Note importing a graph using a windows word processor is just a matter of pressing <PrintScreen> in the DOS application and the Paste button in the word processor- i.e. very easy!
Here's how: Set R = 100
PopMax = 500 and Y=5
now change B until R = 200 after one year.
(The blank lines in this writeup are for your help. You will actually hand in a separate report with all these numerical questions answered as well as complete sentence answers for your comments. Moreover, you will import the required graphs into your report.)
Now find the value of D, the fox death rate, for the fox population to decrease to 50% of its value in one year?
Set F=200 and find the D value that give F=100 after one year.
D= ____________________________
Is this like B ? _________________________
Is this like B?____________________________________________________
Find D for a 50% decrease in 2 years?_______________________________
How does this relate to LOG(2) ____________________________________
A is the negative affect of the foxes on the rabbits and also the positive affect of the rabbits on the foxes. (Well fed foxes have more kits that live!)
Estimate the value of the MAXIMUM NUMBER OF RABBITS for each value of
F.
25________, 50________, 100________, 150________, and 200__________
Estimate the value of the MINIMUM NUMBER OF RABBITS for each value of F
Min number of Rabbits :
25________, 50________, 100________, 150________, and 200__________
Compute the RABBIT QUALITY OF LIFE (Min/Max*100):
25________, 50________, 100________, 150________, and 200__________
What starting number of foxes maximizes the rabbit quality of life (A=.003) ? ___________
Foxes | 25 | 50 | 100 | 150 | 200 |
Rabbit Max | |||||
Rabbit Min | |||||
Rabbit Quality of Life |
Foxes | 25 | 50 | 100 | 150 | 200 |
Rabbit Max | |||||
Rabbit Min | |||||
Rabbit Quality of Life |
Trial | A (Interaction Const) | Starting Foxes for Best Quality of Life |
1 | ||
2 | ||
3 |
(Quality of life may be considered less brother and sisters eaten in a given period.) This is trial and error work and may take quite a few trials.
This page is Copyright 1998 by J. Barry DeRoos. All Rights Reserved.
This page may be distributed and used freely, provided that the
copyright notices remain intact.
Last Modified: Jan , 2002.