CM_1983_G_34.pdf (3.524Mb)

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PRELIMINARY AT BEAR ISLAND

Kj 11

Inst tute of

1870 N

011

1¹

ABSTRACT

This report

s s

trawl survey with

period 7 September

to

species in the area were mostly caught

year-class was Redfishes were bas s mentel catches.

INTRODUCTION The invest supplement

to

t

in the Barents

Se

the other demers the invest

acoustic

s

and Smedstad, 1978) stock in

the

area

cod with acousti

s

t

ts t. i

.5

^cm

1 2

ttom

ars

out as an

s

2

1981 (Randa and Smedstad, 1982) and in 1982 were carried out as stratified bottom trawl surveys.

MATERIAL AND METHODS

The survey was carried out by two vessels,

RV

"Michael

Sa.rs

and the commercial trawler MTr "Vikheim". The survey

starcet

out from Hammerfest on 7 S tember 1982 and was

October. Both vessels used a Campelen 1800 meshes with rubber bobbins and codend mesh size of 35 mm.

d 9

res were 80 m. The trawl was towed for 3 n.miles at a speed of 3 knots. The trawl stations are shown in Fig. 3.

t to

trawling

RV

"Michael.· Sars" ma.de hydrographical observations using a CTD-sonde (Fig. 2).

The survey was designed as a strat

d random

trawl s The investigated area was divided

45

strata based on

boundaries and geographical areas (Fig. 1). The following depth intervals were used: 0-100 m, 100 200 m, 200 300 m, 300-400

m

and >400

^m.

The total

area "vJas

divided

two

sub-areas. The area north

of

76°N consists of

the strata

1-22 and the southern area

of

the strata 23-45. The al cat of trawl hauls and the statistical calculations are

des d

in last years report (Randa

and Smedstad, 1982).

The only difference from last years report is that the indices s year are given as swept area indices while last year used mean catch indices were used.

RESULTS Hydrography

The temperatures in 100 m and at the bottom are shown in Fig. 4

and 5. The temperatures in the Storfj ordchannel seems to be

somewhat lower than at the same time in 1981, while the tempe-

ratures in the Bear Island channel seems to be somewhat higher.

·3

Cod

Cod was caught in all strata except strata 2, 21 and 42. In the northern area the cod was very scattered and no dense concentrations were found (Fig. 6). The largest catches here were in stratum 12 which had a mean catch of 69 cod per trawl hour. In the southern area the greatest concentrations were found in strata 24, 25 and 32 with mean catches of 202 to 295 specimens per trawl-hour. ^By weight the biggest catches were taken in strata 32 with a mean catch of 305 kg per trawl·-hour.

In 1981 concentrations of 1979

year-

class we·re found in stratum 42. In 1982, however, no fish were found in this stratum. The 1979 year-class was mainly found in strata 24, 25 and 32, which means that the 1979 year-class this year prefer depths between 100 and 200 m instead of the very shallow water where they were found last autumn. Fig. 13 and Tables 3 and 4 show the age distribution of cod in different depth zones and in different areas for 1981 and 1982.

The age distribution of 1981 given in this report is slightly different from the distribution given in last years report because there were some errors in the age-length key used last year. This shift of the 1979 year-class to deeper water are seen from the figure 13 and in the tables 1 and 2. It is also seen that the older fish tends to prefer deeper water than the younger ones. Fig. 13 H shows that the total year-class distribution in the stock is the same in 1982 as was found in 1981. As in 1981 the 1979 year-class was found as the most numerous. The 1981 and

1980

year-classes were found to be poor, and of the older year classes the 1975 year-class is still the most numerous.

Table 5 indicates that there has been no reduction in the younger year-classes from 1981 to 1982. However, the confi- dence limits for these year-classes, and especially the 1979 year-class, was greater in 1981 (in the order of 1007o) than in 1982. For fish 6 years and older a reduction is observed.

This reduction is caused both mortality and migration.

amoun 9 %

t

7 ) .

9%

7

1.: of

ates t

cone ( . 7

most numerous concentrat

(Table 2).

15

^sho~1s smaller

m s is

f also

s

20

20 tot

1

4

1

In

rn area

strata 2 ,

10, 12, 13 s

d

from 0.3

in 11)

was more numerous 80

of

catches were

trata

mean catches

d

to

causes an 1981

to

1982.

reduced from 1981 to 1982

ing redfish

c s at

ax In

the

northern area

^c: tJ •

i

arnou.nt

to

wei

the

correspond:Lng

in the southern area, and

~"1ere

found between 200 300 m

are

northern area

00 m~ but

by

we

than 400 m in

stributions change dominating

down

to

cm

dominat

ement

with last years

.c •

.ll.

in the

st bo

eas

wi depth.

300

m

le

than 300

result, The

rn area are

5

smaller than the fish in the southern, and that

i t

is fish smaller than 35 cm that dominate in the samples.

Sebastes marinus amounts to about 4% of the total re sh index in numbers and about

7%

by weight.

98%

of

S

is re- corded in the southern area.

The

length distributions of S.marinus are also changing with depth (Fig. 14)

The trawl index of S.marinus

has

creased from 1981 to 1982 while the index for S.mentella

has

increased in the same period

(Tables 6 and 7).

Greenland halibut

Greenland halibut was caught in all strata deeper than

200

m.

Some small Greenland halibut were taken between 100 and

200

m.

The greatest catches were taken in Kings Bay, Isfjord channel and in the Storfjord channel (Fig. 8).

Fig. 17 shows that the proportion

of

larger fish increases with depth, and that the

fish in

the southern area are larger than in the northern. This is seen

from

the trawl indices. The indices by number are

almost

equal in the two areas, while

the

.weight index is ater in the southern area than in the northern (Tables

1 and 2). Also

the trawl indices for Green- 'land halibut show

an

increase from 1981 to 1982 (Tables 6 and

7) •

Blue whiting

Blue whiting was mainly caught in the southern area. The catches increased

with depth

(Tables 1 and

2),

and it was·

mainly fish between 30 and 40 cm

in

the catches

(Fig.

12).

Shrimps

Shrimps were caught

in all

strata deeper than

200 m. The

greatest catches

were

Bay, in Isfjord channel and

north of

Sjubrebanken, in Kings

Storfjord channel (Fig. 10). In

6

the northern area the trawl index was highest between 200 m and

300 m~ while was

highest between

300 tn

and

400 m

in the southern (Tab 2).

From 1981 to 1982 the trawl index increased with about 38%

(Table

7).

Catfi

s

Catfishes were caught in small numbers in the whole area. Jelly

cat was the

most numerous (Table

1).

Both

jelly cat and

smaller

catfi were most

numerous between

100

and

200 m ~1hile

cat sh was caught in greatest numbers between 200 and 300 m.

For all three spe s the trawl indices increased from 1981 to 1982, except for the index

by

number of smaller catfish (Table

6

and

7).

REFERENCES

Dalen,

.J.,

R<t>rvik,

C~J. and

Smedstad, O.M. 1977.

Bunnfiskunder-·

s~kelser

ved

Bj~rn~ya

og Vest-Spitsbergen

h~sten

1976. Investigations on demersal fish at Bear Island West-Spitsbergen in autumn 1976 . _F_i __ __

Hav 77 3): 29-51.

Dalen,

.J.

and Smedstad,

O.M,.

1978. Bunnfiskunders()')kelser ved

Bj~rn~ya

og Vest-Spitsbergen

h~sten

1977.

Investi~

gatiorts

on demersal fish at Bear Island and West- Spitsbergen in autumn 1977 . Fisken Hav., 1978(3):

1-14

Randa, K. and Smedstad, O.M. 1982. The norwegian groundfish survey at Bear Island and West-Spitsbergen in the autumn 1981. Coun. Meet. int. Coun. Explor. Sea,

Mimeo. .

Table 1. Stratified trawl indices on numbers for different depths and areas in 1982.

North

South

0-100 100-200 200-300 300-400 >400 TOTAL 0-100 100-200 200-300 300-400 >400 TOTAL TOTAL Cod 471 3 145 294 137 93 4 140 10 050 21 890 5 965 1 986 1 569 41 460 45 600 Haddock S.marinus Ssmentella 101 46 0 1 550 34 090 33 5 21 96 6 393 17 0 17 060 59 190 40 2 204 56 76 0 0 2 273 254 68 83 900 58 410 73 870 218 500 277 600 5 679 6 5 959 520 82 71 11 790 928 11 990 984

Greenland halibut 2 191 3 715 3 085 5 942 12 940 0 131 2 427 2 922 7 706 13 070 26 000 Long rough dab 673 5 346 22 750 3 161 2 264 34 190 5 371 164 900 89 720 21 010 8 212 336 100 370 300

Blue whiting ₀ 27 20 241 249 537 0 6 13 010 5 941 8 275 27 230 27 760

Jelly cat ₀ 0 16 5 9 30 0 519 419 255 17 1 360 1 391

Catfish 10 526 662 169 159 1 527 0 312 453 134 179 1 082 2 609

Smaller catfish 0 38 132 43 66 279 222 948 194 74 14 1 452 1 730

...,]

Table 2 .. Stratified trawl indices on weight for different depths and areas in 1982.

North

South

0-100 100-200 200-300 300-400 >400 TOTAL 0-100 100-200 200-300 300-400 >400 TOTAL _TOTAL Cod 150 1 094 1 052 448 604 3 348 3 171 25 870 14 620 7 601 6 611 61 180 64 530 Haddock S.marinus 0 ₊ 5 4 28 + 11 0 20 + 63 5 + 0 244 15 1 506 32 2 562 + 220 106 4 325 496 4 388 502 S.mentella 7 311 1 302 l 430 6 753 9 804 0 325 10 160 12 690 26 670 49 830 59 640 Greenland halibut 0 136 1 937 1 152 3 325 6 550 0 39 2 850 2 650 10 120 15 660 22 221 Long rough dab 74 528 1 594 292 370 2 858 1 866 24 540 11 020 2 101 1 603 45 510 48 370

Blue whiting 0 11 6 68 73 158 0. 46 3 669 1 864 2 163 7 741 7 899

Jelly cat _{0 0 29 39}

61 130 0 5 223 2 730 2 531 1 825 12 590 12 720

Catfish 15 494 532 219 99 1 359 0 376 697 350 426 1 849 3 209

Smaller catfish 0 77 189 51 47 363 92 4 443 561 49 ^{'"7 I} 6 425 6 788

Shrimps 0 1 916 12 920 5 001 4 981 24 810 0 8 997 19 790 26 720 13 270 68 780 93 590

3. Stratified trawl indices on numbers for different ages of cod in 1981.

-

Age

Depth 1 2 3 4 5 6 7 8 9 10+ TOTAL

4-l 0-100 ⁺ 0.4± 0.4 0.1±0.1 ^{+ + + +} 0.0 0 .. 0 0.0 0.5± 0.6

0 100-200 0.0 0.1± 0.1 0.1±0.1 ^{+ +} 0.2±0.2 0 .. 1±0.1 ⁺ + + 0.6± 0.4

..Cz 200-300 ^{+ + + + + + + + +} + 0.1± 0.1

-Wo lo-11..0 300-400 0.0 0.0 ⁺ 0.0 ⁺ 0.1±0.1 + + + + 0.1± 0 .. 1

z Or- _{>400 0.0} 0.0 ⁺ 0.0 ^{+ + + + + +} 0.1± 0.2

TOTAL ⁺ 0,5± 0.5 0.2±0.2 0.1±0.1 0.1±0.1 0.3±0 .. 2 0.1±0.1 0.1±0.1 ^{+ +} 1.5± 0.7

l.H 0-100 ⁺ 20.1±34.8 8 .. 1±7.1 4.7±4.0 0.5±0 .. 3 0 .. 4±0.3 0.1±0.1 + + + 33.9±41.9

0 100-200 0.1±0.1 1.6± 2 .. 6 0.5±0.7 0.3±0.2 0 .. 1±0.1 0.8±0 .. 7 0.6±0.6 0.1±0.1 0.1±0.1 0.1±0.1 4.3± 3 .. 5 -9z 200-300 0 .. 0 ⁺ 0.1±0.1 0.2±0.2 0 2±0e2 2.1±2.7 1.6±2.3 0.4±0 .. 4 0.2±0 .. 2 Oa2±0.2 5.0± 6.0

.,uO

::J\..0 300-400 0 .. 0 0 .. 1± 0.2 0@1±0.1 0 .. 2±0 .. 1 0.2±0 .. 1 1.3±0.6 0 .. 8±0.4 0.1±0.1 ^{+ +} 2.9± 1.5

gr-

>400 0 .. 0 0.0 ⁺ 0.1±0.1 0 .. 2±0 .. 1 1 .. 1±0.5 0.6±0.2 ^{+ +} + 2.2± 0.8

TOTAL 0.1±0.1 21.7±34 .. 8 8 .. 8±7 .. 0 5.5±4.0 ^1~2±0.,4 5.8±2 .. 9 3.7±2.5 0.6±0.6 0 .. 4±0.3 0.3±0.2 48.3±42.5 CO

TOTAL 0.1±0 .. 1 22.2±34 .. 7 9.0±7 .. 3 5.5±4 .. 0 1.3±0.5 6.1±3.0 ^3~8±2.4 0.7±0.6 0.4±0.3 0.4±0.3 49 .. 8±42.4

Table 4. Stratified trawl indices on numbers for different ages of cod in 1982.

-

Age

Depth 1 2 3 4 5 6 7 8 9 10+ TOTAL

0-100 + 0.2±0e4 0.2± 0.3 + 0.0 0.0 0.0 0.0 0.0 0.0 0.5± 0 .. 9

1.!-1

100-200 0.5±0.6 1.7±2.5 0.8± 1.0 0.1±0.1 0.0 0.0 OeO 0.0 0.0 0.0 3.1± 3.8

0

..c:z 200-300 Oo1±0.1 0.1±0.1 + + + + ⁺ + + + 0.3± 0.2

~0 )..1\.0 300-400 + + + + + + + 0.0 0.0 0.0 0 .. 1± 0.1

or- >400 0.0

:z 0.0 + + + + + + 0.0 0.0 0.1± 0.1

TOTAL 0.6±0 6 2o0±2.6 1.0± 1.1 0.2±0.1 Oo1±0.1 0.1±0.1 0.1±0.1 + + + 4.1± 3.9

0-100 0.4±0.3 0.9±1.1 7.6± 9.2 1.1±1.5 + 0.0 + 0.0 0.0 0.0 10.0±11.9

4-1 0 100-200 0.5±0.8 1.0±1.2 11.7± 8.5 6.1±5.6 1.2±0.9 0.5±0 3 0.7±0.4 0.1±0.1 + + 21.9±15.3 ..c:z 200-300 0.1±0.3 0.1±0.1 1.7± 2.1 1.7±1.7 0.9±0.7 0.4±0.3 0 .. 7±0 .. 4 0.1±0.1 o.1±o.1 + 6.0± 4--5

~0 :::S\.0 300-400 + + 0.1± 0.1 Oo1±0.1 0 .. 3±0.2 0.5±0.3 0.8±0.3 0.1±0.1 0.0 OeO 2.0± 1.0

or- >400 0.0 0 0 0.1± 0.1 0.1±0.1 0.3±0.2 0 .. 4±0.2 0.7±0.3 + 0.0 0.0 1.6± 0.5

Ul

TOTAL 0.9±0.9 2.0±1 .. 6 21 .. 2±12o8 9 .. 2±6.2 2 .. 8±1.1 1.8±0 .. 4 2.8±0.7 O.J±Oo2 O.l±Oel 0 .. 1±0.1 41 .. 5±20.1

1..0

TOTAL 1 .. 5±1.1 4 .. 0±2.9 22 .. 2±12 .. 9 9.3±6.1 2 .. 8±1 .. 1 1.9±0 .. 5 2 .. 9±0 .. 8 0.4±0.1 0.1±0.1 Ool±O.l 45 .. 6±20 .. 4

Table 5. Stratified trawl indices on numbers for different year-classes of cod in 1981 and 1982.

Year-classes

Year of 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 TOTAL investigation

1981 0.1 22.2 9.0 5.5 1.3 6.1 3.8 Oo7 Oo4 0.4 49.8

1982 1.5 4.0 22 2 9.3 2.8 1.9 2.9 0.4 0.1 0.1 45.6

Table ⁰ Stratified trawl indices on numbers for 1981 and 1982.

Year Number Cod Haddock Somarinus S.mentella Greenland rough Blue Jelly Catfish Smaller

of hauls halibut dab whiting cat catfish

North 1981 66 1 467 327 3 415 45 680 13 600 48 720 1 821 35 621 1 209

1982 70 4 140 56 204 59 190 12 940 34 190 537 30 1 527 279

J-i

South 1981 119 48 310 481 58 250 133 800 6 492 287 500 26 650 1 235 790 1 242 ^o.

1982 121 41 460 928 11 790 218 500 13 070 336 100 27 230 1 360 1 082 1 452 TOTAL 1981 185 49 770 808 61 670 179 500 20 100 336 300 28 470 1 270 1 411 2 450 1982 192 45 600 984 11 990 277 600 26 000 370 300 27 760 1 391 2 609 1 730

Table 7 .. Stratified trawl indices on weight for 1981 and 1982.

Year Cod Haddock S.marinus S.mentella Greenland Long rough Blue Jelly Catfish Smaller Shrimps

halibut dab whiting cat catfish

North 1981 3 156 942 453 11 030 3 645 4 125 400 30 1 032 643 17 060

1982 3 348 5 63 9 804 6 550 2 858 158 130 l 359 363 24 810

South 1981 73 270 988 10 230 31 510 5 794 40 770 4 968 9 427 1 054 3 764 50 650 1982 61 180 496 4 325 49 830 15 660 45 510 7 741 12 590 l 849 6 425 68 780 TOTAL 1981 76 430 1 930 10 680 42 530 9 439 44 890 5 368 9 457 2 086 4 407 67 710 1982 64 530 502 4 388 59 640 22 221 48 370 ⁷ 899 12 720 3 209 6 788 93 590

11

7D,

I

u

I •

·~

78 1

~V

77

...__..."""11""--.--- , -·• ·• ^{T • - • •}

..

'

^{12 16 20}

Fig. 1. The investigation area with the different strata. ¹

'.-..

() /

!I

' ' '

'_,\

. '

6' 6' 10' 12' 14° 16' 18' 20' 22" 24' 26'

80'1 ' ! I I I I I

l

^{~ I ( I I I I I I I: I ) 28' I I 30'}

I

376 z-._"--...;78 ~

jf"z382 .

7

79~394

\

ll

?tM I

I

1 i

77!l

~~~~·

~ I ,

1

r""·.397

^401z

389 "-...,// . /

02z

lr--z

\ 4 0 4 /

\ ~)~·v

I 409zLz-z • _{4 1 2 z -}^/

r

^L._i419 _z

LJ,s

~421 463

469 / z /~

4257~~-/ ^{; · "-.,.}

I

I

L.--·"

z44S z. t'

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1,

⁶⁶ / z 4 6 1

3 7 L z - - z - - t 437\tz -~->r 4JOQ~u7 r.. z -459,....-

~

^{ ~",· ~~-''-^{470~ z4'51.} ~

3 6 7 : - z -_~% (

r /

^~

~ ^{p 4 5 0} ~r-

~~z--ZL%362 ~ 436z( \ I \

u

~

~

I

7Gr.

1

_i

7L~

73.

360 X

~ ~

%'\ \

·~\\

n•j

71'

I

?ll:.;,'h-=s-=EP""". -. '"""10-0-C"'"T -,9-5-2 --S-T-.N-0-35_.7-·""'"t.!S

Fig. 2., Survey tracks and hydrographical stations taken by

RV "}1ichael Sg.rs" in 7 September· ~ October 1982.

1(~ .,.... -:--i-·r

. .,

80 ~

lO~

79 ~

76

30

77

30

.I

•\!

i

~ 3011

75

30

74

3ll

73

I

0

\ 0

0 '

I 0 o

0

0

I

0

0 0

0

0

1-' N

! f

I

₀ 10 Ill

Ill 0 0

0 0

Cl 0

1:1 0

0 Ill

D

0 0 0

0 IJ

Q

0 0

0

0 Ill

Ill

0

D

I

^{0 0 0 Ill}

=F"

^{I a c D oo 0} _~-^{ID ID} - - ^{0 0 0 0 0 iCI}

I I

20 24- 28

Fig. 3. BottC' trawl stations taken by RV uMichael Sars"

and MTr nVikheim" in the period 7 September-9 October 1982.

30 u 9 10 11 12 13 14 15 1~ 17 16 1L1,9__ r--===='1=========---... 7 B 9 10 11 12 13 14 15 16 17 16 19 ZO

~~~ ^f

1

8 0 1 ! - - - - t - - - + - -- - - 1 1 ' - - - - \ -

so~ :tl I JC\

30 30

; 79

3 4 ₃

'79 ^30,

. ( \\1

^' _]Oti I \ l 11'1~ IJI' "'t. 11

.))

I \ ----,--....,. ___f- I

'J i\\\\r:~1 ^)_A J . ^I

^7S

I .. I '-'I(~Jf l~t~l

^I

_{I ~}

"I ^{I .} r\:'13 ^I _I ^{r ,{J}

^{' I I I'..'.. 1'11 I I ..}

761

I

I ^{I ·. \~} \ . 7

r

7 ^I

I. I .f

₇₆₁ I 1

_{r r}

~~~

11

^-1

_· ^I

₁

(/o

^{o I}

^t

I I I /1 I

I

3101 I

30

75

1 I I I /. \I\ )

^J

I I/' 7'7/ I i 7sl I I .

^c

I 0/

^~~

^I I

~

30 ³⁰

\

i

74~

. 741

I I I ;

¹

't / ^I I I •(

30

1 I ^{~ 11 / ·} I \ ^~ 4 I · I

₃₀₁

_{I I}

l\2

I ^{I ., I f}

nl I I I I I I l

12 16 20 12 16 20 24. 28

Fig. 4. Temperature distribution in 100 m depth.

Fig. 5. Temperature distribution at the bottom.

30 7 8 9 10 1: ~2 '3 11. ~s 16 :; , :~ ·_9. -:, , , • ~ ~ • + __ 30 7 8 9 10 11 12 13 14 15 16 17 16 19 20

I =

I

8011--;-f---1 ( 80t---r---~---¥~--

30~ I \. I - ~ \ l 11 i I "\ I I

-0

79~

I'

(/ ^I ~ ~

ffi ri

~

30 30

76 78

30 30

"

77 11rr _r ·~d ~ ~I I I I I !-'

~

76 (6~---~---+--~----~~~~~---~---T---~

~I

³⁰

75

"I

74

;;,vu 30

~

I

^I

I ^I

731 I i 7:i

12 16 20 = 21. 28 12 ii 2:. 28

Figo 6e Distribution of cod in the trawl catches (numbers Fig& 7o Distribution of Sebas~s mentella in the trawl

per hour) .. catches ·ers per hour) ^o

" s 9 • -. •• • ~ ·s 1b ·~ •t · 9 • ·

~~-,-T--r-~"'!"'"....,._...;..·~-~..r...-~- • ',-.,.: ,~"

80

i)

OQ>D;

~

50 I

"

t ~

79 I "'""'

lO

7Bi I I ::s::p=r 1 l I r

30

nl I '>ui=-\J\ \ "hs < I I I I

30 A

I

0

761 I -' 7 """""' I ^{~ /1} I I 7 .r ' I I I

30

30

7~r---~:---~---o+~---~~=---~---_J

__

^_j

30

73 ! -

12 16 • 20 2~ 28

Fig. 8. Distribution of Greenland halibut in the trawl catches (numbers per hour).

7 8 9 10 11 12 13 1~ 15 16 17 16 19 ~0

30" I I " - = - ' '·

ao1 1 1

n

30

791 \ '\J 0 i d pI

30

1a 1 1 .. \ .~Aft A' ^{A \ '} 1 r

30

nl I 'l ' , ' ~ ( I , I I I

761 I I I il -:=:;: , :7F- , / ! / I r

.o- 30

1s I I I ' k / J \ I /1 / /r I I r

30

74L-~---+---t~~~~c_--1-~~~'\~~

101 I I I r:r-=-= ^"~-=r '-

73~--~---~---~----~.-+---+---~--~

12 16 20 z;,. 28

Fig. 9.. Distribution of long rough dab in the tra¥Jl catches - (numbers per hour) •

J-1 U1

7 8 9 10 ..

·~~.-,---,... ^{:2 ... ".;. 14 ;5 16} l7 ^r 1=t=·,9_.J,G _

Ol

^I

E ~

eor- -t --

J•]

7 9 ~ _ J ' -""---'-' "j:; ^{I ~l,}

30

781 I'"-._~ ('f- ^I

30

n.~ ~

12 16

·i

I

L--i

I ^t

I t

·.~·

I I

I

^I t _~

,---.-(

I

^t

/~\

^I

^t

I ~ l ^{I t}

~ \I [

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2S

Figo 10. Distribution of shrimps in the trawl catches per hour)

=~ ~

40l

¹¹

3 0 L l - J . _20~

n~,

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w~

(l () 20

A

so,

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l3 20 10 so so

LENGTH IN CM

sol

so~

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. 11. Length distribution ^{of haddock~}

A: ^{Northern area, B: area,} C: The total areac

I :] ^:1<

^m

~ ~

^{1 I}

I()

oil

ol • ^{1 • ' • 1 •} 1 ...--,

o ii3 20 50 -<G se

LaiBTH IN 0'1

, 12.. Length distribution of blue

0"'1

so

~

^"10

liJ 0..

20

50

~0

~

³⁰

·~ 20 iO

50

~0

~ 50 w

ffi

²⁰

0..

10

2

2

2

17

8 iO

AGE IN YEARS

AGE IN YEARS

10

AGE IN YEARS

0

~ 6 8 10

AGE IN YEARS

50

~0 t- 50

i

²⁰

tO

o~~~~~~~~~~~~·~

so

50

I :

to

2

s

m

AGE IN YEARS

G

o~~~~~~~~---~~~~---~.--~,

50 40

I :

iO

2 8 iO

ASE IN YEARS

H

.. 0 ~-I-A--..1Jiti¥~11,L-1-...JIIIII1~~---Y-I-..IIIIIi¥-.&-.111~ ... ^{-...ill . . . .}

2 4

s

AGE IN YEARS

8 to

Fig. 13. Age distribution of cod: A: 0 m-100 m depth, B: lOO.m-200 m depth~

C: 200 m-300 m depth, D: 300 m-400 m depth, E: Deeper than 400 m,

F: Northern area, G: Southern area, H: Total area. Filled columns: i981.

Open col~mns: 1982.

10~

n

• El ^I!

m:u~L

o o m 213 ro "10

A

LENGTH IN CM

:1

^B

213

0 lO 213 "'iO 5o 60

LENGTH IN CM

:Ln _:~

o 0 IO

lnn

213

^~

ro "10 ^' 50 ^{I GO}

[

^I

LENGTH IN CM

.:1 ^~

_ho~ ^{ro j}

^{L~ !I}

10 ~

0 l ' , k & ! l " i 0 5 0 0 lD LENGTH IN CM

0

E

0 -~ I 1 I I 111 ' 11 I I I

0 m 213 30 "10 50 sa

LENGTHINCM

=~ n

^F

2S...J

s: 213~ I

i :~~ ^.. n.IHn.~~. . . ,

I

o m 213 ro "'ii se se

LENGTH IN 01

G

o1 ₁¹¹ o₁11,11

111,11p

1 ,

1

(! iO 213 30 "10 SO GO

LENGTH IN CM

~ :1 ~~

^H

·:j , ^{,D n,O} ll,l.n,n , , ,

o 1a 213 ro "'ii 50 se

LENGTH IN CM

Fig .. 14G Length distribution of Sebastes marinus ..

(Legends as in Fig. 13).

50

"10

~ ⁵⁰

lf 213 10

A

oj 11111

11111_{1°• 1} ~

10 213 50 "10 50

(!

LENGTH IN CM so

40

~ ⁵⁰

n

^B

~ 213 IO

0 I ^{I (if} I f ' , · f ( ' , ' '· I i

0 !0 213 50 "'iO 50

LENGTH IN CM

e

:~

~ :

₁₀

s o1

0 lO 213 50 "10 50

LENSTHINCM

;~LJ· ~

i5S ^{s I}

o a 10 213 ⁵⁰

~

^"'iG

LENGTH IN CM 50

e

:~ ~ ~

^F

~ ^20j

~ :~~ ^I

~l .o,/l,_,o,O,D

^{o,n. ,}

50 2S t-213

~ IS

lf 10

o 10 20 ro -to 50 LENSTHINCH

G

:1

^{111,11111 111}II,Dpr-=-r-

m 213 m -to 50 0

LENGTH IN CM

o . 213

I

; E~ ~ ^I:: 2SLI I~

^H

~ ~j ,O.D,~ It~ O~n

^{(I tO} LENGTH IN CM ^{20 J. : 0 >O} LENGTH IN CM ^{' "}

'"~

Fig. 15. Length distribution Sebastes mentella.

(Legends as in Fig~

~ ...

(lO

~\

:n ^~ •

I ~

s 0 ³

LJlil' ~n- ~

20 ~ i50 ^ro 0 tO I LENGTH IN CH

25~

ffi

:1 ~nM

li to 11

~ ^I I I ^I

:Ln. ^{lJ, Jlo,o,o,c}

B

a to 20 ro -to ro

LENGTH IN Cl1

~

:j

os~

n (

I ~~U: ^nU/Inn

0 _{o tO} ' ₂₀

lUJ;1I4=~

_{i50 40 50}

LENGTH IN Cl1

i ~~ rrllu~ LD

CL tO~ .

~~

I

0 lO 20 30 40 50

LENGTH IN Cl1

~ ~j =~

CL {0

s

E

a I 1¹ ' • ' 1

1¹ ' • ' 1

1¹ •,cJ,C?, I

0 10 20 i50 40 50.

LENGTH IN CM

-10

m B

~~Lnfu~~ I:

^{(] 1 I} I I I ! I Ill!) I l l I 1111 I Z 1

0 tO LENGTH IN Cl1 0 20 -10 so

LENST!-1 IN CM

so

25~ os~

2 0 l J

^{G : 11 C}

I ^::~ I : . ·

₁₀

5 . 6

0

0 {() 20 li.[Dr-r--r-' ~

^{i50 ~ n}

~-

^{50 • , _ I} I • "'""'"""" •

0

l j i l l j i i i j l i ( I

~

_!e

:i

_tO

s

LENGTH IN 01

20

^-10 so so

LENSTH IN 01

D

0 f ;^{1 1}1¹ ' • ' 1

1¹ ' , ' 11¹ 1,' '•' ~,⁰1 ^(J l ₁1 l;f 'i' 11^! I 11 I 1 11 111 111 I ! 1

1n₀n₁₀₁ I ;

0 ^{() 20 i50 ~ 50 0 20 '10 so so

LENGTH IN 01 LENSTHINOl

2S

20

~ IS

~ 10 5

E

0 I • I 11111^1111111111i¹¹,D,c~

• l56 50

I ;:

2S 5

a

20

^{40 60 so}

LENSTH IN 01

F

0 1 ^{I I} ..,,11,11,11,11.' I,II;D ! • ' I I

0 20 40 so so

LENGTH IN CH

~~UL

0 20 LENSTH IN CH

H

40 60 so

LENGTH IN t:H

Fig. 16. Length distribution of long rough dab. Fig. 17. Length distribution of Greenland halibut.

(Legends as in Fig. 13). (Legends as in Fig. 13).

f-J

\.0