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Feeding of Fragilidium cf. duplocampanaeforme and F. subglobosum on four Dinophysis species: prey specificity, local adaptation and fate of toxins

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untranslatedFeeding of Fragilium.pdf (880.7Kb)
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URI: http://hdl.handle.net/10508/2377
DOI: 10.3354/ame01700
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Authors
Rodríguez, F. (Francisco); Riobó, P. (Pilar); Rial, P. (Pilar); Reguera, B. (Beatriz); Franco, J.M. (José Mariano)
Editor's version
http://www.int-res.com/articles/ame2013/72/a072p241.pdf
Date
2014-06-02
Type
research article
Keywords
Fragilidium
Dinophysis
Dinoflagellates
Predation
Abstract
We studied the feeding behaviour of 2 Fragilidium species—F. cf. duplocampanaeforme (strains VGO1120 and VGO692 from NW Iberia and the Mediterranean Sea, respectively), and F. subglobosum (IO97-01, W Iberia)—on Dinophysis acuminata, D. acuta, D. caudata and D. tripos from NW Iberia. Only the Atlantic strain of F. cf. duplocampanaeforme fed upon D. acuminata (2.52 ± 0.48 cells Fragilidium-1 d-1) and D. caudata (0.58 ± 0.32 cells Fragilidium-1 d-1); furthermore, this strain fed weakly on D. tripos (<0.10 cells Fragilidium-1 d-1) and not at all on D. acuta. Neither the Mediterranean F. duplocampanaeforme nor F. subglobosum were observed to ingest Atlantic strains of Dinophysis species. Deleterious effects caused by Fragilidium, namely cell immobilization or even death, were observed in some cases (the D. acuminata and D. caudata cultures). The Atlantic F. cf. duplocampanaeforme that had previously fed on D. acuminata and D. caudata showed low intracellular toxin levels at the end of the ...

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