Table 3 Stunning and killing of carp: Overview of applied stunning methods, electrical parameters, stunning success and time

Stunning procedure no.

Number of fish N total: 113

Water conductivity [μS/cm; MIN-MAX]

Voltage [V; MIN-MAX]

Electrical current densities [A/dm²; MIN-MAX]

Stunning time (min)

[%; (n/total number of fish)]

[%; (n/total number of fish)]

[minutes; minimum - maximum]

[%; (n/total number of fish)]

 1

5

n.a.

n.a.

n.a.

n.a.

80.0 (4/5)

20.0 (1/5)

0.5–2

60.0 (3/5)

 2

2

n.a

n.a

n.a

n.a

100.0 (2/2)

100.0 (2/2)

30

0.0 (0/2)

 3

6

n.a

n.a

n.a

n.a

50.0 (3/6)

0.0 (0/6)

0.5–1

50.0 (3/6)

Summary Percussion

13

n.a

n.a

n.a

n.a

69.2 (9/13)

23.1 (3/13)

0.5–30

46.2 (6/13)

 4

10

453

47

0.0213

6

90.0 (9/10)

0.0 (0/10)

2

90.0 (1/10)

 5

6

337

36

0.0267

2

50.0 (3/6)

50.0 (3/6)

2.5

50.0 (3/6)

 6

10

n.a. (Dry stunning)

n.a.

n.a

1

80.0 (8/10)

10.0 (1/10)

1

20.0 (2/10)

 7

6

398

36

0.0276

1

50.0 (3/6)

0.0 (0/6)

0.5

50.0 (3/6)

Summary Electrical stunning

32

337–1179

36–47

0.0213–0.0276

1–6

71.9 (23/32)

12.5 (4/32)

0.5–2.5

28.1 (9/32)

 8

6

1200

33

0.0759

2

50.0 (3/6)

0.0 (0/6)

0.5–2

66.0 (4/6)

 9

10

441

54

0.0238

5

100.0 (10/10)

20.0 (2/10)

30

0.0 (0/10)

 10

10

526

39

0.0409

0.5

100.0 (10/10)

20.0 (2/10)

1–3

0.0 (0/10)

 11

2

/ (Dry stunning)

/

/

1.5–2

100.0 (2/2)

50.0 (1/2)

1–3

0.0 (0/2)

 12

10

587

38

0.0441

0.5

90.0 (9/10)

0.0 (0/10)

0.5–2

10.0 (1/10)

 13

6

939

33

0.0808

1

100.0 (6/6)

0.0 (0/6)

0.5–1

16.7 (1/6)

 14

6

939

33

0.0808

1

100.0 (6/6)

0.0 (0/6)

2–5

16.7 (1/6)

 15

6

939

33

0.0808

1

100.0 (6/6)

0.0 (0/6)

0.5–1

0.0 (0/6)

 16

6

822

29

0.1464

2

100.0 (6/6)

0.0 (0/6)

0.5–1

0.0 (0/6)

 17

6

/ (Dry stunning)

/

/

1.75

83.3 (5/6)

0.0 (0/6)

2–5

16.7 (1/6)

Summary Electrical stunning followed by percussion

68

441–959

29–54

0.0238–0.1464

0.5–5

92.6 (63/68)

7.4 (5/68)

0.5–30

11.8(8/68)