Document Detail

Cypermethrin toxicity to aquatic life: bioassays for the freshwater prawn Palaemonetes argentinus.
MedLine Citation:
PMID:  16418889     Owner:  NLM     Status:  MEDLINE    
Cypermethrin (CY) effects were evaluated in freshwater prawn Palaemonetes argentinus, a common member of the aquatic fauna in the vegetated littoral of lotic and lentic environment of La Plata basin. LC50 was calculated, and oxygen uptakes together with ammonia-N excretion were related to biocide concentrations. Behavioral and growth changes were analyzed, and a unique application of CY was evaluated in P. argentinus micropopulations. LC50 and their 95% confidence limit were 0.0031 microg CY L(-1) (0.0023-0.0039) for 24 h and 0.0020 microg CY L(-1) (0.0014-0.0027) for 96 h. Oxygen uptake and ammonia-N excretion increased in the prawns kept in CY solutions. The behavioral effect was hyperactivity. Although prawns in biocide groups have null or negative growth, the intermolt period was 246% larger than in the control group. Moreover, the mortality in the second cycle was 100%. A unique application of pyrethoid provoked high mortality after 50 days. The low concentrations of this biocide affected the survival and altered the prawn metabolic activity, behavioral and ecdysis cycle. These results suggest that juveniles of P. argentinus are much more sensitive to CY pollution than other crustaceans, fish, and tadpoles.
P Collins; S Cappello
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-01-13
Journal Detail:
Title:  Archives of environmental contamination and toxicology     Volume:  51     ISSN:  0090-4341     ISO Abbreviation:  Arch. Environ. Contam. Toxicol.     Publication Date:  2006 Jul 
Date Detail:
Created Date:  2006-04-24     Completed Date:  2006-07-07     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0357245     Medline TA:  Arch Environ Contam Toxicol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  79-85     Citation Subset:  IM    
Instituto Nacional de Limnología, José Maciá 1933, 3016, Santo Tomé, Santa Fe, Argentina.
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MeSH Terms
Ammonia / metabolism
Behavior, Animal / drug effects
Insecticides / toxicity*
Lethal Dose 50
Nitrogen / metabolism
Oxygen / metabolism
Palaemonidae / drug effects*,  growth & development,  physiology
Pyrethrins / toxicity*
Water Pollutants, Chemical / toxicity
Reg. No./Substance:
0/Insecticides; 0/Pyrethrins; 0/Water Pollutants, Chemical; 52315-07-8/cypermethrin; 7664-41-7/Ammonia; 7727-37-9/Nitrogen; 7782-44-7/Oxygen

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

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