Cruise 578 REPORT 16.08. - 30.08.2007

(1)

1

Bundesforschungsanstalt für Fischerei

Institut für Seefischerei

Palmaille 9, 22767 Hamburg, D Tel. 040/38905108 D FAX 040/38905 263 D 28.02.2008 D Az.: Pa./v.S./2569

„SOLEA“

Cruise 578 REPORT 16.08. - 30.08.2007

Personnel

Name Institution

Kay Panten SH

Thomas Kehlert ISH Annika Elsheimer ISH

Birger Kreutz Multimar

Julian Brümmer Multimar

Melanie Kruppe ISH

Ole Meyer-Klaeden ISH

Objectives

1. To participate in the ICES co-ordinated “International Beam Trawl Survey” in the North Sea 2. Biological monitoring of the fish fauna in proposed FFH protected areas in the German Bight 3. Distribution of temperature and salinity in the area of investigation

Narrative (Fig. 1)

The port of Cuxhaven was left on 16.8., steaming over night with strong north west wind to the area scheduled for the Beam Trawl Survey west of Jutland, north of the Danish border (ca. 55°N) and subsequently carrying out the work from south to north. In the following days the inshore stations were carried out depends on the weather from north to south. On August 25, the survey was finished and a call to Esbjerg Harbour was used for a staff exchange and the unloading of the aquarium stock

The FFH monitoring started on 27.8., in the sequence “Sylter Außenriff”, “Borkum Riffgrund” and “Dogger Tail End”.

On August 30, the cruise ends in Cuxhaven.

(2)

(3)

3

2°E 3°E 4°E 5°E 6°E 7°E 8°E 9°E

53°N 53.5°N 54°N 54.5°N 55°N 55.5°N 56°N 56.5°N 57°N 57.5°N

58°N F2 F3 F4 F5 F6 F7 F8

44

43

42

41

40

39

38

37

36

35

Dogger Tail End

Sylter Aussenriff

Borkum Riffgrund

Fig. 1: “Solea“, Cruise no. 578 , Haul positions and area of investigation

(4)

Catch composition and length distribution during Beam Trawl Survey

LIMANDA LIMANDA 20%

PLEURONECTES PLATESSA

10%

ASTROPECTEN IRREGULARIS

23%

MICRASTERINA 11%

BUCCINUM UNDATUM 6%

PAGURIDAE 3%

ASTERIAS RUBENS 3%

Other Invertebrates 7%

Invertebrates 52%

RAJA RADIATA 7%

EUTRIGLA GURNARDUS 3%

HIPPOGLOSSOIDES PLATESSOIDES

4%

Other Fish 3%

25%

13%

ASTERIAS RUBENS 12%

MICRASTERINA 10%

ECHINIDAE 4%

PORTUNIDAE 4%

other invertebrates 5%

Invertebrates 48%

CALLIONYMUS LYRA 1%

BUGLOSSIDIUM LUTEUM

1%

EUTRIGLA GURNARDUS 2%

LIMANDA LIMANDA 19%

other fish 4%

Abb. 2: Catch composition in 40-43F4&5 Abb. 3: Catch composition in 40-43F6&7 (offshore) (inshore)

0 20 40 60 80 100 120 140 160 180 200

0 5 10 15 20 25 30 35 40

Length class [cm]

rel. Frequency [‰]

0 20 40 60 80 100 120 140 160 180 200

0 5 10 15 20 25 30 35 40

Abb. 4: Length distribution of Dab in 40-43F4&5 Abb. 5: Length distribution of Dab in 40-43F6&7

0 20 40 60 80 100 120 140 160 180 200

0 5 10 15 20 25 30 35 40 45 50 55 60

0 20 40 60 80 100 120 140 160 180 200

0 5 10 15 20 25 30 35 40 45 50 55 60

Abb. 6: Length distribution of Plaice in 40-43F4&5 Abb. 7: Length distribution of Plaice in 40-43 F6&7

(5)

5

Catch composition and length distribution during FFH Monitoring

1.7%

LIMANDA LIMANDA 0.8%

CALLIONYMUS LYRA 0.3%

ARNOGLOSSUS LATERNA

0.3%

TRIGLA LUCERNA 0.2%

Other Fish 0.6%

ASTERIAS RUBENS 81.7%

PORTUNIDAE 8.0%

Other Invertebrates 6.4%

Invertebrates 96.1%

Abb. 8: Catch composition in FFH-Area „Sylter Aussenriff“

LIMANDA LIMANDA 38%

9%

BUGLOSSIDIUM LUTEUM

4%

MICROSTOMUS KITT 2%

19%

ASTERIAS RUBENS 8%

PAGURIDAE 7%

PORTUNIDAE 3%

BUCCINUM UNDATUM 2%

Invertebrates 41%

Other Fish 6%

Abb. 9: Catch composition in FFH-Area „Dogger Tail End“

25%

BUGLOSSIDIUM LUTEUM

11%

LIMANDA LIMANDA 6%

ARNOGLOSSUS LATERNA

5%

CALLIONYMUS LYRA 4%

ASTERIAS RUBENS 21%

PORTUNIDAE 15%

4%

Invertebrates 45%

Other Fish 5%

Abb. 10: Catch composition in FFH-Area „Borkum Riffgrund“