[Campbell Biology P.1242] Based on Table 53.1 and the 'Survivorship Curves' section, if a sur... | Practice Question

Based on Table 53.1 and the 'Survivorship Curves' section, if a survivorship curve for Belding's ground squirrels began with a hypothetical cohort of 1,000 individuals, approximately how many would be alive at the start of the 2-3 year age interval?

  • A: 127
  • B: 197
  • C: 67
  • D: 252

Explanation

The 'Survivorship Curves' section explains that to plot a survivorship curve, you multiply the 'Proportion Alive at Start of Year' by the hypothetical beginning cohort e.g., 1,000 individuals . For the 2-3 year interval, the 'Proportion Alive at Start of Year ' from Table 53.1 is 0.197. Therefore, 0.197 1,000 = 197 individuals.