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ANNEXES


ANNEX I Equipment and methods
ANNEX II Records of Fishing Operations
ANNEX III Results from the Length Measurements
ANNEX IV Length Frequency Distributions (raw data)
ANNEX V List of Species caught off West Africa from Agadir to Ghana, with reference to station numbers where caught and to catch/hour (in brackets).
ANNEX VI Further Catch Data by Region and Survey

ANNEX I Equipment and methods

Vessel and equipment

The R/V "Dr. Fridtjof Nansen" is a 150 foot stern trawler with a main engine of 1500 horsepower. The vessel is equipped for acoustic surveying, bottom and midwater trawling, hydrographic and plankton observations, and has a satellite navigator for precise positioning.

The bottom trawl was a 134 foot headline shrimp trawl adapted for demersal fish trawling. The foot rope was equipped with 0.5 m rubber bobbins. Bridles of 40 m gave it a horizontal distance between the wings of about 25 m. The effective vertical opening of the net was about 6 m. The pelagic trawl was about 120 m in circumference, and the vertical opening was normally 13 m. The pelagic trawl had an inner-net of 1 cm mesh-size in the cod end. Pelagic trawl operations were usually monitored with aid of a 50 kHz acoustic net sonde.

Hydrographic observations were carried out with Nansen bottles with which temperature readings and samples for salinity and oxygen determinations were collected at standard depths. The salinity was determined with an inductive salinometer and dissolved oxygen by the Winkler method.

Two Simrad EK Sounders, 120 kHz and 38 kHz, connected to QM integrators, were run continuously. Settings and performance of the two acoustic systems were:

Basic range

120 kHz*

3-8 kHz


0 - 100 m

0 - 100 m or 0 - 250 m**

Transmitter

1/1

Ext. (2500 W NOM)

Transducer (ceramic)

10% (circular)

8° x 8°

SL + VR


139 dB (13.9.81)

Bandwith and pulse length

3 kHz, 0.6 m/sec

3 kHz, 0.6 m/sec

TVG and gain

20 logR, -0dB

20 logR, -20 dB

Recorder gain

3-5

7

Integrator threshold

0.5 - 0.8

0.5 - 0.8

Integrator gain

10 dB (x10)

20 dB (x 10)

Depth intervals

According to recordings

According to recordings

* The integrator was not coupled to the 120 kHz system during the May - June surveys.
** The depth monitored could be doubled with the aid of a slave recorder.
The 38 kHz system coupled to the integrator was used for abundance estimation of fish, while the 120 kHz system was used as an aid during the daily analysis of the echo recordings.

All data concerning survey routes, station work, catch, and the judged acoustic data are logged onto an onboard computer terminal (type Texas Instruments TI 771) and stored on floppy disks. The data are later transferred to a main computer for sorting and further processing.

Sampling and processing of catch data

For each trawl catch the weight and number of each species were estimated by sampling. Species determination was mainly based on FISHER et al. (1981) and partly on BLANCHE et al. (1970). Length measurements were frequently taken of the commercially important species. During the June survey a special study was carried out on the trigger fish (Balistes capriscus) where length/ weight relations and degree of maturation were recorded.

The catches and their main composition are listed in Annex II and main results from the length measurements are given in Annex III.

In connection with the data logging system mentioned above an 7-character alphanumeric species code was developed. This code contains information on the family and genus to which a species belongs and thus faciliates processing of catch data on different levels.

The echo recordings and their interpretation

Assessment of the abundance of fish resources, based on acoustic observations combined with experimental fishing, is a method which especially lends itself to fish found in schools or other aggregations in midwater. This is, moreover, a behaviour typical for some of the fish species found in West African waters. But there are also notable exceptions, e.g. surface schooling tunas and tuna-like species and strictly bottom dwelling fish such as rays and flounders. Any fish within ½-1 m of the bottom or in the very surface layer will escape echo sounder detection. For navigational reasons the work with the R/V "Dr. Fridtjof Nansen" is limited to waters deeper than about 10 m. The extreme inshore waters could thus not be covered.

Because of dissimilarities in behaviour and size, different species or groups of fish species may give rise to different types of echo-recordings. Small-sized pelagic fish are, for instance, often found in well-defined schools, the recordings of which can be distinguished from those of the often looser aggregation in which semi-demersal larger fish are frequently found. Such classification of the echo recordings is of considerable assistance in interpreting the acoustic observations, but a positive identification by fishing operations is still indispensable and also provides the only means of sampling fish in this type of combined survey.

Based on previous experience and on identification by fishing, the echo recordings in the surveyed waters were grouped in the following five categories:

Category

Type

Common feature in traces

I

Plankton and juvenile fish

Mostly distributed in scattered layer in upper water. Dusty, fine-grained appearance

II

Clupeids and anchovies (Pelagic 1)

Recordings of true larger schools or dense layer mostly in upper water. Distinct single fish traces when scattered

III

Horse-mackerels and scads (Pelagic 2)


IV

Trigger fish

Dense to scattered layers mostly in upper water. Distinct single fish traces

V

Other fish (Croakers, grunts, sparids, snappers, sharks etc.

Looser aggregations of smaller and larger fish near bottom


Acoustic abundance estimation

Average integrator deflection per nautical mile was calculated every fifth nautical mile steamed. All echo traces were evaluated daily and combined with the information from the trawl catches. The readings from the integrator were split in the five categories given above.

The integrator deflection was classified into three levels: a) scattered (1-9 mm), b) slightly gathered (10-19 mm) and c) dense (>20 mm). Contour lines were drawn to distinguish between areas of different fish density. This forms the basis for the preparation of charts of fish distributions presented in this report. For each of the areas the mean integrator value and the areas size were calculated and their product gives an index of abundance for that area.

The conversion factor C, used to transform the index of abundance to absolute abundance, was chosen on the basis of information on target strength of fish in the NE Atlantic. C is linearily dependent upon the length of the fish, and we can correct for this by multiplying the index of abundance with a length-correction f, where (L = fish length) . After summing up all indices of abundance within a region the length-corrected indices are converted into fish biomass by multiplying with the C value for the fish of standard length 17 cm.

The reason for this procedure is to make it easier to recalculate the biomass figures when better data on target strength is available.

For the 38 kHz system with its standard settings, C17 = 13.6 tonnes/nm2 /mm/nm. This corresponds to an average target strength of -34.3 dB/kg, derived from the equation TS = -10 logL -22/dB/kg (Aglen et al. 1982).

ANNEX II Records of Fishing Operations

II a

II b

II c

II d

II e

II f

II g

II h

II i

II j

II k

II l

II m

II n

II o

II p

II q

II r

II s

II t

II u

II v

II w

II x

ANNEX III Results from the Length Measurements

FAMILY/SPECIES


STATION


LENGTHS IN SAMPLE





LOWEST

HIGHEST

MEAN

ST. DEV.

N

ACANTHURIDAE

ACA







Acanthurus monroviae

ACAACO 1









297

21.0

36.0

28.7

4.2

14

APOGONIDAE

APO







Synaqrops microlepis

APOSYO 1









33

3.5

7.5

5.1

.8

97



38

5.5

11.5

7.9

1.7

92

ARIIDAE

ARD







Arius heudeloti

ARDARO 1









281

6.0

35.0

15.5

9.6

20

ARIOMMIDAE

ARM









129

11.0

17.0

14.2

1.7

46



139

13.0

17.0

14.8

1.0

51



155

10.0

17.0

14.0

1.5

121



158

13.5

17.0

15.6

.7

57



161

12.0

17.5

14.1

1.1

70



165

10.0

20.5

14.9

1.3

57



166

13.5

19.5

15.5

1.2

50



176

9.0

18.0

13.1

1.9

252



197

8.0

15.0

10.8

1.9

99



277

14.0

17.0

15.5

.8

13



342

7.0

15.0

11.1

1.6

89

BALISTIDAE

BAL







Balistes capriscus

BALBAO 1









55

7.0

9.0

8.0

.6

17



57

18.5

24.5

20.1

1.0

86



60

17.0

23.5

19.8

1.0

50



66

17.0

21.0

16.1

1.0

18



68

16.5

21.0

18.2

1.3

12



71

16.0

21.0

17.4

1.3

40



72

16.0

20.0

17.6

.9

61



75

16.0

22.5

17.3

1.2

52



76

15.5

20.0

16.8

.9

63



78

16.0

20.5

17.7

1.2

54



79

17.0

20.5

18.8

.9

47



80

17.0

20.5

18.5

.7

50



81

16.5

19.5

17.4

.7

96



83

15.5

28.5

20.2

2.7

58



85

16.0

20.0

17.5

.8

71



87

16.0

20.0

17.3

.8

65



88

17.5

22.5

19.2

1.1

50



90

15.0

27.5

20.6

2.4

63



92

16.0

23.5

17.6

1.6

46



93

16.0

19.5

17.2

.7

57



95

17.0

24.0

18.7

1.7

54



109

17.0

22.5

19.8

1.2

49



112

17.0

23.0

20.4

1.5

42



119

17.5

24.0

20.6

1.4

31



121

17.0

20.0

18.5

.8

22



123

17.0

19.0

18.1

.7

8



124

16.5

22.0

18.8

1.0

50



125

17.0

21.5

19.0

1.1

163



131

15.5

21.5

18.5

1.1

131



134

17.5

28.5

19.8

1.6

157



136

15.0

24.0

17.4

1.0

169



138

14.5

19.5

16.8

1.1

61



171

14.5

20.0

16.6

.9

253



173

15.0

20.0

16.5

.8

256



176

12.0

20.0

15.4

1.1

242



177

12.0

17.5

15.4

1.0

42



178

11.5

17.5

14.8

1.0

350



182

12.0

17.0

14.7

.9

324



184

13.5

23.5

14.9

.9

329



185

12.0

15.5

14.0

.8

133



187

13.0

17.0

14.5

.8

53



188

12.0

22.0

14.6

.8

330



189

12.5

18.0

14.9

.9

170



191

12.5

18.0

14.5

.7

201



193

12.5

21.0

15.2

1.3

134



195

12.5

21.5

15.5

1.7

99



197

12.0

21.0

16.9

2.2

98



198

12.0

19.0

14.7

.9

355



199

12.0

17.5

14.4

.8

100



200

12.0

17.0

14.0

.9

102



268

16.0

19.0

17.4

.8

64



269

15.0

19.0

17.1

.7

99



270

16.0

36.0

19.3

2.7

106



272

17.0

22.0

19.0

1.2

50



273

16.0

25.0

18.8

1.8

43



274

16.0

22.0

18.3

1.2

75



275

16.0

21.0

18.4

1.4

31



276

16.0

22.0

18.5

1.2

64



277

18.0

22.0

20.2

1.0

53



289

18.0

25.0

20.8

1.5

66



295

19.0

23.0

20.7

.9

99



297

24.0

29.0

25.6

1.6

12



299

20.0

33.0

24.1

2.9

29



300

19.0

23.0

20.8

1.1

33



305

24.0

27.0

25.6

.8

16



307

18.0

26.0

21.1

.4

68



308

22.0

29.0

25.3

.7

19



309

22.0

29.0

24.2

.9

35



319

20.0

23.0

21.4

.7

28



340

23.0

26.0

24.6

.0

11



341

20.0

25.0

22.2

.7

6



422

24.0

30.0

26.3

.4

14



423

20.0

31.5

24.1

2.1

50



432

20.0

30.0

23.9

2.6

22



437

16.5

22.5

19.3

1.4

50



438

6.5

10.0

8.2

.8

100



445

17.0

20.5

18.0

.9

51



455

17.5

25.0

19.1

1.5

50



464

19.0

23.5

20.9

.9

50



465

21.0

27.0

24.2

1.8

11

BRAMIDAE

BRA







Brama brama

BRABRO 1









3

25.5

35.5

30.3

2.2

92

CAPROIDAE

CAP







Antigonia capros

CAPANO 1









161

6.0

11.0

9.3

.9

70



181

6.5

12.5

9.8

1.4

91

Capros aper

CAPCAO 1









8

8.0

11.5

9.9

1.0

81

CARANGIDAE

CAR







Alectis alexandrinus

CARALO 1









58

36.0

65.0

49.6

7.6

57



89

41.0

61.0

51.1

4.7

38



117

52.0

53.0

52.5

.7

2



405

35.0

56.0

43.0

4.3

32

Caranx sp

CARCAO 0









83

9.5

15.5

11.8

.9

81

Caranx crysos

CARCAO 2









58

39.0

51.0

42.8

3.4

12



284

27.0

39.0

33.6

3.3

17



396

30.5

31.5

31.0

.6

4

Caranx senegallus

CARCAO 3









284

27.0

31.0

29.0

1.1

13



285

27.0

34.0

30.5

2.1

11

Chloroscombrus chrysurus

CARCHO 1









49

22.0

26.0

24.0

1.3

11



59

17.0

24.0

19.4

1.5

69



64

14.5

24.5

17.0

1.5

68



66

21.0

23.5

22.1

.8

22



98

16.5

29.0

22.8

2.1

86



99

16.0

22.5

19.0

1.7

38



101

16.5

29.5

24.0

2.6

51



122

13.0

17.5

14.5

.9

50



146

11.0

21.0

16.9

2.9

84



150

8.5

22.5

19.7

4.0

20



153

19.0

22.0

20.2

.8

43



175

11.0

25.5

18.9

3.7

126



180

8.0

22.5

13.6

2.8

149



183

5.0

19.5

11.6

2.7

153



186

14.0

20.0

16.2

1.2

37



283

16.0

21.0

18.3

1.2

14



287

15.0

25.0

19.4

1.4

59



309

17.0

23.0

19.6

1.2

65



319

20.0

25.0

22.4

1.4

46



398

28.5

35.5

31.6

1.9

32

Campogramma glaycos

CARCMO 1









407

35.0

54.0

46.1

4.3

17

Decapterus punctatus

CARDEO 1









123

10.5

23.0

17.6

2.2

58



132

7.0

20.0

13.6

2.9

74



135

9.0

19.0

13.5

2.7

28



138

15.0

23.0

18.2

1.5

117



141

10.0

17.0

13.5

1.7

86



143

13.0

23.0

18.1

2.0

100



158

9.5

17.5

11.8

1.5

64



160

13.0

17.5

15.3

1.0

77



165

11.5

17.5

15.1

2.0

10



166

11.5

17.0

13.9

1.4

115



187

16.5

21.0

18.3

1.0

60



189

16.5

22.0

18.5

1.4

21



193

13.0

20.5

16.4

1.8

27



194

5.0

18.5

11.6

3.2

97

Decapterus rhonchus

CARDEO 2









7

16.0

29.0

21.8

4.5

81



29

29.0

39.0

32.1

2.5

35



30

28.5

33.0

30.7

1.2

19



31

29.5

37.0

31.7

1.6

27



43

33.5

39.5

36.1

1.7

13



47

30.5

43.0

36.3

3.5

11



54

31.0

34.5

32.1

1.3

6



60

23.5

25.0

24.3

.7

5



66

21.0

28.0

24.2

2.4

18



83

12.0

14.5

13.9

1.3

4



90

30.5

35.0

32.6

1.6

8



92

31.0

45.0

38.4

3.2

35



98

21.0

22.5

21.6

.7

9



109

26.0

35.0

30.8

3.0

12



112

24.0

32.0

27.4

1.6

81



113

25.5

26.5

26.0

.7

2



123

23.0

27.0

25.0

1.0

17



305

24.0

31.0

26.6

1.7

53



309

23.0

29.0

25.5

1.7

21



311

10.0

16.0

14.8

1.0

54



316

15.0

18.0

16.5

.6

80



319

11.0

26.0

14.9

4.5

19



324

10.0

30.0

21.6

5.5

63



326

11.0

24.0

16.0

4.7

12



330

13.0

29.0

24.4

6.1

14



336

26.0

30.0

28.0

1.1

27



337

4.0

13.0

9.2

2.4

116



340

9.0

31.0

20.6

8.2

30



341

10.0

13.0

11.3

.7

32



390

7.5

11.0

9.4

.7

60



391

6.5

13.5

8.0

1.4

75



391

15.5

28.0

20.5

3.3

44



392

22.0

43.0

31.5

4.6

185



396

20.5

35.0

25.8

4.4

42



397

14.0

33.0

16.8

4.2

25



399

16.5

30.0

24.1

2.2

172



400

18.0

37.0

29.7

3.0

71



405

32.5

36.5

34.7

1.2

16



406

14.0

37.0

25.5

9.8

15



436

33.0

38.0

35.5

1.3

23

Selar crumenophthalmus

CARSAO 1









194

25.0

30.0

27.8

1.6

10

Selene dorsalis

CARSLO 1









66

18.5

22.0

19.9

1.0

17



131

24.0

30.0

27.2

1.5

22



146

9.5

23.0

16.1

4.8

27



153

5.0

19.0

11.0

2.5

42



169

16.5

23.0

18.2

1.0

68



180

15.0

21.5

16.6

1.6

19



270

22.0

26.0

24.0

1.0

44



272

20.0

25.0

23.5

1.4

35



314

12.0

22.0

19.2

2.6

18



398

14.0

32.0

22.0

5.8

23

Trachinotus maxillosus

CARTCO 1









288

13.0

24.0

18.5

2.8

24

Trachinotus ovatus

CARTCO 3









322

27.0

32.0

29.6

1.2

26



398

33.0

40.0

35.8

1.4

56



502

6.0

10.0

8.1

.8

100

Trachurus trachurus

CARTRO 1









6

6.5

19.5

11.0

3.6

44



10

17.0

19.5

18.3

1.2

4



16

27.5

32.0

30.1

1.2

11



23

2.5

6.0

4.5

.8

138



48

32.5

36.0

34.4

1.2

9



389

28.0

39.0

32.9

3.1

17



390

7.5

10.0

8.4

.6

59



394

11.0

15.0

12.7

.9

127



483

26.0

34.5

30.5

2.7

15



486

14.0

35.0

22.0

6.5

195



494

17.0

35.0

27.1

2.9

134



498

6.0

12.0

9.2

1.2

100



502

5.0

11.0

7.6

1.2

111



504

13.5

27.0

19.0

2.5

103



512

15.0

22.0

16.9

1.4

101

Trachurus trecae

CARTRO 2









1

13.0

26.5

17.3

3.0

78



2

10.0

24.0

16.6

2.6

78



6

11.0

18.5

14.5

2.5

16



7

11.0

22.5

15.5

1.8

146



8

16.0

19.5

18.0

1.0

11



10

11.0

25.5

22.7

3.3

17



15

12.5

17.0

15.7

.7

59



16

20.0

26.5

22.6

2.4

5



17

15.5

17.0

16.4

.6

10



19

20.0

25.5

22.7

1.3

70



20

27.5

34.5

30.8

1.6

18



21

29.0

34.0

31.3

1.1

38



22

16.0

26.0

23.3

1.6

82



26

21.0

25.5

22.5

1.0

50



27

8.0

9.5

8.7

.7

9



29

17.0

24.5

19.6

3.0

5



31

15.5

27.5

22.1

3.1

79



32

17.5

32.0

26.3

4.2

39



33

5.5

8.0

6.9

.5

149



38

16.0

25.5

18.9

2.1

102



40

22.0

36.5

33.1

4.3

37



41

33.5

40.0

36.1

1.6

17



42

2.5

8.0

5.4

1.6

88



43

15.5

23.5

18.4

2.0

43



44

35.5

40.5

38.3

1.8

12



47

20.5

35.0

31.6

4.8

26



48

30.5

41.5

35.2

2.2

49



49

14.5

22.5

16.6

1.7

74



51

14.5

23.5

20.1

1.7

81



53

16.0

29.5

20.4

3.2

40



54

4.5

11.0

8.4

1.6

62



54

16.0

20.0

16.9

.8

49



103

6.5

11.5

7.7

.7

126



113

8.0

18.0

14.4

4.0

8



318

16.0

20.0

17.5

.8

73



320

14.0

18.0

15.9

.6

84



321

9.0

15.0

11.4

1.0

133



327

9.0

13.0

10.6

.7

118



331

15.0

19.0

17.1

.9

71



335

3.0

17.0

6.5

4.7

17



336

11.0

24.0

19.3

3.0

75



341

15.0

20.0

17.4

.8

92



390

6.5

15.5

9.2

1.5

100



394

13.0

27.5

20.3

3.4

100



397

22.0

28.5

24.8

1.4

131



401

15.0

18.0

16.7

.6

99



406

18.0

31.0

23.4

2.6

100



407

5.5

13.0

8.2

1.1

101



422

14.0

20.5

15.8

1.2

49



425

15.0

17.5

16.2

.7

49



431

32.0

39.5

35.0

1.6

65



431

13.0

22.0

15.0

1.4

100



458

31.0

40.0

35.0

1.4

80



467

4.2

6.0

5.0

.4

50



469

15.0

25.0

18.8

2.1

99



471

15.0

23.5

18.2

1.9

38



479

15.5

29.0

24.7

2.6

42



483

29.5

35.0

31.6

1.3

22



485

20.0

40.0

31.6

4.9

100



490

12.0

41.0

17.8

7.9

247

CHILODIPTERIDAE

CHI







Epigonus telescopus

CHIEPO 1









197

6.0

9.5

7.6

.6

81

Hypoclydonia bella

CHIHYO 1









155

7.0

9.0

8.2

.5

29

CLUPEIDAE

CLU







CLUPEIDAE

CLUAAO 0









7

5.5

7.0

6.2

.4

48

Ilisha africana

CLUILO 1









64

10.0

19.5

12.5

1.8

109



67

11.0

21.0

14.2

3.0

26



98

10.5

24.5

14.4

3.7

48



99

10.5

22.5

16.8

3.1

60



100

10.5

23.5

14.8

3.3

60



104

11.0

17.5

13.2

1.0

49



107

18.0

22.0

19.6

1.1

54



127

11.5

21.0

13.9

2.4

50



133

10.0

24.0

12.3

1.9

79



150

7.0

20.0

13.5

3.3

60



153

10.5

21.5

16.4

3.0

49



169

17.5

25.0

21.1

2.5

10



180

8.0

16.5

10.3

1.4

199



281

11.0

24.0

17.7

3.0

16



282

11.0

18.0

14.0

1.7

16



283

5.0

18.0

13.3

2.8

84



314

16.0

23.0

20.0

1.8

30



315

15.0

22.0

19.8

1.8

20



403

14.5

26.0

20.7

2.7

42



404

5.5

13.5

8.9

1.5

242

Sardina pilchardus

CLUSDO 1









10

7.5

12.0

10.3

.8

159



14

7.5

9.5

8.3

.4

108



390

10.0

15.0

12.3

.0

112



498

5.5

12.5

7.4

.4

100



502

10.0

14.5

12.4

.0

50



502

4.5

7.5

6.1

.5

100



505

16.5

21.0

19.2

.9

99



507

16.0

23.0

18.0

.1.3

102



510

16.0

21.0

18.0

.1

100



511

16.5

21.0

18.4

.8

100



512

14.5

20.0

16.1

.9

99

Sardinella aurita

CLUSLO 1









17

13.5

26.0

17.7

3.4

37



19

22.5

28.0

25.0

1.2

22



31

32.0

38.5

35.2

2.4

8



47

33.5

38.5

35.5

1.3

15



49

12.0

26.5

19.3

6.1

8



55

18.0

22.5

20.7

1.0

45



58

8.0

15.0

10.7

1.9

87



83

10.0

13.5

11.3

.6

99



89

9.5

11.5

10.7

.5

67



97

9.5

13.0

10.9

.8

38



103

8.5

12.5

10.0

.8

32



105

11.0

25.5

21.0

6.6

20



111

21.5

35.0

28.5

3.5

48



113

13.5

22.0

16.7

1.4

70



123

13.0

22.0

15.3

1.8

55



124

14.0

25.0

17.4

4.6

8



129

10.0

18.5

13.3

2.2

98



132

12.0

18.0

14.3

1.4

69



135

7.0

14.5

9.3

1.2

95



140

10.0

14.0

12.2

1.2

15



141

10.5

16.5

13.7

1.4

61



143

11.0

19.5

14.4

2.3

50



159

7.0

10.5

8.4

.7

101



160

10.0

19.0

16.1

1.2

70



165

6.0

13.0

9.6

.9

144



166

7.5

17.0

13.4

2.4

98



169

20.5

27.5

24.1

2.1

9



169

6.0

11.5

8.4

.8

151



173

21.0

25.0

22.6

1.2

12



175

11.5

24.5

23.0

2.3

32



184

18.5

22.0

19.8

.8

57



187

18.0

22.5

20.0

.8

206



189

17.5

24.5

19.5

1.2

236



190

15.0

23.5

19.9

2.5

14



192

9.5

15.5

12.0

.9

121



193

15.5

20.5

18.0

.8

102



200

17.0

22.5

19.6

1.5

16



280

18.0

24.0

21.2

1.1

72



289

21.0

25.0

23.3

1.0

31



298

20.0

23.0

21.5

.8

39



305

21.0

25.0

22.8

1.0

22



306

20.0

25.0

21.7

1.0

88



311

13.0

18.0

13.9

.9

60



318

17.0

22.0

20.1

1.0

30



327

8.0

12.0

10.3

1.0

14



330

20.0

25.0

22.6

1.7

7



331

17.0

25.0

20.7

1.9

25



336

23.0

30.0

25.6

2.0

12



337

10.0

22.0

12.2

1.5

107



339

19.0

28.0

22.6

2.2

55



341

20.0

23.0

21.2

.7

50



389

36.0

39.0

37.3

1.1

10



390

10.0

18.0

12.2

1.6

35



396

30.0

39.5

34.1

3.1

10



458

30.0

38.0

34.0

1.8

77



497

25.0

33.0

27.7

1.3

111

Sardinella maderensis

CLUSLO 2









30

19.5

23.0

20.8

.8

33



49

15.0

26.5

24.2

3.7

9



54

17.0

30.0

22.9

2.9

61



55

22.0

28.0

24.1

1.4

35



56

22.0

27.0

24.3

1.2

44



96

24.0

32.0

26.8

1.6

41



101

20.5

26.5

23.0

1.4

52



105

21.0

27.0

23.1

1.2

69



107

23.0

27.0

25.6

1.3

12



111

24.0

32.0

27.3

1.7

106



113

13.5

20.5

16.7

1.5

107



144

10.5

25.0

12.5

2.8

42



146

9.0

23.0

18.4

3.1

146



147

10.0

24.5

18.3

4.3

57



150

9.5

16.0

13.0

1.4

27



151

9.5

22.5

16.1

2.5

256



152

9.5

24.0

14.1

4.1

112



156

9.0

23.5

17.4

5.8

31



168

6.5

13.5

10.6

1.9

15



169

7.5

13.0

9.2

.9

184



169

12.5

27.0

19.3

3.9

44



170

9.5

15.0

11.5

.8

119



172

7.0

11.5

8.5

.8

91



173

7.5

19.0

11.6

2.9

21



175

9.0

23.5

13.7

3.9

164



180

4.5

18.0

11.3

2.9

88



183

11.0

12.5

11.7

.4

16



186

15.5

19.5

17.9

1.2

10



192

9.0

23.5

10.4

1.2

159



194

6.5

10.0

7.8

.8

96



196

9.5

13.5

11.1

.9

52



280

16.0

22.0

19.4

1.3

73



282

15.0

22.0

18.3

1.3

97



287

21.0

27.0

23.1

1.4

80



293

17.0

23.0

18.6

1.4

58



298

17.0

21.0

18.3

.9

34



302

18.0

24.0

19.9

1.6

47



303

15.0

20.0

18.0

1.4

33



304

15.0

19.0

17.1

.8

28



305

18.0

23.0

20.0

1.5

19



306

17.0

23.0

20.0

1.2

26



308

17.0

22.0

17.7

.9

69



309

18.0

20.0

19.3

.6

11



310

19.0

22.0

20.4

1.0

22



314

10.0

26.0

18.3

6.3

10



315

9.0

24.0

15.0

6.8

6



322

210.0

218.0

213.7

2.0

93



323

19.0

27.0

24.0

1.8

19



337

10.0

13.0

11.4

.7

30



,398

27.0

35.5

30.4

2.7

22



407

7.5

11.5

9.8

.8

98



407

20.0

33.5

27.4

1.5

111



452

4.5

6.5

5.8

.5

50



462

21.5

25.5

23.4

.9

50

DACTYLOPTERIDAE

DAC







Dactylopterus volitans

DACDAO 1

57

20.0

44.0

28.3

6.0

13











269

19.0

33.0

24.1

3.0

44



273

20.0

34.0

22.5

2.5

115



274

19.0

26.0

21.1

1.6

60



275

19.0

31.0

22.6

1.9

149



277

22.0

33.0

27.3

3.1

12

ENGRAULIDAE

ENG







Engraulis sp

EBGENO 0









452

5.0

7.0

5.8

.5

50

Engraulis encrasicolus

ENGENO 1









10

9.0

11.0

9.8

.5

102



12

12.0

14.0

13.0

.5

16



13

11.5

14.5

13.1

.7

90



14

8.0

10.5

8.6

.5

96



17

8.5

12.5

10.7

.8

104



28

5.0

11.0

9.7

1.8

26



42

4.5

9.5

6.5

1.4

16



58

7.0

12.0

9.2

9

99



61

7.5

13.0

9.0

1.1

94



70

8.0

11.0

9.6

.6

79



89

7.5

9.0

8.2

.4

68



91

7.5

9.5

8.5

.4

43



94

11.0

13.5

12.3

.6

75



97

6.5

11.5

8.8

1.3

111



103

7.5

9.0

8.2

.5

110



110

8.0

11.0

9.3

.7

54



129

8.5

11.5

9.8

.7

135



135

5.0

9.5

8.1

.7

128



140

8.0

12.5

10.4

1.2

74



143

11.5

13.0

12.1

.5

30



159

6.5

11.0

8,7

.8

231



165

9.5

12.5

11.2

.7

43



168

5.5

9.0

7.4

.9

11



169

5.0

8.5

6.7

.9

50



172

4.0

9.0

6.2

1.1

131



180

,7.0

10.0

8.7

.7

45



194

5.0

7.5

6.0

.5

117



278

8.0

11.5

9.8

.8

190



327

7.0

10.0

8.5

1.1

82



328

6.5

9.0

7.5

.4

142



330

8.5

12.0

9.6

.6

147



407

7.0

10.0

8.4

.7

100



472

6.5

10.5

7.5

.6

99



492

6.5

12.0

8.8

1.1

100



498

7.0

11.0

9.2

.8

100



502

4.5

7.5

5.8

.6

100

GEMPYLIDAE

GEM







Gempylus serpens

GEMGEO 1









139

13.5

23.5

14.8

1.7

35

GERREIDAE

GER







Eucinostomus melanopterus

GEREUO 1

303

14.0

19.0

15.8

1.4

33



317

15.0

19.0

16.8

1.1

30

MAENIDAE

MAE







Smaris macrophthalmus

MAESMO 1









394

12.5

14.0

13.5

.4

44

MERLUCCIIDAE

MER







Merluccius sp

MERMEO 0









495

10.5

19.0

14.0

1.8

100

Merluccius merluccius

MERMEO 1









394

22.0

41.0

28.2

3.6

51



504

17.0

30.0

21.8

3.7

33

Merluccius polli

MERMEO 3









21

36.0

44.0

40.0

2.4

14



38

26.5

38.0

32.8

2.3

49

MULLIDAE

MUL







Pseudupeneus prayensis

MULPSO 1









112

13.5

23.0

18.8

2.1

24



122

12.0

16.5

14.9

1.3

12



187

14.5

27.5

21.9

3.3

43



297

15.0

21.0

18.6

1.6

22



307

17.0

22.0

19.2

1.3

21



317

16.0

23.0

19.4

1.5

23



324

14.0

21.0

17.8

2.0

15



340

7.0

18.0

11.8

2.9

24



397

10.0

24.5

17.5

4.1

30



399

13.5

25.0

18.7

4.1

14

MYCTOPHIDAE

MYC







MYCTOPHIDAE

MYCAAO 0









139

7.0

11.0

8.5

1.2

35

Ceratoscopelus sp

MYCCEO 0









197

4.5

6.5

5.5

.4

71

OPHIDIIDAE

OPD







Brotula barbata

OPDBRO 1









38

28.0

57.0

40.7

8.5

10

POLYNEMIDAE

PLN







Galeoides decadactylus

PLNGAO 1









63

11.0

18.0

14.6

2.4

17



133

10.5

25.0

17.6

4.5

24



145

14.5

29.0

21.3

3.8

29



292

9.0

24.0

16.1

2.2

84



303

15.0

28.0

17.1

2.5

35



403

14.0

32.0

17.5

3.8

48



404

12.0

22.5

18.6

3.0

28

POMADASYIDAE

POD







Brachydeuterus auritus

PODBRO 1









29

9.0

23.0

19.6

3.3

67



30

17.0

22.0

20.1

1.2

47



31

18.5

23.5

21.5

1.0

35



39

8.0

22.0

13.9

5.5

62



42

8.5

11.5

9.8

.8

45



43

8.0

22.0

17.7

4.8

72



49

13.5

23.5

17.0

2.1

60



56

21.5

26.0

23.7

1.1

54



59

10.0

17.0

14.5

1.6

76



62

9.0

19.0

14.1

2.8

75



63

8.0

19.0

13.1

2.0

47



68

6.5

19.0

9.2

2.8

64



96

6.5

20.0

11.5

4.4

55



104

6.5

15.5

8.0

1.3

86



107

8.0

20.0

11.1

3.0

58



122

7.0

13.5

9.5

1.6

50



127

12.0

19.5

15.6

2.1

50



133

12.0

20.0

15.5

2.0

35



144

7.5

19.5

14.1

3.1

55



145

10.0

19.0

16.0

2.2

35



146

8.5

18.0

14.8

2.3

53



148

9.0

18.5

12.7

2.4

159



150

8.5

18.5

14.4

2.8

47



168

6.0

17.5

9.4

2.0

160



170

8.5

14.0

11.0

1.9

15



180

7.5

9.0

8.4

.4

23



192

12.5

17.5

15.3

1.0

70



194

11.5

19.0

15.3

1.0

79



279

6.0

20.0

14.1

2.2

68



283

5.0

17.0

12.4

2.6

57



287

10.0

19.0

15.4

2.1

18



292

12.0

20.0

15.2

1.5

91



293

16.0

19.0

17.3

.7

93



303

13.0

20.0

15.5

1.8

89



304

13.0

19.0

16.5

1.3

35



314

10.0

20.0

12.9

2.9

79



317

19.0

19.0

17.3

1.1

47



319

14.0

20.0

17.9

1.2

47



340

15.0

23.0

19.2

1.6

30



341

17.0

21.0

19.3

.8

52



398

20.0

23.0

21.6

.9

13



400

15.5

22.5

19.3

1.9

100



402

15.0

22.5

17.9

1.6

100



403

10.0

20.5

16.4

1.7

132



404

7.0

22.0

18.7

4.1

106



405

16.0

24.0

21.5

1.1

100



406

9.0

19.0

11.2

1.8

55



407

5.5

9.0

7.0

.8

100



426

9.5

22.0

17.0

2.1

100



454

10.5

16.5

14.1

1.5

50



473

16.5

23.0

20.8

1.1

100



477

17.5

24.0

21.4

1.2

100



479

19.5

23.5

21.8

.9

41



479

6.0

12.5

8.4

1.3

101

Parapristipoma octolineatum

PODPAO 1









18

29.0

39.0

33.1

3.5

7

Plectorhynchus mediterraneus

PODPLO 1









1

32.0

45.0

38.0

3.1

41



18

29.0

49.0

35.9

4.9

16



112

19.0

26.5

22.2

2.1

14



397

12.0

44.0

27.1

10.6

30

Pomadasys sp

PODPOO 0









63

23.5

38.0

31.4

3.7

42

Pomadasys jubelini

PODPOO 1









59

24.0

30.0

27.5

2.6

8



88

26.5

33.5

29.7

1.6

33



90

30.0

37.0

33.9

1.6

24



133

22.0

25.0

23.4

.9

12



428

21.5

28.5

24.4

3.0

4



443

36.0

45.0

40.4

3.0

9

Pomadasys incisus

PODPOO 2









297

17.0

23.0

20.6

1.9

12



307

16.0

23.0

19.1

2.3

23



391

22.0

29.5

25.9

1.8

132



397

22.0

28.5

24.6

1.7

16



495

24.0

29.5

26.7

1.2

72

Pomadasys peroteti

PODPOO 3









117

21.0

27.0

23.6

1.4

15

Pomadasys rogeri

PODPOO 4









339

20.0

24.0

22.3

1.7

14



340

20.0

24.0

21.4

1.2

11

POMATOMIDAE

POT







Pomatomus saltatrix

POTPOO 1









31

55.0

62.0

58.5

4.9

2



47

50.0

95.0

66.7

24.7

3



111

48.0

55.0

50.0

2.7

6



443

46.0

51.0

48.3

2.2

4



123

37.0

40.0

38.8

1.2

6

PRIACANTHIDAE

PRI







Priacanthus arenatus

PRIPRO 1









160

8.5

16.5

12.7

1.3

36



313

7.0

8.0

7.4

.5

25

SCIAENIDAE

SCI







Argyrosomus sp

SCIARO 0









397

50.0

58.0

52.2

2.5

10

Argyrosomus regius

SCIARO 1









29

35.0

55.0

52.7

6.0

12



407

42.0

74.0

60.1

10.3

14

Pseudotolithus sp

SCIPSO 0









67

100.0

113.0

107.7

6.8

3



428

14.5

29.0

18.0

2.1

100

Pseudotolithus elongatus

SCIPSO 1









99

11.5

20.0

16.6

2.7

24



404

22.0

38.0

28.8

5.8

38

Pseudotolithus senegalensis

SCIPSO 2









145

14.0

28.0

19.9

4.6

8



407

51.0

76.0

57.1

8.5

7



407

93.0

114.0

106.3

6.9

15

Pseudotolithus typus

SCIPSO 3









281

9.0

21.0

15.6

3.0

58

Pteroscion peli

SCIPTO 1









99

8.5

17.0

14.1

2.0

26



279

7.0

17.0

10.8

2.9

25



281

8.0

24.0

16.1

2.7

129



404

7.0

24.0

14.7

4.2

165



474

9.0

22.0

18.2

3.4

50

Umbrina canariensis

SCIUMO 1









18

29.0

35.0

31.6

2.1

7

SCOMBRIDAE

SCM







Euthynnus alletteratus

SCMEUO 1









44

45.0

46.0

45.5

.7

2

Scomber japonicus

SCMSCO 1









19

25.0

30.5

27.0

1.3

47



21

26.5

39.0

32.4

4.9

5



22

25.5

30.5

27.6

1.4

13



26

23.0

30.5

26.1

2.2

25



33

6.5

12.0

9.9

1.5

38



49

11.5

25.5

16.6

4.6

12



108

17.0

21.0

19.3

.8

46



111

21.0

30.0

27.8

1.9

22



311

20.0

22.0

20.6

.7

13



458

35.0

45.5

38.1

3.9

6



504

18.5

29.0

20.5

1.7

36



505

20.0

27.5

24.3

1.7

50



512

18.5

25.5

21.2

1.2

100

Scomberomorus tritor

SCMSMO 1









58

40.0

67.0

48.6

5.8

26



105

30.5

39.5

36.2

1.8

57



147

36.0

50.0

39.2

3.4

37

SERRANIDAE

SER







Epinephelus aeneus

SEREPO 1









18

52.0

76.0

61.5

9.9

6



90

60.0

75.0

65.8

7.2

4



112

43.0

72.0

57.5

20.5

2



407

56.0

85.0

70.4

8.8

11

Epinephelus guaza

SEREPO 2









117

75.0

75.0

75.0

.0

1

Epinephelus fasciatus

SEREPO 3









18

35.0

64.0

52.9

9.7

15



90

41.0

41.0

41.0

.0

1

Mycteroperca rubra

SERMYO 1









493

7.5

11.0

8.8

.5

90

SHRIMPS

SHR







Penaeus P kerathurus

SHRPE62









492

10.0

17.5

13.0

1.4

177

SPARIDAE

SPA







SPARIDAE

SPAAAO 0









317

12.0

25.0

16.6

3.3

34

Boops boops

SPABOO 1









49

13.0

21.0

14.5

1.4

105



53

14.0

21.5

19.3

1.7

51



116

6.5

19.5

16.9

1.8

105



117

14.5

22.5

19.1

1.6

50



158

9.0

19.5

10.9

1.6

103



311

12.0

17.0

14.9

1.0

63



316

14.0

19.0

15.1

1.6

20



320

14.0

16.0

14.5

.7

10



340

7.0

16.0

8.5

2.3

25



343

15.0

20.0

16.9

1.0

120



397

11.5

26.0

15.3

4.5

62

Dentex angolensis

SPADEO 1









117

16.0

22.5

19.3

1.3

49



143

12.0

22.0

15.0

2.8

12



164

15.5

24.0

21.9

1.9

108



177

14.0

28.5

23.8

2.9

145



311

11.0

17.0

14.6

1.5

93



312

13.0

21.0

15.8

1.8

64



316

11.0

19.0

15.2

1.9

43

Dentex canariensis

SPADEO 2









18

21.0

42.0

31.4

5.6

17



187

24.5

29.0

26.3

1.5

10



489

18.0

33.0

21.2

2.9

100

Dentex macrophthalmus

SPADEO 3









38

16.0

29.0

23.0

3.1

27



320

11.0

13.0

11.8

.7

87



394

11.0

22.0

15.1

2.9

97

Dentex congoensis

SPADEO 4









15

10.5

17.5

12.1

1.9

17



116

18.5

21.5

19.9

1.2

6



119

7.5

20.0

14.3

3.6

77



143

10.5

21.5

15.3

3.0

70



164

12.5

22.0

17.7

2.1

65



177

11.0

20.5

16.2

2.4

49



181

10.0

19.0

13.6

2.7

35



394

11.5

20.5

18.0

1.8

44

Dentex gibbosus

SPADEO 5









18

37.0

48.0

40.4

4.7

8

Dentex barnardi

SPADEO 6









340

6.0

16.0

11.4

3.0

29

Dentex maroccanus

SPADEO 7









468

10.5

20.0

16.5

1.9

50

Diplodus sp

SPADIO 0









49

20.0

29.5

25.8

3.3

6

Diplodus bellottii

SPADIO 1









1

13.5

20.5

17.7

1.4

55



7

10.0

20.5

15.8

2.4

85



49

16.5

20.0

18.3

1.4

5



406

15.0

24.5

18.2

3.0

13

Lithognathus mormyrus

SPALIO 1









82

29.5

38.0

33.4

2.9

7

Pagellus bellottii

SPAPAO 2









1

21.0

30.0

26.3

2.8

11



7

7.5

19.5

11.4

2.5

19



18

20.0

33.0

27.1

2.6

46



49

11.5

25.0

19.0

3.5

70



53

13.0

24.0

18.2

2.9

74



57

19.0

24.0

21.3

1.6

14



90

21.5

33.0

24.1

2.3

21



109

17.5

27.5

21.2

2.0

71



112

14.0

24.5

20.2

2.1

40



117

11.5

26.0

19.9

3.3

49



122

8.0

19.0

10.6

2.0

93



164

16.0

20.5

18.9

1.3

16



177

10.0

24.5

16.9

4.3

143



187

16.5

27.5

20.8

2.6

59



270

17.0

21.0

19.3

1.3

25



297

17.0

22.0

19.9

1.4

20



319

15.0

25.0

19.8

2.2

31



324

13.0

19.0

14.6

1.0

57



326

8.0

21.0

15.3

3.1

74



.334

15.0

24.0

17.3

2.0

73



335

11.0

17.0

14.2

1.6

21



337

4.0

16.0

7.3

1.8

98



339

9.0

23.0

19.7

3.1

19



340

6.0

23.0

14.4

4.1

124



341

9.0

20.0

14.2

2.6

50



391

10.0

32.0

20.0

3.3

43



393

10.0

27.0

16.1

3.3

110



395

12.0

32.0

19.5

5.4

51



396

21.5

29.5

27.0

2.2

18



397

11.5

26.0

18.6

3.8

131



399

13.0

29.0

19.1

4.0

142



422

20.0

22.5

21.2

1.0

9



492

5.0

27.0

15.4

5.4

100

Sparus caeruleostictus

SPASAO 1

(...)

31.0

46.0

36.7

4.0

27



80

23.0

29.0

25.3

2.5

5



82

19.0

27.0

23.0

3.0

6



143

24.0

27.5

25.7

1.8

3



297

21.0

29.0

23.8

2.3

26



443

25.0

39.5

31.3.

3.6

27

SPHYRAENIDAE

SPH







Sphyraena dubia

SPHSPO 1









26

41.0

49.0

44.4

2.8

7



58

42.0

52.0

46.2

2.9

10



59

33.0

47.0

40.6

3.3

33



117

49.0

54.0

51.3

1.9

7



452

40.0

54.0

45.3

4.0

35

Sphyraena sphyraena

SPHSPO 2









30

41.0

48.0

44.8

1.9

16



49

42.0

50.0

45.9

2.9

8



405

26.5

40.0

30.3

2.9

23

Sphyraena piscatorum

SPHSPO 3









66

35.0

54.0

47.1

6.5

28



80

152.0

152.0

152.0

.0

1



86

91.0

93.0

92.0

1.4

2



96

40.0

56.0

46.4

5.9

28



101

38.0

53.0

43.8

4.1

24



103

34.0

49.0

41.2

4.0

40



104

28.0

51.0

39.1

5.2

28



132

21.5

31.0

23.9

2.3

18



144

12.0

41.0

32.8

6.2

92



147

19.0

44.0

30.5

6.9

99



148

15.0

42.0

25.5

8.3

40



151

16.0

22.0

18.4

1.9

7



153

15.5

30.0

24.7

3.7

23



156

16.0

45.0

24.2

7.1

30



168

19.0

24.0

20.8

1.8

6



169

17.0

39.0

26.7

5.9

53



170

20.0

27.5

22.7

1.8

18



175

13.0

27.5

20.8

2.0

124



183

35.0

60.0

47.3

8.9

12



194

22.0

47.0

28.3

6.0

15



315

40.0

56.0

46.3

4.5

26

CEPHALOPODA

SQU







Loligo vulgaris

SQULO 21









406

9.0

36.0

16.9

5.2

44

STROMATEIDAE

STR







Stromateus fiatola

STRSTO 1









66

30.0

44.5

37.2

4.4

17



398

37.0

45.0

41.7

2.4

15

SYNODONTIDAE

SYN







Saurida brasiliensis

SYNSAO 1









68

9.0

13.0

11.1

.9

46



70

9.0

14.5

10.8

1.0

82



140

7.5

11.5

9.5

.8

86

TRIGLIDAE

TRG







Lepidotrigla carolae

TRGLEO 1









57

17.0

24.5

20.9

2.0

24

TRICHIURIDAE

TRI







Trichiurus lepturus

TRITRO 1









26

93.0

119.0

103.3

6.8

15



40

45.0

125.0

92.5

21.2

71



46

45.0

125.0

67.3

21.8

31



279

20.0

70.0

40.7

15.2

51



314

22.0

50.0

33.4

6.8

43



315

20.0

90.0

51.0

24.8

26



329

75.0

115.0

94.7

9.9

30



389

92.0

126.0

109.3

8.0

54



395

91.0

109.0

103.4

5.5

10



399

43.0

112.0

83.7

25.4

14



404

33.0

102.0

55.6

23.3

36

ZEIDAE

ZEI







Zeus faber

ZEIZEO 1









431

24.0

53.0

42.3

8.9

16


ANNEX IV Length Frequency Distributions (raw data)

IV a

IV b

IV c

IV d

IV e

IV f

IV g

IV h

ANNEX V List of Species caught off West Africa from Agadir to Ghana, with reference to station numbers where caught and to catch/hour (in brackets).

When catch is given as 0.0, species is present but with less than 0.1 kg/hour in catch.

V a

V b

V c

V d

V e

V f

V g

ANNEX VI Further Catch Data by Region and Survey

Key to the family codes used in the tables on processed caych data :

APO - Apogonidae

PLN - Polynemidae

ARD - Ariidae

POD - Pomadasyidae

BAL - Balistidae

RAY - Rays

CAP - Caproidae

SCI - Sciaenidae

CAR - Carangidae

SCM - Scombridae

CEN - Centropomidae

SER - Serranidae

CLU - Clupeidae

SHA - Sharks

CRU - Krill

SHR - Shrimps

DAC - Dactylopteridae

SPA - Sparidae

ENG - Engraulidae

SPH - Sphyraenidae

JEL - Jellyfish

SQU - Squids

MER - Merlucciidae

TRG - Triglidae

MUL - Mullidae

TRI - Trichiuridae

MYC - Myctophidae

ZEI - Zeiidae


Summary of catches from stn. 1 to stn. 47, Cape Verde - Cape Blanc, May 1981

GEAR: BOTTOM TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

POD

0

2

0

1

2

46

2533.4

62

2070.6

1698.3

11 .3

.0

CAR

2

0

1

3

2

73

491.3

19

221.3

271.1

570.8

420.0

JEL

0

1

5

1

1

73

193.2

8

100.0

251.4

29.5

.0

SPA

1

2

4

1

0

77

85.5

3

137.9

36.9

48.1

79.8

SCI

3

0

0

1

0

36

84.6

2

160.0

1.2

2.2

5.6

SQU

0

3

2

0

0

46

60.7

2

30.0

8.6

66.8

.0

TRI

0

1

0

1

0

18

215.6

2

196.4

7.7

.0

.0

MER

0

0

1

0

0

9

194.6

1

.0

.0

.0

194.6

SER

0

0

0

1

0

9

209.9

1

.0

.0

70.0

.0

Other fish







15.8

0





MEAN CATCH OF ALL HAULS




1861.7


2920.0

2277.8

819.3

792.0

TOTAL NUMBER OF HAULS

11





2

5

3

1


GEAR: PELAGIC TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

JEL

1

3

4

1

3

33

745.0

21

.0

443.5

560.0

30.8

CAR

7

6

3

6

2

67

349.3

20

.0

585.6

231.5

47.8

HIS

0

1

1

1

2

14

1584.2

19

.0

582.0

40.9

95.5

CAP

0

0

0

0

1

3

7520.0

18

.0

.0

.0

395.8

SPA

0

0

0

0

1

3

2567.3

6

.0

256.7

.0

.0

CRU

1

3

3

0

2

25

214.3

5

.0

.0

114.3

59.4

POD

1

1

0

1

1

11

375.9

4

.0

150.3

.0

.0

MYC

2

5

3

1

0

31

58.2

2

.0

.0

.0

33.7

TRI

5

7

4

1

0

47

48.1

2

.0

5.8

10.5

36.1

APO

0

0

0

1

0

3

286.7

1

.0

.0

.0

15.1

BAL

2

0

2

0

0

11

49.0

1

.0

19.4

.0

.1

CLU

3

3

3

0

0

25

48.1

1

.0

29.7

19.4

.0

SCM

6

2

1

0

0

25

23.0

1

.0

4.1

3.4

7.5

Other fish







20.5

1

.0




MEAN CATCH OF ALL HAULS




1168.9


.0

2108.4

985.1

742.2

TOTAL NUMBER OF HAULS

36





0

10

7

19


Summary of catches from stn. 312 to stn. 343, Cape Verde - Cape Blanc, Sept. 1981

GEAR: BOTTOM TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

CAR

1

2

3

2

5

68

1207.9

40

670.0

168.6

3464.1

221.9

SPA

3

1

1

5

5

79

809.3

31

1564.3

102.7

800.2

496.8

POD

0

0

3

4

1

42

432.5

9

160.8

295.1

.0

.0

CLU

1

4

1

0

2

42

351.5

7

14.2

304.6

.0

.0

ENG

0

0

0

0

1

5

2000.0

5

.0

222.2

.0

.0

BAL

0

1

2

2

0

26

155.9

2

112.1

24.3

.0

.0

MUL

0

1

2

1

0

21

139.6

1

101.5

5.7

.0

.0

SHA

1

0

1

1

0

16

118.1

1

.0

39.4

.0

.0

SQU

1

5

2

0

0

42

40.1

1

12.2

17.5

30.4

5.7

STR

1

1

1

0

0

16

65.5

1

.0

21 .8

.0

.0

TRI

0

1

2

0

0

16

80.0

1

15.7

17.9

.0

.0

Other fish







27.4

1





MEAN CATCH OF ALL HAULS




2057.2


2679.0

1245.2

4315.0

769.5

TOTAL NUMBER OF HAULS

19





5

9

3

2


GEAR: PELAGIC TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

CAR

3

1

2

4

1

85

496.2

80

27.8

166.1

1142.9

.0

ENG

0

0

1

1

0

15

300.4

9

.0

91.2

36.2

.0

CLU

1

5

1

0

0

54

34.3

4

46.8

21 .4

10.0

.0

TRI

2

4

1

0

0

54

38.7

4

.0

50.6

4.5

.0

SCM

2

4

0

0

0

46

17.9

2

15.8

14.4

.9

.0

ARM

1

1

0

0

0

15

16.0

1

.0

.0

1.5

13.0

SHA

0

0

1

0

0

8

60.4

1

.0

.0

15.1

.0

Other fish







2.6

0





MEAN CATCH OF ALL HAULS




523.4


94.0

346.4

1214.0

14.0

TOTAL NUMBER OF HAULS

13





2

5

4

2


Summary of catches from stn. 389 to stn. 407, Mauritania, December 1981

GEAR: BOTTOM TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

CAR

0

3

5

1

3

100

324.5

38

111.6

301.8

438.1

219.6

POD

2

1

1

3

1

67

205.7

16

303.9

221.4

3.4

.0

SPA

1

4

6

1

0

100

86.6

10

14.5

119.5

49.9

108.2

SCI

2

0

1

2

0

42

148.8

7

371.5

61.5

.9

.0

CLU

1

1

2

1

0

42

109.7

5

365.0

30.1

.8

.0

ENG

0

0

0

1

0

8

359.1

4

359.1

.0

.0

.0

SER

0

3

2

0

0

42

50.3

3

141.0

15.1

5.0

.0

SQU

5

6

1

0

0

100

22.1

3

9.0

18.8

34.9

4.2

TRI

3

1

2

0

0

50

26.9

2

.0

13.4

20.2

.0

ARD

0

4

0

0

0

53

32.6

1

28.8

16.9

.0

.0

CAP

0

0

1

0

0

8

89.2

1

.0

.0

.0

89.2

MER

0

0

1

0

0

8

95.6

1

.0

.0

.0

95.6

MUL

3

1

0

0

0

33

16.0

1

.0

9.1

2.3

.0

NOM

0

0

1

0

0

8

57.5

1

.0

.0

14.4

.0

PLN

1

1

1

0

0

25

26.4

1

6.0

12.2

.0

.0

POT

1

1

0

0

0

17

24.6

1

41.9

1.3

.0

.0

SHA

0

0

1

0

0

8

86.5

1

86.5

.0

.0

.0

SHR

2

2

1

0

0

42

24.7

1

29.9

15.3

.4

.0

STR

2

1

1

0

0

33

25.9

1

6.0

14.8

2.2

.0

ZEI

1

3

0

0

0

33

12.0

1

1.5

.0

6.6

20.0

Other fish







28.3

3





MEAN CATCH OF ALL HAULS




847.9


1892.0

886.7

597.8

572.0

TOTAL NUMBER OF HAULS

12





1

6

4

1


GEAR: PELAGIC TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

POD

1

0

1

0

2

57

722.6

65

.0

722.6

.0

.0

CAR

1

1

3

2

0

100

144.3

23

.0

171.3

158.4

8.1

TRI

0

0

2

0

0

29

128.8

6

.0

.0

83.8

90.0

SPA

0

1

1

0

0

29

38.9

2

.0

16.8

5.3

.0

CLU

3

1

0

0

0

57

7.7

1

.0

4.3

3.1

7.4

SCM

1

1

0

0

0

29

12.2

1

.0

6.1

.0

.0

SPH

2

1

0

0

0

43

12.4

1

.0

9.3

.0

.0

STR

2

1

0

0

0

43

10.4

1

.0

7.4

.7

.0

Other fish







8.5

1





MEAN CATCH OF ALL HAULS




631.2


.0

946.0

263.3

108.0

TOTAL NUMBER OF HAULS

7





0

4

2

1


Summary of catches from stn. 473 to stn. 503, Cape Verde - Cape Blanc, March 1982

GEAR: BOTTOM TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

POD

2

1

1

3

1

50

257.9

25

.0

203.8

38.1

.0

CAR

5

3

3

2

1

88

121.5

21

9.6

25.5

243.5

.0

SPA

2

7

1

0

1

69

92.6

12

.0

34.7

117.7

.0

SCI

0

2

5

1

0

38

122.2

9

.0

34.9

69.9

.0

JEL

1

1

3

1

0

38

101.4

7

1.6

67.4

.0

.0

TRI

1

2

5

1

0

44

76.4

7

.0

48.2

16.8

.0

ENG

2

1

0

1

0

25

100.4

5

3.4

44.3

.0

.0

SQU

7

2

2

0

0

69

18.4

3

3.3

18.4

5.6

.0

SER

1

2

1

0

0

25

36.4

2

.0

15.9

.4

.0

ARD

0

2

0.

0

0

13

32.2


.0

5.0

13.3

.0

CON

1

0

1

0

0

13

37.0

1

.0

.1

12.1

.0

MER

1

0

1

0

0

13

51.0


.0

11.3

5.0

.0

MUL

2

2

0

0

0

25

10.1


.0

2.2

3.5

.0

RAY

1

2

0

0

0

19

15.5


.0

.4

7.1

.0

SCM

1

1

1

0

0

19

27.7


10.7

8.0

.0

.0

SHR

2

0

1

0

0

19

31.5


.0

1.0

14.2

.0

TRG

0

1

1

0

0

13

39.4


.0

2.

10.0

.0

ZEI

4

2

0

0

0

38

10.9


.0

2.2

7.6

.0

Other fish







13.5

2





MEAN CATCH OF ALL HAULS




517.1


31.4

533.1

574.1

.0

TOTAL NUMBER OF HAULS

16





1

9

6

0


GEAR: PELAGIC TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

POD

0

0

0

0

1

7

2730.0

62

.0

.0

546.0

.0

ENG

0

1

0

1

0

13

183.5

8

.0

73.4

.0

.0

CLU

0

1

0

1

0

13

150.9

7

.0

51.2

9.2

.0

JEL

1

3

3

0

0

47

43.1

7

.0

26.8

.5

33.0

TRI

2

3

1

0

0

40

44.4

6

.0

36.5

11.6

5.2

MYC

0

0

1

0

0

7

156.8

4

.0

.0

.0

31.4

SQU

2

1

2

0

0

33

38.9

4

.0

32.3

1.2

5.4

CAR

2

2

0

0

0

27

9.7

1

.0

.7

4.9

2.1

SCM

3

0

0

0

0

20

6.8

1

.0

4.1

.0

.0

SER

0

1

0

0

0

7

22.8

1

.0

4.6

.0

.0

Other fish







.5

0





MEAN CATCH OF ALL HAULS




293.8


.0

230.8

573.7

76.9

TOTAL NUMBER OF HAULS

15





0

5

5

5


Summary of catches from stn. 48 to stn. 116, Cape Verde - Bissagos Is., May 1981

GEAR: BOTTOM TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

BAL

1

4

2

2

3

55

1269.8

48

13.9

2153.0

.0

.0

JEL

1

1

2

3

1

36

690.3

17

455.1

.0

20.7

.0

POD

3

4

2

2

1

55

173.5

7

165.6

13.7

.0

.0

CAR

3

6

3

5

0

77

120.1

6

69.2

106.2

156.0

.0

SCI

1

3

1

1

1

32

185.0

4

107.6

.0

1.2

.0

SPA

1

2

4

1

1

41

147.0

4

46.0

61.1

114.1

.0

PLN

5

3

2

1

0

50

71.9

3

64.4

2.6

.0

.0

CLU

4

5

4

0

0

59

40.7

2

43.5

.2

1.7

.0

DAC

2

2

1

1

0

27

90.0

2

.3

76.5

.0

.0

ENG

1

0

0

0

1

9

309.9

2

51.3

.0

1.3

.0

ARD

1

4

2

0

0

32

51.7

1

30.2

.0

.0

.0

RAY

3

1

0

1

0

23

56.5

1

23.1

.0

1.5

.0

SPH

1

2

0

1

0

18

76.1

1

25.4

.0

.0

.0

Other fish







39.3

2





MEAN CATCH OF ALL HAULS




1445.3


1135.6

2459.9

317.0

.0

TOTAL NUMBER OF HAULS

22





12

7

3

0


GEAR: PELAGIC TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

ENG

1

0

1

0

4

23

1109.7

41

.0

.0

665.5

.6

BAL

2

4

0

0

1

27

442.2

19

4.1

383.4

1.2

.0

CLU

3

4

5

1

1

54

171.3

15

387.7

84.1

17.1

.8

CAR

6

4

3

2

0

58

76.0

7

7.1

81.6

14.8

77.9

POD

3

1

3

2

0

35

113.9

6

28.8

111.4

1.8

.0

SPH

1

4

4

0

0

35

74.1

4

6.1

72.1

6.6

.0

STR

0

0

0

1

0

4

241.2

2

.0

30.2

.0

.0

BRE

0

1

1

0

0

8

99.4

1

.0

3.8

16.8

.0

CRU

2

0

1

0

0

12

43.3

1

.0

.0

.0

32.4

SYN

3

1

1

0

0

19

29.1

1

.0

.0

14.5

.0

Other fish







14.8

2





MEAN CATCH OF ALL HAULS




618.7


458.0

780.5

744.1

142.0

TOTAL NUMBER OF HAULS

26





4

8

10

4


Summary of catches from stn. 275 to stn. 311, Bissagos Is. - Cape Verde, Sept. 1981

GEAR: BOTTOM TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

DAC

0

0

0

0

1

7

5334.0

29

.0

1333.5

.0

.0

BAL

0

3

3

1

2

60

224.7

11

44.9

393.3

.0

.0

POD

1

4

3

0

1

60

222.1

11

180.5

46.4

.0

.0

SCI

1

1

0

0

2

27

500.7

11

200.3

.0

.0

.0

SPA

1

2

1

1

1

40

293.5

9

9.1

99.9

1270.4

.0

CAR

4

3

4

1

1

87

96.5

7

87.6

75.3

103.6

.0

PLN

1

1

2

0

1

33

174.0

5

87.0

.0

.0

.0

CLU

0

6

3

1

0

67

66.6

4

62.4

2.7

33.6

.0

SHR

2

0

0

0

1

20

246.0

4

74.4

.0

.0

.0

ARD

5

0

2

1

0

40

105.1

3

63.0

.0

.0

.0

MIS

0

0

2

0

0

13

103.3

1

20.7

.0

.0

.0

MUL

1

2

1

0

0

27

45.6

1

1.8

41.0

.0

.0

SER

2

1

1

0

0

27

28.9.

1

3.7

19.7

.0

.0

SPH

1

1

1

0

0

20

34.1

1

10.2

.0

.0

.0

SQU

3

1

1

0

0

33

30.4

1

4.5

26.6

.0

.0

TRI

0

1

2

0

0

20

59.8

1

17.9

.0

.0

.0

Other fish







32.1

2





MEAN CATCH OF ALL HAULS




1248.7


901.3

2062.0

1470.0

.0

TOTAL NUMBER OF HAULS

15





10

4

1

0


GEAR: PELAGIC TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

ENG

0

0

0

0

1

5

12000.0

51

.0

.0

.0

12000.0

BAL

2

1

2

0

1

27

1304.1

33

.4

3.0

1948.8

.0

CLU

4

2

5

1

0

55

74.5

4

64.2

42.3

.0

.0

CAR

4

5

1

1

0

50

61.8

3

18.4

59.0

.4

.0

DAC

2

0

0

0

1

14

248.5

3

.0

.4

185.5

.0

ARD

2

0

0

1

0

14

157.9

2

.3

.1

117.6

.0

POD

1

0

1

1

0

14

123.2

2

46.2

.0

.0

.0

SHA

0

1

1

1

0

14

128.3

2

45.2

2.6

.0

.0

SCM

1

2

0

1

0

18

71.5

1

.3

4.3

61.3

.0

Other fish







4.1

0





MEAN CATCH OF ALL HAULS




1079.5


179.3

117.3

2315.0

12000.0

TOTAL NUMBER OF HAULS

22





8

9

4

1


Summary of catches from stn. 426 to stn. 472, Cape Verde - Bissagos Is., Feb. 1982

GEAR: BOTTOM TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

CAR

4

1

1

0

3

82

267.0

25

2.7

364.3

178.6

764.0

APO

0

0

0

0

1

9

2040.0

21

.0

.0

680.0

.0

SPA

0

0

4

0

2

55

345.4

21

.0

408.1

223.7

176.6

SCI

0

2

2

0

1

46

234.3

12

288.9

.0

5.3

.0

PLN

2

1

0

1

0

36

73.5

3

73.5

.0

.0

.0

ARD

1

1

2

0

0

36

40.8

2

40.8

.0

.0

.0

JEL

0

0

1

0

0

9

174.0

2

43.5

.0

.0

.0

POD

2

2

2

0

0

55

33.1

2

31.1

24.7

.0

.0

SQU

2

3

1

0

0

55

25.6

2

5.6

33.5

6.0

12.6

TRG

0

0

2

0

0

18

97.2

2

.0

20.8

44.0

.0

CEN

0

0

1

0

0

9

120.8

1

.0

.0

.0

120.8

CLU

0

1

2

0

0

27

42.8

1

32.1

.0

.0

.0

DAC

0

1

0

0

0

9

46.0

1

.0

15.3

.0

.0

OPD

0

0

1

0

0

9

84.0

1

.0

.0

28.0

.0

RAY

2

0

1

0

0

27

22.8

1

2.1

.0

20.0

.0

SCR

0

2

0

0

0

18

32.5

1

.0

.0

14.7

21.0

SHR

2

0

1

0

0

27

21.3

1

15.5

.0

.7

.0

TRI

2

2

0

0

0

36

16.0

1

16.0

.0

.0

.0

ZEI

0

2

0

0

0

18

44.2

1

.0

.0

16.0

40.4

Other fish







16.0

1





MEAN CATCH OF ALL HAULS




888.1


563.1

886.0

1227.7

1176.0

TOTAL NUMBER OF HAULS

11





4

3

3

1


GEAR: PELAGIC TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

BAL

0

3

0

0

1

36

623.5

61

.0

15.6

1200.0

.0

DAC

1

0

1

1

0

27

224.2

17

.8

111.8

.0

.0

POD

2

1

1

1

0

46

86.9

11

4.8

70.8

.0

.0

CLU

1

0

0

1

0

18

117.4

6

1.5

38.6

.0

.0

ENG

0

1

1

0

0

18

59.7

3

59.7

.0

.0

.0

STR

2

2

0

0

0

36

8.5

1

.6

5.4

.0

.0

Other fish







8.5

2





MEAN CATCH OF ALL HAULS




371.1


84.1

252.3

1200.0

.0

TOTAL NUMBER OF HAULS

11





2

6

2

1


Summary of catches from stn. 48 to stn. 151, Bissagos Is. - Sierra Leone, May - June 1981

GEAR: BOTTOM TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

BAL

0

2

0

3

11

64

1469.8

73

64.3

1188.2

342.4

.0

CAR

3

5

3

2

1

56

106.5

5

24.6

64.0

88.0

.0

SPA

2

5

3

2

1

52

122.3

5

14.6

45.2

336.0

.0

POD

5

1

5

3

0

48

119.1

4

36.1

67.6

.0

.0

DAC

2

4

1

1

1

36

122.0

3

9.3

55.5

3.2

.0

CLU

3

3

3

0

0

36

52.8

2

72.4

7.7

20.0

.0

JEL

0

1

0

2

0

12

151.1

1

.0

23.9

.0

.0

MUL

1

2

1

0

0

16

44.3

1

.8

9.2

.0

.0

PLN

5

3

1

0

0

28

28.7

1

24.8

5.4

.0

.0

SCI

0

2

3

0

0

20

70.2

1

36.6

10.8

.0

.0

SER

0

3

1

0

0

16

39.3


.0

6.4

17.4

.0

SPH

1

4

2

0

0

28

35.5


4.2

12.2

.0

.0

SQU

2

6

I

1

0

40

45.8


3.1

22.8

6.4

.0

TET

4

2

1

0

0

28

23.5


10.2

6.5

.0

.0

Other fish







20.2






MEAN CATCH OF ALL HAULS




129.6


329.8

1544.0

830.0

.0

TOTAL NUMBER OF HAULS

25





4

19

2

0


GEAR: PELAGIC TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

BAL

3

2

1

1

3

36

2151.1

92

.0

1263.3

4.3

.0

CLU

2

5

1

1

0

32

79.7

3

5.1

31.4

22.4

.0

ENG

0

2

2

0

0

14

93.0

2

43.4

10.7

18.3

.0

CAR

6

2

2

0

0

36

20.8

1

2.9

11.2

1.8

.0

SPH

4

0

1

0

0

18

22.9

1

.0

.8

12.7

.0

Other fish







14.1

1





MEAN CATCH OF ALL HAULS




832.8


112.0

1323.2

86.8

9.0

TOTAL NUMBER OF HAULS

28





1

17

8

2


Summary of catches from stn. 268 to stn. 274, Guinea-Bissau south of Bissagos Is., September 1981

GEAR: BOTTOM TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

BAL

0

0

0

1

2

100

644.2

51

.0

803.7

325.2

.0

DAC

0

0

0

0

1

33

874.8

23

.0

.0

874.8

.0

CAR

0

0

0

2

0

67

352.2

19

.0

352.2

.0

.0

SPA

0

0

1

0

0

33

135.3

4

.0

67.6

.0

.0

SPH

0

2

0

0

0

67

40.9

2

.0

40.9

.0

.0

LET

0

1

0

0

0

33

38.4

1

.0

19.2

.0

.0

Other fish







4.2

0





MEAN CATCH OF ALL HAULS




1260.0


.0

1290.0

1200.0

.0

TOTAL NUMBER OF HAULS

3





0

2

1

0


GEAR: PELAGIC TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

BAL

0

0

0

1

2

75

3260.3

86

.0

455.4

4435.1

.0

DAC

0

0

0

1

1

50

818.7

14

.0

.0

818.7

.0

Other fish







2.4

0





MEAN CATCH OF ALL HAULS




2857.0


.0

456.0

5258.0

.0

TOTAL NUMBER OF HAULS

4





0

2

2

0


Summary of catches from stn. 426 to stn. 472, Bissagos Is. - Sierra Leone, February 1982

GEAR: BOTTOM TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

BAL

1

0

0

0

1

33

1800.8

73

.0

1800.9

.0

.0

JEL

1

0

1

0

1

50

305.7

19

457.5

.0

2.0

.0

POD

0

2

0

1

0

50

83.3

5

105.8

6.3

25.8

.0

DAC

0

1

0

0

0

17

46.0

1

.0

23.0

.0

.0

SPA

1

1

0

0

0

33

14.3

1

.0

11.3

6.1

.0

Other fish







19.2

2





MEAN CATCH OF ALL HAULS




826.4


597.5

1846.1

36.0

35.4

TOTAL NUMBER OF HAULS

6





2

2

1

1


GEAR: PELAGIC TRAWL

% incidence in tot. no. of hauls

Mean c. of c. >1 kg

% of total catch

MEAN CATCH OF ALL HAULS REFERRED
TO BOTTOM DEPTH STRATA

FAMILY

CATCH GROUPS (kg/h)

1 -9

10 -49

50 - 199

200 - 499

>500

<20 m

20 - 50 m

50 - 100 m

>100 m

BAL

0

0

2

1

3

35

2759.0

94

.0

854.2

4000.0

216.5

CLU

1

1

0

1

0

18

124.2

2

182.2

.9

.0

.0

ENG

0

0

2

0

0

12

116.8

1

116.8

.0

.0

.0

SHA

1

0

1

0

0

12

52.4

1

50.4

.4

.0

.0

Other fish







16.8

1





MEAN CATCH OF ALL HAULS




1032.4


392.0

868.2

4007.1

234.9

TOTAL NUMBER OF HAULS

17





2

9

2

4


"DR. FRIDTJOF NANSEN" MAY 1981 - MARCH 1982 FISHING STATIONS MAURITANIA - SIERRA LEONE


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