Survivorship Curve: Types & Examples

What is a survivorship curve? A scientific analysis of the likelihood of death in various species. A graph that measures the proportion of human life span related to geographical location. A graph that measures the proportion of individuals in a given species that are alive at different ages. A scientific analysis on the highest cause of death among various species.

A graph that measures the proportion of individuals in a given species that are alive at different ages.

Elephants have a high probability of living into middle age and adulthood. After becoming adults, their chances of dying increase greatly. Which type of survivorship curve depicts an elephant's life? Type IV Type II Type III Type I

Type I

what are the three types of survivorship curves?

Type I Type II Type III

Small mammals, such as rabbits, have many predators and are often hunted by humans or killed on the roadways. They often die at various ages. This is an example of which type of survivorship? Type II Type I Type IV Type III

Type II

Sea turtles lay hundreds of eggs with the hope that a few of their offspring will survive to adulthood. This is an example of which type of survivorship curve? Type I Type II Type IV Type III

Type III

survivorship curve

a graph that measures the proportion of individuals in a given species that are alive at different ages

how is type III survivorship curve plotted on the graph?

as a concave curve on a graph.

how is type I survivorship curve plotted on the graph?

as a convex curve on a graph

how is type II survivorship curve plotted on the graph?

as a diagonal line going downward on a graph.

type III survivorship curve

depicts species where few individuals will live to adulthood and die as they get older because the greatest mortality for these individuals is experienced early in life

how is Type II survivorship curves used?

for animals, such as birds, who have many random chances of being killed or dying at all stages of their life

what is an example of type III survivorship?

frogs

how is the age of survivorship typically plotted on the graph?

on the x-axis

how is the number of individuals of the population typically plotted on the graph?

on the y-axis

type II survivorship curve

shows a roughly constant mortality rate for the species through its entire life

type I survivorship curve

shows individuals that have a high probability of surviving through early and middle life but have a rapid decline in the number of individuals surviving into late life

what does type I survivorship curve mean?

that most of the individuals will make it to adulthood but the proportion surviving into old age is greatly decreased

what does type II survivorship curve mean?

that the individual's chance of dying is independent of their age

what does type III survivorship curve mean?

the chance of dying decreases with age because mortality in the early stages of life is higher

what is an example of type I survivorship curve?

the human population

There are ______ types of survivorship curves. five two three four

three