BIOLOGY 1101 Lecture 20: Population Ecology
30 Nov 2016
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N = 1000, n = 50,000; n = 90,000. How life history affects survivorship and vice versa. 14. 7 life histories are shaped by natural selection a. Females usually die after weaning their first litter. Produces litters of six to ten offspring every month. Iv. a. b. c. a. b. c. b. c. d. e. b. c. An organism"s investment pattern in growth, reproduction, and survival is described by its life history. Very different strategies can achieve the same outcome in which a mating pair of individuals produces at least two surviving offspring. Show the proportion of individuals of a particular age that are alive in a population. High survivorship until old age, then rapidly decreasing survivorship. High mortality early in life, but those that survive the early years live long lives. Survivorship curves i. ii. i. ii. iii. iv. Triangular shape, high birth rates and high death rates in older individuals ii.
