Restoration of the Catarina Scallop in the Ensenada de La Paz, Mexico A group project submitted in partial satisfaction of the requirements for the degree Master of Environmental Science & Management

7 Executive Summary 8 Project significance 12 Objectives 14 Background 15 Small-scale fisheries 15 About the Species 15 The Catarina Scallop Fishery 16 Causes of Collapse 17 The Restoration of the Ensenada de La Paz 18 Stakeholders 18 How does the restoration work? 19 Challenges to the effort 20 Methods 22 Bioeconomic model 22 Hydrological Isolation 22 Life Cycle 23 Aquaculture 29 Seeding 32 Recovery Scenarios 34 Model analysis 38 Outputs 38 Sensitivity Analysis 40 Monte Carlo simulation 40 Results 41 Habitat Experiment 41 Scallop recovery 41 Population Growth 41 Fishery 43 Economic feasibility 44 Catch value 44 Fishery 45 Aquaculture 47 Habitat restoration 48 Surveillance costs 48 Tradeoff analysis 49