Do elephants have a Type 1 survivorship curve?

Elephants have a Type I survivorship curve (mortality increases with age), and fecundity decreases with age.

Are frogs Type 1 survivorship curve?

Most frog species display a type III survivorship curve, where the death rate is very high early in life and much lower in the middle and older age groups.

Do rabbits have a Type 1 survivorship curve?

A slightly concave or sigmoid survivorship curve is characteristic of many birds, mice and rabbits. In these animals, the mortality rate is high during the younger stage but becomes lower and almost constant in the adult stage (1 year or older).

Are large mammals Type 1 2 or 3 on the survivorship curve?

There are 3 types of survivorship curves: Type I individuals survive well early in life and generally live many years. At an advanced age, the death rate increases dramatically. Examples include large mammals.

Is Rabbit 3 a survivorship?

Their population mortality is low until they reach the end of their lifespan. The Type III or C curve, is typically followed by r-strategist organisms. They exhibit high mortality at the early stages of their life. … In between, there are some organisms like birds, mice, rabbits, butterflies, etc.

What type of survivorship curve do mice have?

Type II curve
In contrast, the Type II curve considers birds, mice, and other organisms characterized by a relatively constant mortality or survivorship rate throughout their life expectancies.

Are turtles Type 3 survivorship curve?

Survivorship data by general age-class are reviewed for 30 species of turtles representing nine families. Survivorship varies significantly across age-classes, with mortality generally inversely related to age (type III survivorship). … Marine turtles also tend to have the lowest survivorship as adults.

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 organisms have a Type 3 survivorship curve?

The Type III curve, characteristic of small mammals, fishes, and invertebrates, is the opposite: it describes organisms with a high death rate (or low survivorship rate) immediately following birth.

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 does Type 3 survivorship curve mean?

life tables

In survivorship curve. The Type III curve, characteristic of small mammals, fishes, and invertebrates, is the opposite: it describes organisms with a high death rate (or low survivorship rate) immediately following birth.

Why do birds have a Type 2 survivorship curve?

Birds are an example of an intermediate or Type II survivorship curve because birds die more or less equally at each age interval. These organisms also may have relatively few offspring and provide significant parental care.

What are the differences between Type 1 2 and 3 survivorship curves?

Type I curves depict individuals that have a high probability of surviving to adulthood. Type II curves depict individuals whose chance of survival is independent of age. Type III curves depict individuals that mostly die in the early stages of their life.

What type of survivorship is a turtle in?

Turtles typically display a Type III survivorship curve (Pearl 1928), with high juvenile mortality followed by adult age classes with high annual survival (Congdon and Gibbons 1990).

What is AK strategist species?

K-selected species, also called K-strategist, species whose populations fluctuate at or near the carrying capacity (K) of the environment in which they reside. … K-selected species are characterized by long gestation periods lasting several months, slow maturation (and thus extended parental care), and long life spans.

What does it mean to have a Type 1 survivorship curve?

Type I or convex curves are characterized by high age-specific survival probability in early and middle life, followed by a rapid decline in survival in later life. They are typical of species that produce few offspring but care for them well, including humans and many other large mammals.

What does it mean to say that most large mammals have Type 1 survivorship curves?

Survivorship curves show the distribution of individuals in a population according to age. Humans and most mammals have a Type I survivorship curve, because death primarily occurs in the older years. Birds have a Type II survivorship curve, as death at any age is equally probable.

Why do rodents have a Type 2 survivorship curve?

The type II survivorship curve lies in between the type I and types III survivorship curves. This shows the trend that rodents have the average mortality rate regardless of age of rodents. That is, there’s no age-specific death occurs in mouse; it happens at any age.