Organochlorine pesticides in lacustrine sediments and tilapias of Metztitlan, Hidalgo, Mexico

The organochlorine pesticides (OP) are very stable molecules, due to this stability; they are very resistant in the environment and highly related to fat tissues with a wide diffusion property and an average time life higher then 10 years. We studied sediments (November 2001, April and June 2002) an...

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Bibliographic Details
Published inRevista de biología tropical Vol. 56; no. 3; pp. 1381 - 1390
Main Authors Fernández-Bringas, Laura M, Ponce-Vélez, Guadalupe, Calva, Laura G, Salgado-Ugarte, Isaías Hazamamberth, Botello, Alfonso V, Díaz González, Gilberto
Format Journal Article
LanguageEnglish
Published Costa Rica Universidad de Costa Rica 01.09.2008
Subjects
Animals
Biodiversity Conservation
Biology
carbono orgánico particulado
Environmental Monitoring - methods
Fresh Water - chemistry
Geologic Sediments - chemistry
Hydrocarbons, Chlorinated - analysis
Metztitlán
Mexico
Muscles - chemistry
México
Organochlorine pesticides
particulate organic carbon
Pesticides - analysis
Plaguicidas organoclorados
Seasons
sediment
sedimentos
Tilapia
tilapia (Oreochromis spp)
Water Pollutants, Chemical - analysis
Mexico
Organochlorine pesticides
carbono orgánico particulado
México
sedimentos
sediment
particulate organic carbon
Plaguicidas organoclorados
Metztitlán
tilapia (Oreochromis spp)
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Summary:The organochlorine pesticides (OP) are very stable molecules, due to this stability; they are very resistant in the environment and highly related to fat tissues with a wide diffusion property and an average time life higher then 10 years. We studied sediments (November 2001, April and June 2002) and organisms collected in April and July (2002) from the lacustric zone of Metzitlán, Hidalgo, Mexico. The analysis was performed according to UNEP/IAEA (1982) (sediments) and UNEP/FAO/IOC/IAEA (1986) (organisms) methods. Three chemical families of organochlorine pesticides were identified and analyzed to determine posible toxicological risk. The principal organochlorine compounds found in sediments were gamma-HCH, delta-HCH, p,p'-DDT and the endosulfan sulfate; these xenobiotics come from agriculture lands near the river and lake, used intensively, and most probably carried by the rain and rain flows into the main water body. In the tilapias tissue, p,p'-DDD y delta-HCH were detected. The average concentrations of organochlorine pesticides in sediments were within the internacional limits for freshwater benthonic fauna, although lindane (gamma-HCH) was near the limit. The fish were above the criteria established in the local legislation (NOM-027-SSA1-1993 y NOM-028-SSA1-1993).
ISSN:0034-7744
2215-2075