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General Information

Document type
  • Peer-reviewed journal article
GE organism
  • maize
GE trait
  • insect resistance
  • Norway


Safety for environment
  • negative effect

Demographic responses of Daphnia magna fed transgenic Bt-maize Open Access

Bøhn, T; Traavik, T; Primicerio, R
Ecotoxicology. 2010 February. 19(2):419-30

Link to full text (open access, freely available)

PMID: 19859805 DOI: 10.1007/s10646-009-0427-x ISSN: 0963-9292


The food/feed quality of a variety of genetically modified (GM) maize expressing Cry1Ab Bt-toxin was tested over the life-cycle of Daphnia magna, an arthropod commonly used as model organism in ecotoxicological studies. Demographic responses were compared between animals fed GM or unmodified (UM) near isogenic maize, with and without the addition of predator smell. Age-specific data on survival and birth rates were integrated and analysed using life tables and Leslie matrices. Survival, fecundity and population growth rate (PGR) data generally disfavoured transgenic Bt-maize as feed for D. magna compared to animals fed the unmodified (UM) near isogenic line of maize. Decomposition of age-specific effects revealed that the most important contributions to a reduced PGR in the GM-fed group came from both fecundity and survival differences early in life. We conclude that juvenile and young adult stages are the most sensitive experimental units and should be prioritized in future research. These stages are often omitted in toxicological/ecotoxicological studies and in feeding trials.


Age structure, Ecotoxicology, Genetic engineering, Sensitivity, Substantial equivalence, Survival


Funding source
  • Research Council of Norway
Funding country
  • Norway
Funding type
  • government

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Cite this study


Bøhn, T, T Traavik, R Primicerio. "Demographic responses of Daphnia magna fed transgenic Bt-maize." Ecotoxicology 19.2 (2010): 419-30. Web. 7 Dec. 2023.


Bøhn, T., Traavik, T., & Primicerio, R. (2010). Demographic responses of Daphnia magna fed transgenic Bt-maize. Ecotoxicology, 19(2), 419-30. doi:10.1007/s10646-009-0427-x

Please verify citations before use, citations are automatically generated based on information stored within the GENERA database and therefore may or may not be correct.