Effect of different microcystin profiles on toxin bioaccumulation in common carp (Cyprinus carpio) larvae via Artemia nauplii

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Issam El Ghazali (Author) Other; Sanaa Saqrane (Author) Other; António Paulo Carvalho (Author) Other; Youness Ouahid (Author) Other; Francisca F Del Campo (Author) Other; Brahim Oudra (Author) Other; Vitor Vasconcelos (Author) Other

Journal

Title: Ecotoxicology and Environmental Safety

Vol. 73 No. 4

Pages: 762-770

ISSN: 0147-6513

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 27 Citations

Scopus - 32 Citations

Other information

Authenticus ID: P-003-55F

DOI: 10.1016/j.ecoenv.2009.12.015

Abstract (EN): In this study, a 12-day growth trial was conducted to compare the effect of the variation in microcystin (MC) composition in two Microcystis aeruginosa bloom samples on the growth performance and MC accumulation/transfer in the common carp (Cyprinus carpi L) larvae. Fish were fed Anemia sauna nauplii that had been preexposed to extracts from two M. aeruginosa natural blooms with different microcystins (MCs) profiles. Bloom A had MC-LR as major toxin (74.05%) while bloom B had a diversity of MC (MC-RR; MC-(H4)YR; MC-YR; MC-LR; MC-FR; MC-WR) with no dominance of MC-LR. Newly-hatched Artemia nauplii were exposed separately to the two M. aeruginosa extracts A and B (100 mu g L(-1) Eq MC-LR) for 2 h. The MC concentration in the nauplii was 73.60 +/- 7.88 ng Eq MC-LR g(-1) FW (n=4, mean +/- SE) for bloom A and 87.04 +/- 10.31 ng Eq MC-LR g(-1) FW for bloom B. These contaminated nauplii were given at the same ration to different groups (A and B) of fish larvae. Larval weight and length from day 9 were significantly different between groups A and B. and in both cases lower than that of a control group fed non-exposed nauplii. MCs accumulation by larvae, inversely correlated with the growth performance, was also significantly different between groups A and B (37.43 +/- 2.61 and 54.55 +/- 3.01 ng Eq MC-LR g(-1) FW, respectively, at the end of the experimental period). These results indicate that MC profile of a bloom may have differential effects on toxin accumulation/transfer and toxicity.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9