Interactions between Filter-Feeding Bivalves and Toxic Diatoms: Influence on the Feeding Behavior of Crassostrea gigas and Pecten maximus and on Toxin Production by Pseudo-nitzschia
| Type | Article | ||||||||||||
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| Date | 2021-08 | ||||||||||||
| Language | English | ||||||||||||
| Author(s) | Sauvey Aurore1, 2, Denis Françoise3, 4, Hégaret Helene 5, Le Roy Bertrand1, 2, Lelong Christophe6, Jolly Orianne7, Pavie Marie2, Fauchot Juliette1, 2 |
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| Affiliation(s) | 1 : Normandie Université, UNICAEN, CNRS UMR 8067, BOREA, 14000 Caen, France 2 : Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques (BOREA)—Université de Caen Normandie, MNHN, SU, UA, CNRS UMR 8067, IRD 207, 14000 Caen, France 3 : Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques (BOREA)—MNHN, CNRS UMR 8067, SU, IRD 207, UCN, UA, Station de Biologie Marine, MNHN, 29900 Concarneau, France 4 : Laboratoire Mer, Molécules, Santé, EA 2160 MMS, Le Mans Université, CEDEX 9, 72085 Le Mans, France 5 : Laboratoire des Sciences de l’Environnement Marin (LEMAR), UMR 6539 CNRS, UBO, IRD, Ifremer, IUEM, Technopôle Brest-Iroise, Rue Dumont d’Urville, 29280 Plouzané, France 6 : Normandie Université, UNICAEN, EA2608, OeReCa, 14000 Caen, France 7 : Normandie Université, UNICAEN, Centre de Recherches en Environnement Côtier (CREC)—Station Marine, Université de Caen Normandie, 14530 Luc-sur-Mer, France |
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| Source | Toxins (2072-6651) (MDPI AG), 2021-08 , Vol. 13 , N. 8 , P. 577 (19p.) | ||||||||||||
| DOI | 10.3390/toxins13080577 | ||||||||||||
| WOS© Times Cited | 3 | ||||||||||||
| Note | This article belongs to the Special Issue Phycotoxins: From Producers to Transfer in the Food Chain | ||||||||||||
| Keyword(s) | domoic acid, filter-feeding bivalves, Pseudo-nitzschia, interactions, filtration, toxin accumulation, Crassostrea gigas, Pecten maximus | ||||||||||||
| Abstract | Among Pseudo-nitzschia species, some produce the neurotoxin domoic acid (DA), a source of serious health problems for marine organisms. Filter-feeding organisms—e.g., bivalves feeding on toxigenic Pseudo-nitzschia spp.—are the main vector of DA in humans. However, little is known about the interactions between bivalves and Pseudo-nitzschia. In this study, we examined the interactions between two juvenile bivalve species—oyster (Crassostrea gigas) and scallop (Pecten maximus)—and two toxic Pseudo-nitzschia species—P. australis and P. fraudulenta. We characterized the influence of (1) diet composition and the Pseudo-nitzschia DA content on the feeding rates of oysters and scallops, and (2) the presence of bivalves on Pseudo-nitzschia toxin production. Both bivalve species fed on P. australis and P. fraudulenta. However, they preferentially filtered the non-toxic Isochrysis galbana compared to Pseudo-nitzschia. The presence of the most toxic P. australis species resulted in a decreased clearance rate in C. gigas. The two bivalve species accumulated DA in their tissues (up to 0.35 × 10−3 and 5.1 × 10−3 µg g−1 for C. gigas and P. maximus, respectively). Most importantly, the presence of bivalves induced an increase in the cellular DA contents of both Pseudo-nitzschia species (up to 58-fold in P. fraudulenta in the presence of C. gigas). This is the first evidence of DA production by Pseudo-nitzschia species stimulated in the presence of filter-feeding bivalves. The results of this study highlight complex interactions that can influence toxin production by Pseudo-nitzschia and accumulation in bivalves. These results will help to better understand the biotic factors that drive DA production by Pseudo-nitzschia and bivalve contamination during Pseudo-nitzschia blooms |
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