Question

Using the table for a population answer the following questions. data are for females only.

bg libro xlibro Age (months) Offspring (# per Individual) Proportion surviving to age x Survivorship (individuals) 100000 1000 0 1.0 0 0 200 0 0 0 0.001 0.0001 0.00008 0.00005 0.00001 0 0 0 0 0 800 1 5 0 0

1. what type of survivorship curve do you think these species has (Type I, Type II, or Type III)?  Why?

2. Is this species more likely to be a mouse, a bird or a butterfly?  Why?

Answer 1

a) The survivorship of the species according to the given details is Type III. The graph plotted is concave in Shape. The juveniles with high mortality and low adult mortality.it describes organisms with a high death rate (or low survivorship rate) immediately following birth.

b) no, because marine invertebrates, and most fish have a Type III survivorship curve. In a Type III curve, very few organisms survive their younger years. However, the lucky ones that make it through youth are likely to have pretty long lives after that. Species with this type of curve usually have lots of offspring at once—such as a tree releasing thousands of seeds—but don't provide much care for the offspring.