Role of IOOS in fisheries science and management?

1. Role of IOOS in fisheries science and management? Power of IOOS data Models of fish distribution & abundance Models useful for management Future applications

2. What can we measure without going to sea that fish “care” about?

3. Multivariate Analysis Final Environmental Variables Used • Depth (log-transformed) • Profile curvature • Slope (residuals vs. depth) • Sediment grain size IOOS Benthic • SST • 488 nm reflectance • 551 nm reflectance (residuals vs. 488 nm) • Cross-shore velocity • Variance in cross-shore velocity • Divergence trend CTD • Mixed-layer depth • Simpson’s PE (limited to top 30 m) • Bottom temp • Bottom salinity (residuals vs. depth)

4. Community Axis 1 Temp Depth 551 nm resids

5. CTD CTD • Mixed-layer depth • Simpson’s PE (limited to top 30 m) • Bottom temp • Bottom salinity (residuals vs. depth) IOOS • SST • 488 nm reflectance • 551 nm reflectance (residuals vs. 488 nm) • Cross-shore velocity • Variance in cross-shore velocity • Divergence trend Statistical models of fish-habitat association Example: Longfin squid (live one year) Prey for fish, seabirds, sharks, seals,whales Predator of young stages of fish & crabs (eat ~500,000 tons of prey yr; ~33 x annual production of Fluke) • Depth (log-transformed) • Profile curvature • Slope (residuals vs. depth) • Sediment grain size Benthic Habitat data

6. Preliminary squid model (adjusted R2 = 0.85) IOOS Increased model power ~12-20% CPUE= bottom temperature + sediment grain size + current divergence+N488 radiance +(depth x SST) + (cross x along shelf current v)

7. HF radar divergence & upwelling-downwelling potential Upwelling Down welling Longfin squid HF radar Divergence potential Divergence downwelling upwelling Hypothesis: Upwelling & 1’+2’ production => high squid growth & size dependent survival? Test in IOOS informed studies of habitat on movement, growth, mortality & reproductive rates

8. Models useful for Fisheries Management, stock assessement, spatial planning? Two examples: • Need natural (& fishing) mortalities for stock assessments • Spiny dogfish may eat 25,000 to 120,000 tons of squid a year. (Fishery harvest in 2007: 12,300 tons) • IOOS informed models of dogfish, squid distributions & habitat specific encounter rates. Where/when is natural mortality likely to be high? • Bycatch of butterfish in squid fishery • Under what habitat conditions do squid & butterfish co-occur? • Use IOOS to tell squid fisherman where to fish avoid large butterfish bycatch.

9. Temperature Salinity Optical backscatter bb532 bb(532)/c(532) Ecosystem Monitoring: Cold pool dynamics, Climate change & Fish Recruitment Recruitment of some species in MABtied to Cold Pool Dynamics (e.g. yellowtail flounder, surf clams) Timing of Cold Pool turnover & bottom warming may affect survival of early stages of some MAB species. What are the mechanisms?

10. Relevance to Resource Management? Online survey (43 Atlantic coast scientists & managers) Presentation to MAFMC (June 2009) Coordination with SSC Interviews about current research needs