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Reduction of cyanobacterial toxins through coprophagy in Mytilus edulis

Svensen, C.; Strogyloudi, E.; Riser, C. W.; Dahmann, J.; Legrand, C.; Wassmann, P.; Graneli, Edna LU and Pagou, K. (2005) In Harmful Algae 4(2). p.329-336
Abstract
An experiment was conducted to follow the fate of the cyanobacterial toxin, nodularin, produced by Nodularia spumigena through ingestion by Mytilus edulis and re-ingestion of faecal material (coprophagy). Mussels were fed with cultures of N. spumigena, and the faeces that were produced were fed to other mussels not previously exposed to N. spumigena. Concentrations of nodularin were measured in the food (N. spumigena), the mussels and in the faeces in order to make a toxin budget. High concentrations of nodularin were found in the mussels and their faeces after 48 h incubation with N. spumigena. When the toxic faeces were fed to new mussels, the toxin content of faeces was reduced from 95 mug nod g(-1) dry weight (DW) to 1 mug nod g(-1) DW... (More)
An experiment was conducted to follow the fate of the cyanobacterial toxin, nodularin, produced by Nodularia spumigena through ingestion by Mytilus edulis and re-ingestion of faecal material (coprophagy). Mussels were fed with cultures of N. spumigena, and the faeces that were produced were fed to other mussels not previously exposed to N. spumigena. Concentrations of nodularin were measured in the food (N. spumigena), the mussels and in the faeces in order to make a toxin budget. High concentrations of nodularin were found in the mussels and their faeces after 48 h incubation with N. spumigena. When the toxic faeces were fed to new mussels, the toxin content of faeces was reduced from 95 mug nod g(-1) dry weight (DW) to 1 mug nod g(-1) DW through the process of coprophagy. Hence, when toxic faeces were fed to mussels, the nodularin concentration of the resulting faecal material was reduced by 99%. Pseudofaeces were produced when the mussels were grazing on N. spumigena, but not when grazing on faeces. The pseudofaeces contained high concentrations of nodularin and apparently intact N. spumigena cells. However, these cells were growth-inhibited and their potential contribution to seeding a bloom is probably limited. Our data indicate that a large fraction of ingested nodularin in M. edulis is egested with the faeces, and that the concentration of nodularin in the faeces is reduced when faeces are re-ingested. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
categories
Higher Education
in
Harmful Algae
volume
4
issue
2
pages
329 - 336
publisher
Elsevier
external identifiers
  • scopus:10944248066
ISSN
1878-1470
DOI
10.1016/j.hal.2004.06.015
language
English
LU publication?
no
id
372ab965-18ec-4be9-ab9e-66b0d4c17e0c (old id 7994162)
date added to LUP
2015-09-29 11:49:55
date last changed
2017-01-08 03:42:39
@article{372ab965-18ec-4be9-ab9e-66b0d4c17e0c,
  abstract     = {An experiment was conducted to follow the fate of the cyanobacterial toxin, nodularin, produced by Nodularia spumigena through ingestion by Mytilus edulis and re-ingestion of faecal material (coprophagy). Mussels were fed with cultures of N. spumigena, and the faeces that were produced were fed to other mussels not previously exposed to N. spumigena. Concentrations of nodularin were measured in the food (N. spumigena), the mussels and in the faeces in order to make a toxin budget. High concentrations of nodularin were found in the mussels and their faeces after 48 h incubation with N. spumigena. When the toxic faeces were fed to new mussels, the toxin content of faeces was reduced from 95 mug nod g(-1) dry weight (DW) to 1 mug nod g(-1) DW through the process of coprophagy. Hence, when toxic faeces were fed to mussels, the nodularin concentration of the resulting faecal material was reduced by 99%. Pseudofaeces were produced when the mussels were grazing on N. spumigena, but not when grazing on faeces. The pseudofaeces contained high concentrations of nodularin and apparently intact N. spumigena cells. However, these cells were growth-inhibited and their potential contribution to seeding a bloom is probably limited. Our data indicate that a large fraction of ingested nodularin in M. edulis is egested with the faeces, and that the concentration of nodularin in the faeces is reduced when faeces are re-ingested.},
  author       = {Svensen, C. and Strogyloudi, E. and Riser, C. W. and Dahmann, J. and Legrand, C. and Wassmann, P. and Graneli, Edna and Pagou, K.},
  issn         = {1878-1470},
  language     = {eng},
  number       = {2},
  pages        = {329--336},
  publisher    = {Elsevier},
  series       = {Harmful Algae},
  title        = {Reduction of cyanobacterial toxins through coprophagy in Mytilus edulis},
  url          = {http://dx.doi.org/10.1016/j.hal.2004.06.015},
  volume       = {4},
  year         = {2005},
}