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Low Oxygen Conditions Increase Parasite Infections in Oysters

A study funded in part by NCCOS has found that diel-cycling hypoxia—daily cycling of high to very low oxygen levels—in shallow coastal waters increases parasite infections in eastern oysters (Crassostrea virginica). The project team tested and confirmed that diel-cycling hypoxia increases eastern oyster susceptibility to Perkinsus marinus infection, most likely by reducing the oxygen carrying capacity […]

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Assessing Future Harmful Algal Bloom Risk for Washington State

In Puget Sound, the toxic alga Alexandrium catenella threatens the health of people who eat shellfish contaminated with toxins it produces. An NCCOS Ecology and Oceanography of Harmful Algal Blooms (ECOHAB) project, Puget Sound Alexandrium Harmful Algal Blooms, annually mapped “seedbeds” of Alexandrium resting stages (cysts) at about 100 locations on the bottom throughout Puget Sound. The project […]

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NCCOS Hosts Visiting Scientists

Collaboration to Identify Ecologically Important Areas in the Florida Keys National Marine Sanctuary NCCOS Biogeography Branch staff are working with visiting scholar Daniel Mateos-Molina, on methods to identify ecologically important areas in the Florida Keys National Marine Sanctuary. Daniel is a Marie Curie fellow in a project funded by the European Commission for Monitoring Mediterranean Marine […]

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Upwelling Controls HAB Movement toward Pacific NW Coast

Models developed by NCCOS-sponsored researchers will predict the transport of harmful algal blooms (HABs) to coastal beaches or offshore from two locations off of Washington and Oregon, based on the influence of the Columbia River Plume and seasonal upwelling (displacement of surface water by cool, nutrient rich, deep water). A recent study determined that upwelling plays […]

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New Fish Farm Siting and Management Practices Reduce Water Quality Impacts

Scientists with NOAA’s National Centers for Coastal Ocean Science (NCCOS) found that fish farm effects on dissolved oxygen and turbidity have been largely eliminated through better management, like using formulated feeds, minimizing feed waste, and properly siting farms in deep waters with flushing currents. The trend toward moving industrial-scale aquaculture into offshore waters is increasingly […]

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Measuring Parasites and Disease in U.S. Oysters and Mussels

NOAA today released its first-ever long term report of the national distribution of parasites and disease in mussels and oysters, concluding that there was no general threat to oyster and mussel population in the nation’s coastal waters at the time of the study, despite some locations along the Gulf of Mexico and West Coast with […]

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AquaSpace: An Ecosystem Approach to Making Space for Sustainable Aquaculture

NCCOS joined a recently approved project “AquaSpace – Ecosystem Approach to making Space for Sustainable Aquaculture,” as part of the European Commission research topic “Optimizing space availability for European Aquaculture.” The project aims to increase space available for aquaculture within areas of high water quality using the Ecosystem Approach to Aquaculture (EAA) and Marine Spatial Planning (MSP), which increases food security […]

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Primary Cause of Dead Zones is Biological on Pacific Northwest Continental Shelves

Coastal waters of the northern portion of the California Current System experience a seasonal decline in oxygen concentrations and increasing hypoxia (dead zones) over the summer upwelling season resulting in negative impacts to many organisms. NCCOS-sponsored research modelling determined that plankton respiration was the leading influence on seasonal and interannual fluctuations in oxygen concentration and hypoxia in the […]

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