Question

Sampling results for 12 quadrats. Density (individuals/100 cm) Adults Juveniles 1 Quadrat Coordinates 2.8 7,9 7,4 5.9 3,8 1 0
. Use these steps to calculate the population size (N): Calculate the average density per cell (10 cm x 10 cm square). Enter
0 0
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Answer #1
Quadrant Coordinates Adults Juveniles
2,8 1 0
7,9 1 1
7,4 2 14
5,9 0 0
3,8 1 3
2,10 1 0
8,5 0 0
9,8 0 0
4,5 2 5
9,7 0 0
3,1 0 0
7,2 1 1
Average 0.75 2
Estimated Sample Size (N) 0.75 * 100 = 75 2 * 100 = 200
Answer 1 and 2 Adults Juveniles
Percent Error (75-50) / 50*100 (200-250) / 250*100
25 / 5000 -50 / 25000
0.005 -0.002
Answer 3 For adults, estimated population size is HIGHER than actual population size, but percent error is very less For juveniles, estimated population size is LOWER than actual population size, but percent error is very less
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