Table of Contents
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 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 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. In contrast, the Type II curve considers birds, mice, and other organisms characterized by a relatively constantu2026
Why do people have type1 survivorship?
Humans and most primates exhibit a Type I survivorship curve because a high percentage of offspring survive their early and middle yearsu2014death occurs predominantly in older individuals.
What animal has a Type 2 survivorship curve?
any age, shown by the Type II survivorship curve, is evident as a straight line with a constant slope that decreases over time toward zero. Certain lizards, perching birds, and rodents exhibit this type of survivorship curve.
What do you mean by survivorship curve?
survivorship curve, graphic representation of the number of individuals in a population that can be expected to survive to any specific age.
What is a Type I survivorship curve quizlet?
type I survivorship curve. describes species in which most individuals survive to middle age and then after that, mortality is higher. ( humans, elephants, most big animals ) type II survivorship curve. organisms in which the length of survivorship is random; they are just as likely to die at any age.
What organisms have a Type 1 survivorship curve?
Examples. Examples of populations with Type I survivorship include humans in developed countries and animals in zoos. A lot of effort is invested in each individual, resulting in high survivorship throughout the life cycle: Most individuals die of old age.
Do elephants have a Type 1 survivorship curve?
Elephants have a Type I survivorship curve (mortality increases with age), and fecundity decreases with age.
Do birds have a Type 1 survivorship curve?
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.
Do birds have a Type III survivorship curve?
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 3 survivorship curve?
Elephants have a Type I survivorship curve (mortality increases with age), and fecundity decreases with age.
What survivorship curve are rabbits?
Such organisms follow the Type II or B curve of survivorship. Within these, there are some organisms (like butterflies and other insects) that lean more towards the A curve, and therefore follow a B1 curve. Likewise, organisms (like rabbits, mice) that lean more towards the C curve, are said to be following a B2 curve
What is a Type 3 survivorship?
In type III survivorship curves, early ages experience the highest mortality with much lower mortality rates for organisms that make it to advanced years. Type III organisms typically produce large numbers of offspring, but provide very little or no care for them.
What does it mean for a population 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.
Why do humans and other mammals tend to have a Type 1 survivorship?
Humans and most primates exhibit a Type I survivorship curve because a high percentage of offspring survive their early and middle yearsu2014death occurs predominantly in older individuals.
What type of survivorship curve Do humans have Why?
The survival curve of modern humans is described as a classic u201cType-Iu201d, where the probability of survival is high until relative old age, whereby it then declines rapidly, which is typical of many large mammals.
What is a Type 1 survivorship?
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 a Type 2 survivorship curve?
A type II survivorship curve shows a roughly constant mortality rate for the species through its entire life. This means that the individual’s chance of dying is independent of their age. Type II survivorship curves are plotted as a diagonal line going downward on a graph.
Do rabbits have a Type 2 survivorship curve?
Such organisms follow the Type II or B curve of survivorship. Within these, there are some organisms (like butterflies and other insects) that lean more towards the A curve, and therefore follow a B1 curve. Likewise, organisms (like rabbits, mice) that lean more towards the C curve, are said to be following a B2 curve
Is fish Type 2 survivorship?
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. Type III. Trees, marine invertebrates, and most fish have a Type III survivorship curve
What animal has a Type 1 survivorship curve?
Elephants have a Type I survivorship curve (mortality increases with age), and fecundity decreases with age.
What does Type 3 survivorship curve mean?
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 a Type 3 survivorship curve?
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.
Which sentences describe a survivorship curve?
Which sentences describe a survivorship curve? It shows the number of individuals living at each age interval plotted versus time. It divides only one organism’s population into age groups to show how long the members of each age group will live. It helps to compare life histories of different populations.
