Document Detail

The influence of nonylphenol on life-history of the earthworm Dendrobaena octaedra Savigny: linking effects from the individual- to the population-level.
MedLine Citation:
PMID:  15157569     Owner:  NLM     Status:  MEDLINE    
We conducted a study to look at the effects of nonylphenol (NP) on the life-history of the parthenogenetic earthworm, Dendrobaena octaedra. During a 196-day study, we observed that the growth rate of juveniles and the percentage of worms producing cocoons were the only traits significantly affected by NP, while the total number of cocoons produced was marginally affected. Despite some fairly large changes in the average values of individual life-history traits caused by NP, the effects were difficult to detect statistically due to large interindividual variability. A declining trend was observed for population growth rate (lambda) with increasing NP concentration, but the decline was not statistically significant. The percent reduction in lambda was less than the percent reduction in the most sensitive life-history trait (fecundity). An elasticity analysis showed that lambda was more sensitive to changes in survival than to changes in reproductive traits. However, neither juvenile nor adult survival were affected by NP, and decomposition analysis showed that the minor changes in lambda were mainly caused by effects of NP on time to first reproduction, time between reproduction events and fecundity. The present study suggests that extrapolation from laboratory studies to population effects in the field may be greatly enhanced by combining ecotoxicological and demographic methods.
T H Widarto; M Holmstrup; V E Forbes
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Ecotoxicology and environmental safety     Volume:  58     ISSN:  0147-6513     ISO Abbreviation:  Ecotoxicol. Environ. Saf.     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-05-25     Completed Date:  2004-10-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7805381     Medline TA:  Ecotoxicol Environ Saf     Country:  United States    
Other Details:
Languages:  eng     Pagination:  147-59     Citation Subset:  IM    
Department of Life Sciences and Chemistry, Roskilde University, Universitetsvej 1, PO Box 260, Roskilde DK-4000, Denmark.
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MeSH Terms
Detergents / chemistry
Estrogens / analysis,  toxicity
Ethylene Glycols / chemistry
Life Cycle Stages / drug effects
Oligochaeta / drug effects*,  growth & development,  physiology
Phenols / analysis,  toxicity*
Population Dynamics
Reproduction / drug effects
Soil / analysis
Soil Pollutants / toxicity*
Toxicity Tests
Reg. No./Substance:
0/Detergents; 0/Estrogens; 0/Ethylene Glycols; 0/Phenols; 0/Soil; 0/Soil Pollutants; 25154-52-3/nonylphenol; 27986-36-3/terics

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