Conservation and Management of Marine Turtle Populations

Marine turtles have endured millennia of evolutionary change yet face unprecedented anthropogenic pressures. Bycatch in fisheries, coastal development, pollution and climate-driven shifts in nesting beach temperatures threaten population viability. Conservation and management strategies now adopt an ecosystem-based approach, combining satellite telemetry, genetic stock identification and long-term monitoring of nesting success. Protective measures range from patrols on nesting beaches and nest relocation to the establishment of marine protected areas and transboundary agreements under international treaties. Regional Management Units (RMUs) refine these efforts by defining biologically coherent population segments and tailoring actions to local threat profiles. Adaptation to climate warming necessitates active intervention, such as shading nests or relocating eggs to maintain balanced sex ratios in species with temperature-dependent sex determination. Community engagement and fishery bycatch mitigation, through time–area closures and gear modifications, remain central to reducing mortality at sea. Emerging methodologies—stable isotope analysis, contaminant biomarker assays and deep-habitat mapping—are improving our understanding of foraging habitats and pollutant burdens. Effective management now relies on integrating these tools within collaborative frameworks that span nesting sites, foraging grounds and migratory corridors, ensuring that conservation measures are both scientifically informed and socioeconomically feasible.

Research from Nature Portfolio

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Conservation and Management of Marine Turtle Populations publication trend

The graph below shows the total number of articles in conservation and management of marine turtle populations across all publications each year (not limited to Nature Index journals).

Technical terms

Bycatch: Incidental capture of non-target species during fishing operations.

Regional Management Unit (RMU): Spatially defined population segment used to guide conservation and management actions at nested scales.

Phenological shift: Change in the timing of biological events, such as nesting, in response to environmental factors.

Mesophotic ecosystem: Deep coral habitat at depths of 30–150 metres serving as critical foraging grounds.

Temperature-dependent sex determination (TSD): Mechanism by which incubation temperature determines offspring sex in reptiles.

References

1. Remote submerged banks and mesophotic ecosystems can provide key habitat for endangered marine megafauna. Science Advances (2024).
2. Adaptation of sea turtles to climate warming: Will phenological responses be sufficient to counteract changes in reproductive output?. Global Change Biology (2023).
3. Regional Management Units for Marine Turtles: A Novel Framework for Prioritizing Conservation and Research across Multiple Scales. PLOS ONE (2010).
4. Global Conservation Priorities for Marine Turtles. PLOS ONE (2011).
5. Impacts of fisheries bycatch on marine turtle populations worldwide: toward conservation and research priorities. Ecosphere (2013).
6. Stable Isotope Tracking of Endangered Sea Turtles: Validation with Satellite Telemetry and δ15N Analysis of Amino Acids. PLOS ONE (2012).
7. Geographic Patterns of Genetic Variation in a Broadly Distributed Marine Vertebrate: New Insights into Loggerhead Turtle Stock Structure from Expanded Mitochondrial DNA Sequences. PLOS ONE (2014).
8. Identifying biomarkers of pollutant exposure in ocean sentinels: Characterisation and optimisation of B-esterases in plasma from loggerhead turtles undergoing rehabilitation. Chemosphere (2023).