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PAGE9MAZINAx19IGANWINTER20122013AQUATICINVASIVESPECIESINLANDFISHERIESSearchingforaquaticinvasivespeciesSamplingalakeforaquaticinvasivespeciesDaraOlsonGLIFWCx19saquaticinvasivespeciescoordinatortossesaraketopullinplantsanddebrisforanalysis.photoSamQuagonOdanahWis.x14AquaticinvasivespeciesAISdegradeaquaticecosystemsandtreatyresourcesbyoutcompetinganddisplacingnativespecies.BecauseofthisGLIFWCstaffhaveworkedcooperativelywithotheragenciestoidentifythepresenceofAISincededterritorywaterssince2004.In2012GLIFWCstaffsurveyed31lakesinnorthernWisconsinandthewesternUpperPeninsulaofMichiganforAISincoordinationwithmanagementpartnersincludingtribalnaturalresourcedepartmentsnationalforestsWisconsinDNRcountyAIScoordinatorsandvariousotherlocalpartners.Twohundredfiveinvasivespeciessitescomprising23speciesweremappedin2012.Inadditionmanoominwasdocumentedonfivelakesandtwonativespeciesofspecialconcernwerealsodocumented.AISsurveystargetedlakeswithsignificanttribalogaawalleyeandmanoominwildriceharvestaswellaslargelakeswithlotsofboattrafficorlakesclosetoinfestedwaters.BecausethemajorityofAISarespreadbywatercraftboatlandingsareoneofthemostlikelyareasforintroductionofAIS.ConsequentlyboatlandingsareafocusofGLIFWCx19sAISsurveys.Sixty-threelandingsweresurveyedforaquaticandterrestrialinvasivespecies.Atotalof162planktonsampleswerecollectedandwillbeanalyzedthiswinterforthepresenceofzebramusselveligersandspinyorfishhookwaterfleas.Chineseorbandedmysterysnailswerefoundinoverhalfofthelakessurveyedandpurpleloosestrifewasfoundonhalfofthelakes.AsmallpioneerpopulationofEurasianwater-milfoilEWMwasfoundonWisconsinx19sAnvilLakeinJuly.Partneringagencieswerenotifiedandax1crapidresponsex1dwasorganizedtohand-pulltheEWM.Earlydetectionofinvasivespeciesbeforetheybecomelargeenvironmentallydamag-ingpopulationsmakeseradicationfeasibleandreducestheneedfortreatingwithherbicide.FormoreinformationoninvasivespeciesdistributionseeGLIFWCx19sGISmapsonGLIFWCx19swebsiteathttpmaps.glifwc.org.OdanahWis.x14GLIFWCassessmentcrewsandpartnersfromBadRiverFondduLacMoleLakeSt.CroixandUSFishandWildlifeServiceconductedfallelectrofish-ingsurveysoncededterritorywatersinMichiganMinnesotaandWisconsin.Duringthefalljuvenilewalleyeage0andage1arefoundfeedinginnearshorelakehabitatatnight.Electrofishingcrewssamplethesefishtodetermineyear-classstrengthfromnaturalreproductionortoevaluatestockingefforts.In2012GLIFWCcrewssurveyed119lakesincludingtenjointsurveyswithWiscon-sinDNRandtwowithMichiganDNR.SurveysinWisconsinincludedsomeofthelargeflowagessuchasthe13545-acreTurtleFlambeauFlowageandthe15300-acreChippewaFlowage.InMinnesotaGLIFWCUSFWSandFondduLaccrewscollaboratedtosurveyabout75oftheshorelineonMilleLacsLake.InMichiganthePortageandTorchLakesysteminHoughtonCountyweresurveyedinconjunctionwithMichiganDNR.Biologistsusethedatacollectedinthefallsurveystoindexyear-classstrengthandclassifywalleyepopulationsassustainedthroughnaturalreproductionorstocking.Thesesurveysalsoprovideanearlyindicationofpotentialdeclineinwalleyepopulations.Iffallsurveysshowfailednaturalreproductionseveralyearsinarowbiologistsknowsomemanagementactionmayneedtobetakentoprotectthewalleyepopulationandrestorenaturalreproduction.Thedatafromthe2012surveyswonx19tbefullyenteredproofedandfinalizeduntilmid-Decemberbutearlyreportsindicatethatasinmostyearssomewatershadgoodyear-classeswhileothershadweakeryear-classes.GLIFWCx19sinlandfisheriessectionwouldliketosaymiigwechtotheelectroshock-ingcrewmembersGLIFWCassessmentcrewssurveycededterritorywatersforjuvenilewalleyeAquaticplantmanagementworkshopplannedOnDecember52012researchscientistswillbeaddressingtribalconcernsonhowaquaticinvasiveornuisancenon-nativeplantsarebeingdealtwithincededterritorywaters.Thehalf-dayworkshopconveningattheLacCourteOreillesConven-tionCenterisopentoalltribalrepresentativesnaturalresourcestaffandinterestedtribalmembers.Informalpresentationswillallowplentyofopportunityfortribestogetques-tionsansweredontheprocessofaquaticplantmanagement.HighlightedwillbetheinteractionofmanoominandinvasivessuchasEurasianwatermilfoilandcurlyleafpondweed.Speakerswilldiscusstreatmentandmanagementoptionsfortheseinvasiveplantsfrommechanicalremovaltochemicalherbicideapplicationsconcentrationsanddosagesandtheeffectsofchemicalsonaquaticsystems.IfyouareinterestedinlearningmoreaboutthisfreeworkshoporplantoattendpleasecontactSueLemieuxGLIFWCat715.682.6619tobeaddedtotheparticipantlist.Anaccurateheadcountwillensurethatwehaveanadequateamountofmeetingmaterialsforallparticipants.ByDaraOlsonGLIFWCAquaticInvasiveSpeciesCoord.ByMarkLuehringGLIFWCInlandFisheriesBiologistOdanahWis.x14FormanyyearstheMinnesotaDepartmentofNaturalResourcesMnDNRhasusedafallgillnetassessmentsurveytohelpmonitorthewalleyepopula-tioninMilleLacsLake.Thebottom-setgillnetsusedinthissurveyare6-feetdeepandincludefive50-footpanelsof0.75x1d1.0x1d1.25x1d1.5x1dand2.0x1dbarmesh.Avarietyofdifferenthabitattypesareincludedinthesurveywhichisstandard-izedtoensurethatthesamelocationsaresampledatthesameapproximatetimeandwatertemperatureseachyear.Theresultingdataareusedinavarietyofdifferentwaysandareanimportantcomponentofthestockassessmentmodelsthatareupdatedeachyearbystateandtribalbiologists.Intheearly1980x19sthefallgillnetassessmentsurveyincluded32differentnearshorelocationsaroundtheperimeterofMilleLacsLake.In1998eightoffshoresamplinglocationswereaddedtothesurveyand12additionaloffshorelocationsweresubsequentlyaddedin2002.Earlierthisyearstateandtribalbiolo-gistsbeganexploringtheideaofdeployingsuspendedstandarddimensionnetsnearsomeofthedeepernettinglocationstolookathowwellwalleyearebeingsampledbythebottom-setnetsthathavehistoricallybeenusedbyMnDNR.Inlatesummerstateandtribalbiolo-gistsagreedonhowthisadditionalsamplingwouldoccurandmadeplansforthisworktobecompletedinconjunctionwiththefallgillnetassessmentsurvey.Atotalof21locationsinMilleLacsLakeweresampledwithsuspendednetsduringthefallof2012.ParticipantsinthiscooperativeprojectincludedpersonnelfromtheMilleLacsBandFondduLacBandMnDNRandGLIFWC.Stateandtribalpersonnelworkedtogetheronallaspectsoftheprojectwhichincludedsettingandliftingstandardandsuspendednetsprocessingcatchesandcol-lectingbiologicaldatafromcapturedfishanddatarecording.Althoughthecatchrateforwalleyefromthesuspendednetswasmuchlowerthanthatobservedinthestandardbottom-setnetsthistypeofsamplingwillneedtoberepeatedbeforeanyconclusionscanbedrawnwithrespecttotheresults.Lookingaheadstateandtribalbiolo-gistsarealsoplanningtoworktogetheronamark-recapturepopulationestimateforadultwalleyeinMilleLacsLakeduringthespringof2013.Aswiththemark-recapturestudiesfrom200220032004and2008resultsfromthe2013surveywillprovideanup-to-dateestimateofadultwalleyeabundancethatisindependentfromthemodel-generatedestimatesthatarereliedupontodetermineannualharvestablesurpluslevels.Stateanglersandtribalharvestersshouldexpecttoseesomewalleyethataremarkedwithplastictagswhichstickoutfromthesideofthefishnexttothedorsalfin.Thesetagswillbeyellowincolorandwillhavex1cMNDNRx1dplusanumberprintedonthem.TribalandGLIFWCcreelclerkswilldocumenttagnumbersastheyareencoun-teredintribalcatches.LikewiseMnDNRwillbecollectingsimilarinformationfromstateanglersthroughitsannualcreelsurveyonMilleLacsLake.CooperativefisheriessurveysinMilleLacsLakeByGLIFWCInlandFisheriesStaff