Marine Ecology Progress Series
By L. Airoldi. 2007
106 citations recorded by the source corpus.
Uptake kinetics of paralytic shellfish toxins from the dinoflagellate Alexandrium fundyense in the mussel Mytilus edulis* ABSTRACT A laboratory study ~ n v e s t ~ g a t e d cell ingestion, absorption of organlc matter, and paralytic shellfish poisoning (PSP) toxin ~ncorporation by iclytilus eduljs exposed to a high-tox~city isolate of the red tide dinoflagellate Alexandrium fundyense (strain GtCA29, toxicity = 66 pg saxltoxin equivalents (STXeq) cell-'). Maximum ingestion rate was achieved at 150 to 250 cells ml-' Clearance rates on A. fundyense were about 48'1.;) lower than those for a non-toxic control diet of the diatom Thalassioslra weissflogii. Mussels with no prior h~story of exposure to PSP maintained a constant ingest~on rate over 17 d of exposure to a A. fundyense (at 256 cells ml-l), and absorbed ca 6 2 % of the organic matter ingested. They experienced no mortality or sublethal adverse effects during intoxication. Maximum (saturation) toxin levels of 4.5 X 10"ig STXeq 100g-' were attained after 12 to 13 d. a value comparable to maximum toxicities reported during major toxic bloom events. Mussels could exceed the quarantine toxin level (80 pg STXeq 100g-l) in < 1 h of exposure to high densities of this isolate. At saturation, they incorporated 79 O/o of the toxin ingested, primarily in the viscera. This provides the first estimate of toxin incorporation efficiency in a bivalve under steady state conditions. Dinoflagellate toxins, determined by HPLC, were dominated by carbamate derivatives. The muscle, mantle/gill and foot of M. edulis showed significant enrichment in STX and reduction in the gonyautoxins GTX2+3 and neoSTX relative to ingested cells. The toxin composition of the viscera more closely resembled that of ingested cells, reflecting the presence of numerous intact cells in gut contents. Through its potential use of A. fundyense as a sole food source, M eduljs is thus capable of remarkably efficient toxln accumulation at environmentally realistic dinoflagellate cell densities.
Subfields: Ecology, Management, Monitoring, Policy and Law, Oceanography
View Paper: https://www.semanticscholar.org/paper/a9286d566839017dd8ba1baa33c80613880fbe8f
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Citations in the corpus
- Nickel Utilization in Phytoplankton Assemblages From Contrasting Oceanic Regimes (2010, unknown): “Most marine phytoplankton, including cyanobacteria (Collier et al., 1999), coccolithophores (Palenik and Henson, 1997), dinoflagellates (Dyhrman and Anderson, 2003), cryptophytes, chrysophytes, and prasinophytes (Oliveria and Antia, 1986), use the Ni-containing enzyme urease to hydrolyze urea to…”
- Recent trends in paralytic shellfish toxins in Puget Sound, relationships to climate, and capacity for prediction of toxic events (2009, background): “column, and concentrations of PSTs in their tissues have been shown to exceed the regulatory limit in <1 h of exposure to a toxic strain of Alexandrium in the laboratory (Bricelj et al., 1990).”
- Summary for Policymakers (2022, unknown): “Moving out of the laboratory and into the real world of nature, Adjeroud et al. (2005) initiated a monitoring program on 13 islands (eight atolls and five high volcanic islands) in four of the five archipelagoes of French Polynesia, with the goal of documenting the effects of natural perturbations o”
- Bottom-up and top-down controls of walleye pollock ( Theragra chalcogramma) on the Eastern Bering Sea shelf (2006, unknown): “The average weekly percentage of ice-covered ocean was calculated for January–May (approximately corresponding to International Organization for Standardization, or ISO week numbers 1–22) using ArcGIS geographic information system software (Ormsby et al., 2001).”
- Large bio-geographical shifts in the north-eastern Atlantic Ocean: From the subpolar gyre, via plankton, to blue whiting and pilot whales (2009, unknown): “2), where the cold and fresh subarctic water masses (Bersch, 2002; Pollard et al., 2004) were replaced by warmer and more saline water masses from the south (Bersch et al., 2007).”
- Trophic interactions of macro-zooplankton (krill and amphipods) in the Marginal Ice Zone of the Barents Sea (2008, unknown): “Several studies have shown the importance of Arctic amphipod T. libellula as prey for the polar cod, harp seals, and sea birds in the central Arctic waters of the Barents Sea (Lønne and Gulliksen, 1989; Nilssen et al., 1992).”