CM_1981_G_36.pdf (546.9Kb)

International Council for the Exploration of the Sea

C.M. 1981/G: 36 Demersal Fish Committee

ASSESSMENTS OF THE NORTH-EAST ARCTIC AND NORTH SEA STOCKS OF SAITHE TAKING INTO ACCOUNT MIGRATION

by

Tore Jakobsen

Institute of Marine Research

P.O. Box 1870, 5011 Nordnes-Bergen, Norway

ABSTRACT

Tagging experiments have shown that there is a substantial migration of young saithe from the Norwegian coast north of

62°N to the North Sea. Assessments of the North-East Arctic and North Sea Stocks of saithe were made assuming that all 1-4 year old saithe caught between 62° and 64°N would have recruited to the North Sea stock. The new assessments give a decrease in the level of recruitment to the North-East Arctic stock and an

increase to the North Sea stock. The exploitation of the North- East Arctic stock is close to F , whereas the North Sea stock

max

is subject to considerable growth overfishing. Reduction in the exploitation of young saithe between 62° and 64°N will benefit chiefly the North Sea stock.

INTRODUCTION

Migration of fish between areas assumed to represent different stocks is a problem both for stock assessments and fishery management. In the North Sea region, migration between the North Sea and adjacent areas is common, but in most cases the data do not giye a sufficient basis for quantifying the migra- tion. In stock assessments migration is therefore usually either ignored or the effect of i t is eliminated by assuming

that the fish in the areas concerned belong to the same stock.

Neither procedure is satisfactory if there in fact are two or more different stocks in the areas.

In the Saithe Working Group, assessments have been made assum- ing that there is one self-contained stock in Sub-areas I and II and another in Sub-area IV and Division IIIa (Anon. 1981).

However, recent tagging experiments have shown that there is a very substantial rnigration of immature saithe from part of the coastal area north of 62 N to the North Sea (Jakobsen 1978, o 1981). This is contrary to the results of tagging experiments in the same area in 1955-58 which showed a basically northward migration (Olsen 1959, Anon. 1965). The present migration

pattern may therefore be temporary. However, this pattern appears to have been stable at least for 10 years and clearly

introduces a bias in the assessments. Therefore, assessments of the North Sea and North-East Arctic stocks of saithe have been made using information obtained from the tagging experiments to revise the data bases and thus eliminating at least some of the bias caused by migration in the traditional assessments.

CHANGES IN THE DATA-BASES

The rate of migration of immature saithe from the Norwegian coast to the North Sea is very high just north of 62°N and then gradually decreases northward along the coast (Jakobsen 1978, 1981). From north of the Lofoten Islands (about 68°N) i t appears to be negligible. If the rate of migration bad been the same from the whole coastal area north of 62°N, i t might have been possible to estimate an emigration rate from the North-East Arctic. However, the fact that the rate of migration to the North Sea differs between different coastal areas precludes this possibility because the geographical distribution of immature saithe north of 62°N is not sufficiently well known.

Thus, i t is not known bow large proportion of each year class north of 62°N is found in the area south of 68°N from which there is a significant migration to the North Sea. If the

number of fish of each year class migrating to the North Sea had been known, the effect on the North Sea stock might have been calculated (Ulltang 1977) but this again requires an estimate of the emigration rate from the North-East Arctic.

An alternative approach to the problem is to assume that all or a given proportion of immature saithe caught in an area on the Norwegian coast north of 62° would eventually have migrated to the North Sea. The Norwegian statistics give landings separate-

o o

ly for the area between 62 and 64 N and also for the area between 64° and 67°Na The rate of migration to the North Sea from the latter area is substantial, but difficult to estimate.

It is clearly higher from the southern part of this area than from the northern part (Jakobsen 1978, 1981) and i t is not

certain that all the fish migrating southward will go as far as the North Sea. From the area between 62° and 64°N the rate of migration to the North Sea is very high and the low number of recoveries north of the tagging area also indicates that re- cruitment to the North-East Arctic spawning stock from this area is low.

Thus, from the assessments i t was assumed that all saithe of

o o

ages 1-4 caught between 62 and 64 N would eventually have migrated to the North Sea. This represents an overestimate of migration from that area. However, this was compensated for by not assuming any migration from areas further north. In view of the results of the most recent tagging experiments (Jakobsen 1981) this would seem to represent an underestimate of the migration. However, catches of young saithe between 64° and

67°N have genreally been only about half the level of catches between 62° and 64°N and the estimate of migration from the

southernmost area is therefore most important to the assesments.

The tagging experiments between 62° and 64°N have been carried out on predominantly 2-4 year old fish. The migration of 5 year old fish from the area is virtually unknown and as some of the saithe mature at this age (R~insch 1976), the 5 year old fish remaining in the area rnay join the spawning saithe coming from

l

the north, which also may contribute to the catch of 5 year olds in the area. The change in the data-bases was therefore restricted to catches of 1-4 year old saithe in the area bet- ween 62° and 64°N which was transferred from the North-East Arctic to the North Sea catch-at-age data base. This is equi- valent to extending the area of the North Sea stock north to 64°N as far as 1-4 year old saithe is concerned, and reducing the area of the North-East Arctic stock correspondingly.

The data bases were changed on1y back to 1970 because of in- adequate Norwegian catch statistics in earlier years. In addi- tion to the Norwegian fisheries, there has a1so been other fleets in the area with Germany (Fed. Rep. of) taking the highest catches. These inc1ude catches taken at the Halten

Bank, iae at about 65°N, which could not be separated from the others. However, the catches of 1-4 year old saithe are in- significant compared to the Norwegian ones.

For the assessments, also weight-at-age for ages 1-4 had to be adjusted because the young saithe caught in the area between 62° and 64°N on the average has a lower weight-at-age than the averages both for the North Sea and the North-East Arctic.

Input Fs in 1980 for age groups 5-14 were the same as used in the Saithe Working Group. For the age groups 1-4 the change in the catch-at-age data required a revision of input Fs. This was done by using the same principles as in the Working Group

assessments.

RESULTS

The input catch-at-age and results of the VPA are given in Tab1es l-6G The input F-values at 1-4 are lower for the North- East Arctic and higher for the North Sea stock than those used in the Working Group. The transfer of catches from one area to another do not,necessarily produce a corresponding change in F- levels. However, considering that immature saithe is heavi1y fished by purse seiners and to some extent trawlers on the

Norwegian coast between 62° and 64°N, i t seems reasonable to expect that the exploitation rate on the younger age groups is higher in this area higher in the rest of the North-East Arctic and also higher than in the North Sea. The change from the

Working Group assessments in the level of Fs for ages 1-4 in the historical series, i.e. increase in the North Sea and decrease in the North-East Arctic, seems to support this.

However, the traditional assessments ignore migration and

therefore do not give "true" levels of F and the comparison is not totally relevant.

The most striking difference from the traditional assessments is in the level of recruitment. For the North~East Arctic there is a reduction of 24% and for the North Sea an increase of 29%

in the average of the year-classes 1969-76. However, the sum of recruitrnent in the two stocks remains virtually the same. The spawning stocks are of course unchanged, all the input data to estimate them being the same as in the Working Group.

Yield calculations based on the 1980 exploitation patterns are shown in Fig. l. For the North-East Arctic stock F

80=0.95•F , max whereas in the Working Group assessment F

80=1.18•F . For the max

North Sea stock F

80=1.59•F compared to F

80=1.46•F in the

max max

Working Group. The implications of these assessments can be sumrned up as follows:

1. The present rate of exploitation in the North-East Arctic stock of saithe is close to F .

max

2. Regulation measures aiming at a further reduction of the exploitation (e.g. to F

0_

1) or an increase of the spawning stock will to a large extent have to be made effective north of 64°N ..

3. The North Sea stock is subject to considerable growth overfishing ..

4. Regulation measures aiming at a decrease in exploitation of young saithe between 62° and 64°N will benefit chiefly the North Sea stock.

REFERENCES

Anon. 1965. Report of the Coa1fish Working Group. Co-op. Res.

Rep~ int. Coun. Exp1or. Sea, A, 6: 1-23.

Anon. 1981. Report of the Saithe· (Coa1fish) Working Group 1981. Coun. Meet. int. Coun. Exp1or. Sea, 1981(G 9):

1-97.

Jakobsen, T. 1978. Saithe tagging experiments on the Norwegian

o o

coast between 62 N and 67 N, 1971-74. Coun. Meet.

inte Coun. Exp1or. Sea, 1978(G 33): 1-9.

Jakobsen, T. 1981. Pre1iminary resu1ts of saithe tagging experiments on the Norwegian coast 1975-77. Coun.

Meet. int. Coun. Exp1or. Sea, 1981(G 35): 1-25.

Olsen, S. 1959. Pre1iminary resu1ts of the Norwegian coa1fish taggings 1954-58. Coun. Meet. int. Coun. Exp1or. Sea, 1959(114): 1-7.

Reinsch, H.H. 1976. Koh1er und Steinkoh1er. Po11achius virens und P. po11achius. A. Ziemser Ver1ag, Wittenberg Lutherstadt. 1976.

U11tang,

Ø.

Exp1or. Mer, 37(3): 249-260.

---

ut 1 r: ^IHOUSAHOS

1Y lO 1Y71 1Y72 19]j 1 y 7 J, 1 9 7). 1.Y7o 19 77 1Y78 _1Y/Y 1Y8u

1 o o u u u ^(J o o 4B BO (J

2 i..B 1 5 2 81 8 11 7 2 1416 YOL. O 39381 21. l u l l 7 31 J:, Yl. O l/RO 11 l 'Il

.3 J7utB 384R2 2 8 s 04, 6ll7 us 21"' 71 49241 illl426 61211 .3~392 4/ut,S j 2 12 l

4 !i0i.,U6 52 YL. 6 .321.21 1Y9 61 .3.:>743 'i10[J 2 71 li. 2 8 5 32 2 11 61 l b ) .hl 2Jtj1,2

s ^1.3YE7 2 6961 2 y J 4 b 26911 1!>671 163rJb 7 ')i, 7 1 OH O 12476 1 i, 1 2 2 /IJ 66

6 16189 9 556 l 01 Bo 160J4 2 U4 l 9 J.J. 3 6 8712 2062 45~ 4L.u0 /')9)

7 5122 9592 5616 /114 12J48 7.308 .31d5 I..B2 1468 2YU1 Ju 11

B 7Y~O 2 901 3 ':>4/ 393.S J. b02 6789 3212 14 56 184~ Yo3 Zul.3

9 2':>01. 4J52 186~ 2811 3258 2 911. 26/9 1606 9 58 1J) 6 , 5)

lO 3o97 l19) 21L.O 2 61 o ^L 50) 7.3SO ^{, 7t_J.,} 963 976 _{4.3R til/!.}

, 1 1UY6 j 1.~6 122Y 15 65 l4J6 19.3/ 1U'I1 1.65 6 55 JuS t.2Y

1? l':> 7 1 3 Qj /Y 6 ., '11 1 l.. L. l. 1? L.') B:->2 ? I.L. 681 _{2 B 1 J,).3}

1.3 .)lJ JS4 J.31 X12 L. .52 L.':)I.J 4/:iY 2 11 ^2R4 16R 25J

1 4 276 232 ? 6 1 41..2 2 6.~ 26U l~ o ::.x 1'16 l22 2:.>2

,,.

1 ur A L 11.4 )l. 7 1 :> )2 Y.S 117i'.t.o 1 4 ')l. 7 tl JlbH/H 1L.?.)2':> 1/1.)~ y u 11Y17.5 Yo8'16 96l:SU 7 7071.1

Tab le 2. North Sea Saithe.

;l J ~l .... Al ·,.-," r' I l l 1>. 1 ) Ur... A~. A l Y S J ~ : ; l ( ,. J 'l t.J "l"t "s

---

ut l l ; lt1uL''lAhtJ!.

1YIU 1 y /1 l ':IlL 1Y/J l'tlL. l y 1) l y l u 1 y 11 l y l p 1Y/9 1 Y HIJ

' " ' CJ ^/'l~ l 1..,:)/ 4. L-2 ~ ji.J/U J, 1 c ^C\ lJ 2101 tYJ(., 1121 o~B

i ₅ l5'11:l'l _{i.J:)/Y 1UuvJ't} l Il 11 3ur.7u _{l u} J..I.'IIK l Dh 6't 11 l. 7 6 (J ::dl l~) t..j'<;?!., l. u 7 p, p .3/) l 3 1 o 1 .5u

'Y(, lj (J j j l l t, l ) YY 1 _o.!lifll 2 t. u (~~l. :>l. J Y y J.J(JR1 2i.Yii5 l. t o ) )

L H /l. J t.. )'t08t hi :.Ul .3YUI) L, Ull K ( 2l, l l (J ) l. ti l .) ) ~. 9 fi {, .H?03 21 )) l, 2lui.U

~ c, _l , ux (:.. 12jY1 _{j l(~} .3u 1 J 1 J J /'\l /1 ( l, 2JL?.c. 2 01'1? _hl)') c, 2L./?) i R {)) :dl.') h 1 ?lJ)Y) , .c, ) (l. ~ l) l, 1 1 2 <til.Zh _iJ i' t'J (J 11 lJ 'l~:,? ~l J ^j u~~ 11 12<;1i. 1, J, 6 FU. IJ , 57?.7 ^l?~ , l ti! 1 _12/:lt. oåfR _2c..t..1 '5 Yt.21 CJ _l, uU/ _221.

/'< 1 'f'Y 0 lufi2 J 1 l J 17YH ') (J? i' f\6)0 1., K ~. r) 2 Y O? 1U69 8/3 'Y 54

y o u o ^{1 t'.l)h} 1YU1 , ? tJ ( 1 .. 2 l 3 ( YY l'ltH j l, (, {, 707 _i.. iD IUJ

1 fl .3/6 l, 05 l 1 1 (J l u () ru." 11 ()LJ 1UCJR 11-l.'J) 736 _tcl? 54 'i

, ,

l } ,y )) l?o ? 61 IN ? ) L, l') 3 :H? l, 1 ~

.543 2Ju

, .! l i. i' 6 It>

,

1) .. 21 ^j 1 J,y 2 l 2 l 2) C.,b 1?Y , 08

1 d 1 jR i,

1 J l A l 18)ble 2Jr.33') li.) U31:l t. {,Hl i' Ui? 3l. ;>t, 6fUR J Yt> /.:,l Hlr J 1).) l y 1 11 (ly 1 1 1 ()y) 3 5

---

lY/O 1 y l 1 1'1/2 1 y IJ 1 y l l, , 91'; h'/6 l 'Til 19 18 1Y79 1 YR 0

1 o.uu u.uu l). (J u o.oo O. DU o.uu O.uO u.uu u.oo o.uo lJ.OU

} 0.02 0.02 0.01 0.02 0.0)

o.,

3 o. l 6 0.20 o. 2 y LJ.40 u .. ' 7 0.41 O.o2 0.41 o-~ s o •. .Sl u • .58

l, 0.40 0 • .56 0.26 U.Jt. 0.4J 0 • .5/ 0.42 0.1.1 0.22 u.JY 0.32

~ o. 2 3 0 • .38 o. 3) 0.37 0.4H 0 • .56 O.llS o. 2 l 0.32 0.22 0.29

6 O •. B 0.2.1, u. 2 4 0 • .5.5 U. 53 o. 2 ~ 0 • .53 0.35 u. 1')1 aJ. lB 0.1(1

7 0.22 Ll.33 o. 2 1 0.27 o. ^J, 5 0.39 0 • .50 .. 0.2 7 o • .{, 5 o. 1 8 u. 1 e

8 0.38 0.19 0.19 0.2.3 o. 2 9 0.4Y 0.28 0.20 0.18 O.ul u. lB

9 0.21. 0.37 o. 1 8 0.2.3 0.30 0.29 0.36 Ll.22 0.19 u. J ',l 0.18

1(1 O.j5 0.3~ 0.31 O.it1 0 • .3.5 0.37 0.221 0.21 O. 2 D o. ^{1 3 LI. lb}

11 o .1 9 0.57 0.31, o. ^J, o ()./, 2 0.46 D .2 9 o. u 0.22 Ll.UY u. 1 ~

12 o •. n ^{0 • .57 ll.7.B O • .:SB} o./',' 0.19 0 • .57 0.10 o. 21. u. ^11.. u. ^lb

l 3 o .2 6 o. 2 s o., .s 0.::>0 U.37 o .o 3 0.85 o., s U.16 u.uv u. 1 b

lt,. 0 • .50 0 . .5() U.3U 0 • .30 lJ. ~o o. ^l, u ^{(J.l, ()} 0.?.2 0.20 1J. lB l). l !:i

1 ) .. 0 • .50 0 • .3D o • ^.3u 0.30 U.3U 0.40 o .4 o 0.2?. u. 2 o u. l 8 u. 1 b

f c !l-1U),U 11.29 ^{l)~ 31} o. 2 ~ O.j1 u.t.u O.J6 ( ) . j / ll.?S 0.?5 d. 2) lJ • .? u

f ( ~-lLJ).,I.o l) . l p, o. 37 o. ^?.ll 0.3? u. t.) o.Jo O •. Hi 0.26 U.26 u.2l Ll • .?l

Tab le 4. North Sea Saithe.

v J .(l u .. l rUt'lJL A l l uh ANALY~J~

t l ~ "' l ,, I.l Hl/l< l ~l J l t

---

l't/0 h / 1 1.,7(' 1 y / j l." (i. l y 7;.. 171/b 1'Y 71 1971\ lY/9 1 Y Hu ~

u.uu LJ.LlU u.uu u. u..:' U.lll U. dU U . l , O [J. o l U.01 u.u1 u. Uu

i u.uo Ll.1i' u., ^(J U.tl U. li o.n u ^.l~ o.? ^Cl u.31 o.~ 1 u. n

j l). 1 R U.Jf _ll.~" l). ) i, u. ^l') !J.i.t. l . l i ) D. i.l, u ^{.i, 6 il . l 7 u • .(,)}

l, _~ o U.)b U.jk l). l.s u. U.Jb u.

i.,

l l). l. k U.i'C,. u.? y l). j ( u.~u ll. (,LJ d •. 11 u.s? U.2.? u. )2 tJ. 3 :>

i' y lJ _l).(. .13 5 u. u. 31, j j U.J.t u.3't ll.?tl t l . N u.?b U.l..l u.:> u.oJ ^{j u_.~.,} U.<.G e Ll • .(.,y l). ( 8 U.21 u.3R U.IR 0.?6 u . u. .l) 3)

IL u.J'- U.?J. u • .5 J U.'-? U. l~ /). j to u •. 13 U.60 u.37 ^{U.12 l) • .5)}

1 1 _l? u.cs u. l. 1 t.l.?::> u . .51 lJ. j [J u • .5CJ U.1.2 LJ. i, y U.42 ^ll.J) u . .3)

1]. l 7 U./.3 u • ^.l, j u. ^{J, l} U.l '>' (J. j 1 L l . l ) O • .? R u." ^{6 . U.L.2 Ll.5)}

, j (J. 2 1 {). ()l u. 1 l u-^{~ ~ u . .sg} (J. j ~ Il . .'l. u. t,? U./9 o. ^{j 1} J • ..3 J

1 l. (). j u _{u • .!.[J U.L U U. l. U}

U. I.l! (J. ~u u .l. (J u. i, t) U.35 O.J) u. J~

,

.

i ' )-IU),U l ) . 51 _u.~ u u. 3 l U. S/ (). 3 y (I.l./', lJ. J., ~ ,() u.31. U.J2 u. j )

f ( ) - 1 U ) , I . l ) . :-7 U.3<. _{U • .3::>} u. j 1 _lJ.I.l. () .. ) u o. t.) LJ. t_, D IJ. l. 1 O • .!H u. 3)

---

l JA:4UAKY

---

]Y/0 , y 11 1 YU lY/5 1 y 14 1 9/) lill- l ty(/ lVIB lY/9 l YXO _{1 9R 1 1 9/ o-19} n

l l 'hhUU .:SU:> u.S l y 'J.Hl. .2 ";) l 1 ." 1 .)(J)(>\f~ ..)) 71 u l o l l o2 lltUP.2 /o3)9 21l64 'iS O*"'*****'"*"' 2-4'1781

"2 .:s l. ) 6 7 B _Cf .c'RS448 l./324 8 161UJR 64uu9 ₂ 75~42 2Rut...3 _1?6~8 15~!3 .22'/JS'/ 1YU.:S1.2 1 SS:>R4 4'v'JU/ 18 92 371S60 1:>41.( )>\ ^j 66 7 L 1 ':>JB l 1UM27i. 124M3o !!lt.UJ 1247) 4 Y 31934 22JIY l.S V 2u.H1o o21.1U Yo?lY ..SJOH':> 210YO Il! t6SH1 l::ll?H U)Y ~lJ)6)1'S 11t0SY •) i., .:So/44 2Uo9U ot. 631 44768 1.57.76 614 L lb j l )t;o8/ 226UY 264 1 9, 91 1'262..S YY4 IJ? u~ ut! 1 y 2 'l 2 2Yt~l9 2UYo)7 86yy6 ltlll:>6 . .H 1 ( 1 l 4 14 9o2.9 :>l' ^{( ) j o} u 211oi..3 1J244U '1251'} 46P.l.V 2u1SO 9090 /61-11 RROO 111885 t.2t.l62 HJof\6Y 12601 'JU19R 2'7'2.38 44 37 )1'\9/, 16RUU? 2 Ya(Sfl 1 c? )51c4 174 Xo)3 2Jlo YM i., l 'JS li. o l6XYX3 2U:>08 1 ..So.t, .501!21 441.58 ot'J.:SOY Su/18 l (J .55 3 12111) 2 4113 ) 606j 1 .HoR4 l" li24 Y.:S.3 U B1Hl2 u .21233)1 111.004 H!S124 o 4J3.B 28':> 1 l Y [JY 1 ~)'i 1/P.':> Y/:1 l.

1(J 1Jo44 J\1.5~ 8 ( j y BL Y.S '}.'\Q.S B31U 711 s S.t, 7R ';) 997 ..S'tHl ::>~63 70/:l H7YU

11 OYU6 l lis ¹ 4oRY ~7.32 4o17 &_; 77) I.oYI. 4 7 f.J6 .56111 4 u j , 2M6S 4U1U ) ) 60

l? 2'1)5 4 o6 l ..S6?1 2l j ) 2HIY 71.87 2'7''12 2P. fl 2 J.t,RS Z.j/3 .3 U2) lY)y _{.51 Su}

13 1 ~) j 1/3y ? ^{o )} l 2? 1.'1 1)? 'i 1 O 7U '12 6 16XS 2123 2240 lo'3Y 2u6Y 1 6/ t..

l .t. 11o9 'YR3 1106 HU2 1114 l161. i, (J) _{J2.S 1189} 14l:l? loR.3 11 5) 9R7

l :>+ 14 70 1Y7(J 22 S.:S 13.30 l O i. 2 7'1) 1lll4 BRO lB 14 1442 l t..t. 3 a./4 1 3 4)

10 TAL 1152'148 111Y.SYb 'd/21'28 'd!IY14/ '1.31)611 1uUR611 R)Yo12 1:!2..S306 644469 ot.6.L. 'J8 441Y23

St-A .. !'l. sl • 23)884 23Y112 2/.'lt-7":> 2J.YY0) 1 'fl )22 1)91'\4U 1UHH2.? 108:>63 12US9S 15..SIJ.3 1Jj.t, Sl2

- Tab le 6; North Sea Sa-i the.

VlkluAl r' 0 t' Ul A l J 01, A~ALYSIS

·:"l tJ l .. ~ 111

l "' P.,IJI'IHtkS

---

l JAkUAKY ^~

---

ly fU , y l1 _1Y7~ IYIJ l.,. ( t.. 1 y l) lY/O 1 y 11 1Y7R 1 y ( y 1YXU 1 Y H 1 1YIU-1)//I

,

"'

l L 1 17 1 1l.4S J.l'R 4(o ?U~'t 115 l?r i., U?J !.J'1y 59'.> _.5?1.1. 2.35Y p'·' .:S':JY2. , ( 5 ^{1 l. l 1 (J} l. 2714 ¹ 0.50 ^{o) 1} 41Y3 ^1")9 2 ^j 1? 1.570 24 l ; l ) 71.. 26?0 2UI.7 1?41 ₂₁₄₂ li.l'll. _{11 u2 12Yo} l ." 91 8)1, ₁ 114 y _{)Q (} 71. 'd j j / l y 1 c HYl y(.;

1.5 li. ... l , 2? o t'ii.J _7o 1 l no t 71U 1/.5 ' · ) l 1 l) lJ ? 'Jo 95) Cd :>J) 7 RIU i,[)!) 9 33 3)3 o )/2. l, l. :>91., .5Ho 1..1.).5 ^{j l , j} l, ') _'22'1 7

, J .. 11 i, ^{, j} l 16.:S /U YU tU 21Y 1.21.) "'01 ^.31) li. i'(, 1 Ul. o , 62

l u ^l Al 1441J.H/ 1.501 c..3t> 1 '1.:;, ut. 1 l u 71. 14/Ji'ou UL6.U:> 11i'Yl:ltl) 8UY~ 7oiY1B 6J..L.Iu3 /.341.21

:) ~ J.. .. fl • sl. llJ/-14 1 s 16:>17(.; LtJ.52SL 2L"lU5Y 11JI2b 1210)1 /j/J/39 160'1'1 bc173 RIU.51 8)027

~

~

'·"

~ \1

4

"'

o

_{fl '"s} -

'·' ^{~ sa-1ø}

q NfJf&,TI'f

-sl#s r

l..

..

l

o.l

~

"

A

..

.. ^().,

~

q

...

,.

);

ø ....

,-