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Demographic responses of Daphnia magna fed transgenic Bt-maize

Permanent lenke
https://hdl.handle.net/10037/19105
DOI
https://doi.org/10.1007/s10646-009-0427-x
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article.pdf (398.8Kb)
Publisert versjon (PDF)
Dato
2009-10-27
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Bøhn, Thomas; Traavik, Ingemar Terje; Primicerio, Raul
Sammendrag
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.
Forlag
Springer Nature
Sitering
Bøhn, T., Traavik, T. & Primicerio, R. (2010). Demographic responses of Daphnia magna fed transgenic Bt-maize. Ecotoxicology, 19(2), 419-430.
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  • Artikler, rapporter og annet (arktisk og marin biologi) [1630]
Copyright 2009 The Authors

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