Collaborative Science Is Key to Conserving Highly Mobile Marine Species
Research from Pew marine fellows is a critical resource for helping to protect large ocean species and can offer invaluable input as a network of high seas marine protected areas (MPAs) nears reality.
In September 2025, the United Nations General Assembly passed the high seas treaty, which sets rules to ensure the conservation and sustainable use of marine biodiversity in international waters that are not governed by a single nation. The agreement also establishes a legal framework to create the MPAs beginning this month.
Bending back the curve of shark and ray biodiversity loss
Sharks and rays are sentinels of the state of the ocean. Since the mid-twentieth century, overall abundance has declined by nearly 65% and over one-third (37.5%) of species are threatened, causing widespread changes in community structure. This crisis stems from unregulated fisheries expansion coupled with inadequate catch-and-trade monitoring that fail to account for the complexity of shark and ray products, their use and global trade flows.
How to ensure social outcomes in restoration
Effective restoration projects must generate meaningful benefits for both nature and people. While ecological gains are often well-documented, social outcomes — such as livelihoods, governance, well-being, equity, and cultural identity — are still less consistently measured and integrated across restoration literature and practice. This brief outlines why social outcomes matter and how to ensure
Socio-environmental movements emerge as key global guardians of biodiversity amid rising violence
A new study published in the Proceedings of the National Academy of Sciences reveals that organized civil society and social mobilization are key, yet often unrecognized, agents of global biodiversity conservation. By analyzing a global dataset of 2,801 socio-environmental mobilizations from the Environmental Justice Atlas (EJAtlas), the research identifies that local struggles against polluting industries are critical for protecting the planet's most sensitive, biodiverse regions.
Calm seas can drive coral bleaching, research reveals
New research by Monash University and the ARC Center of Excellence for the Weather of the 21st Century analyzed close to three decades of weather data during the coral bleaching season and identified the prevalence of "doldrum days," and the absence of the trade winds, as a key factor in the mass bleaching events threatening the Great Barrier Reef.
Ocean Travellers: Safeguarding Critical Habitats For Migratory Sharks And Rays
This report presents the first global overview of Important Shark and Ray Areas (ISRAs) for species listed under the Convention on the Conservation of Migratory Species of Wild Animals (CMS) and its daughter agreement, the Memorandum of Understanding for the Conservation of Migratory Sharks (Sharks MOU). ISRAs are identified through a standardized, expert-driven process to map habitats essential for shark, ray, and chimaera species.
Guidebook for assessing and improving social equity in marine conservation
his guidebook is based on an understanding that social equity refers to fairness and justice with respect to the ways that people are recognised, treated, or impacted by conservation initiatives. It is also grounded on a common framework for assessing equity that includes six dimensions: recognitional, procedural, management, environmental, distributional, and contextual and structural equity.
Marine protected areas as living labs? Lessons learned & future perspectives
Marine Protected Areas (MPAs) management usually involves bringing multiple stakeholders together, to construct policy-relevant research programs and science-based tools for adaptive management. Here, we present the conclusions of a transdisciplinary workshop that aimed at reviewing experiences in the co-design of EBM research in MPAs. We find that MPAs represent powerful instruments for conducting real-world experiments, de facto acting as living labs in support of ocean governance.
Relative abundance and diversity of sharks and predatory fishes across Marine Protected Areas of the Tropical Eastern Pacific
Marine Protected Areas (MPAs) in the Tropical Eastern Pacific (TEP) support globally distinct reef fish populations, which exhibit differences between the remote oceanic islands and continental coast. While oceanic island MPAs typically support large abundances of sharks and large predatory teleost (bony) fishes, coastal MPAs show increasing signs of depletion. We deployed stereo-Baited Remote Underwater Video systems (stereo-BRUVs) to assess reef fish community structure across seven MPAs in the region.
