Vertical distribution of the chloromonad flagellate Heterosigma carterae in columns: Implications for bloom development

Canadian Journal of Fisheries and Aquatic Sciences
By: , and 

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Abstract

Blooms of the marine flagellate Heterosigma carterae have been associated with catastrophic fish kills at mariculture facilities around the world. The precise cause(s) of the sudden appearance and disappearance of Heterosigma surface blooms has not been completely described or understood. Environmental data from prior studies of blooms indicate the presence of vertical stratification of the water column that is often induced by freshwater runoff. We report the relatively rapid concentration of Heterosigma cells at the surface of tubes shortly after the addition of distilled water to the surface. This phenomenon of cell concentration in surface waters may partially explain the sudden appearance of Heterosigma cells near the surface and subsequent disappearance when vertical stratification is lost due to turbulence or mixing. The results may lead to bloom mitigation techniques for net pen aquaculture.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Vertical distribution of the chloromonad flagellate Heterosigma carterae in columns: Implications for bloom development
Series title Canadian Journal of Fisheries and Aquatic Sciences
DOI 10.1139/f97-131
Volume 54
Issue 10
Year Published 1998
Language English
Publisher Canadian Science Publishing
Contributing office(s) Western Fisheries Research Center
Description 7 p.
First page 2228
Last page 2234