A bloom of Azadinium polongum in coastal waters off Peru

Species of the dinophycean genus Azadinium are known for their potential production of azaspiracids (AZAs), a group of microalgal toxins that can cause shellfish poisoning. Increase of global Azadinium records indicates a rather wide distribution, but quantitative abundance data of species of Amphid...

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Autores principales:	Tillmann,Urban, Sánchez-Ramírez,Sonia, Krock,Bernd, Bernales-Jiménez,Avy
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2017
Materias:	Algal bloom Azadinium Peru
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572017000300015
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spelling	oai:scielo:S0718-195720170003000152018-02-22A bloom of Azadinium polongum in coastal waters off PeruTillmann,UrbanSánchez-Ramírez,SoniaKrock,BerndBernales-Jiménez,Avy Algal bloom Azadinium Peru Species of the dinophycean genus Azadinium are known for their potential production of azaspiracids (AZAs), a group of microalgal toxins that can cause shellfish poisoning. Increase of global Azadinium records indicates a rather wide distribution, but quantitative abundance data of species of Amphidomataceae are hardly available. Within the Peruvian bio-oceanographic monitoring program we detected and sampled a dense bloom of Azadinium in Peruvian coastal waters off Chancay in February 2014 at a water temperature of about 20.5 °C and a salinity of 35. With water discoloration and cell densities of Azadinium up to 1 million cells per liter this is the first Azadinium bloom record for the Pacific. The causative taxon was determined using scanning electron microscopy as Azadinium polongum, a species previously recorded only from the type locality, the Shetland Islands (north Atlantic) and described as non-AZA producer. The field population conformed to the Shetland type culture in most morphological aspects. However, the first intercalary plate of the Pacific field population without exception was not in contact with the first precingular plate, which is different to the type culture of Az. polongum. Moreover, the size and shape of the median intercalary plate was slightly different and very variable in the Pacific population, and occurred in about equal abundance in quadra- (i.e., in contact with four other plates) or in penta-configuration (i.e., in contact with five other plates), a feature not reported for the type culture of Az. polongum. Liquid chromatography coupled with mass spectrometry revealed no AZA above detection level in the bloom sample, indicating that the Peruvian Az. polongum can be regarded as a non-AZA producer.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.52 n.3 20172017-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572017000300015en10.4067/S0718-19572017000300015
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Algal bloom Azadinium Peru
spellingShingle	Algal bloom Azadinium Peru Tillmann,Urban Sánchez-Ramírez,Sonia Krock,Bernd Bernales-Jiménez,Avy A bloom of Azadinium polongum in coastal waters off Peru
description	Species of the dinophycean genus Azadinium are known for their potential production of azaspiracids (AZAs), a group of microalgal toxins that can cause shellfish poisoning. Increase of global Azadinium records indicates a rather wide distribution, but quantitative abundance data of species of Amphidomataceae are hardly available. Within the Peruvian bio-oceanographic monitoring program we detected and sampled a dense bloom of Azadinium in Peruvian coastal waters off Chancay in February 2014 at a water temperature of about 20.5 °C and a salinity of 35. With water discoloration and cell densities of Azadinium up to 1 million cells per liter this is the first Azadinium bloom record for the Pacific. The causative taxon was determined using scanning electron microscopy as Azadinium polongum, a species previously recorded only from the type locality, the Shetland Islands (north Atlantic) and described as non-AZA producer. The field population conformed to the Shetland type culture in most morphological aspects. However, the first intercalary plate of the Pacific field population without exception was not in contact with the first precingular plate, which is different to the type culture of Az. polongum. Moreover, the size and shape of the median intercalary plate was slightly different and very variable in the Pacific population, and occurred in about equal abundance in quadra- (i.e., in contact with four other plates) or in penta-configuration (i.e., in contact with five other plates), a feature not reported for the type culture of Az. polongum. Liquid chromatography coupled with mass spectrometry revealed no AZA above detection level in the bloom sample, indicating that the Peruvian Az. polongum can be regarded as a non-AZA producer.
author	Tillmann,Urban Sánchez-Ramírez,Sonia Krock,Bernd Bernales-Jiménez,Avy
author_facet	Tillmann,Urban Sánchez-Ramírez,Sonia Krock,Bernd Bernales-Jiménez,Avy
author_sort	Tillmann,Urban
title	A bloom of Azadinium polongum in coastal waters off Peru
title_short	A bloom of Azadinium polongum in coastal waters off Peru
title_full	A bloom of Azadinium polongum in coastal waters off Peru
title_fullStr	A bloom of Azadinium polongum in coastal waters off Peru
title_full_unstemmed	A bloom of Azadinium polongum in coastal waters off Peru
title_sort	bloom of azadinium polongum in coastal waters off peru
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572017000300015
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_version_	1714202374884556800

A bloom of Azadinium polongum in coastal waters off Peru

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