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