BIOL 2060 Lecture Notes - Lecture 8: Net Reproduction Rate, Survivorship Curve, Life Table

• School: University of Guelph
• Department: Biology
• Course: BIOL 2060
• Professor: Chris Caruso

Document Summary

Example(cid:198)cohort life table for phlox: where mx is the number of female offspring produced per female in each age interval. The net reproductive rate (r0: r0 > 1 (cid:198)the population will increase in size, r0 = 1 (cid:198)the population size will not change, r0 < 1 (cid:198)the population will decrease in size. Intrinsic rate of increase (r) r > 0(cid:198)population size will increase r = 0(cid:198)population size will be stable r < 0(cid:198)population size will decrease. Intrinsic rate of increase can vary within a species. Example(cid:198)using the cohort life table for the pholox: r0 = 2. 4177, t = 334. 40 days r = 2. 64 x 10-3. Factors that increase r: reduction in age at first reproduction. Increase in the number of progeny in each reproductive event. Tophat question: we are studying a population of a threatened weasel species (population a). No weasels survive to reach 4 years of age.