Question

A population of frog exhibits Type Ill survivorship. In a population of these frogs, a disease strikes a predator that feeds on tadpoles, affecting the survivorship of the

frogs. Which of the following best represents the type of survivorship the frog population would move toward, given the loss of its main predator?
O
Number of survivors (10g scale)
(S) sous
Number of survivors (10 scale)
1000
1000
1000-
100
100
100
10
10
0
40 60 80 100
Percent of life span
20 40 60
Percent of life span
100
20 40 60 60 100
Percent of life span

Answer 1

The loss of a main predator for a frog population with a Type III survivorship curve would likely shift its curve towards a Type II or Type I, depending on the extent to which predation on young individuals is mitigated.

Step-by-step explanation:

If a population of frogs exhibits a Type III survivorship, it means that many individuals die young, and only a few live to old age. This is typically due to a high predation rate on the young.

If a disease strikes a predator that feeds on tadpoles, reducing the predation pressure on the frog's early life stages, the population would experience lower mortality rates in those stages.

As a result, the frog population's survivorship curve is likely to shift towards a Type II or even a Type I curve. With a Type II curve, mortality is relatively constant throughout the life span, and with a Type I curve, mortality is mostly concentrated among older individuals.