IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Age and exposure duration as a factor influencing Cu and Zn toxicity toward Daphnia magna
Muyssen, B.T.A.; Janssen, C.R. (2007). Age and exposure duration as a factor influencing Cu and Zn toxicity toward Daphnia magna. Ecotoxicol. Environ. Saf. 68(3): 436-442
In: Ecotoxicology and Environmental Safety. Academic Press/Elsevier: Amsterdam, Netherlands etc.. ISSN 0147-6513, more
Peer reviewed article  

Available in Authors 

Keywords
    Adaptation; Age; Developmental stages; Duration; Ecotoxicology; Environment; Metal; Reproduction; Toxicity; Zinc; Arthropoda [WoRMS]; Branchiopoda [WoRMS]; Cladocera [WoRMS]; Crustacea [WoRMS]; Daphnia magna Straus, 1820 [WoRMS]; Invertebrata; Fresh water

Authors  Top 
  • Muyssen, B.T.A., more
  • Janssen, C.R., more

Abstract
    Standardized toxicity tests are generally performed with juvenile test organisms, e.g., in Daphnia magna assays neonates < 24 h old are used. The purpose of this research was to investigate the influence of a delayed exposure to Cu and Zn on population parameters and toxicity values derived from these endpoints. Juveniles (< 24 h; TO) and 7-d old daphnids (T7) were exposed for 21 and 14 d, respectively. For Cu, juveniles were significantly more sensitive than 7 d old organisms following acute (48 h) as well as chronic (14 d) exposure. After 14d of exposure to 130μg/L Cu, mortality was 80% and 10% in TO and T7, respectively. Juveniles per surviving female at this concentration decreased by 78% and 14% compared to the control. 14d-NOEC and LOEC values (based on juveniles per surviving female) were 75 and 90 μg/L Cu for TO and both> 130 μg/L for T7. For Zn, survival in TO and T7 was similar. Although T7 organisms produced significantly more offspring, 14d-NOEC and LOEC values were equal to those of TO, i.e., 80 and 115μg/L, respectively. For Cu as well as for Zn effect concentrations based on 14 and 21 d exposure were similar (results from TO). It can be concluded that acute and chronic toxicity data obtained from juvenile D. magna are more sensitive or equally sensitive than obtained from 7 d old organisms. As differences are observed between the two metals extrapolations of these conclusions to other toxicants and other aquatic species cannot be made without further investigation.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors