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Juvenile food limitation in standardized tests: a warning to ecotoxicologists
- Source :
- Ecotoxicology, Ecotoxicology, Springer Verlag, 2012, 21 (8), pp.2195-204. ⟨10.1007/s10646-012-0973-5⟩, Ecotoxicology, 21, 2195-2205. Springer Netherlands, Ecotoxicology (London, England), Zimmer, E I, Jager, T, Ducrot, V & Kooijman, S A L M 2012, ' Juvenile food limitation in standard tests: a warning to ecotoxicologists. ', Ecotoxicology, vol. 21, pp. 2195-2205 . https://doi.org/10.1007/s10646-012-0973-5
- Publication Year :
- 2012
- Publisher :
- HAL CCSD, 2012.
-
Abstract
- Standard ecotoxicological tests are as simple as possible and food sources are mainly chosen for practical reasons. Since some organisms change their food preferences during the life-cycle, they might be food limited at some stage if we do not account for such a switch. As organisms tend to respond more sensitively to toxicant exposure under food limitation, the interpretation of test results may then be biased. Using a reformulation of the von Bertalanffy model to analyze growth data of the pond snail Lymnaea stagnalis, we detected food limitation in the early juvenile phase. The snails were held under conditions proposed for a standardized test protocol, which prescribes lettuce as food source. Additional experiments showed that juveniles grow considerably faster when fed with fish flakes. The model is based on Dynamic Energy Budget (DEB) theory, which allows for mechanistic interpretation of toxic effects in terms of changes in energy allocation. In a simulation study with the DEB model, we compared the effects of three hypothetical toxicants in different feeding situations. The initial food limitation when fed with lettuce always intensified the effect of the toxicants. When fed with fish flakes, the predicted effect of the toxicants was less pronounced. From this study, we conclude that (i) the proposed test conditions for L. stagnalis are not optimal, and require further investigation, (ii) fish flakes are a better food source for juvenile pond snails than lettuce, (iii) analyzing data with a mechanistic modeling approach such as DEB allows identifying deviations from constant conditions, (iv) being unaware of food limitation in the laboratory can lead to an overestimation of toxicity in ecotoxicological tests. Electronic supplementary material The online version of this article (doi:10.1007/s10646-012-0973-5) contains supplementary material, which is available to authorized users.
- Subjects :
- 0106 biological sciences
Dynamic energy budget
Health, Toxicology and Mutagenesis
[SDV]Life Sciences [q-bio]
Index Medicus
Lymnaea stagnalis
010501 environmental sciences
Biology
Management, Monitoring, Policy and Law
Ecotoxicology
Von bertalanffy
Toxicology
Models, Biological
01 natural sciences
Article
chemistry.chemical_compound
Nutritional status
Growth curve
Animals
Juvenile
Lymnaea
0105 earth and related environmental sciences
Toxicity
010604 marine biology & hydrobiology
Age Factors
Multiple stress
General Medicine
biology.organism_classification
Diet
chemistry
Energy Intake
Dynamic Energy Budget
Energy allocation
Toxicant
Subjects
Details
- Language :
- English
- ISSN :
- 09639292 and 15733017
- Database :
- OpenAIRE
- Journal :
- Ecotoxicology, Ecotoxicology, Springer Verlag, 2012, 21 (8), pp.2195-204. ⟨10.1007/s10646-012-0973-5⟩, Ecotoxicology, 21, 2195-2205. Springer Netherlands, Ecotoxicology (London, England), Zimmer, E I, Jager, T, Ducrot, V & Kooijman, S A L M 2012, ' Juvenile food limitation in standard tests: a warning to ecotoxicologists. ', Ecotoxicology, vol. 21, pp. 2195-2205 . https://doi.org/10.1007/s10646-012-0973-5
- Accession number :
- edsair.doi.dedup.....027349fbe6f774e6c9c462f93456c316
- Full Text :
- https://doi.org/10.1007/s10646-012-0973-5⟩