Effects of the microcystin profile of a cyanobacterial bloom on growth and toxin accumulation in common carp Cyprinus carpio larvae

A 12 day growth trial was conducted to compare the effect of the variation in microcystins (MC) composition of two bloom samples of Microcystis aeruginosa on the growth performance and microcystin accumulation in common carp Cyprinus carpio larvae. Two M. aeruginosa natural bloom samples with differ...

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Bibliographic Details
Published in:Journal of fish biology 2010-04, Vol.76 (6), p.1415-1430
Main Authors: El Ghazali, I., Saqrane, S., Carvalho, A. P., Ouahid, Y., Del Campo, F. F., Vasconcelos, V., Oudra, B.
Format: Article
Language:English
Subjects:
Animals
carp larvae
Carps - growth & development
Carps - metabolism
cyanobacterial blooms
Cyprinus carpio
Diet
fish growth
Freshwater
Harmful Algal Bloom
Larva - growth & development
Larva - metabolism
microcystins
Microcystins - analysis
Microcystins - metabolism
Microcystins - toxicity
microcystins accumulation
Microcystis
Microcystis aeruginosa
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Summary:A 12 day growth trial was conducted to compare the effect of the variation in microcystins (MC) composition of two bloom samples of Microcystis aeruginosa on the growth performance and microcystin accumulation in common carp Cyprinus carpio larvae. Two M. aeruginosa natural bloom samples with different MC profiles were collected and larvae were exposed to cyanobacterial cells through their diet. Three diets, a basal control diet and two diets prepared from the basal diet plus the same toxins content (60 ng MC g−1 diet) of each cyanobacterial bloom, were given at the same ration level to three groups of larvae during the experimental period. Larval mass and standard length from day 9 were significantly different between cyanobacterial treatments and in both cases lower than that of the control. The MC accumulation by larvae, inversely correlated with the growth performance, was also significantly different between cyanobacterial treatments (26·96 v. 17·32 ng g−1 at the end of the experimental period). These results indicate that MC variants profile may have effects on the toxin uptake and toxicity. To date, this is the first laboratory study to show that fish accumulate MC depending on the toxin profile of the cyanobacterial bloom.
ISSN:0022-1112
1095-8649
DOI:10.1111/j.1095-8649.2010.02572.x