The biology of pastoral man as a factor in conservation

摘要: Abstract This paper discusses the basic relationship between dietetic needs of pastoral people, number stock they must keep to supply these needs, and productive capacity environment. While overgrazing erosion in areas is usually attributed ‘prestige’ overstocking, it shown here that there a minimum animals required support human family. requirement about 3 Standard Stock Units each 500 kg live-weight per head, but varies from 2·5–4·5 according ecological conditions, made up various classes are kept for meat or milk. Where rising population becomes too great permit family maintain this necessary herd, damage environment through overstocking inevitable. In addition, by competing available milk supply, peoples inevitably starve calves depress quality their stock, especially where populations high. The prevalent ‘overgrazing’ situation seen as one over-population many areas—requiring removal humans, alteration habits, well mere reduction numbers. Possible methods alleviating include partial dependence on bought grain, settlement irrigation schemes, none easy short-term.