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No. de sistema: 000027257

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 110425m20109999xx^^r^p^^^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
044 _ _ a| xx
245 0 0 a| Variation in plasma cholinesterase activity in the clay-colored robin (Turdus grayi) in relation to time of day, season, and diazinon exposure
520 1 _ a| Cholinesterase (ChE) activity in birds is subject to interspecific and intraspecific species variations. Factors that influence enzyme activity have to be taken into account in order to obtain an accurate estimation of cholinesterase inhibition due to pesticide exposure in wild birds. This study evaluates variation of plasma cholinesterase activity in clay-colored robin (Turdus grayi) in relation to time of day, season, and exposure to diazinon. Other variables that can affect cholinesterase activity such as weight are also taken into account. The birds were marked, weighed and sexed using the cloacal technique. One dose of commercial diazinon mixed with papaya was fed to each bird at concentrations of 0.0, 0.5, 1.5 and 3.0 mg/kg ai. The results showed differences in ChE activity between seasons (t = -3.07, P\0.05). Also, diurnal plasma cholinesterase variations were observed (20% in 2 h). The highest inhibition values were 73% for birds dosed with 1.5 mg/kg ai. Our study provides field and laboratory data on variation of ChE activity in a tropical bird species. Knowledge of the variation of ChE in the clay-colored robin will enable us to use this species as an indicator of exposure to ChE inhibiting pesticides in tropical agroecosystems.
650 _ 4 a| Colinesterasa
650 _ 4 a| Turdus grayi
650 _ 4 a| Inhibidores de la colinesterasa
650 _ 4 a| Insecticidas organofosforados
651 _ 4 a| Hunucmá (Yucatán, México)
700 1 _ a| Cobos Gasca, Víctor Manuel
700 1 _ a| Mora, Víctor M.
e| coaut.
700 1 _ a| Escalona Segura, Griselda
c| Doctora
e| coaut.
700 1 _ a| Calmé, Sophie
c| Doctora
e| coaut.
700 1 _ a| Jiménez, Juan
e| coaut.
773 0 _
t| Ecotoxicology
g| Vol. 19, no. 2 (Feb. 2010), p. 267-272
902 _ _ a| GOG/Brenda
904 _ _ a| Abril 2011
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| Biblioelectrónica
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Variation in plasma cholinesterase activity in the clay-colored robin (Turdus grayi) in relation to time of day, season, and diazinon exposure
Cobos Gasca, Víctor Manuel (autor)
Mora, Víctor M. (autor)
Escalona Segura, Griselda (autor)
Calmé, Sophie (autor)
Jiménez, Juan (autor)
Contenido en: Ecotoxicology. Vol. 19, no. 2 (Feb. 2010), p. 267-272.
No. de sistema: 27257
Tipo: Artículo
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Inglés

"Cholinesterase (ChE) activity in birds is subject to interspecific and intraspecific species variations. Factors that influence enzyme activity have to be taken into account in order to obtain an accurate estimation of cholinesterase inhibition due to pesticide exposure in wild birds. This study evaluates variation of plasma cholinesterase activity in clay-colored robin (Turdus grayi) in relation to time of day, season, and exposure to diazinon. Other variables that can affect cholinesterase activity such as weight are also taken into account. The birds were marked, weighed and sexed using the cloacal technique. One dose of commercial diazinon mixed with papaya was fed to each bird at concentrations of 0.0, 0.5, 1.5 and 3.0 mg/kg ai. The results showed differences in ChE activity between seasons (t = -3.07, P\0.05). Also, diurnal plasma cholinesterase variations were observed (20% in 2 h). The highest inhibition values were 73% for birds dosed with 1.5 mg/kg ai. Our study provides field and laboratory data on variation of ChE activity in a tropical bird species. Knowledge of the variation of ChE in the clay-colored robin will enable us to use this species as an indicator of exposure to ChE inhibiting pesticides in tropical agroecosystems."