Fate of domoic acid ingested by the copepod Acartia clausi

被引:0
作者
Isabel Maneiro
Paula Iglesias
Cástor Guisande
Isabel Riveiro
Aldo Barreiro
Soultana Zervoudaki
Edna Granéli
机构
[1] Universidad de Vigo,Facultad de Ciencias del Mar
[2] Hellenic Center for Marine Research,Marine Sciences Department
[3] University of Kalmar,undefined
来源
Marine Biology | 2005年 / 148卷
关键词
Phytoplankton; Domoic Acid; Toxin Concentration; Toxin Content; Toxin Accumulation;
D O I
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中图分类号
学科分类号
摘要
Two important issues in the studies of harmful algae include ecological role of the toxic compounds and their fate through the food web. The aims of this study were to determine whether the production of domoic acid is a strategy evolved to avoid predation and the role of copepods in the fate of this toxic compound through the food web. The copepod Acartia clausi was fed with single and mixed cultures of the toxic diatom Pseudo-nitzschia multiseries and the non-toxic diatom Pseudo-nitzschiadelicatissima. Ingestion rate as a function of diatom abundance was the same for the toxic and non-toxic Pseudo-nitzschia species, indicating no selective feeding behaviour against P. multiseries. The toxins ingested by the copepods did not affect mortality, feeding behaviour, egg production and egg hatching of the copepods. Copepods assimilated the 4.8% of the total domoic acid ingested. Although the amount of toxins daily detoxificated by the copepods was 63.6%, the copepods accumulated domoic acid in their tissues. We conclude that domoic acid is not toxic for copepods and, probably for this reason, this toxin does not act as feeding deterrent for copepods. However, even though the production of domoic acid has apparently not evolved to deter predation, copepods may play an important role on the fate of this toxic compound through the marine food web.
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页码:123 / 130
页数:7
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