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Updated: Nov 26, 2025

Author Spotlight: Developing Efficient Cryopreservation and Biobanking Technologies for Global Reef Restoration

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Conservation: Goldilocks Nations for Restoring Reef Sharks.

Nicholas K Dulvy¹, Helen F Yan¹

¹Earth to Ocean Group, Department of Biological Sciences, Simon Fraser University, Burnaby, BC V5A 1S6, Canada.

Current Biology : CB

|December 8, 2020

Summary

Global surveys reveal significant coral reef shark depletion across eight nations. Priority nations with strong governance and abundant sharks are identified for conservation efforts.

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Area of Science:

Marine Biology
Conservation Science
Fisheries Management

Background:

Coral reef ecosystems worldwide face threats from overfishing and habitat degradation.
Sharks, as apex predators, play a crucial role in maintaining marine ecosystem health and balance.
Declining shark populations can have cascading negative effects on reef biodiversity and resilience.

Purpose of the Study:

To conduct the first global assessment of coral reef shark populations using baited video surveys.
To identify nations experiencing widespread shark depletion and functional extinction.
To pinpoint 'Goldilocks' nations with suitable governance and shark abundance for recovery initiatives.

Main Methods:

Utilized baited remote underwater video (BRUV) systems for a global survey of coral reef sharks.
Collected and analyzed video data from multiple nations to quantify shark abundance and diversity.
Assessed national governance structures and existing fisheries management policies relevant to shark conservation.

Main Results:

The study documented widespread depletion and functional extinction of coral reef sharks in eight surveyed nations.
Significant declines in shark populations were observed across various reef systems globally.
Identified specific nations exhibiting a favorable combination of governance and shark presence for potential recovery.

Conclusions:

Urgent conservation interventions are needed to address the global decline of coral reef sharks.
Effective fisheries management and strong governance are critical for successful shark population recovery.
Targeted conservation strategies in identified 'Goldilocks' nations offer a promising pathway for restoring depleted shark populations.