GG272 Study Guide - Final Guide: Overgrazing, Pesticide, Overexploitation
Document Summary
Fertility: the actual reproductive performance of an individual, a couple, a group or a population, differences in fertility account for most of the variable pattern of population growth at a global scale. Number of live births in a yr x 1000 mid-year population: usefulness. Not totally satisfactory, especially when detailed comparisons are desired. Does not account for age and sex structure of the population. Masks age and sex differentials: general fertility rate (gfr, relates births more closely to the potential reproductive population - females, the number of live births per 1000 women of childbearing age. Number of live births in a yr x 1000. Number of women aged 15-49: age specific birth rate (asbr, allows for a precise determination of where reproduction is occurring in a population. Number of live births in age group y x 1000. Number of females in age group y: problems. It is a tedious calculation to repeat each year.
