Comparison of a Chilean strain of the ichthyotoxic phytoflagellate Heterosigma akashiwo (Raphidophyceae) with strains from France, Spain and New Zealand

Primer Autor
Gomez, Patricia, I,
Co-autores
Inostroza, Ingrid
Castro-Varela, Pablo
Silva, Jeannette
Clement, Alejandro
Rojas, Gabriel
Aguilera Belmonte, Alejandra
Título
Comparison of a Chilean strain of the ichthyotoxic phytoflagellate Heterosigma akashiwo (Raphidophyceae) with strains from France, Spain and New Zealand
Editorial
TAYLOR & FRANCIS LTD
Revista
PHYCOLOGIA
Lenguaje
en
Resumen
Heterosigma akashiwo is a bloom-forming planktonic flagellate that causes fish mortalities, which damages the aquaculture industry worldwide. In Chile, this species was reported for the first time in 1988 when it caused one of the most dramatic harmful algal blooms in the south of the country. At that time, an unialgal culture was set and used for a morphological characterization but, unfortunately, it was not maintained. In April 2013 a new outbreak of H. akashiwo was detected in the Maullin Estuary (41 degrees 37 ' S, 73 degrees 36 ' W), Southern Chile, causing fish mortalities in commercial salmon farms. An unialgal culture of this new Chilean population of H. akashiwo was obtained and has been maintained in the Culture Collection of Microalgae of the University of Concepcion, Chile, under the code CCM-UdeC 225. The aim of this study was to compare the morphological and physiological attributes of this Chilean strain of H. akashiwo with those of strains from France, Spain and New Zealand, in order to identify eventual intraspecific variability among them. Cell size, growth parameters, pigments profiles, photosynthetic attributes and toxicity were determined for the strains, grown under identical culture conditions. The Chilean strain exhibited the highest growth and accumulated the highest proportion of the carotenoid fucoxanthin, while strains from Chile and Spain were the less light-tolerant and had similar toxicity. These results reinforce previous findings about the high level of intraspecific variability within H. akashiwo including, for the first time, a strain from South America.
Tipo de Recurso
artículo original
Description
This work was supported by the COPAS-Sur Austral Program [CONICYT Grant PFB-31]; Universidad de Concepcion, Chile and Consortium Algaefuels [09CTEI6861-04].
Este trabajo fue apoyado por el Programa COPAS-Sur Austral [Beca CONICYT PFB-31]; Universidad de Concepción, Chile y Consorcio Algaefuels [09CTEI6861-04].
doi
10.1080/00318884.2021.1991685
Formato Recurso
PDF
Palabras Claves
Fish-killing microalgae
Intraspecific variability
South American strain
FLAGELLATE HETEROSIGMA
RAPID IDENTIFICATION
CHATTONELLA-MARINA
PAM FLUOROMETRY
TOXICITY
SALMON
BLOOM
BAY
PHYTOPLANKTON
NUCLEAR
Ubicación del archivo
http://dx.doi.org/10.1080/00318884.2021.1991685
Categoría OCDE
Ciencias Vegetales
Biología marina y de agua dulce
Materias
Microalgas que matan peces
Variabilidad intraespecífica
Cepa sudamericana
FLAGELADOS HETEROSIGMA
IDENTIFICACIÓN RÁPIDA
CHATTONELLA-MARINA
FLUOROMETRÍA PAM
TOXICIDAD
SALMÓN
BLOOM
BAHÍA
FITOPLANCTON
NUCLEAR
Disciplinas de la OCDE
Biología Marina y Limnología
Pesca
Ecología
Versión del recurso (Recomendado-único)
version publicada
Tipo de ruta
suscripción
Access Rights
metadata
Derechos de acceso
metadata
Id de Web of Science
WOS:000718229700001
Título de la cita (Recomendado-único)
Comparison of a Chilean strain of the ichthyotoxic phytoflagellate Heterosigma akashiwo (Raphidophyceae) with strains from France, Spain and New Zealand
Página de inicio (Recomendado-único)
7
Página final (Recomendado-único)
15
Identificador del recurso (Mandatado-único)
artículo original
Condición de la licencia (Recomendado-repetible)
0
Referencia del Financiador (Mandatado si es aplicable-repetible)
CONICYT PFB-31
Consortium Algaefuels 09CTEI6861-04
Colecciones
Colección Publicaciones Científicas
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