Sources of paralytic shellfish toxin accumulation variability in the Pacific oyster Crassostrea gigas
This study was designed to assess the contribution of feeding behavior to inter-individual variability of paralytic shellfish toxin (PST) accumulation in the Pacific oyster Crassostrea gigas. For this purpose 42 oysters were exposed for 2 days to non-toxic algae and then for 2 other days to the PST...
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fttriple:oai:gotriple.eu:10670/1.l27ipu 2023-05-15T15:58:28+02:00 Sources of paralytic shellfish toxin accumulation variability in the Pacific oyster Crassostrea gigas Pousse, Emilien Flye-sainte-marie, Jonathan Alunno-bruscia, Marianne Hegaret, Helene Jean, Fred https://doi.org/10.1016/j.toxicon.2017.12.050 https://archimer.ifremer.fr/doc/00416/52789/53688.pdf https://archimer.ifremer.fr/doc/00416/52789/ en eng Pergamon-elsevier Science Ltd doi:10.1016/j.toxicon.2017.12.050 10670/1.l27ipu https://archimer.ifremer.fr/doc/00416/52789/53688.pdf https://archimer.ifremer.fr/doc/00416/52789/ Archimer, archive institutionnelle de l'Ifremer Toxicon (0041-0101) (Pergamon-elsevier Science Ltd), 2018-03 , Vol. 144 , P. 14-22 envir psy Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1016/j.toxicon.2017.12.050 2023-01-22T17:01:44Z This study was designed to assess the contribution of feeding behavior to inter-individual variability of paralytic shellfish toxin (PST) accumulation in the Pacific oyster Crassostrea gigas. For this purpose 42 oysters were exposed for 2 days to non-toxic algae and then for 2 other days to the PST producer Alexandrium minutum. Individual clearance rate (CR) of oysters was continuously monitored over the 4 days using an ecophysiological measurement system. Comparison of CR values when exposed to toxic and non toxic algae allowed to estimate a clearance rate inhibition index (CRII). Toxin concentration of oysters was quantified at the end of the experiment. These data allowed to estimate the toxin accumulation efficiency (TAE) as the ratio of toxin accumulated on toxin consumed. Changes of clearance rate during the experiment indicated that all individuals stopped feeding immediately after being exposed to A. minutum for at least 7 h. This fast response likely corresponded to a behavioral mechanism of avoidance rather to a toxin-induced response. Individuals also showed high inter-variability in their recovery of filtration after this period. Most of the inter-individual variability (78%) in PST accumulation in C. gigas could be explained by the consumption of A. minutum cells, thus emphasizing the importance of the feeding behavior in accumulation. Based on the toxin concentration in their tissues, oysters were clustered in 3 groups showing contrasted patterns of PST accumulation: the high accumulation group was characterized by high feeding rates both on non-toxic and toxic diet and subsequently a low CRII and high TAE. Inversely, the low accumulation group was characterized by low filtration rates, high CRII and low TAE. Both filtration capacity and sensitivity of oysters to toxins may account for the differences in their accumulation. The contribution of TAE in PST accumulation is discussed and might result from differences in assimilation and detoxification abilities among individuals. Text Crassostrea gigas Pacific oyster Unknown Pacific Toxicon 144 14 22 |
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envir psy Pousse, Emilien Flye-sainte-marie, Jonathan Alunno-bruscia, Marianne Hegaret, Helene Jean, Fred Sources of paralytic shellfish toxin accumulation variability in the Pacific oyster Crassostrea gigas |
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envir psy |
description |
This study was designed to assess the contribution of feeding behavior to inter-individual variability of paralytic shellfish toxin (PST) accumulation in the Pacific oyster Crassostrea gigas. For this purpose 42 oysters were exposed for 2 days to non-toxic algae and then for 2 other days to the PST producer Alexandrium minutum. Individual clearance rate (CR) of oysters was continuously monitored over the 4 days using an ecophysiological measurement system. Comparison of CR values when exposed to toxic and non toxic algae allowed to estimate a clearance rate inhibition index (CRII). Toxin concentration of oysters was quantified at the end of the experiment. These data allowed to estimate the toxin accumulation efficiency (TAE) as the ratio of toxin accumulated on toxin consumed. Changes of clearance rate during the experiment indicated that all individuals stopped feeding immediately after being exposed to A. minutum for at least 7 h. This fast response likely corresponded to a behavioral mechanism of avoidance rather to a toxin-induced response. Individuals also showed high inter-variability in their recovery of filtration after this period. Most of the inter-individual variability (78%) in PST accumulation in C. gigas could be explained by the consumption of A. minutum cells, thus emphasizing the importance of the feeding behavior in accumulation. Based on the toxin concentration in their tissues, oysters were clustered in 3 groups showing contrasted patterns of PST accumulation: the high accumulation group was characterized by high feeding rates both on non-toxic and toxic diet and subsequently a low CRII and high TAE. Inversely, the low accumulation group was characterized by low filtration rates, high CRII and low TAE. Both filtration capacity and sensitivity of oysters to toxins may account for the differences in their accumulation. The contribution of TAE in PST accumulation is discussed and might result from differences in assimilation and detoxification abilities among individuals. |
format |
Text |
author |
Pousse, Emilien Flye-sainte-marie, Jonathan Alunno-bruscia, Marianne Hegaret, Helene Jean, Fred |
author_facet |
Pousse, Emilien Flye-sainte-marie, Jonathan Alunno-bruscia, Marianne Hegaret, Helene Jean, Fred |
author_sort |
Pousse, Emilien |
title |
Sources of paralytic shellfish toxin accumulation variability in the Pacific oyster Crassostrea gigas |
title_short |
Sources of paralytic shellfish toxin accumulation variability in the Pacific oyster Crassostrea gigas |
title_full |
Sources of paralytic shellfish toxin accumulation variability in the Pacific oyster Crassostrea gigas |
title_fullStr |
Sources of paralytic shellfish toxin accumulation variability in the Pacific oyster Crassostrea gigas |
title_full_unstemmed |
Sources of paralytic shellfish toxin accumulation variability in the Pacific oyster Crassostrea gigas |
title_sort |
sources of paralytic shellfish toxin accumulation variability in the pacific oyster crassostrea gigas |
publisher |
Pergamon-elsevier Science Ltd |
url |
https://doi.org/10.1016/j.toxicon.2017.12.050 https://archimer.ifremer.fr/doc/00416/52789/53688.pdf https://archimer.ifremer.fr/doc/00416/52789/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_source |
Archimer, archive institutionnelle de l'Ifremer Toxicon (0041-0101) (Pergamon-elsevier Science Ltd), 2018-03 , Vol. 144 , P. 14-22 |
op_relation |
doi:10.1016/j.toxicon.2017.12.050 10670/1.l27ipu https://archimer.ifremer.fr/doc/00416/52789/53688.pdf https://archimer.ifremer.fr/doc/00416/52789/ |
op_doi |
https://doi.org/10.1016/j.toxicon.2017.12.050 |
container_title |
Toxicon |
container_volume |
144 |
container_start_page |
14 |
op_container_end_page |
22 |
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1766394207803539456 |