':l'

"

'. -I',

J"

t

'\. ~.,"\ .:.~. ~ {.

C.H•• 1979/1.:v2.9BalticFish Commf'ttee,

. "

,International Council forthe EXp'loration of the Sen

!h!.:L paper not t"o be cited "ri thout prior reference to the ü'uthor ' .

•

•

Results of Tagglng Experiments on the. Rügen Spring Herring 1977/78,

. by'

N~ JÖNSSON and E. BIESTER

Wilhelm~Pieck-University of Rostock

Section Biology ~G. Fisherybiology

Summary'

In 1977, 9.753 harring \/oro tagged from Harch 22nd to June, 17th. Total

,reported recoveries were 882 (9.0 %), including 37 (0.4 %) after one

year. From April 11th to 19th. 1978; 3.090 fish weretagged. of which 592

have since boan cauGht (recovery rate: 19~2 %). includinG 4 after 1 ~ear. A

large proportion of the recoveries were reported from near tho taeeing slt~

during the two days after tagging(1977:' 45.7 %; 1978: 65.0 %). Thc. two

prineipal miGration routes through the Baltic were eonformed: a westward

route extonding to the Kattegat/Skagerrak and an castern one extending

to noout 16oE. Thc 1077'ro6ults show for the first time that the smaller

berritle spawning in Hay/June also migrate to tbe grazing area's in the

KatttegatjSkagerrak. None of the .fish tagGod in 1978 were r~~overed out­

side of thc Baltic.

Introduetion

Tbe tagging experiments on the Rügen spring he~ring startod in 1975

~erc eontinued in 1977 and 1978 (BIESTER. JÖNSSON. KRUGER, 1975. 1976 a, b;

JÖNSSON and BIESTER. 1977; KRUGER. BIESTER und JÖNSSON.1976).

Material nnd mothods

Tbo tagging mothods und aites remained unehangod. Samplos. euch

consisting of 100 horring which could be rogarded an typieal, were

takon from the same trap not. cxaminod andtaggod BIESTER anel HERING, 1977;

BIEBTER. JÖNSSOll und BIUELMANU, 1978).

Rooults

Thc start of tho tagging netions \lns dclayed by iee eovcraco in the

Groifswnldor, Doddon in Voth 1977 nnn 1978. Thc objcctive 1n1977 was to

j•"'J5..:.1• J

11

".J"" ...,··1

.j.'~

I

:J; (1$

~-I!;f

'I"\~-,:~-'1:1.~

)., .

.l

J,~

'1 .1

" I..I1

•-..1.,1·,

".·,:1!

1'ljf

· i1· .. '~:

•l1.

taG ns l!Iuny fish ns possiblo in tho course of tho spring fishing nounon,

vhereau in 19'18 tagginc opurations wero rO!it.rictad to tho month of April.

A total.or 9.753 floJh ware tatmed frorn Harch 22nd to J uno 1'lth in 1977 ..

• or thOSA, rocovo~ies ~ero reported fer 882 (9.0 %), including 37 (O~~ %)after one :/031'. In 1978, 3.090 herrJng ware tagged from April 1'1th to 19th ..

Thc 592 1'ouoverios roportod corroGpond to a l'ecovory rate of 19.? %. rI.'h~

ilmjority 01' recovol"l::"oß woro repcrtod hss tharl a ll10nth arto!' tOßc;i\l(;.

(Tnble 1).

Table 1 z Numbors of fish taeged and recovored Ilw'ing thc '1977and 1978 tngging nations

Dato of NumbAr of' Recov- % Ine1. after % At' tel' 1 %tnggintt....!·ish toggod erios .2 clays YOI11"

~2.).77 6'13 16) 26,6 110 6'1,523.3.77 620 128 20.'" 75 58 ,6 2 0,325.3.77 - 539 66 12,2 32 48,5 1 0,230.3.'/7 989 127 12,8 52 41,0 2 0,220.4.77 5Q1 65 13,0 32 40,2 I.. o,B10.5.77 827 87 10.5 49 56,3 2 0,213.5.77 577 48 8,3 15 31,3 6 1,017..5.77 371 33 0,9 15 45,5 :3 0,818.5.77 '1302 1(3 3,3 11 21) ,6 6 0,519.5.77 9'K) 62 6,6 J ''',8 4 0,'"

2.6.77 1545 51 3,3 9 17,G 5 0,3.11&77. ~22 _ 9. 1.0 2 __,,2..aE.... -

9753 882 9,0 403 '15/1 37 0,1..

11.l~~·18 862 '19 /t 22.5 122 62,913,h.7B 522 91 17,4 99 64.8 3 0,618.'f.7B 654 165 25,2 100 61,0:1~t1+·1JL..:Il>5~ ·142 13...5 101 71.1, 1 0,1, e3090 5Y2 19,2 )82 65~O lt- 0.1

._.-.... -_. ----_._- . ---_ ..

'rho lOuln rGcovery 51 taG "'01"0 in LIla Groli'nl,lD.1d.or Boddon (l'ügion 7)und the Haltic SAa (ree10n6 LieS, It.6, 4.9 and 't.ES). It ir. notowol-thy tll:tt

no recoveriou from the 1978 tugeine DctioDG havo yot bOßh roporto~ from

outu1do \.ho DaHie SOn (Tahlo 2, cf. f'ig. 1 IlUU t~)..

1'able :, and Fit:. 2 uhow tho distribution of. tho rt)COVOdOf; fron tlH.

1977 and 19'/8 tfl~r.lH~ tictions \/J thin tho firal {m·/nldOl' DOtlanD (rngiou 7)

flrd tho coastal wntors off tho ir.bnd of nür,on (roglon ü). 'fho Int'gofit rlUü:

llor cf rocovcr1eo wan roportod in tho imUlodiuto viclnit.y of thc. b.ggillr;

I.Ho. 'I'lh} mllnllOt'n declino tOHar·tllJ tho intt1riOl~ ef the ho(lJ'~n. Altholl~h

rucov(lrien frnm ro~tonfl '/.G nnd 7~~ ~.how thai, lliO fbh can ollt(,r af!cl

lUüifo 1he boddon through lhu nh~o.ln Sund, tldn routo j~. of mi.ne!' luf'c.ri:i"·'

HllCOVOl" iOI;i i'rom rogion~l 8."-. ß. J an.} ß.2. ,wd fi,'(I111 rugion:i ".0 IHU\ 'j.5

f.,;}lt''rl clonrly t.hat lhu vad. :'1;.jO!'j ty nl' tho !;fH1ill. !tol'ring ](:a\:O lh('. hodrlol'

tO'llUl'dn lila (ld~,t aftfJl' D. f;!101,t Liw) und ihr,n p:H,n 1:10:-0 (Ir lCBH iil,,!tor,3

J

\.' I - J -

II

••

.nlon6 ~he cast coa5~ cr HUgon into tho Arkon~ 50a.

Rocoverles rcporto,d from the open' s~a <lmOun'Ved to 29 % in' 1977 and,23 %in 197B. The dis~ribution ili.this ree~on 1s shown 1n F1g. 4

(cf. Fig. 1). The mOEt distant rocovorios werongain reportod trom the

Skagevrak (4, includinJ the turthost trom Oslo~jord), the Ksttegat (8)and thc Sund (1) in 19?7~ Thc reeoverlos reported,from the area west of

thc Darse Sill (Darsr.;er Ort, Cudot Tronch, "lustrov, Neuhaus, WnrnemUndo,

Gcdsor Ref, M~n) nnd from tho Swodish coast (ystad. Trellobofg. Falster­

borav) belong to tha pAttern of, this westward migrat1ng component in

tho BaIHe.

Tho 1977 tagGing nction brought tor the tirst time ~~~ recoyor1 Qt

fiah in tho S}(~gerrnk and Ka ttogat whieh h'ad bean ~~ß'~EHl ~n tho Gre"Cs­

walder Bodden' during May/Juno. This shows that the smaU horring spn~~ng. ~ ~

lute in~ tho senson aloe mlgrate to the feoding nr!:~G ~n the Skagorrak/

KnVt'oGn't-.,

Uif,ratioJl to t110 other foeding nrea in the Baltie east of RUgeni.ltfus

aonfirmod by rccovorios In ~oglon5 4.3. 4.6 ~n~ ~ ~c" Fig. 1)~ THd' dm~ll

hcrring tneGod Into in the aesaon prodomlnllt~ ~~ this area. Sorting cr'"thc rocoverios roported in tbo Groifmmlder BC?~q.,on and immodiatoly' oiltho nURO~ coast (rogion ß) in rospect of month of recovery showß clo8~lt

(cG}locially in 1978 uhon taeginc 'Was reatrictcd to April) that tho herr,lrllf

relllain ln thu Bodden for only a short time. It also demonstratoD tlw

homine abilitioD of tho horring und the ntrength 01' tholr link tothoir

r;pawning grounds (Tilblo 5).

Sor~ing 01' ~ho rücovorio5 in rospact of different fishlng;er.aunds out­

sido'j tlie Greit'swuldor Boddon providos .,i~formation on the l!l~~.a'tion rout.IR

to and 1 fFom th05,IKl,wning r:Tounds.i Tho ::>.oüs.9pal character q! ..~he r hy nt

the tecdinr, nx:oa iis c.toar ly npp~r.ent. Tho miera tion back ·trom tho spnwning

grounds follown thc samo route as tho mi~ation in ·\;.ho appotite dlroctlon.

FrOin thc \4ont. tho routo pa::ir;Of; nlmofit .invur-irilH3 "through tho Sund. Tho

first recovery indicuting thnt:: rilturn 'miGTütions I:1UY also pans through tho

Groat Eolt C'llablo G) ..;;)~ irwclo in O'Jtobor -in reGion 2.6 O'lC_ '1). Tho fiah

wa~ taCßod 101971.5incl} out tHgging o:.<.v~rir.lontfi r;tnrtod in 19'15. wo hnvo so rar- roceivod

rop0l'ts of 2 lWI'!'li1g r(~co\;()r()d after 3 yonrz, 1'1 Aftor 2 yt)ars, aun. 78afler -I j·t~Hr.

. ,

Discussion

........

).1

t

j.,r

The furthor rlso in' tho 'recovery rate con:par.IJ.~t '<li th previous toeeinr.... ( .....• actions (1975: 3. 1r %; .. 1976: 6~8 %;. ~977: 9.0%i~~:1978: 19.2 %) i~ duo

tlainly to tho largo n~bfJrn rop~rt~J. from the :G·~eifrJwaldor Boddon i tsol!.

Duo to tho largo numbers of fishing g(~ars in tl1'o im:neuia to vicilli ty of tho

taggine site wo received 45.7 %(1977) and G5:0'% '(1970) of all rocoverios

alrelldy during the 2 dnys .followiug tho day of taeeing, espocially from

the trap nat flsherlos.' The noticeablo drop in tho numbor of nuch " chOl.'t­

te~m" rocoverios,as the seasen proceeded (dflGpito thc Inrger numbers

tagged) in 197'1 io .remarl~ablo and cannot Lo oxplained rJololy in terms of

the soasonal reduction in thc number of fishine gonrs in use.

Tho dißtribution of the recoveries in tho Greifswaldar Bodden 15 r.;rmilar

to tbllt of provious yoars: the number dirnlnishos cloarly towardn tho

1nter10r of the bodden. Sineo vory t'ew recovarios \Jore mado horo ovcr a

veek after th~ day of tngging, i t may bo aSGwned thut the horring romaln.

at tbe 5pawnlng grounds on1y briefly und, aftel' spul<Julng, leave tho bodden.

towurds the north Gant (tho existonC:Q of n small wont\lard mi.gration throut;h

tbo Strela Sund wan confirrned). Aß tho recovorio5 t'rotn ro~ionl3 1•• 0. t J~.~.

8.4, 8.3 and 8.2 show, tho spring herring pasn mora 01" 105B inGhoro alons

the east coast of RÜI~eu into tho Arkona Zen.'

The migration thon.proeeeds alont! t\Jo distinct routen. 'rho first i~

to tho -west, oither a10n[; thc GDR coaat (North ;HUgon, DarnGor Ort, Cndet

Trench, Wustrov, Nouhaus, Warno1uiindo, Gedonr net' to a point off Külllunes­

born) ud thenco to the north coast of Donmnrk (M~t11 01' along tha nouth

coast of Swaden (Ystad, Troll~t()rg, Falsterborov) nnd through tho f)ur~

into tho Kattega t and Skagol'rak.' In con1.radiction to. our' formol' as::mwption

tliat only the. lurge herrin/; Gpmmine enrly in tho seu.son mllh\r L!il<o Uds

long lI1i~'at1on•. tho rosnltfi of the '1977 nation 11hO\'1 thnt tho ~maller ardlllillr.

ßpawning in May/Juno al'O nIso u1110 to rouch tho foodi ng fI1'l~aH in tllu Ku tlofa t

and Skugorruk.. Tho RUgon hül'ring lhen r.11XU5 1011 th ·t.ho difftH'ont utocl(f) f.rum.

tho Gkncorrnk, Y.utlQGut. l1ürth ,sOH und }jolt noa (,\(;I\~:1(FOnn, 1')'1'/; l\IE:.iTl:!l,

19'19; IlIE~TEU ot al.... '19'77. Jr.USi'~H, 195'1; m~}l/m, '1975).

Recoverioti rftl)Ortod in Oolobor uflll 1Io\iemlJOl' fro!'l tho (}t'oGund Cf"lnfirl11

that tho roturn r:icr'rti'ion ·foi1o\/l'; tho W".lmo routo an tha r.d!';l'ution tu tho

fooding [Iron. So. far, only an l:wlnted rOGo\lot'Y LlI O::.lolJ~l·. 197'(, indic:lt r.;,

th:lt. tho roturfl J::1ir;x'utic.n 'fIln;j cd::lO tal~Q plnGo t111'o\lgh t1lt) Groot llclt.

DOflpjiH. tllc largu IHllnLul's ropol'ttHI J:'ocov\,;t'it.~r;, 110 nah fl'OHI llli' '1~f/U

tncm1ng aotion lülVu so fnr Lüol1 rUCO\l(H'OU olll.!ddo 01 tho Hal t.i..;;. '.lhntIH'.t"

•

•

•

•

- 5 -

thts iD du~ to tho lona iee covcrago'on the Gtoifswaldcr Bolden and the

conGoquent ll.l.to COl'm:l'mcoinent Clf taee!~b opol:ations or whethor 15 somehow

relatod to tho flshine mcthods uiod in Danizh3nd Swedish vaters is at'prenen t ulll:nown.

Tho other dir.cction of migration leads thc smaller· herrine oastwnrds.

'fhose fi!lh mlrrroto Lo a feuding und .wi!"ltorine area extonJing r~~ö~l~. . ·0'

from the "anti Bight (nouth Swodnn) to east of Bornholm (16 E) and neroaB'

tho Oder Bank towurds Kolobrzog (Pooplo's Republic of Polend). nore tho

RUgen spring herring mix with the sprine herring from thc south Swodlsh

coast ospoclally in tho westorn part of tho "an8 Bight und tbo sen aroa

off Bornholm.

Hecovories receivod aft~r 1 - J yoars trom the east coas~ of RUaanJ

und the Greifr.waldor Bodden prove timt the floh return to their spawning. ,.,

erounds and show that tho taeeing method 1s satißfaotory.

Roferencos

ACKEHFons, 11. (1977): On tho winter-spring spawnlng horring in thoKattogat. .Moddolanda fron Havsfiskelaborat6riet Lynokll Nr.225 .

IIU;CTEH, E., U.JÖNSSOll and G.KRUGER (1975) I Prel1minary repol-t on· runrkingon spring herrine il1 tho Ruecon Bodden' 19'15.TeES, C,rI. 19'/51 Pr 11

fnEsTER, E., l~. JCllSSON und Go KRVGER (1976 a): Tho resuito or mnrkineexperimonts i11 '1975 on tho Rtie~n npring herring.leES, C.H.: 1976/ : P: 15-.

BIESTER, E., N. JÜUSSON und 11. KRUGER (1976 b): Ergebnioso der l1nrkieruncon'1975 um Rü~ünnchen FrUhjahr~hering •Fiflcherol-Fornchung 14: 19-21.

BIF:STEH, E., ll. ,JÖnSSON nn:i G. KRUGER (1977): Thc resultn of taer:inl!oxporimont.s in 1976 o.n RUAgen s:"Jring opnwnint, herring.leES, C.N. 1977: P: 18

Hlr.~TEH, E. und P. lIETII1lG (1977): Chanr,cs in tho populationstructu~e of tho ho~ring in tbo Groifswaldor Boddondud.ng opnwüing ·tinlO ,in spr ing•

. leES,·C.H. 1977/'P: 20

BII~!)Tr:n, E., U. ,Tölfssorr, Pe lIUUlIG und N. DRn~LrtU1ll (1978): Fischoroi­biologir:cho Untorsuc:huntien um IlüeOntchon FrUhjohrr.;-·heriliL; 19'15 •• 1977.\1bl";.'foitsdIlO

• WrU-Rontor;k 2'7. n.J~: Jt17 - I~J?

.JEllSEU r A.S.C. (1951): rUgrl1tlon of thfl herrinc in th& 'l.'ator:; rount! Dcmnurk~

fiup .. Proc.Vol'b.Cuns. int.Expl.t·ler -12th 29 - 35J{jN:~Sorl, N. unu E.BIESTER (197'1): Proliminary resul t::; of horring t.uGeiug

in lho Groirnwuldor Boddon 1977.leES, C.l·f.· 19'1'1/ P: 17

, i, t", ~ • .. ':. \ ~': (~:> 'J, ~1 ". )~ ~ f' '_ .. ~. ,'" ," ~ ... ,KRUGEn. G•• E. BIES'I'E:R 8nd N.JCNSSON' (197?); PreliminRry :rosnlts, uf ,tho

herr int marking action': in 'the Greffswtlldar' Boddunin 1976.leES,. C.M. 1976/ P: 16~,

,.,EBER. Y. (1975h A tagging experiment on upring spHwning herring ofth~ Kiel Bay.

Ber.d.wiss.Komm.Meeresforsch. 24: 184 - 188:

"

\\

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

Marking'date

Gr.Bodden %otre­Region? ooveries 0

outside Region 71 2 3 4- 5

% o~. re...8 coverj,es

outside· Baltic01 3

% cf re­coveri'e!:

%of recov. re-outside 7 r:a:r~(S

22:3~77 .144'.. 23.3:77 ". >~'1'O:3'. 25.3.77 ')3

)0.).77 79 ... ..20.4.77F48 '.

'. 10~'5.77·' 76.

~·1)~5.77 31i. 17 ..5.77 22

18.5.77 21

19.5.77 312..6;77 35

17.6.77 2

'88~)'

80.5

'50,0

62,2

..73,887,464,666,748,8

50,0

68~6

22,2

1

1

1

1

1

1

1

)

1

1

1

14

20.1~ 27:' 2

4214

912

8

17 1

. 23 ..1

12 2

3 2

54

2

'62

2

2,..c.

34·

1

11~7

19.5.50,0

37,826.2

12 6,35,4:33,)

51,2

50,0

31 4, .

77,8

.2

'1

1

1

1

1

1

.1

1

.1

1

0,8

3,0

1,5

4 2,3,0

4,8

3,912',5.':

4,0

12.5

9,1

+1 ;:ec;;'leryoutside 7

625 71.0 4 8 l' 1 201 8 33 1+ 8 -1 5,1

·11.4.78, .'

1).4.78

18.4.78. 19.4.78

150

72

13995

; ~77,3

'i 79,1.: 84,2

66,9

28

15

15

'30

88

164

2 917

2 46; .. $.{...

22,7

20,9

15,8

3.3,1

2.3.0

Table2: Numbers and percentages cf recoveries inside and autslde cf the Greifswalder E~dder.~

from the 1977 and1978 tagging actions (ci. Fig. 1 a~d 2)

<~::::=---.o:-.~~-_..--..,..------~-~-_..

Marking n e C 0 ., 3 r y :- e g i 0 ~

date 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 7.'10 71 8.2 8.3 8.4 8 l:' o I'• .,1 .... 0

22.3.77 11 28 82 1 7 13 2 ':l 2...23.3.77 8 16 46+1 1 4 2 19 6 Lf-

25.3.77 1 '10 12 '1 2 4 3 2

JO.3.77 4 16 35+2 3 1 2 1/~ 1 -1 5 1I

20.4.77 6 9+1 17.,.1 0+1 8 1 3+1 -: +1

10.5.77 4 21+1 26 5+1 18 1 1

13.5.77 1 9+4 10 5 1 1 2

17.5.77 2. 4 9 0+1 1+1 4 1 1

18.5.77 14 1-+ .\ 1 2 0+1 1 A 2I

19.5.77 1 23 5 0+1 ;, 2 1+1I

2.6.77 1 12+1 16+1 4-

17.6.77 2 0+1

39 113+0 288+5 3+1 8+2 1 54+3 79 2+2 18+1 5 7 17+3 1

1'1.4.78 8 36 66 1 2 14 1) 10 16

13.4.78 3+1 29 23 0+1 9 4 2 1 0+1.-

18.4.78 1 23 46 37 1 ... 15 10 1 J 9...19.4.78 6 33 19 1 1 12 12 11 17

1 40+1 144- 145 1+1 2 5 50 39 1 26 4-5 O~1

Table ): Distribution cf recoveries in regions 7 and 8 fron the 1977 and 1978ta5Ging actions ( +1 etc. =number of recoveries riportad after 1 y~ar)

~ar!~ing F: e ,. :;; v e r y r e c i 0 :l... :;.,

O. 'i 0.9 0.7 1.2 1.5 1.10 '" 't 2.6 J 4.1 ~.2 4.3 4.4- 4.5 I ' 4.7 4 Q, 4.9 4.? 5.1 ~ / 5.5 - ,...,date- o '? '-t.o ; ...,. ~.~ ... .... ./ ..22.3.77 -:l .-I .. 0./ I

23.3.77 1 4+1 1 12 2

25.3.77 ~ 1 1 5 '" 10+- 1J.+1 1 1 /.I I

,

30.J.77 1 7 23 4 2

20.4.77 '1 5 2,.

'10

10.5.77 "", ,.1c:. 0

13.5.77 1 1 1 2 6.;.-2 1

17.5.77 1 1 ... ,.., 3+1I c:.

1E .5. 77 1 1 3 r: '1 0 0+1 O~1.J

19.5.77 2 1 1 '1 10 1 0+1 0."' .. 1 1

2.6.77 A 1 3+'1 5+2 1 1 1•17.6.77 1 :3 1 0+1

-; '1 1 1 2 3,..,

1 1 '" 2 1 2,.

48+2,.

1+1 105+6 13+2 6 J 1 2+2c. l 0 0

11.4.78 2 12 14

13.4.78 1 2 1 7 4

18.4.78 1 2 1 0 1 1 1./

19.4.78 ·1 2 '16+1 10

1 1 1 8 2 44+1 29 .. 1I

Table L: Distribution cf recoveries in 1977 and 1978 from fishine ;;=cunds 1:1 the open sea

Reco"lery R e c 0 v. e: r y -= e ,.. i 0 :0.b

7.1 7.2 7.3 7.'J. 7.5 7.6 7.. 7 7.6 7.9 7.10 7.: S.2 8.3 E:.4 (' - , r

lI'!on~h :,:;. :i () .....-;

r"- 20 61 159 1,., Cl ' - 10 ;, r

.1.':' C. i '"'") 0C'-

t.'- rv 10 16 33 1 4 1 17 6 2 J 2 "..C\ V 7 36 32 "" 10 c~t5 4- 2 c: E '1, .-I

'" I.V! 2. 1'+- 2 18 ... 1

I!! 1

0:) IV 6 2 1 1 1C'-

V 5 1 1 1,.,

I0'\

VII ",.

'" a

VIII .,,coC'- IV 1 39 ... " ., 139 2 5 47 37 1 ?==. 451"1' ... ....~.

(1\

V 1 2 6 1 ~ 2 '1'" '"'C\

:-- rl 1 1C\ V 1"="'

' .... ,

Table c:;. Recoveries 50rted according to month for the Sre ifs'.:s.lc.er ToJden :-lnd .. c""'" east ccast of Rügen froc the 1977 and 1978 ta~Gin~ action~ (cf. :- ig. -r

• ".~ '•• ,,- ',' ".~. >, -- '•.,' I

--

R~coverJ R e c 0 ~ e r y r e g i 0 n

" 5.4lr;~nt.h O~ 1 C ":' 0.9 o.? 1.2 1.5 1.10 1.1 " ,.. ) 4.1 4.2 4.. 3 4.4 4.5 4.6 4.7 4.8 4'.9 4.1 5.1 5.5 5 ?• I c:.o ••

II! 4 1 42 3r u 18 2 ",.., 6 2 '11i .... {,. 2 4 1 1 1 ...· :3 1 ,.

" •• --t'-V! 1 1 1 ':t 20 1 15 1 2.;

t'- VI! '1 1 1 :3Vln 1 1 2

Ü\ IX 1 '1 1-.:- X "'1 1 2 2 1 'i 1 1

X! 1 1XZ:L '"<c:.

co r: 'iIII 2 1

t'- TU 4 ')'....y 1

(J\'JI '1"r"" -~<. ... A

r.; 7 2 41 24 'I:::0 ,

V 1 2 4 1t'- VI 1 1

,.I

VII ~

0"1IX 1

":"' i:r 1

0"\l:"- V 1o~

"

?able 6: Recoveries scrted according to m·ont.h for the differer.t. fish5.n b gTCI..ma.Zoutside cf the Greifswalder Eod::ien from ths 19'(7 ane. 1978 tqggj.:i~ c::.~tiO:1S

( '), recove~ies duri~b 1977/78

(1J (54+3) (79)

7.7 7.B 7.9 Ci[5] [50] . [39]

il 'Morkinc; slte

Balt ic

1

. ,

j

.~jl)i

L9'~

Baltic

-,.--. .16" 1~'

, .1S •.-.

li