1. Pots / Traps / Baskets Catch Sampling
Drawing:
Photo:

2. Data collection priorities
Estimate effort and total catch for each gear deployment;
Identify every individual caught on each randomly selected set (or subsample within the set) and estimate percent retained;
Collect biological information on target and other species as requested;
Record all sightings and interactions with marine mammals and sea turtles;
Record vessel and fishing gear characteristics.

3. Objectives X
Demonstrate your ability to sample and complete the Catch Composition form

4. Defining a set
Longline of baskets – total baskets connected by one line
Deployed individually – coordinate w/ Captain
1 set of 18
3 sets of 6
6 sets of 3
◘ ◘ ◘ ◘ ◘ ◘

5. Choosing a set to sample
Same general rules as for demersal longline
Use random sample table if necessary

6. Choosing pots (baskets) to sample
Population: all baskets in 1 set
Sampling unit: single basket
Decide on how much to sample (e.g. 1/3 of baskets) – spatial sample frame
Choose sample method - random or systematic random
Select random numbers
Count/weigh everything from baskets sampled
◘ ◘ ◘ ◘ ◘ ◘

7. Catch Composition Form

10. Catch Composition Form
Weights
Actual
Average weight * total count
Estimate

13. Activity
Questions on catch composition sampling / random sampling or the form?
Activity #2
Groups of 2
Sample 20% (Systematic or Random)
Describe how you selected pots
Tally sample & complete Catch Comp form

14. Tally Sampling Activity
Key to “symbols”
Shark
Purple body
Stingray
Redfish
Flatfish
Octopus
Snail
Starfish 14

15. Pot #1
1 Shark
3 Snail 8 9 2 7 3 4 6 5 1 10

16. Pot #2
2 Purple body
6 Starfish 8 9 2 7 3 4 6 5 1 10

17. Pot #3
EMPTY 8 9 2 7 3 4 6 5 1 10

18. Pot #4
7 Octopus
17 Snail
1 Starfish 8 9 2 7 3 4 6 5 1 10

19. Pot #5
18 Snail 8 9 2 7 3 4 6 5 1 10

20. Pot #6
5 Redfish
2 Flatfish
2 Starfish 8 9 2 7 3 4 6 5 1 10

21. Pot #7
4 Shark
1 Stingray
2 Starfish 8 9 2 7 3 4 6 5 1 10

22. Pot #8
1 Shark
3 Flatfish
1 Octopus 8 9 2 7 3 4 6 5 1 10

23. Pot #9
EMPTY 8 9 2 7 3 4 6 5 1 10

24. Pot #10
1 Shark
1 Snail 8 9 2 7 3 4 6 5 1 10

25. Pot #11
2 Flatfish
5 Starfish 8 9 2 7 3 4 6 5 1 10

26. Pot #12
8 Starfish 8 9 2 7 3 4 6 5 1 10

27. Pot #13
1 Stingray
2 Starfish 8 9 2 7 3 4 6 5 1 10

28. Pot #14
1 Purple body
2 Snail 8 9 2 7 3 4 6 5 1 10

29. Pot #15
EMPTY 8 9 2 7 3 4 6 5 1 10

30. Pot #16
EMPTY 8 9 2 7 3 4 6 5 1 10

31. Pot #17
1 Shark
2 Flatfish
17 Snail
1 Starfish 8 9 2 7 3 4 6 5 1 10

32. Pot #18
2 Redfish
1 Octopus 8 9 2 7 3 4 6 5 1 10

33. Pot #19
1 Stingray
1 Redfish
4 Starfish 8 9 2 7 3 4 6 5 1 10

34. Pot #20
2 Shark
7 Starfish 8 9 2 7 3 4 6 5 1 10

35. Pot #21
4 Octopus
3 Snail 8 9 2 7 3 4 6 5 1 10

36. Pot #22
EMPTY 8 9 2 7 3 4 6 5 1 10

37. Pot #23
1 Purple body
4 Snail 8 9 2 7 3 4 6 5 1 10

38. Pot #24
1 Shark
1 Redfish
4 Starfish 8 9 2 7 3 4 6 5 1 10

39. Pot #25
1 Shark
8 Snail 8 9 2 7 3 4 6 5 1 10

40. Pot #26
2 Purple body
1 Starfish 8 9 2 7 3 4 6 5 1 10

41. Pot #27
EMPTY 8 9 2 7 3 4 6 5 1 10

42. Pot #28
2 Octopus
11 Snail
1 Starfish 8 9 2 7 3 4 6 5 1 10

43. Pot #29
12 Snail 8 9 2 7 3 4 6 5 1 10

44. Pot #30
4 Redfish
1 Flatfish
2 Starfish 8 9 2 7 3 4 6 5 1 10

45. Pot #31
4 Shark
1 Stingray
1 Starfish 8 9 2 7 3 4 6 5 1 10

46. Pot #32
1 Shark
1 Flatfish
5 Octopus 8 9 2 7 3 4 6 5 1 10

47. Pot #33
EMPTY 8 9 2 7 3 4 6 5 1 10

48. Pot #34
1 Shark
1 Snail 8 9 2 7 3 4 6 5 1 10

49. Pot #35
3 Flatfish
5 Starfish 8 9 2 7 3 4 6 5 1 10

50. Pot #36
7 Starfish 8 9 2 7 3 4 6 5 1 10

51. Pot #37
2 Stingray
3 Starfish 8 9 2 7 3 4 6 5 1 10

52. Pot #38
1 Purple body
2 Snail 8 9 2 7 3 4 6 5 1 10

53. Pot #39
EMPTY 8 9 2 7 3 4 6 5 1 10

54. Pot #40
EMPTY 8 9 2 7 3 4 6 5 1 10

55. Pot #41
4 Shark
1 Flatfish
13 Snail
1Starfish 8 9 2 7 3 4 6 5 1 10

56. Pot #42
2 Redfish
3 Octopus 8 9 2 7 3 4 6 5 1 10

57. Pot #43
1 Stingray
1 Redfish
1 Starfish 8 9 2 7 3 4 6 5 1 10

58. Pot #44
2 Shark
1 Starfish 8 9 2 7 3 4 6 5 1 10

59. Pot #45
4 Octopus
3 Snail 8 9 2 7 3 4 6 5 1 10

60. Pot #46
EMPTY 8 9 2 7 3 4 6 5 1 10

61. Pot #47
1 Purple body
7 Snail 8 9 2 7 3 4 6 5 1 10

62. Pot #48
1 Shark
2 Redfish
7 Starfish 8 9 2 7 3 4 6 5 1 10

64. References
Hanrahan, J., D. J. Melindy, and J. V. Pelrine At-sea Observer Program Operations Manual: A Training Aid and Field Reference. National At-sea Fisheries Observer Program, Department of Fisheries and Oceans, Ottawa, Canada.
Slack-Smith, R. J Fishing with traps and pots. FAO Training Series No. 26, FAO, Rome.
Watson, R., E. Hoshino, J. Beblow, C. Revenga, Y. Kura, and A. Kitchingman Fishing Gear Associated With Global Marine Catches. Fisheries Centre Research Reports 12.

65. Large traditional potters for fishing spiny lobster off Mauritania -
Courtesy of Joël Prado - FAO/FIIT