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Advancements in Ecosystem-Based Fisheries Management and Modelling in Australia

This document explores the successes and challenges in ecosystem-based fisheries management (EBFM) and modelling techniques in Australia. It highlights key modelling strategies, including single species and multispecies approaches, emphasizing the importance of management strategy evaluation. The discussion encompasses various ecosystem models, such as Atlantis, and their application in managing biophysical processes within temperate marine ecosystems. It also addresses lessons learned from previous modelling experiences, the necessity for improved data monitoring, and the need for new governance measures to enhance fisheries management strategies.

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Advancements in Ecosystem-Based Fisheries Management and Modelling in Australia

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  1. EBFM and Modelling Beth Fulton CSIRO Marine Research

  2. Australian Modelling Successes • Successes and failures with all types (just tools) • single species (linked) • multispecies (target, bycatch, habitat) EBFM and Modelling

  3. Multispecies Model Success • Sainsbury on Northwest Shelf • alternative hypotheses (identified time to reduce uncertainty) • evaluated alternative long & short term strategies (& costs) EBFM and Modelling

  4. Australian Modelling Successes • Successes and failures with all types (just tools) • single species (linked) • multispecies (target, bycatch, habitat) • Ecopath (fisheries-marine mammal overlap) • ecosystem models (biophysical, multi-sector; Atlantis, InVitro) EBFM and Modelling

  5. Management Strategy Evaluation • Unifying factor in success = Management Strategy Evaluation • Process = consultative • science, management and industry • Models (single species, multispecies, ecosystem) EBFM and Modelling

  6. Management Strategy Evaluation • Exploitation • Observation • Biophysical • Management EBFM and Modelling

  7. Management Strategy Evaluation • Exploitation • Observation • Biophysical • Management EBFM and Modelling

  8. Strategy • A B C D E • Indicator • I II III IV MSE Reporting EBFM and Modelling

  9. MSE Ecosystem Model - Atlantis • Biological and physical • main processes and groups thought important in temperate marine ecosystems EBFM and Modelling

  10. 0 50 150 250 750+ Pelagic Epibenthic Sediment MSE Ecosystem Model - Atlantis • Within each cell have ecology (51 functional groups/species) and fisheries (32 fleets) EBFM and Modelling

  11. MSE Ecosystem Model - Atlantis • Biological and physical • main processes and groups thought important in temperate marine ecosystems • Anthropogenic • fishing (including discarding, habitat modification etc) • other (changing nutrient loads, temperature profiles) • Fleet dynamics and management • multiple fleets (ports, displacement, targeting, gear) • management (closures, effort control, quotas, mitigation, changing gear, changing practices) • Monitoring and assessment • data from surveys and fisheries records (with error) • common assessment models and index estimation EBFM and Modelling

  12. EEZ Claimable shelf Previous MSE Ongoing MSE MSE Locations and Lessons • Modelling lessons • scales/focus • formulations • Ecological indicators • simpler = better • Data/monitoring gaps shown • Value of qualitative info • Trade-offs always involved • highlights issues missed by assessments • Adds value to models EBFM and Modelling

  13. Issues For Discussion • Examples of models in EBFM • Changes in governance/policy/administration required • Models we’ve overlooked (e.g. from other fields) • New models/data required • functional responses, interactions etc • handling uncertainty • fitting to data, making sure models and questions match EBFM and Modelling

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