Document Detail

Probabilistic risk assessment of cotton pyrethroids: II. Aquatic mesocosm and field studies.
MedLine Citation:
PMID:  11349869     Owner:  NLM     Status:  MEDLINE    
Results of mesocosm and field studies with cypermethrin and esfenvalerate were analyzed and interpreted to support an ecological risk assessment of cotton pyrethroids in aquatic ecosystems. A core group of seven mesocosm studies conducted on two continents over the course of a decade were examined, and additional observations from mesocosm and field studies with these and other cotton pyrethroids were also brought to bear. The results for cypermethrin and esfenvalerate were remarkably consistent. They revealed a trend in sensitivity from amphipods, isopods, midges, mayflies, copepods, and cladocerans (most sensitive) to fish, snails, oligochaetes, and rotifers (least sensitive). With few exceptions, populations affected by pyrethroids in the mesocosms recovered to normal levels before the end of the year of exposure; most populations recovered within weeks. Factors presumed responsible for population recovery included internal refuges (areas of low exposure), resistant life stages, rapid generation times, and egg deposition by adults from outside the treated systems. Indirect effects on fish (which have been hypothesized to occur when invertebrate food sources are reduced) were not observed. The lowest-observed-adverse-effect concentrations for the overall ecosystems for cypermethrin and esfenvalerate corresponded to the 54th and 41st centiles of acute toxicity endpoints (LC50s) for arthropods measured in laboratory studies with these compounds, implying that a risk characterization based on 10th centiles would be highly conservative.
J M Giddings; K R Solomon; S J Maund
Related Documents :
2211479 - Spectrofluorometric determination of histamine in fish and meat products.
16584819 - Behavioral changes in fish exposed to phytoestrogens.
2051229 - Relationship between growth and selected liver enzyme activities of individual rainbow ...
10945109 - Alkyltins in farmed fish and shellfish.
15269909 - Analysis of micronuclei in blue mussels and fish from the baltic and north seas.
19087889 - Aspects of the hormonal regulation of appetite in fish with emphasis on goldfish, atlan...
18817179 - Presence of aflatoxin m1 in raw milk at cattle farms in babol, iran.
1184809 - Iodine absorption, excretion, recycling, and tissue distribution in the dairy cow.
17985159 - Experimental support for the cost-benefit model of lizard thermoregulation: the effects...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  20     ISSN:  0730-7268     ISO Abbreviation:  Environ. Toxicol. Chem.     Publication Date:  2001 Mar 
Date Detail:
Created Date:  2001-05-14     Completed Date:  2001-06-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  660-8     Citation Subset:  IM    
Springborn Laboratories, Massachusetts 02571-1075, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Fishes / growth & development
Insecticides / administration & dosage,  toxicity*
Invertebrates / drug effects,  growth & development
Pyrethrins / administration & dosage,  toxicity*
Risk Assessment
Water Pollutants, Chemical / toxicity*
Reg. No./Substance:
0/Insecticides; 0/Nitriles; 0/Pyrethrins; 0/Water Pollutants, Chemical; 51630-58-1/fenvalerate; 52315-07-8/cypermethrin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Probabilistic risk assessment of cotton pyrethroids: I. Distributional analyses of laboratory aquati...
Next Document:  Probabilistic risk assessment of cotton pyrethroids: III. A spatial analysis of the Mississippi, USA...