Identification and seasonal occurrence of potentially toxic Pseudo-nitzschia diatoms in oyster growing estuaries of New South Wales, Australia

Ajani, P; Murray, S; Hallegraeff, G; Brett, S; Webster, G; Armand, L

Identification and seasonal occurrence of potentially toxic Pseudo-nitzschia diatoms in oyster growing estuaries of New South Wales, Australia

Ajani, P

Murray, S

Hallegraeff, G Brett, S Webster, G Armand, L

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Publisher:: United Nations FAO
Publication Type:: Conference Proceeding
Citation:: Proc. 9th Int. Conf. Molluscan Shellfish Safety, 2014, pp. 100 - 103
Issue Date:: 2014-01-01

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Field	Value	Language
dc.contributor.author	Ajani, P https://orcid.org/0000-0001-5364-9936	en_US
dc.contributor.author	Murray, S https://orcid.org/0000-0001-7096-1307	en_US
dc.contributor.author	Hallegraeff, G	en_US
dc.contributor.author	Brett, S	en_US
dc.contributor.author	Webster, G	en_US
dc.contributor.author	Armand, L	en_US
dc.date	2013-03-17	en_US
dc.date.issued	2014-01-01	en_US
dc.identifier.citation	Proc. 9th Int. Conf. Molluscan Shellfish Safety, 2014, pp. 100 - 103	en_US
dc.identifier.isbn	978-0-646-92993-4	en_US
dc.identifier.uri	http://hdl.handle.net/10453/33574
dc.description.abstract	Abstract: Species belonging to the potentially toxic diatom genus Pseudo-nitzschia are a significant component of the phytoplankton community in south-east Australian waters. Toxigenic representatives of this genus produce domoic acid and are responsible for the majority of regulatory exceedances in New South Wales (NSW) oyster-growing estuaries. This toxic genus has been implicated in 6 toxic events during the sampling period 2005-2009 (max. concentration of 34 mg DA kg-1 oyster tissue). However, identification to species level is difficult and requires both electron microscopy and molecular techniques for unambiguous identification. Detailed analyses revealed 10 different species in NSW coastal waters, Pseudo-nitzschia americana, P. arenysensis, P. calliantha, P. cuspidata, P. fraudulenta, P. hasleana, P. micropora, P. multiseries, P. multistriata and P. pungens, including two confirmed domoic acid producers, P. cuspidata (25.4 pg DA cell-1) and P. multistriata (11 pg DA cell-1). Species diversity and the seasonal occurrence of regulatory Pseudo-nitzschia groupings have important implications for monitoring and management of shellfish harvest areas in NSW. The ubiquitous species, Pseudo-nitzschia cuspidata, represents the greatest challenge for coastal shellfish culture in NSW	en_US
dc.publisher	United Nations FAO	en_US
dc.relation.ispartof	Proc. 9th Int. Conf. Molluscan Shellfish Safety	en_US
dc.relation.ispartof	International Conference of Molluscan Shellfish Safety	en_US
dc.title	Identification and seasonal occurrence of potentially toxic Pseudo-nitzschia diatoms in oyster growing estuaries of New South Wales, Australia	en_US
dc.type	Conference Proceeding
utslib.location	online	en_US
utslib.location.activity	Sydney Australia	en_US
utslib.for	0607 Plant Biology	en_US
dc.location.activity	Sydney Australia
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - C3 - Climate Change Cluster
utslib.copyright.status	closed_access
pubs.consider-herdc	true	en_US
pubs.finish-date	2013-03-22	en_US
pubs.place-of-publication	online	en_US
pubs.publication-status	Published	en_US
pubs.start-date	2013-03-17	en_US

Abstract:

Abstract: Species belonging to the potentially toxic diatom genus Pseudo-nitzschia are a significant component of the phytoplankton community in south-east Australian waters. Toxigenic representatives of this genus produce domoic acid and are responsible for the majority of regulatory exceedances in New South Wales (NSW) oyster-growing estuaries. This toxic genus has been implicated in 6 toxic events during the sampling period 2005-2009 (max. concentration of 34 mg DA kg-1 oyster tissue). However, identification to species level is difficult and requires both electron microscopy and molecular techniques for unambiguous identification. Detailed analyses revealed 10 different species in NSW coastal waters, Pseudo-nitzschia americana, P. arenysensis, P. calliantha, P. cuspidata, P. fraudulenta, P. hasleana, P. micropora, P. multiseries, P. multistriata and P. pungens, including two confirmed domoic acid producers, P. cuspidata (25.4 pg DA cell-1) and P. multistriata (11 pg DA cell-1). Species diversity and the seasonal occurrence of regulatory Pseudo-nitzschia groupings have important implications for monitoring and management of shellfish harvest areas in NSW. The ubiquitous species, Pseudo-nitzschia cuspidata, represents the greatest challenge for coastal shellfish culture in NSW

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http://hdl.handle.net/10453/33574