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When overfishing is the sustainable option

Author

Listed:
  • Katherine A. Cresswell

    (University of Tasmania
    Commonwealth Scientific and Industrial Research Organisation (CSIRO)
    Centre for Marine Socioecology (CMS))

  • L. Richard Little

    (Commonwealth Scientific and Industrial Research Organisation (CSIRO))

  • Klaas Hartmann

    (University of Tasmania)

  • Caleb Gardner

    (University of Tasmania)

  • John P. Keane

    (University of Tasmania)

  • Scott D. Ling

    (University of Tasmania)

  • Stephen C. Bradshaw

    (University of Tasmania)

Abstract

Climate change is driving species to colonize new ranges, sometimes causing uncontrollable damage. Here we present a remarkable scenario in which government-supported incentives have driven the establishment of a commercial fishery targeting a destructive urchin, intentionally encouraging overfishing to protect kelp ecosystems. This ecosystem management strategy is paradoxical in the objective to overfish sustainably. Due to consistent and increasing larval influx, the eradication of urchins in their extended range is implausible. Management, therefore, focuses on maintaining urchin density below a critical threshold while ensuring a viable commercial fishery for long-term species control. Our model dissects the fishery’s impact, offering practical strategies for controlling a destructive range extender given economic and spatial dynamics. Beyond the implications of subsidizing a commercial fishery to counteract the impacts of climate change, our study explores the conflict between exploitation and conservation, challenging traditional views and presenting practical pathways to sustainability.

Suggested Citation

  • Katherine A. Cresswell & L. Richard Little & Klaas Hartmann & Caleb Gardner & John P. Keane & Scott D. Ling & Stephen C. Bradshaw, 2025. "When overfishing is the sustainable option," Nature Sustainability, Nature, vol. 8(5), pages 498-507, May.
    • Handle: RePEc:nat:natsus:v:8:y:2025:i:5:d:10.1038_s41893-025-01526-8
    DOI: 10.1038/s41893-025-01526-8
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