Baker, Jacoby

Hamilton, Scott L.

Kashef, Neosha S

Kashiwabara, Lauren

Logan, Cheryl

Palmisciano, Melissa

Sogard, Susan

Stafford, David

English

Digital Commons @ CSUMB (California State University, Monterey Bay)

California State University, Monterey Bay Digital Commons @ CSUMB CSU Student Research Competition Delegate Entries Undergraduate Research Opportunities Center (UROC) 4-26-2019 Short-term Effects of Extreme Upwelling on Juvenile Gopher Rockfish (Sebastes carnatus) Lauren Kashiwabara California State University, Monterey Bay Jacoby Baker California State University, Monterey Bay Melissa Palmisciano California State University, Monterey Bay Neosha S. Kashef David Stafford See next page for additional authors Follow this and additional works at: https://digitalcommons.csumb.edu/uroc_csusrc Recommended Citation Kashiwabara, Lauren; Baker, Jacoby; Palmisciano, Melissa; Kashef, Neosha S.; Stafford, David; Sogard, Susan; Hamilton, Scott L.; and Logan, Cheryl, "Short-term Effects of Extreme Upwelling on Juvenile Gopher Rockfish (Sebastes carnatus)" (2019). CSU Student Research Competition Delegate Entries. 16. https://digitalcommons.csumb.edu/uroc_csusrc/16 This Presentation is brought to you for free and open access by the Undergraduate Research Opportunities Center (UROC) at Digital Commons @ CSUMB. It has been accepted for inclusion in CSU Student Research Competition Delegate Entries by an authorized administrator of Digital Commons @ CSUMB. For more information, please contact digitalcommons@csumb.edu. Authors Lauren Kashiwabara, Jacoby Baker, Melissa Palmisciano, Neosha S. Kashef, David Stafford, Susan Sogard, Scott L. Hamilton, and Cheryl Logan This presentation is available at Digital Commons @ CSUMB: https://digitalcommons.csumb.edu/uroc_csusrc/16 Lauren Kashiwabara, Jacoby Baker, Melissa Palmisciano, Neosha S Kashef, David Stafford, Dr. Susan Sogard, Dr. Scott L. Hamilton, and Dr. Cheryl LoganSHORT-TERM EFFECTS OF EXTREME UPWELLING ON VENTILATION RATES IN JUVENILE GOPHER ROCKFISHCalifornia State University, FullertonApril 26, 2019UpwellingUpwellingUpwelling• Cold-nutrient, rich water• Low dissolved oxygen• Low pHUpwelling and Climate ChangeClimate change is causing • More intense upwelling predicted by the end of the century• Lower dissolved oxygen• Lower pH (more acidic)Juvenile Gopher RockfishJuveniles fish that are approximately four to six months oldGopher 1-2 month pelagic larval stage; recruits to kelp canopy April-MayRockfish over 60 species along the west coast of the US; Ecologically/economically important; Slow growing and reproducingLabeled kelpWhy ventilation?Effects of low DO• Need to get more oxygen across gills and into blood• Less oxygen means lowered ability to bind oxygen to hemoglobin• Essential in brain functionEffects of low pH•Many body functions are pH sensitive•Fish use gills for ion regulation and acid-base balance regulationHypothesisQuestion: How will juvenile gopher rockfish ventilation rates respond to a short-term upwelling cycle? H1: Juvenile gopher rockfish will increase ventilation rates when exposed to an upwelling eventH2: Juvenile gopher rockfish will decrease ventilation rates when returned to ambient conditions after an upwelling exposureSample CollectionSample CollectionTreatmentsControl Groupn=10•8.0 pH•8.0 mg O2 / LUpwelling Groupn=10•7.3 pH•2.0 mg O2 / L1 43 5 6 87 92 100Upwelling Level:7.3 pH2.0 mg O2 / LControl Level:8.0 pH8.0 mg O2 / LDaysUpwelling Phase Relaxation PhaseExperimental DesignFish Hammocks and Go ProsSJSU IACUC protocol # 10071 43 5 6 87 92 100Upwelling Level:7.3 pH2.0 mg O2 / LControl Level:8.0 pH8.0 mg O2 / LDaysUpwelling Phase Relaxation PhaseExperimental DesignMore videosResults: How did the numbers stack up? Relaxation PhaseResults: How did the numbers stack up? Relaxation PhaseDiscussion: Could they recover? Ventilation rates ~50% higher• Reduced energy available for growth and locomotion, susceptible to predation (energy budget)• Must compensate for upwelling conditionsDiscussion: Could they recover? Ventilation rates ~50% higher• Reduced energy available for growth and locomotion, susceptible to predation (energy budget)• Must compensate for upwelling conditionsVentilation rates return to normal• Fish appear to recover after extreme upwelling when returned to ambient levelsFuture (Current!) Work• Quantify metabolic cost of increased ventilation • Look at effects on the molecular level• Identify protein activity• Logan lab members• Friends and family • Everyone for listeningAcknowledgementsQuestions?

Short-term Effects of Extreme Upwelling on Juvenile Gopher Rockfish (Sebastes carnatus)

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Short-term Effects of Extreme Upwelling on Juvenile Gopher Rockfish (Sebastes carnatus)

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