I am trying to work out how many cows there are each year of a breeding age.
Now i have something liket this table
YEAR No of C Births BreedP C
No of C births is bsed on gestation periods etc etc, what i wnat to do is say im starting with a population of 100 cows of breeding age i have each year. in the first year 64 cows are born, now for the next year i can expect 128 cows born as my newly born cows wont be of breeding age yet. as we move down through the years in two years time my cows born in year one are going to be old enough.
what formula can i use to work out what my breeding population is for each year ?
cow must be 2 or older and less that 9 years old.
ps i already know the formula for working out the populatioon grow , just need to work out what population to base that on