What animals have a Type 1 survivorship curve?
Humans and most primates have a Type I survivorship curve. In a Type I curve, organisms tend not to die when they are young or middle-aged but, instead, die when they become elderly.
What animal has a Type 2 survivorship curve?
For populations with Type II survivorship, the mortality of an individual does not depend on its age. Commonly listed examples of this include rodents, adult birds, and certain turtle species.
What is a Type 3 survivorship curve?
Type III or concave curves have the greatest mortality (lowest age-specific survival) early in life, with relatively low rates of death (high probability of survival) for those surviving this bottleneck. This type of curve is characteristic of species that produce a large number of offspring (see r/K selection theory).
What does Type 1 survivorship curve mean?
A 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 is the most common survivorship curve?
The Type I curve, illustrated by the large mammals, tracks organisms that tend to live long lives (low death rate and high survivorship rate); toward the end of their life expectancies, however, there is a dramatic increase in the death rate.
How is survivorship calculated?
To calculate l1, survivorship from age 0 to age 5, subtract the proportion of the population dying during that interval from 1.0 (i.e., l1 = l0 – proportion dying during interval 0). To calculate survivorship for age group 2, subtract the proportion dying during period 2 (6-10 years) from l1.
What is the difference between survival rate and survivorship?
_______ may determine reproductive rate, not age. survivorship is the proportion of individuals that survive from birth to age x. survival is the change that and individual of age x will survive to age x+1. How can survivorship vary among groups?
Which type of organism would be most likely to have a type II survivorship curve?
Answer: many birds species have type ii survivorship curve. Explanation: A type ii survivorship curve is a curve that shows the constant mortality rate of the species in relation to their age.
What is a late loss survivorship curve?
Type 1 is the late loss survivorship curve. This means that mortality is very low in the infant, juvenile, and adult years. Type 2 is the constant loss survivorship curve. This means that mortality is very high during early life stages, followed by a very low death rate for the individuals reaching adulthood.
Are turtles Type 2 survivorship curve?
Worldwide, reptile populations are in decline due to habitat destruction and human disturbances. Healthy populations of turtles normally show this type of survivorship curve, where there is nearly equal probability of death for all ages (Frazer 1991). A Type II survivorship curve is linear, with a negative slope.
What survivorship curve are squirrels?
Type II survivorship curve
Which type of survivorship curve develops when death is common at any age?
Survivorship Curves Birds have a Type II survivorship curve, as death at any age is equally probable. Trees have a Type III survivorship curve because very few survive the younger years, but after a certain age, individuals are much more likely to survive.
Do elephants have a Type 1 survivorship curve?
Elephants have a Type I survivorship curve (mortality increases with age), and fecundity decreases with age.
What type of survivorship curve Do turtles have?
type I11 survivorship curve
Which characteristics would lead to a population being most likely to have a type III survivorship curve?
Type III curves occur in populations with high mortality in early age classes and very low mortality in older individuals. Populations displaying a Type III survivorship curve generally need to have high birth rates in order for the population size to remain constant.
Which of these best describes Type 2 survivorship?
Calculate the Price
| According to the logistic growth model, what happens to a population when the size of the population reaches carrying capacity? | the growth rate is zero |
|---|---|
| Which of these best describes Type II survivorship? | survivorship is constant over the lifespan |