Question

use the graphs to answer the question. sources of mortality by predator: a: control site reptile (rattlesnake) 8% bird or mammal 24.3% mammals 54.1% birds 13.5% b: test sites burmese python 77% bird or mammal 14% mammals 4.5% birds 4.5% for each graph, what was the total percentage of rabbits killed by birds or mammals? at the control and test sites, 18% of rabbits were killed by birds and 58.6% of rabbits were killed by mammals. at the control site, 67.6% of the rabbits were killed by birds or mammals; at the test sites, only 9% were killed by birds or mammals. at the control site, 24.3% of the rabbits were killed by birds or mammals; at the test sites, only 14% were killed by birds or mammals. at the control site, 91.9% of the rabbits were killed by birds or mammals; at the test sites, only 23% were killed by birds or mammals.

Explanation:

Step1: Calculate for control site

Add the percentage of rabbits killed by birds and mammals at control site. Birds: 13.5%, Mammals: 54.1%, and Bird or mammal: 24.3%. Total for birds or mammals at control site is \(24.3\%+ 43.3\%=67.6\%\) (since \(24.3\%\) already includes some overlap and adding the non - overlapping parts \(13.5 + 54.1=67.6\)).

Step2: Calculate for test site

Add the percentage of rabbits killed by birds and mammals at test site. Birds: 4.5%, Mammals: 4.5%, and Bird or mammal: 14%. Total for birds or mammals at test site is \(14\%+(4.5\% + 4.5\%-x)\) (where \(x\) is the overlap in the 14% but since we are just adding the given values for simplicity) \(=14\% + 0=14\%\) (in a non - overlapping sense considering the given data), or simply using the given "Bird or mammal" value of 14% which is the combined value. But if we calculate from individual parts \(4.5+4.5 = 9\%\) (assuming no double - counting in the "Bird or mammal" category). Here we use the sum of individual parts for a more accurate non - overlapping calculation. So total for test site is \(9\%\).

Answer:

At the control site, 67.6% of the rabbits were killed by birds or mammals; at the test sites, only 9% were killed by birds or mammals.