Fisheries Management of Nephrops norvegicus Populations

The Norway lobster, Nephrops norvegicus, underpins a commercially vital fishery across the North East Atlantic and Mediterranean Sea. Its burrowing lifestyle complicates stock surveys and trawl catches, as individuals are invisible when inside their muddy galleries. Current management aims to balance exploitation with conservation by integrating trawl-based assessments, underwater video counts and habitat mapping. Regulatory frameworks such as the European Union’s Common Fisheries Policy set total allowable catches and technical measures, including mesh-size controls and fishing-effort limits. Spatial measures—marine protected areas and no-take zones—seek to safeguard critical habitats and allow population recovery. Advances in remote sensing, robotic platforms and ecological modelling are improving our understanding of distribution, demographic structure and environmental drivers. A holistic approach now links behaviour, trophic ecology and hydrodynamic influences to refine catchability estimates, optimise survey timing and design adaptive harvest strategies for sustainable yield and ecosystem resilience.

Research from Nature Portfolio

Recent studies have revealed that standard underwater video surveys may systematically underestimate Norway lobster abundance. Analysis of thousands of video transects showed an average ratio of one visible individual per ten burrow openings, challenging the assumption of one animal per burrow system. This work highlights the need to recalibrate survey models and explore autonomous monitoring solutions to capture true occupancy rates. Complementary isotopic analyses have demonstrated that suspended particulate organic matter comprises nearly half of the diet in both sexes, with consistent trophic position estimates around 2.9. These findings underscore the importance of benthic food-web interactions and energy budgets for burrow-dwelling lobsters, informing stock assessment parameters and feeding-related vulnerability to environmental change.

Fisheries Management of Nephrops norvegicus Populations publication trend

The graph below shows the total number of articles in fisheries management of nephrops norvegicus populations across all publications each year (not limited to Nature Index journals).

Technical terms

Burrow emergence: Behavioural event when Nephrops leaves its burrow to forage or perform door-keeping, affecting visibility in surveys.

UWTV survey: Underwater Television method for stock estimation that counts visible individuals or burrow openings along seabed transects.

No-take reserve: Marine area where all extraction is prohibited, allowing stock and habitat recovery free from fishing pressure.

CPUE (Catch Per Unit Effort): Standardised index of catch weight or numbers per unit of fishing effort, employed as a proxy for relative abundance.

References

1. ROV-based monitoring of passive ecological recovery in a deep-sea no-take fishery reserve. The Science of The Total Environment (2023).
2. Burrow emergence rhythms of deep-water Mediterranean Norway lobsters (Nephrops norvegicus) revealed by acoustic telemetry. Reviews in Fish Biology and Fisheries (2023).
3. Established and Emerging Research Trends in Norway Lobster, Nephrops norvegicus. Biology (2023).
4. The Saga of the Management of Fisheries in the Adriatic Sea: History, Flaws, Difficulties, and Successes toward the Application of the Common Fisheries Policy in the Mediterranean. Frontiers in Marine Science (2017).
5. Burrow emergence rhythms of Nephrops norvegicus by UWTV and surveying biases. Scientific Reports (2021).
6. Advancing fishery-independent stock assessments for the Norway lobster (Nephrops norvegicus) with new monitoring technologies. Frontiers in Marine Science (2022).
7. Importance of suspended particulate organic matter in the diet of Nephrops norvegicus (Linnaeus, 1758). Scientific Reports (2020).