Fisheries Dynamics and Management in Marine Ecosystems

Fisheries dynamics in the world’s oceans are governed by the interaction of biological processes, environmental variability and human extraction. Marine species exhibit complex population fluctuations driven by recruitment success, growth rates and natural mortality, all of which respond to climate-related drivers such as sea surface temperature and ocean currents. Traditional single-species management has gradually given way to ecosystem-based approaches, which account for trophic interactions, habitat connectivity and broader ecosystem services. Technological advances in acoustic surveys, satellite remote sensing and individual-based models now enable more accurate estimates of biomass distribution, migration pathways and stock connectivity. At the same time, socioeconomic pressures—from small-scale coastal fisheries to large-scale industrial fleets—are shaping governance frameworks that aim to balance food security, livelihoods and conservation. Spatial tools such as marine protected areas and temporal measures including seasonal closures have been shown to bolster resilience and recovery of overexploited stocks, especially in upwelling zones where primary productivity underpins small pelagic fish productivity. Ecosystem models and participatory management are increasingly deployed to evaluate trade-offs and to guide adaptive decision-making in the face of rapid environmental change.

Research from Nature Portfolio

One recent analysis has documented the influence of climate change on the distribution of small pelagic fish along a major eastern boundary upwelling system. Over several decades of combined trawl sampling and acoustic surveys, researchers observed a systematic northward shift in key species as rising sea surface temperatures and altered wind-driven upwelling regimes modified habitat suitability. The study highlights how changes in upwelling intensity can decouple traditional cooling effects and drive region-wide shifts in biomass, with direct implications for shared-stock management and regional food security. It also underscores the necessity of cross-boundary cooperation to implement adaptable harvest strategies that reflect evolving species distributions and productivity patterns.

Fisheries Dynamics and Management in Marine Ecosystems publication trend

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

Technical terms

Ecosystem-based management: An approach that considers ecological relationships, habitat connectivity and human impacts to sustain marine resources.

Trophic level: The position of an organism in a food web, defined by the number of energy transfer steps from primary producers.

Upwelling: The process by which deep, nutrient-rich waters are brought to the surface, enhancing primary productivity.

Biomass: The total mass of living organisms in a given area or ecosystem at a given time.

Stock assessment: A scientific evaluation of fish population size, structure and exploitation rates to inform management decisions.

References

1. Climate change impacts on small pelagic fish distribution in Northwest Africa: trends, shifts, and risk for food security. Scientific Reports (2024).
2. Analysis of Fish Consumption in the ECOWAS Region and Mauritania: Current Constraints and Future Challenges. Sustainability (2024).
3. The History of the Brazilian Sardine (Sardinella brasiliensis) Between Two Fishery Collapses: An Ecosystem Modeling Approach to Study Its Life Cycle. Biology (2024).