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Development of chronic toxicity test methods for selected indigenous riverine macroinvertebrates
Expanded Title:The project aims included the development of chronic toxicity test methods for indigenous riverine invertebrates using non-lethal experimental end-point assessment criteria (such as stress proteins, measures of growth and fecundity and morphometric analyses for both nymph and adult stages. The use of newly developed chronic toxicity test methods for indigenous invertebrates, was tested, to evaluate the current method of determining water quality criteria for the ecological Reserve, which uses single-substances and mortality as an end-point. Whether effluent standards could be assessed by testing the newly developed chronic toxicity test method using whole effluent, was investigated. A scoping study of the use of stress proteins and morphometric analyses was completed to examine how these approaches could be used in combination with biomonitoring and water chemistry information for the evaluation of non-point source pollution and pesticide contamination, (Gordon et al. 2009). There is a comparison of results of chronic toxicity tests using indigenous invertebrates to those using of D. pulex in an ongoing benchmark assessment of the use of D. pulex to determine water quality criteria for South African rivers. The freshwater shrimp, Caridina nilotica proved to be a valuable test organism on the development of chronic test procedures. Potentially, an effect on growth in juveniles can be measured within 20 days, which is significantly shorter than a full life cycle test, although effects of reproduction will then be missed. The results suggest that the embryonic development of C. nilotica can be a valuable indicator of contamination in freshwaters The investigation on the usefulness of sub-lethal biomarkers in environmental water quality management in water resource management was commenced under this project, but it was in fact superceded by WRC Project 1484/1/09
Date Published:02/10/2011
Document Type:Research Report
Document Subjects:Ecosystem - Invertebrates
Document Keywords:Water Quality
Document Format:Report
Document File Type:pdf
Research Report Type:Standard
WRC Report No:1313/3/11
ISBN No:978-1-4312-0167-9
ISBN Set No:1-77005-240-2
Authors:Muller WJ; Slaughter AR; Ketse N; Davies-Coleman HD; de Kock E; Palmer CG
Project No:K5/1313
Originator:WRC
Organizations:Unilever Centre for Environmental Water Quality Institute for Water Research Rhodes University
Document Size:1 763 KB
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