1 In our graph, both prey and predator populations increase as the number of prey increases, but when the prey population exceeds about 350, the predators seem to overwhelm their prey to the extent that there are more and more predators, but a declining prey population. The predators continue...
A new predator–prey model with cross-dispersal among patches is constructed. A new cross-dispersal matrix is established by the coupling relationship between vertices. First, an existence theorem of the positive equilibrium for the new model is obtained. Secondly, based on the idea of constructing...
In this study, we consider a prey–predator model with prey refuge and intraspecific competition between predators using the Crowley–Martin functional response and investigate the dynamic characteristics of spatial and nonspatial prey–predator systems via both analytical and numerical methods. The local...
The stability of the system falls into four categories, based on the predator-prey population, or limit-cycle, graph behaviour. An 'unstable spiral' spirals away from the initial condition, yielding population oscillations that grow without bound. A 'neutral centre' indicates a closed loop, where...
Predation potential is the propensity of the predators in a habitat to consume prey, given the species composi- tion of the predator guild, predator abundance and food preferences, and the availability of alternative food resources. Predation pressure is the frequency of predatory attacks on prey....
The relationship between prey carrying capacity and temperature can range from near-independence to monotonically declining/increasing to hump-shaped. Predators persist in a U-shaped region in resource supply (=enrichment)-temperature space. Type II responses yield stable persistence in a U-shaped band...
Perhaps, once males are positioned in polynyas, wind-driven sea ice production and polynya size changes may not affect the prey availability or male foraging activity during the remainder of the winter season. These results compliment several studies emphasizing the complexity of wind-driven sea ice...
Predator/prey cycles refer to the cyclical relationship of a population of animal A (the prey), and the population of animal B (the predator), an animal that feeds on animal A. An increase in the population of animal A will eventually result in an increase in the population of animal B...
Circles and Spirals: Population Persistence in a Spatially Explicit Predator-Prey Model. 来自 EBSCO 喜欢 0 阅读量: 54 作者:Gurney,SC W.,Veitch,R A.摘要: Presents a study in which the Rosenzweig-McArthur model was used to clarify the relationship between discrete and continuous deterministic ...
A mathematical eco-epidemiological model consisting of harvested prey–predator system involving fear and disease in the prey population is formulated and studied. The prey population is supposed to be separated into two groups: susceptible and infected.