Search for: [Abstract = "\(3\) Several examples 3 were found indicating that individual differences in respect to home range size \(Fig. 1\), to its localization \(Fig. 3\), and to trappability \(Fig. 2\) \-usually assigned to the rank in social hierarchy \-are simultaneously the differences between individuals of different age \(belonging to different cohorts Ko\-K4\). Additionally the example is given \(Fig. 4\) showing that home range size differences based upon age structure are much more pronounced under norma\! food conditions \(natural food supply\) than under the surplus of food \(supplementary food added\). At the same time indirect evidence was found of more tolerant social relationships between individuals in the period of experimentally increased food supply.\(4\) The hypothesis of age\-based social organization is helpful for explaining the ability of the population to maintain its stability in fluctuating environment.When the population is in the state of balance with its resources for some time, the age structure of the population is stable and so is its social hierarchy governing the unequal partitioning of the resources among individuals. But under critical \(suddenly worsened\) conditions the best chance for survival is given to the old individuals \-holding the highest social position, having largest home ranges and occupying the richest patches of habitat \-not to the ones best genetically suited to the new situation. This results in retardation of genetic and demographic response of population known from field and laboratory observations and named ''population inertia\". But it also makes possible for a population to rebuild itself according to the mode from before the crash. It is possible to achieve as surviving the crash old individuals maitain their highest ranks preserving both the former organization and the \"conservative'' gene pool. \(If we assume that the strongest selection occurs during the highest early mortality period, then those old individuals were selected long time ago, probably under different to present environmental conditions.\) So, those old, long\-living thanks to such social organization individuals preserve specific population \"memory'' which helps to keep the stability of population organization and processes despite environment fluctuations."]

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