Removal of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales) by Mnemiopsis leidyi (Ctenophora, Lobata) in controlled experimental conditions

The objective of the present study is to estimate the removal capability of the ctenophore Mnemiopsis leidyi (Ctenophora, Lobata) on cultures of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales). For this purpose, observations on its clearance and survival rates were made in...

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Autores principales:	Bolasina,Sergio, Benavides,Hugo, Montoya,Nora, Carreto,José, Acha,Marcelo, Mianzan,Hermes
Lenguaje:	English
Publicado:	Universidad de Valparaíso. Facultad de Ciencias del Mar 2015
Materias:	Removal capability Mnemiopsis leidyi Alexandrium tamarense
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572015000300012
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spelling	oai:scielo:S0718-195720150003000122015-10-19Removal of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales) by Mnemiopsis leidyi (Ctenophora, Lobata) in controlled experimental conditionsBolasina,SergioBenavides,HugoMontoya,NoraCarreto,JoséAcha,MarceloMianzan,Hermes Removal capability Mnemiopsis leidyi Alexandrium tamarense The objective of the present study is to estimate the removal capability of the ctenophore Mnemiopsis leidyi (Ctenophora, Lobata) on cultures of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales). For this purpose, observations on its clearance and survival rates were made in controlled experiments, using different A. tamarense cell concentrations. Mnemiopsis leidyi is able to remove dinoflagellates actively from the water column only at the lowest density tested (150 cells mL-1). Animals exposed to 300 cells mL-1 presented negative clearance and removal rates (survival= 67%). All ctenophores exposed at the highest concentrations of toxic dinoflagellates (600 cells mL-1) died after 4 h. Removal may occur mainly by incorporating and entangling cells in the mucus strands formed by the ctenophore, and in a lesser way by ingestion. Results indicate that higher concentrations of A. tamarense are fatally toxic to M. leidyi and that this ctenophore could control only the initial development of this dinoflagellate bloom.info:eu-repo/semantics/openAccessUniversidad de Valparaíso. Facultad de Ciencias del MarRevista de biología marina y oceanografía v.50 n.2 20152015-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572015000300012en10.4067/S0718-19572015000300012
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Removal capability Mnemiopsis leidyi Alexandrium tamarense
spellingShingle	Removal capability Mnemiopsis leidyi Alexandrium tamarense Bolasina,Sergio Benavides,Hugo Montoya,Nora Carreto,José Acha,Marcelo Mianzan,Hermes Removal of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales) by Mnemiopsis leidyi (Ctenophora, Lobata) in controlled experimental conditions
description	The objective of the present study is to estimate the removal capability of the ctenophore Mnemiopsis leidyi (Ctenophora, Lobata) on cultures of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales). For this purpose, observations on its clearance and survival rates were made in controlled experiments, using different A. tamarense cell concentrations. Mnemiopsis leidyi is able to remove dinoflagellates actively from the water column only at the lowest density tested (150 cells mL-1). Animals exposed to 300 cells mL-1 presented negative clearance and removal rates (survival= 67%). All ctenophores exposed at the highest concentrations of toxic dinoflagellates (600 cells mL-1) died after 4 h. Removal may occur mainly by incorporating and entangling cells in the mucus strands formed by the ctenophore, and in a lesser way by ingestion. Results indicate that higher concentrations of A. tamarense are fatally toxic to M. leidyi and that this ctenophore could control only the initial development of this dinoflagellate bloom.
author	Bolasina,Sergio Benavides,Hugo Montoya,Nora Carreto,José Acha,Marcelo Mianzan,Hermes
author_facet	Bolasina,Sergio Benavides,Hugo Montoya,Nora Carreto,José Acha,Marcelo Mianzan,Hermes
author_sort	Bolasina,Sergio
title	Removal of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales) by Mnemiopsis leidyi (Ctenophora, Lobata) in controlled experimental conditions
title_short	Removal of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales) by Mnemiopsis leidyi (Ctenophora, Lobata) in controlled experimental conditions
title_full	Removal of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales) by Mnemiopsis leidyi (Ctenophora, Lobata) in controlled experimental conditions
title_fullStr	Removal of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales) by Mnemiopsis leidyi (Ctenophora, Lobata) in controlled experimental conditions
title_full_unstemmed	Removal of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales) by Mnemiopsis leidyi (Ctenophora, Lobata) in controlled experimental conditions
title_sort	removal of the toxic dinoflagellate alexandrium tamarense (dinophyta, gonyaulacales) by mnemiopsis leidyi (ctenophora, lobata) in controlled experimental conditions
publisher	Universidad de Valparaíso. Facultad de Ciencias del Mar
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-19572015000300012
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Removal of the toxic dinoflagellate Alexandrium tamarense (Dinophyta, Gonyaulacales) by Mnemiopsis leidyi (Ctenophora, Lobata) in controlled experimental conditions

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