Grade 12 Ecology & populations worksheet

What is on the worksheet

1. Supplied fictional records give M = 57 initially marked, C = 23 in a later sample, and R = 9 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

2. Supplied fictional records give M = 53 initially marked, C = 42 in a later sample, and R = 23 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

3. A fictional population starts at 261. During one interval: 44 births, 21 arrivals, 30 deaths and 3 departures. Find the final count. Round to 3 decimal places if needed.

4. A fictional population starts at 410. During one interval: 44 births, 35 arrivals, 55 deaths and 1 departures. Find the final count. Round to 3 decimal places if needed.

5. Supplied fictional records give M = 59 initially marked, C = 73 in a later sample, and R = 53 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

6. A fictional population starts at 254. During one interval: 10 births, 5 arrivals, 49 deaths and 7 departures. Find the final count. Round to 3 decimal places if needed.

7. A fictional population starts at 576. During one interval: 28 births, 24 arrivals, 12 deaths and 22 departures. Find the final count. Round to 3 decimal places if needed.

8. A fictional population starts at 111. During one interval: 33 births, 33 arrivals, 50 deaths and 4 departures. Find the final count. Round to 3 decimal places if needed.

9. A fictional population starts at 860. During one interval: 25 births, 36 arrivals, 21 deaths and 20 departures. Find the final count. Round to 3 decimal places if needed.

10. A fictional population starts at 719. During one interval: 25 births, 20 arrivals, 10 deaths and 1 departures. Find the final count. Round to 3 decimal places if needed.

11. Supplied fictional records give M = 56 initially marked, C = 38 in a later sample, and R = 23 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

12. Supplied fictional records give M = 87 initially marked, C = 67 in a later sample, and R = 40 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

13. A fictional population starts at 286. During one interval: 77 births, 34 arrivals, 48 deaths and 18 departures. Find the final count. Round to 3 decimal places if needed.

14. A fictional population starts at 494. During one interval: 28 births, 20 arrivals, 23 deaths and 15 departures. Find the final count. Round to 3 decimal places if needed.

15. Supplied fictional records give M = 27 initially marked, C = 81 in a later sample, and R = 26 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

16. Supplied fictional records give M = 60 initially marked, C = 79 in a later sample, and R = 59 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

17. Supplied fictional records give M = 58 initially marked, C = 87 in a later sample, and R = 38 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

18. A fictional population starts at 495. During one interval: 33 births, 16 arrivals, 10 deaths and 17 departures. Find the final count. Round to 3 decimal places if needed.

19. Supplied fictional records give M = 44 initially marked, C = 54 in a later sample, and R = 12 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

20. A fictional population starts at 524. During one interval: 16 births, 33 arrivals, 8 deaths and 16 departures. Find the final count. Round to 3 decimal places if needed.