For example, this theory was confirmed by Austad in a natural environment by comparing mainland opossums that are subject to predation to a population of opossums living on an island free of predators (Austad 1993).
This means bleaching will most likely occur when many fishes are at their most vulnerable: when they are small, settling naïve to reef based predators, and subject to high predation pressure.
One hypothesis posits that these kinds of "bluff" displays are targeted toward predators that are subject to attacks from predators themselves (i.e., mesopredators), such as small passerines and rodents (cf. Edmunds 1974; Olofsson et al. 2011) because risking its own life by calling a possible bluff may not be worth the cost to a mesopredator (Ruxton 2005).
For example, for drifting herbivores in the savannas, moving in very large herds and subject to individual attacks of predators, the likelihood that they are hunted in the way we describe here is evident [23].
One explanation for the strong response of the domestic fowl when confronting peacock butterflies is that, being poorer flyers, they are particularly alert and vigilant when foraging on the ground because they are more subject to attacks from terrestrial predators than are passerines.
The play makes points about scapegoated minorities (represented by wolves, who are suspected of blowing down homes and subject to a looming Anti-Predator Act) but never belabors them.
Life in the ocean is a life of extremes; subject to surges of water, currents, predators and prey.
Therefore, time delays would make the prey-predator system subject to periodic oscillations via a local Hopf bifurcation, and destroy the stability of the system.
In this paper, we consider the system subject to equations (1) when the predator population is subject to an Allee effect which is more general than described by the system of equations (3.1) in [2], and we also use the center manifold theory for non-hyperbolic equilibrium points [3].
As the intensity of the Allee effect increases, the domain of epidemic invasion reduces and the system dynamics is changed from the stable state to the limit cycle and finally becomes the chaotic state when the susceptible prey with the Allee effect, but the domain expands and the system dynamics is changed from limit cycle to a table point when the predator is subject to the Allee effect.
