1. Consider the data in Figure 46.11 illustrating the survivorship curve of the

Question

1. Consider the data in Figure 46.11 illustrating the survivorship curve of the lime swallowtail butterfly. As indicated in your text, the survivorship from the egg to larval stage is 68%. Calculate the survivorship from the larval to pupal stage a. Stage Approximate duration Number alive Survivorship Egg 5 days Larva 18 days Pupa 15 days Adult 5 days 250 170 158 71 0.68 0.93 0.45 b. The survivorship curve for a cohort of 250 butterfly eggs shows high 300 2 250 eggs mortality at the laid egg and pupal stages. 250 158 larvae become pupae 200 170 eggs become 150 71 pupae 100 adults D 50 0 5 10 15 20 25 30 35 40 Egg Larva Pupa Adult Bvalogye How Lite Wonks, Seoond Eciton 2014 W.H Preeman and Gompeny 40% (0.40) 68% (0.68) 93% (0.93) 45% (0.45) Instructional Guidance: This question gives students practice with calculations related to life tables. Score: 1 of 1

Explanation / Answer

The number of larva which is alive is 170 , on the other hand 158 is the number which represents live pupa. So if we want to calculate the survivorship between larval to pupal stage, we can calculate on the basis of percentage.

So, 158 is alive to go towards pupal stage from 170 larva,

the survivorship is 158/170= 0.92.9 or 0.93

thus the percentage of survisorship = 0.93 X 100= 93%

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