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a search image of a prey species such that they concentrate on one prey type while ignoring another. As the rare prey (A) become ...
The success with which predators catch prey depends upon the density of the pred- ator population. Predators usually react to th ...
has been observed in northern Canada when numbers of their primary prey, snow- shoe hares, collapse. The initial increase in num ...
some of Holling’s small mammals (Fig. 10.8a) and for wolves eating moose (Fig. 10.8b) (Boutin 1992). In Fig. 10.7 these total re ...
was density dependent in winter and was probably regulating the prey (Thirgood et al. 2000). Regulation was due at least partly ...
density, B, so that when foxes reinvaded the experimental area rabbit numbers con- tinued towards C. The “forty-mile” caribou he ...
Figure 10.7b shows the case where predators have no regulatory effect but can cause the extinction of the prey species if prey n ...
A similar result was observed in southern Sweden with forest fragments embed- ded in an agricultural landscape. Andren (1992) re ...
Cougar (Puma concolor) appear to be having an inverse density-dependent effect, destabilizing bighorn sheep (Ovis canadensis) po ...
The opposite behavior to herding is shown by many female ungulates when they give birth. At that time they leave the herd and be ...
Some of the important points for conservation and management that we can derive from this discussion of predation are as follows ...
11 Parasites and pathogens This chapter introduces parasitism and disease within wildlife populations. It addresses how an infec ...
The role of disease in mammals can be generalized to all vertebrates (Yuill 1987). Parasites can be expected in all wildlife spe ...
=−γI (11.2) Here we assume γis a constant and that transmission is directly related to the proportion of infected individuals in ...
This makes the point that R 0 is dependent upon host density. Note that if the para- site is highly virulent (large α), if recov ...
4 the incubation period; 5 the recovery rate; 6 the disease-induced mortality rate. Brucellosis in Yellowstone National Park Bru ...
a potential spread of foot and mouth disease of 2.8 km per day through a popula- tion of feral pigs in Australia. Parasites usua ...
interaction of food and parasites. Overwinter survival was 56% in control animals (unfed and normal worm burdens). In unfed but ...
behaviors. Other general responses are unusual levels of activity, disorientation, and altered responses to stimuli. Three lines ...
From 1961 to 1976 an Africa-wide cattle vaccination campaign (called JP-15) aimed to eradicate the disease from cattle and there ...
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