BIOL 1001 Study Guide - Final Guide: Arabidopsis Thaliana, Mustard Plant, Survivorship Curve
Document Summary
If 1000 females were born in a particular year in this population, on average 424 would still be alive one year later. Survivorship from birth to age two was 0. 308 meaning an average of 308 female lizards would survive for two years. Biologists keep track of females when calculating life table data because the number of males present rarely affects population dynamics. There are always enough males present to fertilize all of females in breeding condition, so population growth rates depend entirely on females. To analyze general patterns in survivorship, biologists plot logarithm of number of survivors versus age. Survivorship curve- a graph depicting the percentage of population that survives to different ages. Three general types of survivorship curves exist. Survivorship throughout the life is high most individuals approach the species" maximum life span. Individuals have about the same probability of dying in each year of life.
