Modelling paralytic shellfish toxins (PST) accumulation in Crassostrea gigas by using Dynamic Energy Budgets (DEB)
As other filter-feeders, Crassostrea gigas can concentrate paralytic shellfish toxins (PST) by consuming dinoflagellate phytoplankton species like Alexandrium minutum. Intake of PST in oyster tissues mainly results from feeding processes, i.e. clearance rate, pre-ingestive sorting and ingestion that...
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Online Access: | https://doi.org/10.1016/j.seares.2018.09.002 https://archimer.ifremer.fr/doc/00455/56662/58407.pdf https://archimer.ifremer.fr/doc/00455/56662/ |
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fttriple:oai:gotriple.eu:10670/1.2b54g9 2023-05-15T15:58:26+02:00 Modelling paralytic shellfish toxins (PST) accumulation in Crassostrea gigas by using Dynamic Energy Budgets (DEB) Pousse, Emilien Flye-sainte-marie, Jonathan Alunno-bruscia, Marianne Hegaret, Helene Rannou, Eric Pecquerie, Laure Marques, Goncalo M. Thomas, Yoann Castrec, Justine Fabioux, Caroline Long, Marc Lassudrie, Malwenn Hermabessiere, Ludovic Amzil, Zouher Soudant, Philippe Jean, Fred https://doi.org/10.1016/j.seares.2018.09.002 https://archimer.ifremer.fr/doc/00455/56662/58407.pdf https://archimer.ifremer.fr/doc/00455/56662/ en eng Elsevier Science Bv doi:10.1016/j.seares.2018.09.002 10670/1.2b54g9 https://archimer.ifremer.fr/doc/00455/56662/58407.pdf https://archimer.ifremer.fr/doc/00455/56662/ Archimer, archive institutionnelle de l'Ifremer Journal Of Sea Research (1385-1101) (Elsevier Science Bv), 2019-01 , Vol. 143 , P. 152-164 envir geo Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1016/j.seares.2018.09.002 2023-01-22T17:02:49Z As other filter-feeders, Crassostrea gigas can concentrate paralytic shellfish toxins (PST) by consuming dinoflagellate phytoplankton species like Alexandrium minutum. Intake of PST in oyster tissues mainly results from feeding processes, i.e. clearance rate, pre-ingestive sorting and ingestion that are directly influenced by environmental conditions (trophic sources, temperature). This study aimed to develop a mechanistic model coupling the kinetics of PST accumulation and bioenergetics in C. gigas based on Dynamic Energy Budget (DEB) theory. For the first time, the Synthesizing Units (SU) concept was applied to formalize the feeding preference of oysters between non-toxic and toxic microalgae. Toxin intake and accumulation were both dependent on the physiological status of oysters. The accumulation was modelled through the dynamics of two toxin compartments: (1) a compartment of ingested but non-assimilated toxins, with labile toxins within the digestive gland eliminated via faeces production; (2) a compartment of assimilated toxins with a rapid detoxification rate (within a few days). Firstly, the DEB-PST model was calibrated using data from two laboratory experiments where oysters have been exposed to A. minutum. Secondly, it was validated using data from another laboratory experiment and from three field surveys carried out in the Bay of Brest (France) from 2012 to 2014. To account for the variability in PST content of A. minutum cells, the saxitoxin (STX) amount per energy units in a toxic algae (ρPST) was adjusted for each dataset. Additionally, the effects of PST on the oyster bioenergetics were calibrated during the first laboratory experiment. However, these effects were shown to depend on the strain of A. minutum. Results of this study could be of great importance for monitoring agencies and decision makers to identify risky conditions (e.g. production areas, seawater temperature), to properly assess detoxification step (e.g. duration, modalities) before any commercialization or to improve predictions ... Text Crassostrea gigas Unknown Journal of Sea Research 143 152 164 |
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fttriple |
language |
English |
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envir geo |
spellingShingle |
envir geo Pousse, Emilien Flye-sainte-marie, Jonathan Alunno-bruscia, Marianne Hegaret, Helene Rannou, Eric Pecquerie, Laure Marques, Goncalo M. Thomas, Yoann Castrec, Justine Fabioux, Caroline Long, Marc Lassudrie, Malwenn Hermabessiere, Ludovic Amzil, Zouher Soudant, Philippe Jean, Fred Modelling paralytic shellfish toxins (PST) accumulation in Crassostrea gigas by using Dynamic Energy Budgets (DEB) |
topic_facet |
envir geo |
description |
As other filter-feeders, Crassostrea gigas can concentrate paralytic shellfish toxins (PST) by consuming dinoflagellate phytoplankton species like Alexandrium minutum. Intake of PST in oyster tissues mainly results from feeding processes, i.e. clearance rate, pre-ingestive sorting and ingestion that are directly influenced by environmental conditions (trophic sources, temperature). This study aimed to develop a mechanistic model coupling the kinetics of PST accumulation and bioenergetics in C. gigas based on Dynamic Energy Budget (DEB) theory. For the first time, the Synthesizing Units (SU) concept was applied to formalize the feeding preference of oysters between non-toxic and toxic microalgae. Toxin intake and accumulation were both dependent on the physiological status of oysters. The accumulation was modelled through the dynamics of two toxin compartments: (1) a compartment of ingested but non-assimilated toxins, with labile toxins within the digestive gland eliminated via faeces production; (2) a compartment of assimilated toxins with a rapid detoxification rate (within a few days). Firstly, the DEB-PST model was calibrated using data from two laboratory experiments where oysters have been exposed to A. minutum. Secondly, it was validated using data from another laboratory experiment and from three field surveys carried out in the Bay of Brest (France) from 2012 to 2014. To account for the variability in PST content of A. minutum cells, the saxitoxin (STX) amount per energy units in a toxic algae (ρPST) was adjusted for each dataset. Additionally, the effects of PST on the oyster bioenergetics were calibrated during the first laboratory experiment. However, these effects were shown to depend on the strain of A. minutum. Results of this study could be of great importance for monitoring agencies and decision makers to identify risky conditions (e.g. production areas, seawater temperature), to properly assess detoxification step (e.g. duration, modalities) before any commercialization or to improve predictions ... |
format |
Text |
author |
Pousse, Emilien Flye-sainte-marie, Jonathan Alunno-bruscia, Marianne Hegaret, Helene Rannou, Eric Pecquerie, Laure Marques, Goncalo M. Thomas, Yoann Castrec, Justine Fabioux, Caroline Long, Marc Lassudrie, Malwenn Hermabessiere, Ludovic Amzil, Zouher Soudant, Philippe Jean, Fred |
author_facet |
Pousse, Emilien Flye-sainte-marie, Jonathan Alunno-bruscia, Marianne Hegaret, Helene Rannou, Eric Pecquerie, Laure Marques, Goncalo M. Thomas, Yoann Castrec, Justine Fabioux, Caroline Long, Marc Lassudrie, Malwenn Hermabessiere, Ludovic Amzil, Zouher Soudant, Philippe Jean, Fred |
author_sort |
Pousse, Emilien |
title |
Modelling paralytic shellfish toxins (PST) accumulation in Crassostrea gigas by using Dynamic Energy Budgets (DEB) |
title_short |
Modelling paralytic shellfish toxins (PST) accumulation in Crassostrea gigas by using Dynamic Energy Budgets (DEB) |
title_full |
Modelling paralytic shellfish toxins (PST) accumulation in Crassostrea gigas by using Dynamic Energy Budgets (DEB) |
title_fullStr |
Modelling paralytic shellfish toxins (PST) accumulation in Crassostrea gigas by using Dynamic Energy Budgets (DEB) |
title_full_unstemmed |
Modelling paralytic shellfish toxins (PST) accumulation in Crassostrea gigas by using Dynamic Energy Budgets (DEB) |
title_sort |
modelling paralytic shellfish toxins (pst) accumulation in crassostrea gigas by using dynamic energy budgets (deb) |
publisher |
Elsevier Science Bv |
url |
https://doi.org/10.1016/j.seares.2018.09.002 https://archimer.ifremer.fr/doc/00455/56662/58407.pdf https://archimer.ifremer.fr/doc/00455/56662/ |
genre |
Crassostrea gigas |
genre_facet |
Crassostrea gigas |
op_source |
Archimer, archive institutionnelle de l'Ifremer Journal Of Sea Research (1385-1101) (Elsevier Science Bv), 2019-01 , Vol. 143 , P. 152-164 |
op_relation |
doi:10.1016/j.seares.2018.09.002 10670/1.2b54g9 https://archimer.ifremer.fr/doc/00455/56662/58407.pdf https://archimer.ifremer.fr/doc/00455/56662/ |
op_doi |
https://doi.org/10.1016/j.seares.2018.09.002 |
container_title |
Journal of Sea Research |
container_volume |
143 |
container_start_page |
152 |
op_container_end_page |
164 |
_version_ |
1766394180792221696 |