1) The life table below shows the survivorship of one cohort of an imaginary spe
ID: 152101 • Letter: 1
Question
1) The life table below shows the survivorship of one cohort of an imaginary species of lemur over the course of eight years (their maximum life span).
Age (years)
Number alive at start of year
Proportion alive at start of year
Number of deaths during year
Proportion of deaths during year
Age specific birthrate
0
100
1
5
.050
0
1
95
.95
4
.042
0
2
91
.91
3
.033
0
3
88
.88
7
.080
1
4
81
.81
2
.025
2
5
79
.79
5
.063
2
6
74
.74
31
.419
2
7
43
.43
43
1
1
Which of the following describes the life history of these lemurs?
A) iteroparous
B) type III survivorship curve
C) type II survivorship curve
D) constant probability of dying per year
E) high infant mortality
Age (years)
Number alive at start of year
Proportion alive at start of year
Number of deaths during year
Proportion of deaths during year
Age specific birthrate
0
100
1
5
.050
0
1
95
.95
4
.042
0
2
91
.91
3
.033
0
3
88
.88
7
.080
1
4
81
.81
2
.025
2
5
79
.79
5
.063
2
6
74
.74
31
.419
2
7
43
.43
43
1
1
Explanation / Answer
A) iteroparous best describes the population as, we can see that the birth rates are different at different age. That means that they can breed several times during their life peroid. This shows the type 1 survivorship curve because the morality rate of is high near the end of the life span. And those which show type 1 survivorship curve is mostly iteroparous.
And all other options are incorrect because this type of population will not show type 1 or 3 survivorship curve. And the probability of dying individuals per year is also not constant and the infant mortality rate is low.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.