Toxicology of a Microcystis ichthyoblabe waterbloom from Lake Oued Mellah (Morocco)

• Tipo: Artigo em Revista Científica Internacional
• Data: 2002

Autores

Sabour, B (Autor) Outra; Loudiki, M (Autor) Outra; Oudra, B (Autor) Outra; Vasconcelos, V (Autor) FCUP; Martins, R (Autor) Outra; Oubraim, S (Autor) Outra; Fawzi, B (Autor) Outra

Revista

Título: Environmental Toxicology

Vol. 17

Páginas: 24-31

ISSN: 1520-4081

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 32 Citações

Scopus - 37 Citações

Classificação Científica

FOS: Ciências médicas e da saúde > Medicina básica

Outras Informações

ID Authenticus: P-000-QD9

DOI: 10.1002/tox.10028

Abstract (EN): In the Lake Oued Mellah cyanobacteria waterblooms occur periodically in late spring and summer with Microcystis ichthyoblabe as the main bloom-forming species. In 1999, a heavy waterbloom of M. ichthyoblabe occurred during May June with a maximal biomass of 298 mg/l. During this period, several bloom samples were collected. The toxicity assessment was done by mouse and brine shrimp (Artemia) bioassays. Apart from the sample collected on 15/06/1999, all the other samples were toxic by mouse bioassay. The LD50 determined by intraperitoneal injection to mice during active cyanobacterial growth and decline phases were 518 and 1924 mgDW/kg respectively. Using Artemia bioassay, the 24hLC(50) varied from 6.0 to 40.6 mg/ml and the 48hLC(50) ranged from 2.8 to 18.2 mg/ml. The separation and identification of microcystin variants was performed by high performance liquid chromatography-photodiode array detection. Eleven toxins were separated and preliminarily identified as microcystin variants as they exhibit a typical UV spectra like the microcystin-LR standard. The quantification of total microcystins determined by enzyme-linked immunosorbent assay showed that the contents were varied between 0.1 and 0.76 mug/g DW (C) 2002 by Wiley Periodicals, Inc.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8