What does it mean to have a Type 2 survivorship curve?

What does it mean to have a Type 2 survivorship curve?

Type II. Many bird species have a Type II survivorship curve. In a Type II curve, organisms die more or less equally at each age interval. Organisms with this type of survivorship curve may also have relatively few offspring and provide significant parental care.

What organisms are 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 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 is a Type 3 organism?

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.

What animal has 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.

Is Rabbit Type 1 or 2 survivorship?

In between, there are some organisms like birds, mice, rabbits, butterflies, etc. that neither fit the k-, or r-strategist type of survival. They lie in a zone where their chances of survival remain the same throughout their lifespan. Such organisms follow the Type II or B curve of survivorship.

What is a Type 3 survivorship curve?

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.

What is an example of AK selected species?

K-selected species possess relatively stable populations fluctuating near the carrying capacity of the environment. These species are characterized by having only a few offspring but investing high amounts of parental care. Elephants, humans, and bison are all k-selected species.

Are pioneer species R or K-selected?

This indicates that pioneer terrestrial gastropods generally cannot be regarded as r-selected. Pioneer species may possess any of several life history strategies, and the combinations of traits shown by them may have little in common with the r-K selection concept.

What are the 5 different types of organisms?

Living things are divided into five kingdoms: animal, plant, fungi, protist and monera.

What makes an organism a type I Survivor?

Organisms exhibiting a type I survivorship typically produce few offspring and provide good care to the offspring increasing the likelihood of their survival. Humans and most mammals exhibit a type I survivorship curve. Type 2 curve

Which is an example of a type III organism?

Type III organisms typically produce large numbers of offspring, but provide very little or no care for them. Trees and marine invertebrates exhibit a type III survivorship curve because very few of these organisms survive their younger years, but those that do make it to an old age are more likely to survive for a relatively long period of time.

What do you mean by species distribution pattern?

A species distribution pattern is the distribution of individuals within a habitat at a particular point in time—broad categories of patterns are used to describe them. Individuals within a population can be distributed at random, in groups, or equally spaced apart (more or less).

What kind of survivorship curve does a bird have?

Figure 19.4 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.