Fate of domoic acid ingested by the copepod Acartia clausi

Maneiro, Isabel; Iglesias, Paula; Guisande, Cástor; Riveiro, I.; Barreiro, Anabela; Zervoudaki, Soultana; Granéli, Edna

doi:10.1007/s00227-005-0054-x

Cited by 47 publications

(40 citation statements)

References 39 publications

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“…The hypothesis that DA causes physiological incapacitation in copepods does not conflict with findings showing that copepods do not select against toxic Pseudo-nitzschia species, even when nontoxic alternative food is offered (Maneiro et al, 2005;Olson et al, 2006;Leandro et al, 2010). The reason is that the negative effects of DA on grazers are expected to occur only if DA intake by the grazers is high enough, which may not have been the case in the studies by Maneiro et al (2005), Olson et al (2006) and Leandro et al (2010), or that the effects of possible physiological incapacitation by DA are left unnoticed. DA may nevertheless have adverse effects on the fecundity of the grazers, which may lead to subsequent reduced grazing pressure.…”

Section: Discussionmentioning

confidence: 72%

“…DA may nevertheless have adverse effects on the fecundity of the grazers, which may lead to subsequent reduced grazing pressure. However, only two studies have addressed this question and found that feeding on toxic P. multiseries did not affect egg production or egg hatching success of the copepods A. tonsa (Lincoln et al, 2001) or A. clausi (Maneiro et al, 2005). Most copepod grazing experiments on toxic phytoplankton species, however, have not lasted more than 24 h, which may be too short a time to detect the potential adverse effects of phycotoxins on grazers (Turner, 2014).…”

Section: Discussionmentioning

confidence: 99%

“…In most grazing studies on toxic Pseudo-nitzschia the copepods have accumulated DA, but no apparent adverse effects on grazers, e.g. reduced grazing, were detected (Lincoln et al, 2001;Tester et al, 2001;Maneiro et al, 2005;Leandro et al, 2010). Hence, the potential role of DA as a grazing deterrent has not been supported.…”

Section: Introductionmentioning

confidence: 99%

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Induction of domoic acid production in the toxic diatom Pseudo-nitzschia seriata by calanoid copepods

et al. 2015

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a b s t r a c tThe toxic diatom Pseudo-nitzschia seriata was exposed directly and indirectly (separated by a membrane) to copepods, Calanus hyperboreus and C. finmarchicus, to evaluate the effects of the copepods on domoic acid production and chain formation in P. seriata. The toxicity of P. seriata increased in the presence of the copepods. This response was chemically mediated without physical contact between the organisms suggesting that it was induced by potential waterborne cues from the copepods or changes in water chemistry. Domoic acid production may be related to defense against grazing in P. seriata although it was not shown in the present study. To evaluate if the induction of domoic acid production was mediated by the chemical cues from damaged P. seriata cells, live P. seriata cells were exposed to a P. seriata cell homogenate, but no effect was observed. Chain formation in P. seriata was affected only when in direct contact with the copepods. This study suggests that the presence of zooplankton may be one of the factors affecting the toxicity of Pseudo-nitzschia blooms in the field.

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Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 99%

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Induction of domoic acid production in the toxic diatom Pseudo-nitzschia seriata by calanoid copepods

et al. 2015

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“…In any case, these benthic species are mainly found in brackish waters and were not detected in the present study in the Argentine Sea. Finally, DA could have been accumulated in zooplankton feeding on toxic Pseudo-nitzschia (Tester et al, 2001;Maneiro et al, 2005), such that intact diatom cells were no longer identifiable. Thus, even when plankton samples were pre-filtered through a 200 mm mesh to remove large zooplankton before toxin analysis, the presence of DA accumulated in early life stages of zooplankton, their eggs or fecal pellets cannot be excluded.…”

Section: Discussionmentioning

confidence: 99%

Species occurrence of the potentially toxigenic diatom genus Pseudo-nitzschia and the associated neurotoxin domoic acid in the Argentine Sea

et al. 2017

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Keywords:Amnesic shellfish poisoning South-western Atlantic Pseudo-nitzschia diversity P. australis P. brasiliana Domoic acid A B S T R A C TThe marine diatom genus Pseudo-nitzschia, the major known producer of the neurotoxin domoic acid (DA) responsible for the amnesic shellfish poisoning (ASP) syndrome in humans and marine mammals, is globally distributed. The genus presents high species richness in the Argentine Sea and DA has been frequently detected in the last few years in plankton and shellfish samples, but the species identity of the producers remains unclear. In the present work, the distribution and abundance of Pseudo-nitzschia species and DA were determined from samples collected on two oceanographic cruises carried out through the Argentine Sea ($39-47 S) during summer and spring 2013. Phytoplankton composition was analysed by light and electron microscopy while DA was determined by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). The genus Pseudo-nitzschia was recorded in 71 and 86% of samples collected in summer and spring, respectively, whereas DA was detected in only 42 and 21% of samples, respectively. Microscopic analyses revealed at least five potentially toxic species (P. australis, P. brasiliana, P. fraudulenta, P. pungens, P. turgidula), plus putatively non-toxigenic P. dolorosa, P. lineola, P. turgiduloides and unidentified specimens of the P. pseudodelicatissima complex. The species P. australis showed the highest correlation with DA occurrence (r = 0.55; p < 0.05), suggesting its importance as a major DA producer in the Argentine Sea. In the northern area and during summer, DA was associated with the presence of P. brasiliana, a species recorded for the first time in the Argentine Sea. By contrast, high concentrations of P. fraudulenta, P. pungens and P. turgidula did not correspond with DA occurrence. This study represents the first successful attempt to link toxigenicity with Pseudo-nitzschia diversity and cell abundance in field plankton populations in the south-western Atlantic.

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“…They also determined that C. finmarchicus and C. hyperboreus stopped grazing after feeding on Pseudo-nitzschia seriata for 6-12 h and suggested that copepods may be affected by physiological incapacitation caused by ingesting DA. However, DA ingested by the copepod Acartia clausi did not affect mortality, feeding behaviour, egg production, or egg hatching 37 . They also suggested that copepods could absorb 5% of the total DA ingested.…”

Section: Discussionmentioning

confidence: 73%

Accumulation of domoic acid in marine organisms from Sriracha bay, Chonburi province, Thailand

Veschasit¹,

Meksumpun²,

Thawonsode³

et al. 2017

ScienceAsia

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Domoic acid (DA), a toxin produced by diatoms Pseudo-nitzschia and Nitzschia, causes amnesic shellfish poisoning. DA accumulated in marine organisms from Sriracha bay, Chonburi province, Thailand was determined from May 2012 to July 2013. Field surveys and sample collections were conducted every two months. DA content was determined using the enzyme linked immunosorbent assay (ELISA) method and ranged between not detectable and 110 ng/l for plankton. DA content in zooplankton ranged between 0.04 and 0.21 ng/l and in Perna viridis, Crassostrea lugubris, and Pinctada fucata it ranged between 214 and 454, 171 and 371, and 117 and 282 ng/g, respectively. DA content in Secutor megalolepis ranged between not detectable and 44.2 ng/g. DA was found in zooplankton, shellfish, and fish from Sriracha bay throughout the year. The amount of DA accumulation in marine organisms was lower than the regulation level (20 µg/g). Average DA content in zooplankton, shellfish, and fish throughout the year were 42%, 44%, and 5% of the DA content in phytoplankton, respectively. DA transfers from phytoplankton to zooplankton and shellfish were 7% and 8%, respectively, while transfer from zooplankton to fish was 2%.

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Fate of domoic acid ingested by the copepod Acartia clausi

Cited by 47 publications

References 39 publications

Induction of domoic acid production in the toxic diatom Pseudo-nitzschia seriata by calanoid copepods

Induction of domoic acid production in the toxic diatom Pseudo-nitzschia seriata by calanoid copepods

Species occurrence of the potentially toxigenic diatom genus Pseudo-nitzschia and the associated neurotoxin domoic acid in the Argentine Sea

Accumulation of domoic acid in marine organisms from Sriracha bay, Chonburi province, Thailand

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