title: Pesticide residue analyses and biomarker responses of native Costa Rican fish of the Poeciliidae and Cichlidae families to assess environmental impacts of pesticides in Palo Verde National Park.
abstract: Pesticide chemical residues in water samples and biomarker responses in transplanted fish were used to monitor environmental hazards of pesticides in Palo Verde National Park (Costa Rica). The Costarican fish, Parachromis dovii (Ciclhidae) and Poecilia gillii (Poecillidae), were selected as sentinel species. Contaminant analyses detected up to 15 different pesticide residues in water with hexachlobenzene (2261 ng l(-1)), phorate (473 ng l(-1)), epoxiconazole (314) and bromacil (117 ng l(-1)) being the compounds found in higher concentrations. Biomarker responses evidenced impacts on cholinesterase activities in transplanted fish at Barbudal site probably due to the presence of organophosphate insecticides such as phorate. High enzyme activities of glutathione S-transferase and catalase and elevated levels of lipid peroxides were also observed at a site impacted by rice fields (Cabuyo); those effects could be associated with the presence of hexachloro benzene and triazole fungicides. In general, P. dovii biomarkers were affected to a greater extent than those of P. gillii in fish transplanted to sites associated with agriculture, which suggests the former species is a good candidate for future surveys.
authors.affiliation: Central American Institute for Studies on Toxic Substances/Instituto Regional de Estudios en Sustancias Tóxicas (IRET), Universidad Nacional, Campus Omar Dengo, 3000, Heredia, Costa Rica. fmena@una.ac.cr
authors.forename: F
authors.initials: F
authors.lastname: Mena
authors.affiliation: Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Fernández San Juan
authors.affiliation: Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain.
authors.forename: B
authors.initials: B
authors.lastname: Campos
authors.affiliation: Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Sánchez-Avila
authors.affiliation: Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Faria
authors.affiliation: Central American Institute for Studies on Toxic Substances/Instituto Regional de Estudios en Sustancias Tóxicas (IRET), Universidad Nacional, Campus Omar Dengo, 3000, Heredia, Costa Rica.
authors.forename: M
authors.initials: M
authors.lastname: Pinnock
authors.affiliation: Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain.
authors.forename: E
authors.initials: E
authors.lastname: de la Cruz
authors.affiliation: Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Lacorte
authors.affiliation: Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain.
authors.forename: A M V M
authors.initials: AM
authors.lastname: Soares
authors.affiliation: Department of Environmental Chemistry, IDAEA-CSIC, Jordi Girona 18, 08034 Barcelona, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Barata
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000032:analysis*; D023681:Cichlids; D003364:Costa Rica; D004784:Environmental Monitoring; D008401:Gas Chromatography-Mass Spectrometry; D010573:Pesticide Residues / Q000009:adverse effects* / Q000032:analysis; D011036:Poecilia; D011897:Random Allocation; D014874:Water Pollutants, Chemical / Q000032:analysis
chemical_list: D015415:Biomarkers; D010573:Pesticide Residues; D014874:Water Pollutants, Chemical