TY - JOUR
T1 - Efecto tóxico del DDT, clordano y agua de la presa Ignacio Ramírez (México), sobre Daphnia magna (Crustacea: Daphnidae)
AU - Martínez-Tabche, Laura
AU - Solís, Martha Romero
AU - López, Eugenia López
AU - Martínez, Marcela Galar
PY - 1999/12
Y1 - 1999/12
N2 - Chlorodiphenylnitrichloroethane (DDT) and chlordane (CLO) are currently used in Mexico to control malaria and termites. From 1990 to 1996 a total of 27 ton of DDT and 508 of CLO were imported. We establish a methodology to determine their environmental impact in a Mexican dam (Ignacio Ramírez). The toxic effect of DDT and CLO were evaluated on the o-demethylase (OD) and acethycholinesterase activities (AchA) of the cladoceran Daphnia magna exposed to different concentrations of the insecticides solved in water from three sites. Their effect on the AchA and OD activities, and so the CL50 were used as exposure bioindicators to determine the more polluted sites. The physicochemical characteristics of water and the biodiversity of the dam test sites were considered. The station near the floodgate has toxicity potential because enzimatic activities were modified. We suggest the use of AchA and OD activities measure in the cladoceran to evaluate the toxicity of a water body polluted by organochlorate insecticides.
AB - Chlorodiphenylnitrichloroethane (DDT) and chlordane (CLO) are currently used in Mexico to control malaria and termites. From 1990 to 1996 a total of 27 ton of DDT and 508 of CLO were imported. We establish a methodology to determine their environmental impact in a Mexican dam (Ignacio Ramírez). The toxic effect of DDT and CLO were evaluated on the o-demethylase (OD) and acethycholinesterase activities (AchA) of the cladoceran Daphnia magna exposed to different concentrations of the insecticides solved in water from three sites. Their effect on the AchA and OD activities, and so the CL50 were used as exposure bioindicators to determine the more polluted sites. The physicochemical characteristics of water and the biodiversity of the dam test sites were considered. The station near the floodgate has toxicity potential because enzimatic activities were modified. We suggest the use of AchA and OD activities measure in the cladoceran to evaluate the toxicity of a water body polluted by organochlorate insecticides.
KW - Acetylcholinesterase
KW - Daphnia magna
KW - Pesticides
KW - Reservoir
KW - Toxicity
KW - o-demethylase
UR - http://www.scopus.com/inward/record.url?scp=0033288254&partnerID=8YFLogxK
M3 - Artículo
SN - 0034-7744
VL - 47
SP - 681
EP - 690
JO - Revista de Biologia Tropical
JF - Revista de Biologia Tropical
IS - 4
ER -