BIOL208 Lecture Notes - Cohort Analysis, Monogamy
9 Apr 2014
School
Department
Course
Professor
Document Summary
*only exception: if one sex costs more to reproduce than the other more expensive gender will be selected against: *don"t expect a 1:1 ratio in small populations, sex ratios change in different age ranges: *at birth the ratio of males to females is 1. 07 but at ages of >65, the ratio drops to 0. 79. Healthy population growth: *more developed regions have a more diverse age ranges. 100 50 25 12 6 etc (you get a line resembling the blue line in the graph above) There is no age dependence on mortality: older individuals do not have a higher mortality rate than juveniles. Cohort analysis was important for this discovery (following organisms until their death: this assumes that the population does not grow or shrink outside of death. Information is standardized if 250 individuals counted, and they wanted to standardize it to 1000 individuals, they would multiply all values by 4.
