Unmarked Bean Experiment Lab Report
Introduction:
Capture and recapture is a method to observe animals, give information on survival, recruitment, and size of the population. You capture the animals and mark them and release them. Mark and release repeatedly.
Objective:
The purpose of this experiment was to analyze the amount of marked beans of the beans we would catch.
Hypothesis:
If the number of marked beans represents the number of the mocking jays in the forest and the unmarked beans are the food supply then the mocking jays population would increase because they have so much food.
Materials List:
White Kidney Beans
Paper
Paper Bag
Pencil
Procedure:
Get the bag with beans in it and take it to the table.
Go into the bag and grab a handful.
Count the beans that you
pull out and mark them.
Put them back in the bag.
Grab another handful of beans and count the total.
Count how many marked ones there are.
Record your data.
Data/ Results/ Observations:
MARKED TOTAL # OF BEANS
14 56 192
6 36 288
20 40 96
2 26 624
4 48 576
6 29 232
22 52 113
2 12 288
1 31 1488
10 49 235
9 36 192
Calculations/Analysis:
% Error = number of beans in the bag-average number of beans | x100
= 404 - 370 x 100 404
= 34 x 100 400
= 8.4% error
Conclusion:
At the end of the experiment results were that they had the relations between one another. They were random handfuls of the beans to check the marked ones and the total number of beans. There is no relation between the total and the estimate. The marked beans represent the marked birds and the total amount of beans equals the total amount of birds. When we put the beans back and marked them we had gotten many of the same beans, because there were so many. Our range was 350-500. Our average was 404. Only four trials of ours were “good ranges”, that is 20%. We had enough data recovered to make some good estimates. We repeated the process of capture and recapture to understand ecologists and what they are doing to understand our population.
Capture and recapture is a method to observe animals, give information on survival, recruitment, and size of the population. You capture the animals and mark them and release them. Mark and release repeatedly.
Objective:
The purpose of this experiment was to analyze the amount of marked beans of the beans we would catch.
Hypothesis:
If the number of marked beans represents the number of the mocking jays in the forest and the unmarked beans are the food supply then the mocking jays population would increase because they have so much food.
Materials List:
White Kidney Beans
Paper
Paper Bag
Pencil
Procedure:
Get the bag with beans in it and take it to the table.
Go into the bag and grab a handful.
Count the beans that you
pull out and mark them.
Put them back in the bag.
Grab another handful of beans and count the total.
Count how many marked ones there are.
Record your data.
Data/ Results/ Observations:
MARKED TOTAL # OF BEANS
14 56 192
6 36 288
20 40 96
2 26 624
4 48 576
6 29 232
22 52 113
2 12 288
1 31 1488
10 49 235
9 36 192
Calculations/Analysis:
% Error = number of beans in the bag-average number of beans | x100
= 404 - 370 x 100 404
= 34 x 100 400
= 8.4% error
Conclusion:
At the end of the experiment results were that they had the relations between one another. They were random handfuls of the beans to check the marked ones and the total number of beans. There is no relation between the total and the estimate. The marked beans represent the marked birds and the total amount of beans equals the total amount of birds. When we put the beans back and marked them we had gotten many of the same beans, because there were so many. Our range was 350-500. Our average was 404. Only four trials of ours were “good ranges”, that is 20%. We had enough data recovered to make some good estimates. We repeated the process of capture and recapture to understand ecologists and what they are doing to understand our population.