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Table 2 Harbour porpoise sightings in 2002–2004

From: A recovery of harbour porpoises (Phocoena phocoena) in the southern North Sea? A case study off Eastern Frisia, Germany

Date

Altitude (m)

km on effort

S

I

Calves

12/13/02

183

425

1

1

 

02/17/03

183

431

24

33

 

04/24/03

183

363

1

1

 

05/07/03

183

411

11

14

 

06/07/03

183

446

16

20

2

07/10/03

183

381

26

28

1

07/21/03

76

440

5

7

 

08/04/03

183

366

2

3

1

08/10/03

76

452

7

7

 

09/20/03

76

486

5

5

 

10/02/03

76

453

8

9

 

10/16/03

183

413

5

5

 

11/28/03

76

488

5

5

 

12/09/03

76

502

7

9

 

02/16/04

183

502

27

37

 

02/16/04

76

502

26

28

 

03/03/04

76

445

39

42

 

03/18/04

76

503

22

23

 

04/14/04

76

378

30

34

 

05/03/04

183

454

50

53

 

05/28/04

76

502

19

19

 

06/02/04

76

502

4

4

 

06/03/04

183

478

2

2

 

07/21/04

76

487

13

16

2

07/22/04

183

413

16

21

2

Sum

 

11,223

371

426

8

  1. km on effort valid effort on both sides, S number of sightings, I number of individuals