introducing the working group on maturity assessment and ...knowledge of the reproductive biology of...

Introduction Knowledge of the reproductive biology of fish and crab stocks is critical to stock assessment estimates of the reproductive potential (typically measured as spawning stock biomass) of the stock. Reproductive potential is a factor often used to calculate biological reference points used for fisheries management. While quantitative assessment of reproductive parameters is essential for stock assessment calculations, qualitative information on spawning dynamics is also important as fisheries management has begun taking an ecosystem approach to management. In addition, understanding the spatial and temporal dynamics of fish spawning is important for managing fishery impacts on protected apex predators. MARVLS at the AFSC How it all started… Reproductive studies at the NMFS Alaska Fisheries Science Center (AFSC) have historically been conducted as independent studies, meant to inform particular stock assessments. It became apparent that the AFSC would benefit from a more integrated approach to collect reproductive life history information. This approach demanded the prioritization of future research by identifying knowledge gaps and management challenges. This led to the formation of the Maturity Assessment, and Reproductive Variability of Life Stages (MARVLS) working group and resulted in a reading group, and an AFSC workshop and white paper detailing the status of reproductive biology and maturity research at the AFSC. MARVLS GOALS • Share methods and knowledge of fish reproductive studies across all science Centers • Evaluate and standardize field and Lab methodologies whenever possible within and across NMFS science centers • Field Collection procedures • Histological techniques • Fecundity analysis • Databases • Nomenclature • Data Analysis of age and length at 50% maturity (A 50 and L 50 ) • Training methods for field collection, histological reading, and data analysis • Work towards integrating reproductive variability into stock assessment and management of fish and crab species • Most of all connect with your inner fish squeezer and listen to Captain A 50, our super hero! MARVLS goes National TimeLine 2013 • AFSC reading group on reproductive maturity • AFSC workshop and white paper on the status of reproductive biology research at the AFSC. 2014 • National MARVLS workshop hosted by AFSC in Seattle . Attended by Scientists from all NMFS science centers 2015 • MARVLS group organizes a symposium at the American Fisheries Society Symposium in Portland Introducing the Working Group on M aturity A ssessment and R eproductive V ariability of L ife Stages FUTURE PLANNED EVENTS 2016 • MARVLS group participates in PICES them session in San Diego, CA • 2 nd MARVLS national workshop in La Jolla, CA 2017 • MARVLS group plans to submit ICES theme session for meeting in Florida DISTANT FUTURE Marvls becomes a worldwide phenomenon A reading group was established in 2013 with interested scientists discussing papers and tackling current issues and challenges connected with histology, fecundity and other reproductive ecology questions. It was soon apparent that scientists from all NMFS science centers working on reproductive ecology and life history were interesting in a platform allowing to share knowledge and exchange information. Contact Information If you would like to receive further informationor would like to join MARVLs don’t hesitate to contact: Susanne McDermott [email protected] NOAA, AFSC, Seattle Sandi Neidetcher [email protected] NOAA, AFSC, Seattle Christina Conrath [email protected] NOAA, AFSC, Kodiak Susanne McDermott, Sandi Neidetcher, Christina Conrath, Paul Spencer Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA The recommendations and general contents presented in this poster do not necessarily represent the views or official position of the Department of Commerce, the National Oceanic and Atmospheric Administration or the National Marine Fisheries Service. Strong DATA make strong MODELS!

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Page 1: Introducing the Working Group on Maturity Assessment and ...Knowledge of the reproductive biology of fish and crab stocks is critical to stock assessment estimates of the reproductive

MARVLS at the AFSCHow it all started…ReproductivestudiesattheNMFSAlaskaFisheriesScienceCenter(AFSC)havehistoricallybeenconductedasindependentstudies,meanttoinformparticularstockassessments.ItbecameapparentthattheAFSCwouldbenefitfromamoreintegratedapproachtocollectreproductivelifehistoryinformation.Thisapproachdemandedtheprioritizationoffutureresearchbyidentifyingknowledgegapsandmanagementchallenges.ThisledtotheformationoftheMaturityAssessment,andReproductiveVariabilityofLifeStages(MARVLS)workinggroupandresultedinareadinggroup,andanAFSCworkshopandwhitepaperdetailingthestatusofreproductivebiologyandmaturityresearchattheAFSC.

MARVLS GOALS• SharemethodsandknowledgeoffishreproductivestudiesacrossallscienceCenters

• EvaluateandstandardizefieldandLabmethodologieswheneverpossiblewithinandacrossNMFSsciencecenters

• FieldCollectionprocedures• Histologicaltechniques• Fecundityanalysis• Databases• Nomenclature• DataAnalysisofageandlengthat50%maturity(A50andL50)

• Trainingmethodsforfieldcollection,histologicalreading,anddataanalysis

• Worktowardsintegratingreproductivevariabilityintostockassessmentandmanagementoffishandcrabspecies

• MostofallconnectwithyourinnerfishsqueezerandlistentoCaptainA50,oursuperhero!

MARVLS goes National

TimeLine2013• AFSCreadinggroupon

reproductivematurity• AFSCworkshopand

whitepaperonthestatusofreproductivebiologyresearchattheAFSC.

2014• NationalMARVLS

workshophostedbyAFSCinSeattle.AttendedbyScientistsfromallNMFSsciencecenters

2015• MARVLSgroup

organizesasymposiumattheAmericanFisheriesSocietySymposiuminPortland

Introducing the Working Group on

MaturityAssessment and Reproductive Variability of Life Stages

FUTUREPLANNEDEVENTS2016• MARVLSgroup

participatesinPICESthemsessioninSanDiego,CA

• 2nd MARVLSnationalworkshopinLaJolla,CA

2017• MARVLSgroupplans

tosubmitICESthemesessionformeetinginFlorida

DISTANTFUTUREMarvls becomesaworldwidephenomenon

Areadinggroupwasestablishedin2013withinterestedscientistsdiscussingpapersandtacklingcurrentissuesandchallengesconnectedwithhistology,fecundityandotherreproductiveecologyquestions.ItwassoonapparentthatscientistsfromallNMFSsciencecentersworkingonreproductiveecologyandlifehistorywereinterestinginaplatformallowingtoshareknowledgeandexchangeinformation.

Contact InformationIfyouwouldliketoreceivefurtherinformationorwouldliketojoinMARVLsdon’thesitatetocontact:SusanneMcDermott [email protected] NOAA,AFSC,SeattleSandiNeidetcher [email protected] NOAA,AFSC,SeattleChristinaConrath [email protected] NOAA,AFSC,Kodiak

Susanne McDermott, Sandi Neidetcher, Christina Conrath, Paul SpencerAlaska Fisheries Science Center, National Marine Fisheries Service, NOAA

The recommendations andgeneral contentspresentedinthisposterdonotnecessarily represent theviews orofficialpositionoftheDepartment ofCommerce, theNationalOceanic andAtmosphericAdministrationortheNationalMarineFisheries Service.

Strong DATA make strong MODELS!

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