Abstract
A lottery competition occurs among species when individuals compete for access to units of resource without which they cannot join the adult (breeding) population. It is a form of interference competition in which the chance of an individual's winning or losing is largely determined by priority of arrival at a vacant unit of resource. Resources involved may be such things as living sites for sessile or sedentary species, or nest sites, or spawning or display sites. Such resources become available for reoccupancy on the death or departure of the current owner. Lottery competition may be particularly important in marine demersal forms which produce large numbers of pelagic larvae which disperse prior to settling into adult habitat. Lottery competitive systems are inherently unstable but can be persistent under a wide range of conditions (Chesson and Warner 1981). A simulation model is developed to explore the effect on local persistence of differences among the competing species in (1) their survivorship af...
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