Food Concentration Affects the Life History Response of Ceriodaphnia cf. dubia to Chemicals with Different Mechanisms of Action

Rose, Rebecca M.; Warne, Michael St. J.; Lim, Richard P.

doi:10.1006/eesa.2001.2137

Cited by 28 publications

(20 citation statements)

References 35 publications

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“…For Ceriodaphnia cf. dubia , Rose et al reported decreased toxicity of fenoxycarb at lower food levels, which was not confirmed for D. magna in the present study. However, the influence of food limitation on the susceptibility of cladocerans generally varies depending on measured endpoints, test species, and test substances .…”

Section: Discussioncontrasting

confidence: 98%

“…The observed high acute‐to‐chronic ratio for fenoxycarb is in agreement with published studies and is a result of its mode of action, that is, inhibition of insect molting by acting as an analogue of the insect juvenile hormone. This endocrine mode of action is known to occur also in cladocerans and caused the change in the toxicity rank order of the substances investigated in the present study.…”

Section: Discussionmentioning

confidence: 75%

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Predicting acute and chronic effects of wood preservative products in daphnia magna and pseudokirchneriella subcapitata based on the concept of concentration addition

Coors

Weisbrod

Schoknecht

et al. 2014

Enviro Toxic and Chemistry

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The current European legislation requires that combined effects of the active substances and any substance of concern contained in biocidal products are taken into account in environmental risk assessment. The hypothesis whether the consideration of active substances together with all formulation additives that are labeled as presenting an environmental hazard is sufficient for a reliable environmental risk assessment was tested in the present study by investigating 3 wood preservative products. Relevant single substances in the products, some of their generic mixtures, the biocidal products themselves, and aqueous eluates prepared from the products (representing potential environmental mixtures) were tested for effects on algal growth and Daphnia acute immobilization as well as reproduction. Predictions for the products and the eluates were based on the concept of concentration addition and were mostly found to provide reliable or at least protective estimates for the observed acute and chronic toxicity of the mixtures. The mixture toxicity considerations also indicated that the toxicity of each product was dominated by just 1 of the components, and that assessments based only on the dominating substance would be similarly protective as a full-mixture risk assessment. Yet, there remained uncertainty in some cases that could be related to the toxicity of transformation products, the impact of unidentified formulation additives, or synergistic interaction between active substances and formulation additives.

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Section: Discussioncontrasting

confidence: 98%

Section: Discussionmentioning

confidence: 75%

Predicting acute and chronic effects of wood preservative products in daphnia magna and pseudokirchneriella subcapitata based on the concept of concentration addition

Coors

Weisbrod

Schoknecht

et al. 2014

Enviro Toxic and Chemistry

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show abstract

“…Also, the internal doses and effects with time can be estimated in accordance with Haber's rule (see above). Ingestion of residues in food appears to be a lesser route of exposure for zooplankton [84] and possibly other aquatic organisms. For terrestrial organisms, however, a more complex scenario is envisaged.…”

Section: Exposure Assessmentmentioning

confidence: 99%

Environmental Risk Assessment of Agrochemicals — A Critical Appraisal of Current Approaches

Sánchez‐Bayo¹,

Tennekes²

2015

Toxicity and Hazard of Agrochemicals

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This chapter provides insights into the difficulties and challenges of performing risk evaluations of agrochemicals. It is a critical review of the current methodologies used in ecological risk assessment of these chemicals, not their risks to humans. After an introduction to the topic, the current framework for ecological risk assessment is outlined. Two types of assessments are typically carried out depending on the purpose: i) regulatory assessments for registration of a chemical product; and ii) ecological assessments, for the protection of both terrestrial and aquatic ecosystems, which are usually site-specific. Although the general framework is well established, the methodologies used in each of the steps of the assessment are fraught with a number of shortcomings. Notwithstanding the subjectivity implicit in the evaluation of risks, there is scepticism in scientific circles about the appropriateness of the current methodologies because, after so many years of evaluations, we are still incapable of foreseeing the negative consequences that some agrochemicals have in the environment. A critical appraisal of such methodologies is imperative if we are to improve the current assessment process and fix the problems we face today. The chapter reviews first the toxicity assessment methods, pointing to the gaps in knowledge about this essential part of the process and suggesting avenues for further improvement. Deficiencies in the current regulations regarding toxicity testing are discussed, in particular the effect of the time factor on toxicity and the issue of complex mixtures.

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“…Many studies have indeed reported an increased sensitivity to a wide range of pollutants of invertebrates grown under limiting food conditions (Chandini 1989; Barry et al 1995;Enserink et al 1995;Klü ttgen et al 1996;Rose et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Modeling responses of Daphnia magna to pesticide pulse exposure under varying food conditions: intrinsic versus apparent sensitivity

et al. 2006

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Food Concentration Affects the Life History Response of Ceriodaphnia cf. dubia to Chemicals with Different Mechanisms of Action

Cited by 28 publications

References 35 publications

Predicting acute and chronic effects of wood preservative products in daphnia magna and pseudokirchneriella subcapitata based on the concept of concentration addition

Predicting acute and chronic effects of wood preservative products in daphnia magna and pseudokirchneriella subcapitata based on the concept of concentration addition

Environmental Risk Assessment of Agrochemicals — A Critical Appraisal of Current Approaches

Modeling responses of Daphnia magna to pesticide pulse exposure under varying food conditions: intrinsic versus apparent sensitivity

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