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Toxicon. 2016 Feb;110:51-5. doi: 10.1016/j.toxicon.2015.12.003. Epub 2015 Dec 13.

Toxic Trichodesmium bloom occurrence in the southwestern South Atlantic Ocean.

Author information

1
Postgraduate Program in Biological Oceanography, Institute of Oceanography, Federal University of Rio Grande, Av. Italia, km 8, Rio Grande, RS, 96203-900, Brazil; Laboratory of Cyanobacteria and Phycotoxin, Institute of Oceanography, Federal University of Rio Grande, Av. Italia, km 8, Rio Grande, RS, 96203-900, Brazil. Electronic address: amaliadetoni@gmail.com.
2
Laboratory of Cyanobacteria and Phycotoxin, Institute of Oceanography, Federal University of Rio Grande, Av. Italia, km 8, Rio Grande, RS, 96203-900, Brazil; Postgraduate Program in Physical, Chemical and Geological Oceanography, Institute of Oceanography, Federal University of Rio Grande, Av. Italia, km 8, Rio Grande, RS, 96203-900, Brazil.
3
Laboratory of Cyanobacteria and Phycotoxin, Institute of Oceanography, Federal University of Rio Grande, Av. Italia, km 8, Rio Grande, RS, 96203-900, Brazil.

Abstract

Harmful Trichodesmium blooms have been reported on the continental slope of the southwestern South Atlantic Ocean; we sampled six such blooms. The highest saxitoxin concentration was observed where the number of colonies was proportionally greater relative to the total density of trichomes. Trichodesmium blooms are harmful to shrimp larvae and may lead to plankton community mortality. This study is the first record of neurotoxic blooms in the open waters of the South Atlantic.

KEYWORDS:

Continental slope; Oceanic bloom; Saxitoxin concentrations; South Atlantic; Trichodesmium

PMID:
26695000
DOI:
10.1016/j.toxicon.2015.12.003
[Indexed for MEDLINE]

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