Report of the Third Workshop on the Assessment of Shrimp and Groundfish Fisheries on the Brazil-Guianas Shelf, Belém, Brazil, 24 May - 10 June 1999

217 Pages·2000·6.3 MB·English

by  Food and Agriculture Organization Western Central Atlantic Fishery Commission (DE-601)101708009 (DE-588)605759-7

FAOFisheriesReportNo.628 FIPP/R62S
ISSN0429-0337
WESTERNCENTRALATLANTICFISHERYCOMMISSION
Reportofthe
THIRDWORKSHOPONTHEASSESSMENTOFSHRIMPAND
GROUNDFISHFISHERIESONTHEBRAZIL-GUIANASSHELF
Bel£m,Brazil,24May-10June1999
CAsAsResIsCmeOnMtFPirsohgerriaemsR(eCsFoRurAcMePs)
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FAQFisheriesReportNo.628 FIPP/R628
WESTERNCENTRALATLANTICFISHERYCOMMISSION
Reportofthe
THIRDWORKSHOPONTHEASSESSMENTOF
SHRIMPANDGROUNDFISHFISHERIESONTHEBRAZIL-GUIANASSHELF
Belem,Brazil.24May-10June1999
FOODANDAGRICULTUREORGANIZATIONOFTHEUNITEDNATIONS
Rome,2000
Thig On*
Z2KY-6CY-R486 material
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oftheUnitedNationsconcerningthelegalstatusofanycountry,
dteerlriimtiotrya,tiocnitoyfoirtsafrroenatieorrsoofrbiotsunaduatrhioerist.ies,orconcerningthe
ISBN92-5-104536-4
awAppiiSRliureennolttrfformhvhoovmreiorroiiicumm,rdsgeaatiesh,ttzIdtiiiwtesoaoorIdtnlinnnhyrtfewetspopoieshrrrrstneomoohorbauddoupvytluuureeidcctcedrott-e.mnabmiffneaisDooRsyirirselavfipepiudrotlrrsdednoliiousyroocdacreonaaulof,[e-mail]enlfeoorpe,omnlcrindTioPnf-eaeduarrclubrtsoolc.immmitpomesiAnutehoprhrdipnepoicnlfogioicCsafcoaemaalpramstnyatairpcdetoiiauresnglrirMshlapiputalarolf,lostohhreiio0iinmslnb0sedi1ttudeathh0cirreii0hasedss
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PREPARATIONOFTHISDOCUMENT
ThisdocumentwaspreparedbytheFoodandAgricultureOrganizationoftheUnitedNations
(FAO), which organized the third Stock AssessmentWorkshop on the Shrimp and
GroundfishFisheriesontheBrazil-GuianaShelfinBrazilfrom24Mayto10June1999.The
WthoerkCsAhRopICwOaMsoFrigsahneirzieesdaRnedsofuurncdeedAsthsreosusgmhenthteaFnIdSHMCaOnDaEgePmreonjetctPirnogcorlalmabo(rCaFtiRoAnMwPi)t,h
funded by the Canadian International Development Agency (CIDA). The work was
accomplishedundertheguidanceandwithsupportofFAO/WesternCentralAtlanticFishery
Commission.
TheFISHCODEProject(GCP/INT/648/NOR),thatisfundedbyNorway,aimsatimproving
thequalityofscientificadviceforfisheriesmangementandamajorinvolvementofall
fstuankdeehdolbdyerCs.FRThAiMsPWoarnkdshthoepFwAaOs/aDAfNolIlDoAw-uPprotjoecttwoGCsPim/iIlNarT/w5o7r5ks/hDoEpNs“jTorianitlnyinogrginanfiizshedstaoncdk
assessmentandfisheryresearchplanning".
Thisdocumentisafollow-uptoFAOFisheriesReport600,whichcontainsthedocuments
preparedatthesecondworkshopheldinPort-of-Spain,TrinidadandTobagofrom7to18
ABperlilem19o9n7.tIhteasmsaermibnelesshtrhiempreapnordtsgrporuenpdafriesdhbfeifsoherreieasndanddurtihnegirthmeatnhairgdeWmoernktshofopnohretlhderinn
Brazil,FrenchGuiana,Guyana,Suriname,TrinidadandTobagoandeasternVenezuela.
aItsisnecslusdmeesntnatpiaopnealrsreopnortsshrainmdppaanpdersgroonunmdefitshhodroelsooguyrcpersesaenndtedtheaitrthmeanWaorgkesmheonptapnrdepsatroecdk
duringtheWorkshop.Sections18and19dealwiththebio-economicsofshrimpfisheriesof
theBrazil-Guianashelfandinparticularwithseasonality,riskanduncertainty.
Section20containsareportonameetingwheretheresultsofassessmentswerepresented
tothefisheriesmanagersand recommendationsweredraftedforfollow-upactivities,
includingnationalworkshopstodiscusstheresultsoftheassessmentsmadeinBelemwith
arlelpsorttaskewheolrdeerisssiuneedacahscFoiuenltdryR.epSourcthsfooflltohwe-uFpImSeHetCiOnDgsEaPlrroejaedcytdiindtthaekelaplnagcueagiens20u0s0edanadt
thosemeetings(Dutch,English,French,PortugueseandSpanish).
Thisdocument,acontributionoftheFISHCODEProject,hasbeeneditedbyPaulMedley,in
closecooperationwiththevariousauthors,aswellasKevernCochraneandSiebren
Venema.
AVenreezpouretlao,fwtihllebfeouirstshuerdegsioonoanlbWyotrhkesFhoIpSHiCnOtDhiEssPreorjieecst,,waalssoiansOactFoAbOerFi2s0h0e0rieisnRCeupmoratn.a,
SiebrenC.Venema
ProjectManagerFISHCODE
GCP/INT/648/NOR
iii Copyrightedmaterial
FAO/WesternCentralAtlanticFisheryCommission.
ReportofthethirdWorkshopontheAssessmentofShrimpandGroundfishFisheries
ontheBrazil-GuianasShelf.Belem,Brazil,24May-10June1999.
FAOFisheriesReport.No.628.Rome,FAO.2000.206p.
ABSTRACT
Thisdocumentassemblesthereportsonthemarineshrimpandgroundfishfisheries
ofnorthernBrazil,FrenchGuiana,Guyana,Suriname.TrinidadandTobagoand
easternVenezuelapreparedforandduringthethirdWorkshopontheAssessmentof
ShrimpandGroundfishFisheriesontheBrazil-GuianasShelf,heldinBelem,Brazil,
from24Mayto10June1999.
Section2includespapersdealingwithoverviewsofimportantshrimpandgroundfish
resourcesandtheirfisheries.Section3dealswithfisheriesmanagementpracticesin
theareainthecontextoftheCodeofConductforResponsibleFisheries.Sections4
and5containpapersonstockassessmentmethodologyapplicableintheregion.
|;afSienscdhteirgoirneossuni6ndfgtieosnhe1r8faildsehaaenrlidewsii.nthpSaenrctaittciiuoolnnaarl1w7oirthaslsuseboa-srdoenegaailloisntaylw,itarhisssktehasensdmbeiunnoct-eserctooafninostmeyil.cescteofdsshhrriimmpp
Section19isareportofataskgrouponsnapperfisheriesoftheBrazil-GuianasShelf,
itincludesadiscussiononfuturemanagementmeasures.
Section20containsareportonameetingwheretheresultsofassessmentswere
presentedtothefisheriesmanagersandrecommendationsweredraftedforfollow-up
activities.
Thenamesandaddressesofthevariousauthorscanbeobtainedfromthesection
headingsandthelistofparticipantsinSection22.
ThereisanextensivelistofreferencesinSection21.
Distribution:
CFRAMP
DonorAgencies
FAOFisheriesDepartment
FFAAOOORfefgiicoensalinFtihseheRreigeisoOnfficers
WWPaEErtCCiAAciFFpaCCntDNsiastttoirotinhbaiusltiWCooonrrLrkiesstshpoopndaenndtsFollow-upWorkshops
IV Copyrightedmateri
TABLEOFCONTENTS
1 INTRODUCTION 1
2 BACKGROUNDTOTHESHRIMPANDGROUNDFISHFISHERIESOFTHEREGION 4
2J Brazil 4
22 FrenchGuiana 5
2.3 Suriname 5
2.4 Guyana 7
2.5 Venezuela 8
2.6 TnmdadandTobago 9
21 Jamaica 9
3 EXISTINGAPPROACHESTOFISHERIESMANAGEMENTINTHEBRAZIL-GUIANAS
SHELF 11
3.1 Legalframework 11
3.2 RegionalCooperation 13
3.3 Precautionaryapproachtofisheries 13
3.4 Nationalfisherieslegislation 14
35 Institutionalstructure 16
3.6 Currentmanagementgoals 21
3.7 Fisherymanagementissues 21
3.8 Currentmanagementregulations 22
3.9 Regionalapproachtomanagement 30
4 RlflMASSDYNAMICMODFIS .3?
5 DEVELOPMENTOFAMULTISPECIES-MULTIGEARPER-RECRUITMODELTHAT
INCORPORATESPARAMETERVARIABILITY 33
5J Introduction 33
5.2 Thedevelopmentofamultispecies-multifisheryper-recruitmodel 33
5.3 Calculationofbiologicalreferencepoints 36
5.4 Incorporatingvariabilityintotheassessmentframework 36
6 NORTHERNBRAZILSHRIMPFISHERIES 37
6.1 Descriptionofthefisheries 37
fL2 Trendsincatchandeffort 22
6.3 Populationdynamicsandstockassessment 40
6.4 Stockassessments 4?
6.5 Management 43
6.6 Researchprogramme 43
7 ABRSAPZEICLTSOFFISHINGFORSNAPPER(Lutjanuspupureus)ONTHENORTHCOASTOF45
7.1 Background 45
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8 THEFISHERYFORBROWNSHRIMP(Penaeussubtilis)INFRENCHGUIANA 54
8.1 Thefishery 54
8.2 Dataandbiologicalinputs 56
823 Assessments.... fiQ
8.4 Generalcommentsonqualityofassessment 68
8fL.f5i MCoanncalguesimoennstconsiderations— — „ — — 7U0
9 REDSNAPPER(Lutianusourpureus)FISHERYINFRENCHGUIANA 72
9J Introduction— ....... . ...72
9.2 Dataandbiologicalinputs 75
923 Assessments 77
9.4 Stock-recruitmentandyieldperrecruit 84
9.5 Discussionandmanagementconsiderations 86
lfl SHRIMPANDFINF1SHFISHERIESINSURINAME 87
10.1 Generalbackground 87
102 Collectionofdataforstockassessment 87
10.3 Shrimpfishery 88
10.4 SeabobFishery 94
105 Finfishfisheries 94
11 ASSESSMENTSOFSHRIMPFISHERIESOFGUYANA 105
11.1 Background 105
11.2 Distributionofthespecies 106
11.3 Biologicaldata 106
114 Catchandeffortdata 107
11.5 Stockassessmentmethods 107
116 Resultsanddiscussion 102
11.7 Conclusions 109
118 Recommendations IQS
12 AASNSDEBSUSTMTEENRTFSISOHF(FNeIbSrHiEsRmIiEcSroIpNsG)UYANAFORBANGAMARY(Macrodonancylodo1n1)0
1?1 Introduction 110
12.2 Biology Ill
175 Datauser!fortheassessment 112
12.4 EstimationofL,andKparameters 113
12.5 Gearselectivity 114
12.6 CatchCurveAnalysis(EhrhardtandLeqault1996) 116
12.7 Catchperunitofeffort(CPUE)trends 119
12.8 Multifishery-multispeciesper-recruitmodelling(Booth1999) 120
12.9 Discussion 122
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12.10 Conclusion 12.1
13 STOCKASSESSMENTOFTWOSCIAENIDFISHERIESINTHEWESTCOASTOF
TRINIDADANDTOBAGO 124
13.1 Introduction 124
13.2 Data JL25
13.3 Stockassessmentmethods 125
13.4 Resultsanddiscussion 126
13.5 Conclusion 137
14 ANALYSISOFINDUSTRIALTRAWLANDARTISANALFISHERIESOFWHITEMOUTH
CROAKERIMicropoaoniasfurnieriOFVENEZUELAANDTRINIDADANDTOBAGOIN
THEGULFOFPARIAANDORINOCORIVERDELTA 138
14.1 Background 138
14.2 Datasets 140
14.3 Biomassdynamicsstockassessment 141
14.4 Yieldperrecruitstockassessment 144
14.5 Discussion 147
15 PRELIMINARYASSESSMENTQFTHEJAMAICANPENAEIDSHRIMPFISHERIESOF
KINGSTONHARBOUR 149
15.1 Introduction 149
15.2 Data 149
15.3 Methods 150
15.4 Results 150
15.5 Discussion 152
15.6 Conclusionsandrecommendations 153
15 APPLICATIONOFAMULTISPECIES-MULTIGEARPER-RECRUITMODELTHAT
INCORPORATESPARAMETERVARIABILITYTOTHESHRIMPANDGRQUNDFISH
FISHERIESQfGUYANA 154
16.1 Summary 154
16.2 Introduction 154
16.3 Methods 155
16.4 Results 15B
16.5 Discussion 170
II BDIEQA-LEICNQGNWOIMTHICSSEOAFSOSNHARLIIMTPY,FIRSIHSEKRIAENSDQUFNTCHEERTBARIANZTIYL-GUYANASHELF: 173
171 Introduction 173
17.2 Theprecautionaryapproachtoshrimpfisheriesmanagement:dealingwithriskand
uncertainty 174
17.3 Decisiontableswithandwithoutmathematicalprobabilities 174
17.4 Bayesiancriterion 174
175 Decisioncriteriawithoutmathematicalprobabilities 175
17.6 Bio-economicmodelforamulti-speciesmulti-fleetshrimpfishery 175
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IB CASESTUDYFORAMULTI-SPECIESMULTI-FLEETSHAREDSTOCKFISHERY:
VPERNEELIZMUIENLAARYTRBAIWQ-LEFCIQSNHQEMRIYCANALYSISQFTHETRINIDADANDTQBAGQ/ 179
18.1 DescriptionoftheTrinidadandTobaaofishery 179
18.2 DescriptionoftheVenezuelafishery 179
18.3 Methods 1X9
18.4 Results...................... 183
IBS P.nndnsinns 185
1Bfi Rpmmmpnrlatmnsforfutureresearch 125
19 REPORTONMEETINGOFTHETASK.GROUPONSNAPPERFISHER1ES.OETHE
BRAZ1L-GUIANASSHELF 186
2D REPORTQNTHEMEETINGOFFISHERIESDIRECTORS 189
21 REFERENCES 194
22 LISTOFPARTICIPANTS 203
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