Document Detail


Chronic histopathological effects of parathion and 2,4-D on female gonads of Chasmagnathus granulata (Decapoda, Brachyura).
MedLine Citation:
PMID:  7927078     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Female crabs of Chasmagnathus granulata, sampled at the external zone of the Rio de la Plata estuary, were chronically exposed to the pesticides parathion and 2,4-D, both of which have been extensively applied to crops in Argentina for a decade and have been detected several times above permissible levels in the estuary. After 2 months of female exposure to the pesticides during the reproductive season, the crabs' ovaries were dissected and fixed in Bouin's solution, to assess the possible effects of pesticides at the histological level. Parathion caused a significant increase in both previtellogenic and vitellogenic oocyte size, as well as a loss of the normal spherical shape of the oocytes. With 2,4-D, a significant decrease in vitellogenic oocyte size was noted, whereas the number of atretic follicles increased as a result of exposure to this herbicide. Several hypothetical mechanisms of action of these pesticides are discussed in relation to the effects observed. Although assayed concentrations were relatively high with respect to mean values detected in the mentioned estuary and its influents, persistent peaks may occur, especially in sediments. This work suggests a high potential risk from the pesticides studied to the reproductive performance of local aquatic fauna.
Authors:
E M Rodríguez; M Schuldt; L Romano
Related Documents :
11848348 - Removal of organophosphate pesticides from wastewater by supercritical carbon dioxide e...
15543728 - Annual variations of pesticide concentrations in great lakes precipitation.
12415488 - Investigation of the relation between self-reported food consumption and household chem...
19782118 - Risk assessment of mixtures of pesticides. current approaches and future strategies.
22834048 - Making choices: ethics and vegetarianism.
3558148 - Absorption, plasma flux and oxidation of l-leucine in heifers at two levels of intake.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association     Volume:  32     ISSN:  0278-6915     ISO Abbreviation:  Food Chem. Toxicol.     Publication Date:  1994 Sep 
Date Detail:
Created Date:  1994-10-25     Completed Date:  1994-10-25     Revised Date:  2006-03-13    
Medline Journal Info:
Nlm Unique ID:  8207483     Medline TA:  Food Chem Toxicol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  811-8     Citation Subset:  IM    
Affiliation:
Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, INEUCI (CONICET), Ciudad Universitaria (Pab. II), Argentina.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
2,4-Dichlorophenoxyacetic Acid / toxicity*
Animals
Brachyura / drug effects*
Female
Oocytes / drug effects,  pathology
Parathion / toxicity*
Water Pollutants, Chemical / toxicity*
Chemical
Reg. No./Substance:
0/Water Pollutants, Chemical; 56-38-2/Parathion; 94-75-7/2,4-Dichlorophenoxyacetic Acid

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


Previous Document:  Binding properties of lactic acid bacteria from 'Idly' towards food-borne mutagens.
Next Document:  Use of precision-cut liver slices for studies of unscheduled DNA synthesis.