GLORIA — GEOMAR Library Ocean Research Information Access

Treffer pro Seite

Treffer 1 - 2 | 2 Treffer

Sortierung

Digitale Medien

Potential impact of a toxic dinoflagellate (Alexandrium excavatum) bloom on survival of fish and crustacean larvae (1991)

Robineau, B. ; Gagné, J. A. ; Fortier, L. ; [weitere]

Springer

Marine biology 108 (1991), S. 293-301

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-1793

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract We investigated the impact of neurotoxins produced by the dinoflagellateAlexandrium excavatum on survival of Atlantic mackerel (Scomber scombrus) and American lobster (Homarus americanus) larvae, respectively reared from eggs and from female lobster, collected in 1988 from the southern Gulf of St. Lawrence, Canada. Sensitivity to the toxins was first verified by exposing larvae of both species to various concentrations of toxicA. excavatum (treatment) and non-toxicA. tamarense (control). Daily mortality rates ranged from 65 to 96% among mackerel larvae directly fed upon toxic cells and reached 36% in postlarvae exposed to toxic microzooplankton. Lobster larvae were apparently immune to the toxins, which they concentrated up to five times relative to vector toxicities. Bioassays conducted on mackerel larvae by exposure to natural plankton samples collected in situ during a bloom of toxicA. excavatum confirmed that exposure to the toxins could also have lethal effects in natural ecosystems. We conclude that the current proliferation of toxic dinoflagellates threatens early survival of finfish larvae and their recruitment to adult populations.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01344344

Permalink

	Standort	Signatur	Einschränkungen	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Ion-spray mass spectrometry of marine toxins II. Analysis of diarrhetic shellfish toxins in plankton by liquid chromatography/mass spectrometryNRCC No. 31309. (1990)

Pleasance, S. ; Quilliam, M. A. ; de Freitas, A. S. W. ; [weitere]

New York, NY : Wiley-Blackwell

Rapid Communications in Mass Spectrometry 4 (1990), S. 206-213

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0951-4198

Schlagwort(e): Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Physik

Notizen: A combined liquid chromatography/mass spectrometry (LC/MS) method using ion-spray ionization is described for the sensitive determination of okadaic acid and dinophysistoxin-1, the principal toxins implicated in cases of diarrhetic shellfish poisoning. The method is used to confirm the presence of okadaic acid in a culture of the dinoflagellate species Prorocentrum concavum and in natural populations of dinoflagellates from eastern Canadian waters. Several analogues of the toxin have also been detected. Quantitative results are comparable to those obtained by high performance liquid chromatography with fluorescence detection. With slight modifications, the LC/MS method is also used to analyse the fluorescent anthrylmethyl ester of okadaic acid. Preliminary tandem mass spectrometric results, obtained using fast-atom bombardment ionization, are presented for okadaic acid.

Zusätzliches Material: 8 Ill.