Week 7- Draft 5

A survivorship curve is a graphical representation of data that is compiled from the life table of a specific population of organisms. There are three different types of survivorship curves. A type 1 survivorship curve describes a species in which newborns and juvenilves will have a high survival rate.Death rates for this curve do not be to increase significantly until old age has been reached. Examples of type 1 survivorship can be seen in the dall mountain sheep. A type 2 surviorship curve deals with a species in which individuals have an approixmately constant chance of surviving from one age to the next throughout their lives. Species that have type 2 survivorship include organisms such as some birds, fish, and mud turtles. Type 3 surviorship curve details a species in which individuals die at a very high rate when they are young, however when they reach adulthood they will most likely survive later in life. This type of survivorship is the most commonly seen type of survivorship in nature and is typical of species that produce large numbers of offspring.