{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Population Growth

# Population Growth - interval = Births during time interval...

This preview shows pages 1–3. Sign up to view the full content.

1/31/11 Population Growth Consider a single bacteria Divides every 20 minutes under ideal conditions So in 20 minutes 2 bacteria, 40 min. 4 bact, 80 min. 8 In 36 hours there would be a layer of bacteria 1 foot deep over the entire Earth Consider Elephants Produce 6 young in 100 years 1 pair of elephants could produce 19 million in only 750 years Why aren’t there more Elephants?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
1/31/11 Population Growth Models: Exponential Growth Population under ideal conditions (no limited resources) What we want to see is how the population size changes from 1 year to the next. OR change in population size during some time
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: interval = Births during time interval – Deaths during time interval • Now mathematically – N = population size – t = time period – B = # of births 1/31/11 Population Growth Models: Exponential Growth • We can rewrite the equation: – ∆Ν/∆τ = Β-D • Take B (average births) and convert it to the birth rate (avg. # of offspring produced per individual in population) – Example: population of 1000 individuals has 34 births in one year, then the birth rate is • 0.034 • Do the same thing with D (average...
View Full Document

{[ snackBarMessage ]}

### Page1 / 3

Population Growth - interval = Births during time interval...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online