Marine Science News

Phycoerythrin fluorescence monitoring in the Baltic Sea using CTG UniLux Fluorometers

Phycoerythrin is among the most dynamic phytoplankton pigments in the Baltic Sea. While Chlorophyll a provides information on bulk phytoplankton biomass and phycocyanin reflects the distribution of filamentous cyanobactreria, phycoerythrin signal originates mainly from picocyanobacteria, ciliate Mesodinium rubrum, cryptophytes and some dinoflagellates.

FastOcean used world-wide to monitor gross and net primary productivity (GPP and NPP)

Over the last year, Chelsea Technologies Group (CTG) has seen a number of publications appear regarding the use of the FastOcean Fast Repetition Rate fluorometer (FRRf) in the field. The FRRf is a great tool for measuring primary productivity and assessing the health of phytoplankton communities. The published papers (see below) demonstrate a wide range of uses for the instrument. These include investigating phytoplankton physiology in the Southern Ocean with regard to iron availability, comparing the effect of ocean acidification and irradiance on photophysiology in different phytoplankton groups and investigating the effect of silver nanoparticle toxicity in diatoms.

Leaders in environmental consulting @PLANCTON_ANDINO (Chile) have been using a @Chelsea_CTG  Act2 #frrf3 to monitor red tides as part of the Bivalve Molluscs Health Program.

Leading environmental consultants Plancton Andino SpA (Chile) are using a CTG FastAct Laboratory FRRf System to monitor red tides as part of the Bivalve Molluscs Health Program.

Chile is the world’s fourth largest producer of mussels and the health of the mussels is of paramount importance to the economy. These “red tides” or Harmful algal blooms (HABs) are natural events occurring around the world. Since first being reported in Chile in 1972 in the Strait of Magellan these HAB have increased in both frequency and geographic coverage.


Leading subsea technology developer Sonardyne International Ltd. has acquired maritime and marine science technology specialist Chelsea Technologies Group Ltd. The acquisition is part of a long-term growth strategy for Sonardyne, to diversify into markets where it sees an opportunity to build on its core technology base and expertise in underwater acoustic and optical communications, navigation and autonomous monitoring systems. In acquiring Chelsea (also known as CTG), Sonardyne will both strengthen its presence in the maritime, marine and ocean science sectors and create new opportunities in the water environmental, defence and process control markets. Chelsea will gain access to Sonardyne’s considerable research, production, testing, compliance and global distribution capabilities, allowing the company to access many more international territories.

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