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

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

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

Temp Depth 551 nm resids

Statistical models of fish-habitat association Benthic Depth (log-transformed) Profile curvature Slope (residuals vs. depth) Sediment grain size IOOS 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) CTD Habitat data 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)

CPUE= bottom temperature + sediment grain size + current divergence + N488 radiance +(depth x SST) + (cross x along shelf current v) Preliminary squid model (adjusted R 2 = 0.85) IOOS Increased model power ~12-20%

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

Models useful for Fisheries Management, stock assessement, spatial planning? 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. Two examples:

Temperature Salinity b b (532)/c(532) Optical backscatter b b 532 Ecosystem Monitoring: Cold pool dynamics, Climate change & Fish Recruitment Recruitment of some species in MAB tied 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?

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