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Rearing Young Of Other: Tn our own country there are significant differences in child-rearing among the diverse social groups. A teacher observed differences between the personality patterns of preschool children in Greenwich Village, New York, and those of children in the Tennessee mountains (53, 1946). A review of three important studies -of child-rearing practices leads to the conclusion that middle-class mothers in the regions studied were generally more permissive and less punitive toward their young children than were working-class mothers. (84, p. 446, 1957) Each culture has its unique methods of child nurture, which are reflected in the personalities of both children and adults.
Society finches are excellent breeders. They are splendid to use in rearing young of other small birds. They accept eggs of other birds in exchange for their own with no concern. They are hardy, except for the pure white strain, and prefer to breed in cages rather than in an aviary.
Although most fish farming is still based on techniques of partial culture, it is in the carefully controlled intensive-rearing system that most technological developments are taking place. For example, closed-circuit water recycling enables the farmers to remove waste products - mainly ammonia, urea and feed or waste solids - and return clean water to the rearing facility [3].
Fish grow more rapidly in warm water. For this reason, some fish farms are sited near power stations and farmers can make use of the warm waste water from cooling towers, previously regarded as a pollutant, in the recycling process to accelerate growth rates of fish and shellfish, thus saving on heating costs. In the United States the effluent from a thermal power station has been put to good use in the rearing of molluscs and lobsters, and in Britain flatfish have been grown in heated water from a nuclear power station.
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