Optimal Spatial Fishery Management for the Southern California Bight Dave Siegel, Chris Costello, Satoshi Mitarai (UCSB), Jim McWilliams & Charles Dong.

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Optimal Spatial Fishery Management for the Southern California Bight Dave Siegel, Chris Costello, Satoshi Mitarai (UCSB), Jim McWilliams & Charles Dong (UCLA) A Coastal Environmental Quality Initiative (CEQI) Project

A CEQI Project Assess optimal fishery design for SoCal Bight Combine established expertise in modeling California coastal circulation (UCLA) Larval dispersal & optimal fishery management (UCSB) Timeline , modeling larval of dispersal (awarded) , develop optimal fishery management (proposed)

Lagrangian Particle Tracking Implement Lagrangian particle tracking in ROMS by Dong and McWilliams (2007) Single-day release from San NicholasRelease sites Blue lines: 30-day trajectories Red dotes: particle positions after 30 days Blue circles: area covered by a site (5-km radius) Particles are released every 6 hours every 1km

Lagrangian PDFs Computed from Lagrangian particle trajectories From San Nicholas, as a function of travel time Used particles released from 01/1996 to 12/1999 From 9 different sites 30-day travel time

Fishery Management Max {a*Stock + Profit}, for different weights, a # of adults at x in year n+1 # of recruits to x from everywhere # of survivors at x in year n = + # of larvae produced at y Fraction of larvae transported to x Recruitment success (%) xy Harvesting (fishery management) Connectivity (assessed from Lagrangian PDF)

Publications in Prep Mitarai et al., for JGR - Oceans “Another Place for Physical Oceanography: Quantifying Connectivity in the Coastal Ocean” Watson et al., for MEPS “Roles of larval life history and interannual variability on modeled connectivity patterns” Chris et al., for Science “Optimal fishery management scenarios for the SoCal Bight”