Fisheries Management and Aquaculture

CFRE Student with Salmon

FisheriesManagementandAquaculture

ContinuereadingtoseehowCFREcontributestofisheriesmanagementandaquaculture.

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LakeSturgeon

CFREfaculty,staff,andstudentshaveworkedwithpersonnelfromtheMichiganDepartmentofNaturalResourcesandtheUSFishandWildlifeServicetounderstandthepopulationcharacteristics(Baumanetal.2011)andmovements(Gerigetal.2011)ofLakeSturgeonintheSt.MarysRiver.

Currently,wearecollaboratingwithseveralstate,federal,provincial,andtribalagenciestoestablishanarrayofacousticreceiversintheriverthatwillallowustogainfurtherinsightsintothemovementsandhabitatuseofsub-adultandadultLakeSturgeon.Whatwelearnwillhelpguidemanagementofthisculturallyandecologicallyimportantnativespecies,whichislistedasthreatenedbytheStateofMichigan.

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USGSLarvalFish

LSSUcontinuestoworkwithEdRoseman(USGS)tobetterunderstandlarvalfishdynamicsintheSt. MarysRiver.

Since2013,wehavesampledlarvalfishinthe LittleRapidsarea where hydrological connectivitywasrestoredin2016-2017.In2021,wealsosampledtheCloverlandhydropowercanal.

Thegoalsoftheseprojectsareto:

  • UnderstanduseoftherestoredLittleRapidssitebyspawningfishes
  • GaininsightsintowhichlarvalfishesareproducedintheriverandwhichdriftdownstreamfromLakeSuperiorintotheriver

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LakeWhitefishRecruitment

LakeWhitefishareaneconomically,recreationally,andculturallyimportantspeciesintheGreatLakes.However,thisimportantspecieshasbeenonthedeclinesincethe1990s,coincidingwiththeinvasionofzebraandquaggamussels.Invasivemusselshaveprofoundimpactsonaquaticsystems,especiallyinthelowerfoodweb.OnehypothesisforLakeWhitefishdeclinesisdecreasedzooplanktonprey,acriticalfoodsourceforfishduringtheirlarvalstage.

CFRE,incollaborationwithseveraltribal,state,andfederalagenciesisconductingresearchonLakesMichigan,Huron,andSuperiortofurtherunderstandthecausesofdecliningLakeWhitefishpopulations.

PhotoCredit:LittleTraverseBayBandsofOdawaIndians

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FishGutMicrobiome

Thegutmicrobiomeisknowntoaffectthehealth,physiology,andbehaviorofvertebrates,butverylittleisknownabouttheserelationshipsinfishes.WithsupportfromtheCooperativeInstituteforGreatLakesResearch,CFREpersonnelareworkingwithcollaboratorsfromSt.LouisUniversityandWashingtonUniversityinSt.LouistobegintounravelthemysteriesofthegutmicrobiomeandviromeinAtlanticSalmon.Specifically,wearedetermininghowthegutmicrobiomeandviromediffer:

  • Betweenage-0andadultAtlanticSalmon
  • BetweenadultAtlanticSalmonrearedatdifferenthatcheries
  • Withinage-0salmonbeforeandafterbeingvaccinatedforBacterialKidneyDisease

Weanticipatethatourresultswillleadtoadjustmentsinhatcheryrearingpracticestomaximizesurvivalofstockedsalmon. 

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