Institut für Seefischerei

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Institut für Seefischerei

Palmaille 9, 22767 Hamburg Telefon 040 38905-108 Telefax 040 38905-263 25.10.2010 Az.: Pa../v.S./3142

„SOLEA“

REPORT Cruise 626 12.08. - 27.08.2010

Personnel

Name Institution

Kay Panten SF

Thomas Kehlert SF Christine Petersen-Frey SF Christina Breidbach SF

Florian Krau SF

Birger Kreutz Multimar Friedericke Lange SF

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 12.8., steaming over night with good weather conditions to the area scheduled for the Beam Trawl Survey west of Sylt, north of the Danish border (ca.

55°N). On the third day of the survey priority was given to monitoring the FFH area “Dogger

Tail End”. The following days the offshore stations were sampled with different courses depend

on wind direction and wind force. On August 23 the BTS was finished and a gale-force wind

forced the stay in Esbjerg Harbour for two days. With this opportunity the representative of

multimar left the ship with the up to now attained aquarium stock. Back at sea the FFH

monitoring was continued at “Sylter Außenriff”. Due to loss of time “Borkum Riffgrund” can’t

carried out this year. The cruise ended in Cuxhaven in the evening on 26.8.

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Results (Fig. 2 – 7)

A total of 55 half an hour and valid hauls were made using the 7m beam trawl. Additional 20 15min hauls were carried out in the FFH areas. At 61 stations salinity and temperature were measured.

The species composition distribution showed the usual geographic pattern with dab as the most frequent fish, followed by plaice.

Toward the north and the west soon the importance of long rough dab and starry ray in the biomass increases. Still, in the survey area some larger (up to 50 cm) plaice can be found, although quite sporadically.

Also in the FFH areas, nothing unusual was caught. In the Sylt area the common starfish (Asterias rubens) dominates with more than 80% in the catch composition.

Dipl.-Biol. K. Panten

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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 2 1

3 4 5

6 7

8 109 1211 13 14 15

16

17

18 19

20 21

22 24 23 25 26

28 27 29

30 31 3332 3534 37 36

38 39

40

41 42

43 44 4645 47

48

49 50 51

52

53 54

55

56 57 58 59

60 61

62 6364

6665 6867

69 7071 72 73 74

Fig. 1: “Solea“, Cruise no. 626, Haul positions and area of investigation

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Catch composition and length distribution during Beam Trawl Survey

HIPPOGLOSSOIDES PLATESSOIDES

3.46%

MICROSTOMUS KITT 2.05%

GADUS MORHUA 1.40%

EUTRIGLA GURNARDUS

1.21%

Invertebrates 52.52%

ASTERIAS RUBENS 2.94%

APHRODITA ACULEATA

2.43%

ECHINIDAE 1.78%

LUIDIA SARSI 3.39%

EUPAGURUS BERNHARDUS

4.17%

SPATANGUS PURPUREUS

5.18%

NEPTUNEA ANTIQUA 5.49%

PORIFERA 6.04%

BUCCINUM UNDATUM 6.85%

RAJA RADIATA 5.64%

PLEURONECTES PLATESSA

13.68%

LIMANDA LIMANDA 18.25%

ASTROPECTEN IRREGULARIS

7.93%

other Fish 1.80%

LIOCARCINUS HOLSATUS

1.66%

other Invertebrates 4.67%

BUGLOSSIDIUM LUTEUM

0.42%

GADUS MORHUA 0.36%

MERLUCCIUS MERLUCCIUS

0.32%

EUTRIGLA GURNARDUS

0.94%

other Fish 1.89%

23.89%

2.10%

3.24%

SPATANGUS PURPUREUS

4.65%

10.75%

Fig. 2: Catch composition in 39-43F4&5 Fig. 3: Catch composition in 39-43F6&7 (offshore) (inshore)

0 30 60 90 120 150

0 5 10 15 20 25 30 35 40

Length class [cm]

rel. Frequency [%]

0 30 60 90 120 150

0 5 10 15 20 25 30 35 40

Length class [cm]

rel. Frequency [%]

Fig. 4: Length distribution of Dab in 39-43F4&5 Fig. 5: Length distribution of Dab in 39-43F6&7

0 30 60 90 120 150

0 5 10 15 20 25 30 35 40 45 50

Length Class [cm]

rel. Frequency [%]

0 30 60 90 120 150

0 5 10 15 20 25 30 35 40 45 50

Length class [cm ]

rel. Frequncy [%]

Fig. 6: Length distribution of Plaice in 39-43F4&5 Fig. 7: Length distribution of Plaice in 39-43 F6&7

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Catch composition and length distribution during FFH Monitoring

17.25%

1.55%

APHRODITA ACULEATA

1.15%

HOMARUS VULGARIS 1.34%

BUCCINUM UNDATUM

2.61%

3.48%

8.04%

Rest Fisch 3.06%

3.20%

MICROSTOMUS KITT 3.21%

Rest Wirbellose 2.00%

Fig. 8: Catch composition in FFH-Area „Dogger Tail End“

0.69%

0.59%

POMATOSCHISTUS MINUTUS

0.56%

CALLIONYMUS LYRA 0.23%

other Fish 0.44%

9.17%

3.09%

Fig. 9: Catch composition in FFH-Area „Sylter Aussenriff“

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Page 1

CRUISE SUMMARY REPORT

FOR COLLATIMG CENTRE USE

Centre:

DOD

Ref. No.:

Is data exchange restricted Yes In part No SHIP enter the full name and international radio call sign of the ship from which the data were collected, and indicate the type of ship, for example, research ship; ship of opportunity, naval survey vessel; etc.

Name: Solea Call Sign: DBFH Type of ship: FRV

CRUISE NO. / NAME 626

CRUISE PERIOD start 12/08/2010 to 27/08/2010 end

(set sail) day/ month/ year day/ month/ year (return to port)

PORT OF DEPARTURE (enter name and country) Cuxhaven, Germany PORT OF RETURN (enter name and country) Cuxhaven, Germany

RESPONSIBLE LABORATORY enter name and address of the laboratory responsible for coodinating the scientific planning of the cruise

Name: SF (Institut of Sea Fisheries) Address: Palmaille 9, 22767 Hamburg Country: Germany

CHIEF SCIENTIST(S)

enter name and laboratory of the person(s) in charge of the scientific work (chief of mission) during the cruise.

Dipl. Biol. K. Panten

OBJECTIVES AND BRIEF NARRATIVE OF CRUISE enter sufficient information about the purpose and nature of the cruise so as to provide the context in which the report data were collected.

International Beam Trawl Survey

PROJECT (IF APPLICABLE) if the cruise is designated as part of a larger scale cooperative project (or expedition), then enter the name of the project, and of organisation responsible for co-ordinating the project.

Project name: International Beam Trawl Survey

enter the unique number, name

or acronym assigned to the cruise

(or cruise leg, if appropriate).

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Page 2 PRINCIPAL INVESTIGATORS: Enter the name and address of the Principal Investigators responsible for the data collected on the cruise and who may be contacted for furtherinformation about the data. (The letter assigned below against each Principal Investigator is used on pages 2 and 3, under the column heading ‘PI‘, to identify the data sets for which he/she is responsible)

A. Dipl. Biol. K. Panten B.

C.

D.

E.

F. MOORINGS, BOTTOM MOUNTED GEAR AND DRIFTING SYSTEMS

This section should be used for reporting moorings, bottom mounted gear and drifting systems (both surface and deep) deployed and/or recovered during the cruise.

Separate entries should be made for each location (only deployment positions need be given for drifting systems). This section may also be used to report data collected at fixed locations which are returned to routinely in order to construct ‘long time series‘.

PI See top of page.

APPROXIMATE POSITION DATA

TYPE enter code(s) from list on

cover page.

DESCRIPTION

LATITUDE LONGITUDE Identify, as appropriate, the nature of the instrumentation the parameters (to be) measured, the number of instruments and their depths, whether deployed and/or recovered, dates of deployments and/or recovery, and any identifiers given to the site.

deg min N/S deg min E/W

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Page 3

SUMMARY OF MEASUREMENTS AND SAMPLES TAKEN

Except for the data already described on page 2 under ‘Moorings, Bottom Mounted Gear and Drifting Systems‘, this section should include a summary of all data collected on the cruise, whether they be measurements (e.g. temperature, salinity values) or samples (e.g. cores, net hauls).

Separate entries should be made for each distinct and coherent set of measurements or samples. Different modes of data collection (e.g. vertical profiles as opposed to underway measurements) should be clearly distinguished, as should measurements/sampling techniques that imply distinctly different accuracy’s or spatial/temporal resolutions. Thus, for example, separate entries would be created for i) BT drops, ii) water bottle stations, iii) CTD casts, iv) towed CTD, v) towed undulating CTD profiler, vi) surface water intake measurements, etc.

Each data set entry should start on a new line – it’s description may extend over several lines if necessary.

NO, UNITS : for each data set, enter the estimated amount of data collected expressed in terms of the number of ‘stations‘; miles‘ of track; ’days‘ of recording; ‘cores‘ taken; net ‘hauls‘; balloon ‘ascents‘; or whatever unit is most appropriate to the data. The amount should be entered under ‘NO‘ and the counting unit should be identified in plain text under ‘UNITS‘.

PI see page

2 NO see above

UNITS see above

DATA TYPE Enter code(s) from list on cover

page

DESCRIPTION

Identify, as appropriate, the nature of the data and of the instrumentation/sampling gear and list the parameters measured. Include any supplementary information that may be appropriate, e. g. vertical or horizontal profiles, depth horizons, continuous recording or discrete samples, etc. For samples taken for later analysis on shore, an indication should be given of the type of analysis planned, i.e. the purpose for which the samples were taken.

A 75 Hauls B18 Beam Trawl

A 75 Hauls B19 Beam Trawl

A 61 Stations H10 T-S-Sond profile

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Page 4

TRACK CHART: You are strongly encouraged to submit, with the completed report, an annotated track chart illustrating the route followed and the points where measurements were taken.

Insert a tick(  ) in this box if a track chart is supplied

GENERAL OCEAN AREA(S): Enter the names of the oceans and/or seas in which data were collected during the cruise – please use commonly recognised names (see, for example, International Hydrographic Bureau Special Publication No. 23, ‘Limits of Oceans and Seas‘).

Institut für Seefischerei