Population problem - biology?
In a study, 5000 flies were captured and marked with a powder and released.
The next day, 515 flies were captured and 21 of them had marks
how many flies are in the population?
I don't know how to do it. Does it have to do with percentage?
- 10 years agoFavorite Answer
N = Estimate of total population size
M = Total number of animals captured and marked on the first visit
C = Total number of animals captured on the second visit
R = Number of animals captured on the first visit that were then recaptured on the second visit
so, in your case
Easy math gives you
N=122,619 flies in that population
- Asst ProfLv 710 years ago
Yes. Set up equivalent proportions for the size of the population / number marked:
515 in captured population / 21 marked = x in total population / 5000 marked. Then just solve for x → (5000/21) x 515 = x =122,619.Source(s): Forty years teaching Biology, currently teaching College Math Refresher course