Ecological Dynamics of Atlantic Blue Crabs

The Atlantic blue crab Callinectes sapidus exhibits complex ecological dynamics driven by its native productivity, invasive potential and diverse habitat requirements. In its native western Atlantic range, this species occupies estuarine and coastal environments, serving as both predator and prey and playing a pivotal role in benthic–pelagic coupling. Its life cycle includes planktonic larval stages, juvenile nursery habitats such as seagrass beds and salt‐marsh edges, and adult migrations for spawning. Environmental factors such as temperature, salinity and habitat complexity influence larval survival and juvenile growth, with feedbacks on population dynamics and fisheries yields. Outside its native range, notably in the Mediterranean and European Atlantic, the species has established invasive populations, altering prey communities, outcompeting native crustaceans and modifying trophic interactions. Ongoing range shifts northward in response to warming temperatures further underscore its ecological plasticity. The global expansion of blue crabs has prompted investigations into ecosystem impacts, population monitoring and management strategies, balancing biodiversity conservation with economic utilisation including fisheries and valorisation pathways.

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Ecological Dynamics of Atlantic Blue Crabs publication trend

The graph below shows the total number of articles in ecological dynamics of atlantic blue crabs across all publications each year (not limited to Nature Index journals).

Technical terms

Invasive species: A non-native organism that establishes, spreads and negatively affects native biodiversity, ecosystem services or human activities.

Keystone species: A species that has a disproportionately large effect on ecological community structure relative to its abundance.

Larval recruitment: The process by which planktonic larvae settle, survive and enter juvenile populations, influencing future population size.

Microplastics: Plastic fragments or fibres smaller than 5 mm that can be ingested by aquatic organisms, with potential impacts on health and trophic transfer.

References

1. Impacts of the invasive blue crab Callinectes sapidus on small-scale fisheries in a Mediterranean lagoon using fishery landing data. The Science of The Total Environment (2025).
2. Ingestion of microplastics and microfibers by the invasive blue crab Callinectes sapidus (Rathbun 1896) in the Balearic Islands, Spain. Environmental Science and Pollution Research (2023).
3. Valorization of the Invasive Blue Crabs (Callinectes sapidus) in the Mediterranean: Nutritional Value, Bioactive Compounds and Sustainable By-Products Utilization. Marine Drugs (2024).
4. Severe, rapid and widespread impacts of an Atlantic blue crab invasion. Marine Pollution Bulletin (2022).
5. Estimating and Applying Fish and Invertebrate Density and Production Enhancement from Seagrass, Salt Marsh Edge, and Oyster Reef Nursery Habitats in the Gulf of Mexico. Estuaries and Coasts (2021).
6. Blue Bounty: Italy’s Dual-Use Solution for Crab Invasion, Nutritional Value, Safety, and Valorization. Toxics (2024).