survey_planning group_NSSH_1996.pdf (7.825Mb)

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Report of the planning group for surveys of the Nonvegian spring spawning herring and the environment of the Norwegian Sea

and adjacent waters during the spring and summer of 1996

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T6rshavn 13-14 February 1996

Report of the planning group for surveys of the Norwegian spring spawning

herring and the environment of the

Norw~iao

Sea and adjacent waters during the spring and summer of 1996.

\1eeting held in forshavn 13-14 Februarv 1996

lNTRODUCTION

In spring and summer of 1995. several surveys were conducted by resarch vessels from the Farces.

Iceiand. Norway and Russia. These surveys were coordinated according to a procedure outlined by a planning group. which met in Bergen. Norway during 2-3 March 1995 (A.non. l995a).

During l l-13 September l 995. a working group of scientists from all of these countries met in Reykjavik for contemplating the findings of the various surveys and to compile a .ioint research repon (Anon. l 995b ).

In general. it was felt that the cooperative studv of herring migrations and the environmental conditions of the Norwegian Sea and adjacent waters in spring and summer l 995 were successrul.

At the Reykjavik meeting it was agreed that the muitinational coordinated survevs of the Norwegian spring spawning herring shouid be continued. The biomass of the aduit parrof this potentially largest herring stock of the worid has increased in the last few years. A funher increase in stock abundance is expected in the coming years. mainly due to the recruitment of the year classes of 199 l and 1992.

Therefore. an increased and coordinated research effort is vital for the effective monitoring of stock migrations. composition and abundance.

The Reykjavik meeting stressed the necessity for each participating institute to allocate vessel time as soon as possible and circulate information on such descisions to the other parries when they had been taken. . F unhermore. it was agreed that. apart from monitoring stock movements and environmental conditions in ~

!

the period March-August. the main aim should be to obtain an estimate of biomass. Given adequate vessel , time. this should be possible either by appiyi.ng the echo sounder/integration technique in May, or by sonar counting of schools in June-July. or by using both of these methods.

The necessity of better coordination. in particular with regard to the presentation of survey results. was

I

pointed out by all participants of the Reykjavik meeting. The general consensus was that most survey data should be computerized and recorded in tabular form. The resuits couid then be assembled quickly and efficiently in a common data base. thus facilitating a more efficient compilation and comparison of survey data.

For these purposes. the Reykjavik meeting established a planning group (Appendix l) and decided that the group should meet in T6rshavn during 13-15 February 1996.

INTER-SHIP COMMUNICATION

The group agreed that it was not advisable to develop procedures for the exchange of detailed data on ' echo abundance. biolo~ca! samoles and hvdroi.rrapv beiWeenSillvev vessels

m

-c;iperano·n in. the

Norwemad

Sea in summer l 996. However .. the group. agr;oo that its is

O'f0_~)f~1pon~fut

the survey vessels - working in the Norwegian Sea at the same time establish contact by telex or radio!The respective cruises where such contact should be established are identified in Table l. As for the 1995 cruises in the

Norwegian Sea. the radio contacts between the vessels should be established at 2182 kHz at 0900 or 2100 UTC.

The information to be exchanizedhetween the survev vessels should be fairlv concentrateciThe topics to be focused on are

th~

^..

3£,..~..£\}~g~ rlJ

own survey

v~sseL r~~SS .£~~?

and other imponant . pelagic fish. hydrograpic conditiod. and observations or mtormation on the activity of fishing vessels. / _

CRUISE REPORT

From all cruises in the Norwegian Sea. identiried in Table La cruise epon should be prepard. This report shouid be prepared during the respective surveys. and normailv be rinished at the end of the cruise. In eacil case. the cruise ieader 1s responsible for preparing the cruise report. The scientists responsible for the herrimz mvestiszations in the resoective countries shouid then have the further resoonsibilitv for the cruise

repon~ ~e ~eeis_aft,~J.ii~ .. ~nd9f,the

Cfuise£ identiried in Table I. !he cruise

rcpo~

^{should be}

I

l}'lailed to the responsible scientists at the respective institutes oarticipating in this planning group. i.e. the Farces. Iceland. Norway and Russia. The responsible scientists at these institutes are:

Hjalti i Jakupsstovu

Hjalmar Vilhjalmsson

Sergei Belikov

Ingolf Rmtingen

Fiskirannsoknarstovan.

P.O.Box , _ 3051 FR-110 T orshavn. Faroe Islanci Marine Research Insirute Skula.gata 4. P.O.Box !.390 Rekjavik.. Iceland

PI!\1RO

6 Knioovich Street 183763 Murmansk Russia

Institute of Marine Research P.O. Box !870

5024 Bergen. Norway

The cruise report should give a brief overview of the area investigated. the recordings obtained. and the sampling conciucted. However. the cruise repon shouid also contain a nUnimwn of standard information as given in the Cruise Report Table (Appenciix 2).

DATABASE

\Vith the intention of standarciizi.ng the information collected during the surveys by the respective countries. Hjalti i J akupsstovu proposed

io

establish

i

common data base for the Norwegian Sea

surveys.

The data base should contain the most vital information regarding sampling activity, acoustic recordings.

biological samples offish. hydrograpy, and plankton. The ini:onnation should be recorded in a standard format that makes the data accessible to all of the participating institutes. An important motivation for establishing such a database is that maps of fish distribution. plankton abundance and the hydrographic regime could easily and quickly be prepared during annual evaluation meetings. During the evaluation meeting in Reykjavik in 1995 it was found that compiling the inronnation on rish distribution and hyrography from standard maps and tables from several cruises of the different panicipants was rather labourous. Another motivation for a common database on a standard format is that this will increase the amount of available data on the Norwegian Sea ecosystem substantially. Titis will enable future special studies on the dynamics and interactions within this ecosystem that can be based on more complete infonnation obtained by a more extensive· and complete surveying of the Norwegian Sea

in

space and time.

DATABASE WORKSHEETS

The planning group agreed to develop standard.s_fox:.EXCEL

~orksheets

that

sh~d

contain the most vital information gathered during the respective cruises in the Norwegian Sea in

l

996. "rhe worksheets are based on the original suggestions by Hjalti i Jakupsstovu. The planning group developed standards for a Logbook worksheet. an Acoustic worksheet. a Len~b Distribution worksheet. a Temperature

\VOrksheet. and a Plankton worksheet. The standards of these worksheets are given in the Appendix 3.

The respective worksheets should be prepared during surveys of the Norwegian Sea and adjacent waters in

1996. After each cruise. the worksheets should be copied on diskettes and sent along with the cuise report

to the participating institutes in the respective countries. A list of content should be taped to each diskette.

- _l -

The leaders of the respective cruises shouid have the resoonsibilirv to orepare the worksheets and cooy them on diskens. and the responsible scientist should have the responsibility maiiing the diskettes to the other responsible scientists in the other participating institutes in the respective countries.

CSE OF SONAR FOR MAPPING DISTRIBUTION OF SCHOOLS

In summer. the main pan of the herring is feeding in the near suriace layer or"the Norwegian Sea. often in the upper blind zone or· the echo sonder. A traditionai echo integrator survev wiil thus underestimate the stock. both in biomass and distribution surveys. However. sonar recordings seem to have the potential to krive a correct oicture of the reiative distribution of Norwegian spring spawning herring during the summer period ( ~1isund et al.. 1995 ).

As in 1995. the planning group recommend that sonar is. used regUiarly to count schools dwing

th~.

^surveys

I

!!.me Nol-weg3.in

Sea in 19%.111~ ... working procedure is siig.hl.y modified from the 1995-procedure. and is as follows:

1 ) The sonar rs seI in a fixed poswon at Ylf to the ships course

2) All school'i along a 5 nauucal mrle distance and within a range of 50 - 300 m.from the vessel should he c:ounced The recordings should be filled in the SCHOOLS-doumn of the ACOUS17C worksheet (Appendix f).

3) As a basic rule. a rift angle of one ha~f of the vertical beam w1cirh shouid be applied

The planning group recommend that the results from the intership sonar calibration in June 1995 in the Norwegian Sea are properly anaiysed. This wiil be done by 0.A.Misund at IMR. Norway. and reponed to the ICES Statutory Meeting in Reykjavik in September 1996.

SURVEYS

The following surveys have been planned for 1996.

Table l. List of planned surveys in the Norwegian Sea and adjacant waters in 1996. including names of cruiseieaders and inter-ship contact (see text for fimher explanation).

1

^Countrv ! Vessel I Period I Cruise leader ~ Contact

:1 NI i ··Wchael Sars" I 15.02 - 30.03 ! Dommasnes J Rl ! Rl

!

"'Professor Manv .. 10.02 - 25.03 ^I I DolR:olenko NI

N2 I "G.O. Sars"

I

21.03 - 02.04 I Melle None

N3 I "G.O. Sars"

I

03.04-18.04

I

^{Misund None}

N4

i

"'G.O. Sars·· 29.04 - 28.05 I Misund ~ FLILR2

FI I .. \fa1ZI1us Heinason ..

I

^{01.05 - 28.05 I} Jikuosstovu N4.ILR2 _' :I [l I .. Arni Fridriksson ..

I

02.05 - 23.05

I

Vilhiaimsson i Fl.N4.R2

I2 I .. Biarni Sremundsson·· 18.05 - 06.06

I

^Malmbern:

1

II

'

:1 R2

I

"FridtiofNansen·· 25.05 -28.07 I Krvzov 4 N4.FUI.l3, N

5

'1 I3

I

··Arni Fridriksson .. 28.05 - 14.06

I

Vilhialmsson

!

RLFI.F2

N5

!

^"'G.O. Sars" 19.07 - 15.08

l

Monstad Nelle

R

^2,

i

; ~6

i

.. Johan Hiort"

I

09.07 - 19.07 I Hassel None

~7 I ·'Johan Hiort"

I

'.!0.07 - 05.08 I Rev ~ None

'

(3~

/o_o::J_-(J~o.

The main objectives and areas to be covered during the above survevs 1 Table I) are iisted below.

\i I Rl.

'i2.

~3.

\:4.

Fl.

I I.

[2.

R2.

13.

~5.

~6.

~.7.

\fainly to

stii'Vey-thc spawrung area/.

No pians to ioilow the postsoawning migration c Figure

I).

~---

The survey area of R/V Protessor Marty in the period I 0. 02 -25. 03 is shown in Fi!?l::lre 2. The main objective is herring investigations on t!ie.bank.s

"9it~he j{CSi and north cciw of~7-qetween

62°~ and 71"'~.

The survey wiil cover the

spa~ggrol1fi 6furo~¥nd

the edge of the continental shelf of western Norwav c Figure 3 ). "

Surveying the

~~J;;ri .~~

i4:id a continuation of the Mare cognirum investigations conducted during the previuos cruise 1 N2: Figure 4 ).

The main objective wiil be to investigate the eastern part of the Norwegian Sea. i.e. the NC..Z. where 'COncCiiiiiiions ofvounsz hcrrin~nWI be survev~C/Sections wiil be worked from the Norweman

,(I/Ill""""-· .• , .. , ·- ··· -·· - - -. . -

zone into the international. the Icelandic and the Faroes economical zones <figure 5).

The Faroese survey is a

combiiied6hiewhitmg and

hemng-~rveymmtly confineci to the Faroese EEZ. RN "~fa.gnus Hemason"-starts in the area southeast of the isles and works in this area during the first week or· May. From 8-28 May the area nonh of the Faroes wiil be investigated (figure 6).

The expectation is that if the herring follows the same migration pattern as in 1995 the movements of the herring in the Faroese area shouid be observed during this sur9"ey. ·

The main objective is to locate fn,...fiP,Jlf!li'~()f

i!§s

^{stoclc compos~n}

an</

~5ian~ as weil as to ~~e y ograpiric conditions and Z()~_p!ankton abundance. The survey will begin with a section running east along 65°N to the 0° meridian and continue in the general area as shown in Figure 7.

The survey is oart of the Icelandic programme for the quart~ monitoring ofhydrobiological / conditions of Icelandic and adjacent waters. It will reach the eastern boundary of the East Icelandic Current east and nonheast of Iceland <Figure 8). Acoustic records of pelagic ii,6h will be kept anci

samples taken. -· · ·' · .. -~ · · · · f

The main objective of this swvev is to

record

livarobioloizical conditions

ariCi the

distribution of

I

herring and blue whiting in thF s~uthern -~d ce;tral part ~f the Norwegian s~(Fi~~

9).-

The survey will begin in the southern pan of the area on about 2 June and continue nonh from there to finish in the area east of Jan Mayen near the end of July.

The main objective is to

12S!~~~d

map tM.:Progrcss

of~erring migrations.,~ess

stock , composition and abundance if possible. as well as to measure hvdrographic conditions and

. zooplankton abundance. The survey will be conducted in the general area shown in Figure l 0.

\-fain object of this survey of the eastern part of the Norwegian Sea (NEZ and international waters) is the rec0rding of herring concemratibns. collection of assessmcm parameters .fuid Mare cognirum investigations. The area can eventually be extended finher to the west a into the Icelandic and Jan Mayen zones (Figure l l ).

\-fain objectives are the hvdrographic sectiones. Sviruiy-NW with extension into international zone and from Helgeland to Jan Mayen. and plankton sampling for the Mare cogniruim project. Also the recording of herring schools (Rgure 12).

The survey is mainly based on hydrographic sections with collection of sediments (CARDEEP) and on Mare cognirum investigations. Also ~ -~ h.erri!l.g schfil"~-pn these routes and. eventually, to survey the hatched area (Figure 12).

- 5 -

FUTIJRE MEETINGS

The oanicipants of the T orshavn meeting unanimousiv agreeri that a meeting for evaiuating ~1e.suld of survevs of the Nowelrian Sea and adiacent waters. conciucteci bv the research institutes oithe Farces.

Icei~ci. Norway and-Russia. shouid .be held in Re~kj!_vi~ ^il1 ~eptember;I996. priferable just before the ICES ·~\nnuai Science Conference.

ICES COORDINATION

The Planning Group agreed that ICES should be asked to take the responsibility for coordinating the / surveys of the Norwegian spring spa"wning. herring and the environment of the Norwegian Sea and ad_iacent waters in the furure. The host of the the Planning Group should make the formal adress to the General Secretary

oi

ICES about this issue.

REFERENCES

.-\non. l 995a. Report otthe pianning group for surveys on Norwegian spring spawning herring and the environment in the Norwegian Sea in summer l 995. Bergen. 2-3 March l 995.

,-\non. l 995b. Report on surveys of the distribution and migrations of the Norwegian spring spawning

herring and the environment otthe Norwegian Sea and adjacent waters during spring and summer of 1995.

Reykjavik. 11-13 September 1995.

.

\1isunci 0. A. J. Hamre. E. Ona. l. Rmtingen. D. W. Skagen and J. W. Valdemarsen 1995. Mapping of schooiing fish near the sunace by sonar. echo integrator and surface trawling. Paper presented at the Fisheries and Plankton Acoustics. Aberdeen 12-16 June 1995.

Addendum and errata.

The lenmh distribution workshet should include mean weight by lenb>th group.

For each specie a agetlength key should be produced.

-

⁽⁾

-

APPE~DIX 1.

Participants:

: Name

I

Address i Telephone

I

^{J Telerax}

I

^e-maii

. Hiaiti ¹ Jak-uosstovu

I

Fiskiram1soimarstovan

I

.,..298 15092 .,..z98 18264 · [email protected] ,

,I . .

P.O.Box .3051 ^I

l

I

l

j FR-110 Torshavn ^I

! Faroe fslands

I

; Jan Arne Jacoosen I As above I +298 15092

I

+298 18264

i

ianar2e1cUfu.fo ^J

: Ole A.rve Misumi Havrorsicningsinstirunet

i

.,..47 55238404

I

+47 55238387 olemr~mr.no

' P.O.Box 1870

! N-5024 Bergen

Norwav

I

:1 Tene Monstad : As above I +47 'i'i238404

--

I ...,.47 55238387 I tene!Wun.r.no

; Serge1 Belikov

I

^PINRO

^I

^{+47 . +47}

6 K.nipovich Street 5129510518 5129510518

I

^{183763 ~1wmansk}

I

. Russia

1

: Aleksancir Krysov

I

^{As ahove}

I

5129510518 ⁺⁴⁷

I ~~;9510518 I

^J

' Hjalmar Vilhjci.i.rnsson · Hafrannsoknastornunin 1•3545520240 +354 5623790 hjalmarr~.hafro.is

P.O. Box 1390

.

; IS-121 Reykjavik

[celanci

I

-7 -

APPENDLX2

Cruise repon content:

Name orshio Comments

Call sien Cruise number

Resoonisible laboratorv Cruise learier

Cruise oeriod

Echo sounder eauioment Echo inte2rator eauiomem Instrument calibration date

Samolim? couioment ltrawi 1

I

Samoiing eauioment lolankton1 Tvne of CID sonde

~

Number of trawl stations

I

^'

I Number of CID stations

I

I

~ Cruise lines and stations

I

On mao (including EEZ) and Database J Echo inte2Tator values c 9 crouos. see Aooendix) ^I I Distribution maos and woricsileets

;1 Sonar recordin2s

I

Database

j Lenmh distributions

I

Table and woricsheets

:! Age distribution

I

Table and worksheets

~ T emperarure

I

Horizontal distribution maps: Surface. 20. 50, I 00.

I

I 200. 400. 500m. and woricsheets

ij Plankton

I

Plankton biomass distribution mao and woricsheets ^'

Appendx3 Hemng Survey Planning

HEADING Loabook sneet:

VESSEL STATION STTYPE LOG DATE TIME LAT LON WINDIR WINFORCE STDEPTH TOWTIME WIRELENGTH HERRING BLUE WHITING CAP ELIN MACKEREL HMACKEREL SALMON LUMP SUCKER MESOPEL Acoustic sheet:

VESSEL LOG DATE TIME LAT LON SCHOOLS HESUM HE1 HE2 HE3 HE4 HES HE6 HE7 HEB HE9 BWSUM

BW1

BW2

BW3 BW4

BWS

BW6

BW7 BWB

BW9

Temcerature sheet:

VESSEL STATION LAT LON SURFACE T20

TSO

T100 T200 T400

TSOO

DESCRIPTION

ICES-list

National st. numoers

Geartypeiacuvity: one line per activity at the same station m1n4digrts

YYMMDD

GMT four digits TTMM Decimal degrees

Decimal degrees. negative LON west of 0 Compas deg. or N.NNE.NE (give units in heaaing) mls or beaufort (give units in heao1ng)

metres minutes metres

Species catch list: Always start wnh hemng (Catch in kg)

ICES-list min4digits yymmdd

GMT four digits TTMM Decimal degrees

Decimal degrees. negative LON west of O No of scoots counted each interval Speces list: Always start with hernng sa value channel 1 : 5 • 50 m sa vaiue channel 2: 50 -1 00 m sa value channel 3: 100 - 150 m sa value channel 4: 150 -200 m sa value channel 5: 200 - 250 m

sa value channel 6: 250 - 300 m

sa value channel 7: 300 -350 m

sa value channel 8: 350 • 400 m

sa value channel 9: 400 -500 m blue whiting

ICES-list

National st. numbers Decimal degrees

Decimal degrees. negative LON west of 0

Temperature at standard depths, starting from the surface

Descnption

Appendxl Hemng Survey Planning

Plankton sneet:

VESSEL STATION STTYPE LAT LON PLSUM PL 0-50 PL 50-200

Lenath sheet:

VESSEL STATION SPECIES c~ group MEANWT

ICES-list

National st. numcers

GeartypeJactivrty: one line per activity at the same station Decimal degrees

Decimal degrees. negauve LON west of 0

Plankton mg ory wetqth/m3 (or mg wet we1gtntm3) in each interval

ICES-list Station numoer

Species -se other worksheets No of fish in eacn cm group Mean we!gth in the sample (g)

Descnouon

Appendx3 Herring Survey Planning LogtJook

!~gS-lis lt:!alional ~1Gea~1min ⁴ ~1YYMMD ·!GM!! IQecimal de~~~1~ompaslmls or_ be_ 1~etres_ 1!!1.l!!~~~ ·1!!'~!!°~~-1~£:l~!~~ ~~l~~ ~st: ~lwa~ sla!! wit!! her!Lf!y !~~~!if! ~!l! . _

VESSE

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ppcndxl Herring Survey Planning Acou:..llc

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lppcndK3 Herring Survey Planning Tcmpcralurc

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Figure ^1. Planned survey area for

RJY""''~~':h~:._l

^Sars"

~I),

^{15.02 -}30.03 1996. The survey

---~lt -·--;_~i.. ... C'",.,,tt~h

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Planned survey tracks for R/V ::rrofessor Marcy" (Rl) 10.02 - 25.03 1996. The survey will begin and end at approximately i0°30"N, 20°E as indicated on the map.

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Fi~ure

3. Planned survev area

for

R/V

~.0. -S~" (N2)

2[03

~~02.04

199'6.

TI1e

survey will

1s· 20°

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-4. Planned survey area for R/V

: 'G.O. s · ars"

(N3)

03.Q4 - 18.04

19?6.

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Planned survev area for

- RJV;'G.O.

^{. •...} Sars .. (N4) 29.04 -^{. . .} .28.05.1996:~ TI1e survey ^. .-

.. ,;11 h .. ,.;.,;., rhp <:nmh nfthP ^'1rP::i :md nroceed northwards. Eventual trancets

\)

0

Q

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Figure 6. Planned survey area for

R/V

·~agnus Heinason .. (fl), 01:os - 28.05 199~ . l11e

division of the survey area in two parts is indicated by different hatching. Surveying

wil1 begin in the respective areas as indicated by the dates given.

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68.

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Figure i. Planned survey area for RJV "~

FridriksSEn"

(Il) 02.05 - 23.05 1996. The sun·ey will begin with a section along 65°~ and proceed as indicated by the dates given.

20·

70°

68°

66°

---~----~

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....,

i.

Figure 8. Planned survey transects for R/V ·:~jiuni Saemunds~on .. (12), 18.06 - 06.01:1996.

z

61.;

2s·

Figure 9.

I

- - - - - ~ - - - - ...J - - - - -1 - - - - I - - - - ;- - - r - - - -..J - - - - I

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l- - - - -' - -

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20· 1s· s· ⁰⁰

Planned survey area for RJV "FridtjofNansen"'((R2) 25.05 - 28.07 199(/. The survey will begin in the

5<;'uthem

part of the area and

pr~ceed

as indicated by the dates given.

12·

68.

66.

64.

I

- - - T - - - - -4 - - - - -1 ---•----r---~----

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Figure 10. Planned survey area for @Y ~~Arni Fridriksson'· (13), 28.05 - 14.06 tp96. The

survey will proceed as indicated

by

the dates given.

· .

so~

T i

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i _~~-\ ;.. ;

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Sars'· CN.

_{----- S),}

_12.9J_:o . ~ls.os /

1s· 20°

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10°

10·

Figure 12. Planned survev cracks and sediment srudv area for RJV ~Johan Hjort" (N6. N7), 09.07

~._05.08

^.1?96. The progress of the. surveys is

indi~~ted by the

arrows and dates given.

1s· 20°

HAVFORSKNINGSINSTITUTTET INSTITUTE OF MARINE RESEARCH

Nordnesgaten 50 - P. 0. Box 1870 Nordnes N-5024 Bergen - Norway

Tel: +47 55 23 85 00 - Fax: +47 55 23 85 31

FORSKNINGSSTASJONEN FU'JDEVIGEN FL0DEVIGEN RESEARCH STATION

N-4817 His -Norway

Tel: +47 37 01 05 80 - Fax: +47 37 01 05 15

AUSTEVOLL HAVBRUKSSTASJON

AUSTEVOLL AQUACULTURE RESEARCH STATION N-5392 Storeb0 - Norway

Tel: +47 56 18 03 42 - Fax: +47 56 18 03 98

MATRE HAVBRUKSSTASJON

MATRE AQUACULTURE RESEARCH STATION N-5198 Matredal - Norway

Tel: +47 56 36 60 40 - Fax: +47 56 36 61 43