Two further conditions make territory important for regulating populations. First, to have density dependent regulation, a species' regulating
mechanism must have information of its own population density. Second, a predator ideally should keep its prey at that population level which
permits the greatest rate of production. The means that the prey would not normally be particularly scarce. This, combined with the varied
prey of the birds and the varied predators of the insects, would make food density a poorer criterion of a given bird species' density than size of territory. Thus, competition for food would be reduced from a "scramble" to a "contest" (Haldane
~VN
Two further conditions make territory important for regulating populations. First, to have density dependent regulation, a species' regulatingmechanism must have information of its own population density. Second, a predator ideally should keep its prey at that population level whichpermits the greatest rate of production. The means that the prey would not normally be particularly scarce. This, combined with the variedprey of the birds and the varied predators of the insects, would make food density a poorer criterion of a given bird species' density than size of territory. Thus, competition for food would be reduced from a "scramble" to a "contest" (Haldane~VN
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