Age Classes

Age Classes

 

a feature of the tribal era. In such a system the society is divided into several age categories, each having its own rights and obligations. In one form or another the division into age classes was an inherent characteristic of almost all the peoples of the world during this particular stage of social development. According to ethnological data, for example, the Australian aborigines, Papuans, African Zulus, and American Indians had three or four age classes (children, youths, adults, and elders). Having arisen from a natural di-vision of labor based on age and sex, age classes disappeared during the process of the social division of labor and the disintegration of the primitive communal system.

References in periodicals archive ?
The school has 98 pupils aged four to seven, taught in two ordinary and two mixed age classes, with three full-time and three part-time teachers, including the headteacher.
Competition was fierce in all age classes with FVO's Grace Molloy, fresh from her unprecedented three medals at the Junior Worlds, in recognition of which the club awarded her honorary life membership, being pipped to the top spot on W20L by Laura King of EUOC.
viridis less than 5 y old have significantly fewer stems and a reduced chance of flowering than older age classes (Dee and Palmer, 2018), timing of mowing can impact population age structure and influence population longevity.
Could we provide more harvest opportunities for hunters while still ending up with only larger-antlered bucks in the older age classes?
Duncan Birtwistle (M21), Alistair Landels (M50), David Lawson (M55), Peter Carey (M75), Trevor Simpson (M80), Nadine Wright (W21), Anne Straube (W40), Juliette Soulard (W45), Lesley Ross (W50), Jill Emmerson (W55) and Hilary Simpson (W80) were also crowned Midland champions in their respective age classes. The Wrekin was extremely challenging as usual.
Tenders are invited for the main aim of this contract is to clear any invasive species of all age classes in 5 mapped compartments over a 5-year period (2019-2023) in the national park and this is subject to funding being made available each yeartype of contract: services
Figure 2a shows the differences in the distribution of growing stock according to age classes expressed as a percentage.
Last year, 28 percent of all deer harvested were in the 0.5-year and 1.5-year age classes, while 49 percent of the harvest was in the 3.5-year and 4.5-year age classes.
The standard distance triathlon (individual and team relay) will be disputed over 1.5km swim-40km bike-10km run while the long distance triathlon (individual and team relay) is set over 1.5km swim-60km bike-15km run), both in various age classes.
Depending on functional form of the nonlinear terms, a crude conclusion found in several of the papers referred to above is that, in case of small population densities, the models possess a stable nontrivial equilibrium where all age classes are populated.
Age class data were tested for randomness using a Goodness of Fit test comparing the distribution of specimen age classes to a Gaussian distribution generated using Excel (Microsoft 2013) based on the collected data.