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All aboard! A biological survey of ballast water onboard vessels spanning the North Atlantic Ocean.
Mar Pollut Bull
October 2014
Department of Oceanography, Texas A&M University, 3146 TAMU, College Station, TX 77843, United States; Department of Marine Biology, Texas A&M University at Galveston, 200 Seawolf Parkway, Galveston, TX 77553, United States.
Global movement of nonindigenous species, within ballast water tanks across natural barriers, threatens coastal and estuarine ecosystem biodiversity. In 2012, the Port of Houston ranked 10th largest in the world and 2nd in the US (waterborne tonnage). Ballast water was collected from 13 vessels to genetically examine the eukaryotic microorganism diversity being discharged into the Port of Houston, Texas (USA).
View Article and Find Full Text PDFAxenic culture of the heterotrophic dinoflagellate Pfiesteria shumwayae in a semi-defined medium.
J Eukaryot Microbiol
May 2009
Department of Plant Biology, Center for Applied Aquatic Ecology, North Carolina State University, Raleigh, North Carolina 27606, USA.
A semi-defined, biphasic culture medium was developed that supported the axenic growth of three strains of the heterotrophic dinoflagellate Pfiesteria shumwayae. Maximum cell yields and division rates in the semi-defined medium ranged from 0.1 x 10(5) to 4.
View Article and Find Full Text PDFAXENIC CULTIVATION OF THE HETEROTROPHIC DINOFLAGELLATE PFIESTERIA SHUMWAYAE AND OBSERVATIONS ON FEEDING BEHAVIOR(1).
J Phycol
December 2008
Center for Applied Aquatic Ecology, North Carolina State University, Raleigh, North Carolina 27606, USADepartment of Biology, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, USA.
Pfiesteria shumwayae Glasgow et J. M. Burkh.
View Article and Find Full Text PDFDigital holographic microscopy reveals prey-induced changes in swimming behavior of predatory dinoflagellates.
Proc Natl Acad Sci U S A
October 2007
Department of Mechanical Engineering, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USA.
The shallow depth of field of conventional microscopy hampers analyses of 3D swimming behavior of fast dinoflagellates, whose motility influences macroassemblages of these cells into often-observed dense "blooms." The present analysis of cinematic digital holographic microscopy data enables simultaneous tracking and characterization of swimming of thousands of cells within dense suspensions. We focus on Karlodinium veneficum and Pfiesteria piscicida, mixotrophic and heterotrophic dinoflagellates, respectively, and their preys.
View Article and Find Full Text PDFLack of evidence for contact sensitization by Pfiesteria extract.
Environ Health Perspect
July 2007
Toxicology Operations Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina 27709, USA.
Background: Members of the estuarine dinoflagellate genus Pfiesteria are reported to have been responsible for massive fish kills in the southeastern United States. Some reports suggest that exposure to waters having Pfiesteria blooms or occupation-related exposure might result in Pfiesteria-induced dermal irritation and inflammation. Although the toxin has not been isolated and purified, the original data suggested both hydrophilic and hydrophobic toxic components.
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