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Climate, Ecosystems, and Fisheries A UW-JISAO/Alaska Fisheries Science Center Collaboration Jeffrey M. Napp Alaska Fisheries Science Center NOAA Fisheries.

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Presentation on theme: "Climate, Ecosystems, and Fisheries A UW-JISAO/Alaska Fisheries Science Center Collaboration Jeffrey M. Napp Alaska Fisheries Science Center NOAA Fisheries."— Presentation transcript:

1 Climate, Ecosystems, and Fisheries A UW-JISAO/Alaska Fisheries Science Center Collaboration Jeffrey M. Napp Alaska Fisheries Science Center NOAA Fisheries

2 FAQS Collaborations address NOAA Strategic Goals 1 & 2. Two administrative mechanisms: straight JISAO and JISAO/School of Aquatic and Fisheries Science. Involves two of the three Divisions at the Seattle campus of the AFSC. Presently about 8-10 JISAO projects at the AFSC. Funding from a variety of sources including SSLRP, NPCREP, FATE, NPRB

3 Ecosystem-Based Scientific Advice State-of-the-Art Population Assessments including uncertainty Research on Effects of Fishing on Habitat Improve understanding of Climate effects on Ecosystem Production Development and Improvement of Predictive Models Research on Ecosystem Effects of Fishing P. Livingston

4 Mean Species Distributions Mean bottom temperatures in warm/cold years In cold years, cod are blocked offshore from the capelin by coldwater mass. No species interaction. In warm years, thermal gateways open, allowing cod to enter the nearshore capelin habitat and feed, opening new species interactions. K. Bailey

5 Changing Climate & Populations Thermal Experience Temporal Diet Composition Prey Energy Density Consumer Size & Growth Predator Energy Density Bioenergetics Model Consumption Estimate Consumer Size Structure & Abundance Population Consumption Mazur & Wilson

6 S. Hinckley

7 An Ecosystem Approach to Management Physical Forcing Biological Interactions Management Status of Stocks and Ecosystem Catch Level Closed Areas Discards Gear Effort + + Modified from P. Livingston Indices Models Observing Systems Predict Understand

8 Development and Improvement of Predictive Models P. Livingston

9 Individual based model for walleye pollock in Gulf of Alaska to study recruitment variability Food model NPZ for pollock Coupling models SPE M Juvenile Index IBM Larval Index NP Z The correlation between larval index and Age-2 stock assessment during late 70’s to late 80’s was 0.79 R2=0.79 Poor correlation between juvenile index and Age-2 stock assessment after late 80’s. Need to include food (Euphausiids) and predation and account for more juvenile behavior Shifting control recruitm ent Hydrodynamic model output: Salinity, temperature, velocity fields

10 Wildebuer et al., (2002)

11 Ecosystem Effects of Fishing: Ecosystem Indicators Fish community size spectrum Total catch and trophic level of catch

12 Understanding and forecasting ecosystem response to changing climate of the North Pacific North Pacific Climate Regimes and Ecosystem Productivity

13 Fisheries Acoustics Research Laboratory To understand and apply acoustic technologies to fisheries management and aquatic ecology. To quantify and understand spatiotemporal distributions, dynamics, and interactions of aquatic organisms. Walleye Pollock predicted backscatter at 70 kHz (J. Horne, unpublished)


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