differential mortality การใช้

Differential mortality of predators and hoppers does not appear to be the primary factor for insecticide-induced resurgence.
The result was their book, " Differential Mortality in the United States " ( Harvard University Press, 1973 ), which remains in print.
Differential mortality during the Holocaust and " posttraumatic growth " associated with protective factors in Holocaust survivors or in their environment after World War II were suggested as explanations for these findings.
Another possible contributory factor is an aging population, with a higher than normal proportion of relatively elderly people : we recall that due to higher differential mortality rates the ratio of males to females reduces for each year of age.