Crouse et al. (1987) considered the following seven stages in the life of loggerhead sea turtles (Caretta caretta): (1) eggs and hatchlings ( 23 years). Only the last three stages reproduce with female fecundities of 127, 4, and 80 per year, respectively. Table 13.3.5 gives the probabilities per year of a stage From turtle surviving and remaining at or advancing to stage To.

 

a. Give the Lefkovitch matrix for this model.

b. Determine the dominant eigenvalue and the annual growth rate. Do you expect the animal’s numbers to grow or decline?

c. Give the annual mortality rate for stage 1 animals.

d. Give the annual mortality rate for stage 2 animals.

e. Give the annual mortality rate for stage 3 animals.

f. Give the annual mortality rate for stage 4 animals.

g. Give the annual mortality rate for stage 5 animals.

h. Give the annual mortality rate for stage 6 animals.

i. Give the annual mortality rate for stage 7 animals.

j. Draw a state diagram for the animal.

k. Determine the sensitivity of λ to each parameter indicated in Table 13.3.5.

Transcribed Image Text:

Table 13.3.5 The Probabilities per Year of a Stage From Loggerhead Sea Turtle Surviving to Stage To From Stage 1 2 2 3 3 4 4 5 6 7 To Stage 2 2233&567T 4 4 Probability per Year 0.6747 0.7370 0.0486 0.6611 0.0147 0.6907 0.0518 0.8091 0.8091 0.8089 Table 13.3.5 The Probabilities per Year of a Stage From Loggerhead Sea Turtle Surviving to Stage To From Stage 1 2 2 3 3 4 4 5 6 7 To Stage 2 2233&567T 4 4 Probability per Year 0.6747 0.7370 0.0486 0.6611 0.0147 0.6907 0.0518 0.8091 0.8091 0.8089

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