This effectively means that populations of organisms must have reached a certain measurable level of difference to be recognised as subspecies. Dean Amadon proposed in 1949 that subspecies would be defined according to the seventy-five percent rule which means that 75% of a population must lie outside 99% of the range of other populations for a given defining morphological character or a set of characters. The seventy-five percent rule still has defenders but other scholars argue that it should be replaced with ninety or ninety-five percent rule.
This effectively means that populations of organisms must have reached a certain measurable level of difference to be recognised as subspecies . Dean Amadon proposed in 1949 that subspecies would be defined according to the seventy - five percent rule which means that 75 % of a population must lie outside 99 % of the range of other populations for a given defining morphological character or a set of characters . The seventy - five percent rule still has defenders but other scholars argue that it should be replaced with ninety or ninety - five percent rule .
Who proposed subspecies be defined by the seventy-five percent rule?
Who proposed subspecies be defined by the seventy - five percent rule ?
Dean Amadon
Dean Amadon