Accumulation of diarrhetic shellfish poisoning toxins in the oyster Crassostrea gigas and the mussel Choromytilus meridionalis in the southern Benguela ecosystem
Diarrhetic shellfish poisoning (DSP) poses a significant threat to the safe consumption of shellfish in the southern Benguela ecosystem. The accumulation of DSP toxins was investigated in two cultivated bivalve species, the Pacific oyster Crassostrea gigas and the mussel Choromytilus meridionalis, s...
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African Journal of Marine Science
2011
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ftjafricanj:oai:ojs.ajol.info:article/70555 2023-05-15T15:58:02+02:00 Accumulation of diarrhetic shellfish poisoning toxins in the oyster Crassostrea gigas and the mussel Choromytilus meridionalis in the southern Benguela ecosystem GC Pitcher B Krock AD Cembella 2011-10-12 application/pdf http://ajol.info/index.php/ajms/article/view/70555 en eng African Journal of Marine Science http://ajol.info/index.php/ajms/article/view/70555 Copyright for articles published in this journal is retained by the publisher. African Journal of Marine Science; Vol 33, No 2 (2011) Peer-reviewed Article 2011 ftjafricanj 2011-10-15T23:40:25Z Diarrhetic shellfish poisoning (DSP) poses a significant threat to the safe consumption of shellfish in the southern Benguela ecosystem. The accumulation of DSP toxins was investigated in two cultivated bivalve species, the Pacific oyster Crassostrea gigas and the mussel Choromytilus meridionalis, suspended from a mooring located off Lambert’s Bay on the west coast of South Africa. The dinoflagellate Dinophysis acuminata, a known source of polyether toxins associated with DSP, was common through most of the study period. The toxin composition of the dinoflagellate was dominated by okadaic acid (OA) (91%), with lesser quantities of the dinophysistoxin DTX-1 (6.5%) and pectenotoxin PTX-2 (2.4%), and traces of PTX-2sa and PTX-11. The mean cell toxin quota ofD. acuminata was 7.8 pg OA cell–1. The toxin profile in shellfish was characterised by a notably higher relative content of DTX-1. The study showed the average concentration of DSP toxins in the mussels to exceed that in the oysters by approximately 20-fold. The results indicate a need to establish species-specific sampling frequencies in shellfish safety monitoring programmes. Keywords: Benguela Current, Dinophysis acuminata, DSP toxins, LC-MS/MS, shellfish toxicityAfrican Journal of Marine Science 2011, 33(2): 273–281 Article in Journal/Newspaper Crassostrea gigas Pacific oyster AJOL - African Journals Online Pacific |
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AJOL - African Journals Online |
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ftjafricanj |
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English |
description |
Diarrhetic shellfish poisoning (DSP) poses a significant threat to the safe consumption of shellfish in the southern Benguela ecosystem. The accumulation of DSP toxins was investigated in two cultivated bivalve species, the Pacific oyster Crassostrea gigas and the mussel Choromytilus meridionalis, suspended from a mooring located off Lambert’s Bay on the west coast of South Africa. The dinoflagellate Dinophysis acuminata, a known source of polyether toxins associated with DSP, was common through most of the study period. The toxin composition of the dinoflagellate was dominated by okadaic acid (OA) (91%), with lesser quantities of the dinophysistoxin DTX-1 (6.5%) and pectenotoxin PTX-2 (2.4%), and traces of PTX-2sa and PTX-11. The mean cell toxin quota ofD. acuminata was 7.8 pg OA cell–1. The toxin profile in shellfish was characterised by a notably higher relative content of DTX-1. The study showed the average concentration of DSP toxins in the mussels to exceed that in the oysters by approximately 20-fold. The results indicate a need to establish species-specific sampling frequencies in shellfish safety monitoring programmes. Keywords: Benguela Current, Dinophysis acuminata, DSP toxins, LC-MS/MS, shellfish toxicityAfrican Journal of Marine Science 2011, 33(2): 273–281 |
format |
Article in Journal/Newspaper |
author |
GC Pitcher B Krock AD Cembella |
spellingShingle |
GC Pitcher B Krock AD Cembella Accumulation of diarrhetic shellfish poisoning toxins in the oyster Crassostrea gigas and the mussel Choromytilus meridionalis in the southern Benguela ecosystem |
author_facet |
GC Pitcher B Krock AD Cembella |
author_sort |
GC Pitcher |
title |
Accumulation of diarrhetic shellfish poisoning toxins in the oyster Crassostrea gigas and the mussel Choromytilus meridionalis in the southern Benguela ecosystem |
title_short |
Accumulation of diarrhetic shellfish poisoning toxins in the oyster Crassostrea gigas and the mussel Choromytilus meridionalis in the southern Benguela ecosystem |
title_full |
Accumulation of diarrhetic shellfish poisoning toxins in the oyster Crassostrea gigas and the mussel Choromytilus meridionalis in the southern Benguela ecosystem |
title_fullStr |
Accumulation of diarrhetic shellfish poisoning toxins in the oyster Crassostrea gigas and the mussel Choromytilus meridionalis in the southern Benguela ecosystem |
title_full_unstemmed |
Accumulation of diarrhetic shellfish poisoning toxins in the oyster Crassostrea gigas and the mussel Choromytilus meridionalis in the southern Benguela ecosystem |
title_sort |
accumulation of diarrhetic shellfish poisoning toxins in the oyster crassostrea gigas and the mussel choromytilus meridionalis in the southern benguela ecosystem |
publisher |
African Journal of Marine Science |
publishDate |
2011 |
url |
http://ajol.info/index.php/ajms/article/view/70555 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
African Journal of Marine Science; Vol 33, No 2 (2011) |
op_relation |
http://ajol.info/index.php/ajms/article/view/70555 |
op_rights |
Copyright for articles published in this journal is retained by the publisher. |
_version_ |
1766393749954363392 |