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Effects of methyl parathion exposure on development and reproduction in the viviparous fish Girardinichthys multiradiatus
10.1002/tox.20414.abs
Methyl parathion (MeP), an insecticide commonly used in Mexico, has been detected in water bodies adjacent to agricultural crops and is accumulated in the tissue of the amarillo (Girardinichthys multiradiatus), a viviparous fish unique to Central Mexico. Evidence of MeP accumulation in a G. multiradiatus population prompted assessment of the consequences of exposure to MeP during the gestation period and adult life. We exposed adult fish to MeP in the diet at concentrations ranging from 0.001 to 0.165 μg/g dry weight of food. Fish accumulated MeP at concentrations from 0.21 to 5.87 μg/g of fish and exhibited a significant reduction in weight and growth rate. We also evaluated the effects on broods of pregnant females exposed to 0.005, 0.01, and 0.1 μg/g dry weight of food. Although these pregnant females were not affected, their offspring showed an increase in spinal cord malformation and a reduction in survival to adulthood. Finally, we sampled seven localities inhabited by G. multiradiatus; this revealed the presence of MeP in two water bodies at concentrations of 0.0036 and 0.037 μg/mL respectively. Our results suggest that low MeP concentrations affect immature fish with possible consequences later in life. © 2008 Wiley Periodicals, Inc. Environ Toxicol, 2009.
Effects of methyl parathion exposure on development and reproduction in the viviparous fish Girardinichthys multiradiatus
10.1002/tox.20414.abs
Methyl parathion (MeP), an insecticide commonly used in Mexico, has been detected in water bodies adjacent to agricultural crops and is accumulated in the tissue of the amarillo (Girardinichthys multiradiatus), a viviparous fish unique to Central Mexico. Evidence of MeP accumulation in a G. multiradiatus population prompted assessment of the consequences of exposure to MeP during the gestation period and adult life. We exposed adult fish to MeP in the diet at concentrations ranging from 0.001 to 0.165 μg/g dry weight of food. Fish accumulated MeP at concentrations from 0.21 to 5.87 μg/g of fish and exhibited a significant reduction in weight and growth rate. We also evaluated the effects on broods of pregnant females exposed to 0.005, 0.01, and 0.1 μg/g dry weight of food. Although these pregnant females were not affected, their offspring showed an increase in spinal cord malformation and a reduction in survival to adulthood. Finally, we sampled seven localities inhabited by G. multiradiatus; this revealed the presence of MeP in two water bodies at concentrations of 0.0036 and 0.037 μg/mL respectively. Our results suggest that low MeP concentrations affect immature fish with possible consequences later in life. © 2008 Wiley Periodicals, Inc. Environ Toxicol, 2009.
Effects of methyl parathion exposure on development and reproduction in the viviparous fish Girardinichthys multiradiatus
Arellano‐Aguilar, Omar (author) / Macías Garcia, Constantino (author)
Environmental Toxicology ; 24 ; 178-186
2009-04-01
9 pages
Article (Journal)
Electronic Resource
English
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