to which environment provides protection to predator v.…”
Abstract.In this paper, we study a modified Leslie-Gower prey-predator model with Crowley-Martin functional response. The stability and instability of the trivial and semi-trivial solutions was studied by analyzing the eigenvalues of the linearized system. The existence, multiplicity and uniqueness of positive steady state solutions were shown by using bifurcation theory, degree theory, energy estimate and asymptotic behavior analysis. Furthermore, all results were characterized in parameter plane.
“…a means the intraspecific competition strength, c measures the per capita reduction rate, h characterises the safeguard of the environment and f possesses the like signification of c. In the past two decades, model (1) and its generalisations have been subjected to intensive research, and a mass of attractive features have been provided. For example, Aziz-Alaoui and Okiye [1] tested the boundedness and global stability of model (1); Guo and Song [2] dissected model (1) perturbed by the impulse; Abid et al [3] probed into the optimal control of model (1); see [3][4][5][6][7][8][9][10][11][12][13][14][15] for more related outcomes. The parameters in model (1) are hypothesised to be deterministic, which neglects the environmental perturbations, and hence model (1) cannot accurately depict the real situations.…”
In this paper, we use an Ornstein-Uhlenbeck process to describe the environmental stochasticity and propose a stochastic predator-prey model with modified Leslie-Gower and Holling-type II schemes. For each species, sharp sufficient conditions for persistence in the mean and extinction are respectively obtained. The results demonstrate that the persistence and extinction of the species have close relationships with the environmental stochasticity. In addition, the theoretical results are numerically illustrated by some simulations.
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