title: Pesticide contamination of water alters the metabolism of juvenile silver catfish, Rhamdia quelen.
abstract: We investigated how pesticide contamination of water affects the metabolism of the silver catfish, Rhamdia quelen, by studying fish maintained at two sites with low and high anthropic activity (Lino Creek, southern Brazil). Several pesticides were found at both stream sites. After 30 days plasma glucose levels were higher in fish exposed to water in the low anthropic activity site than those exposed to water in the high anthropic activity site. Plasma K+ levels, however, were lower after exposure to low anthropic water than after exposure to high anthropic water. Moreover, values of hepatic glycogen, muscle lactate and protein were higher, but glycogen and protein of the kidney were lower in fish exposed to water at the high anthropic activity site. Our results show that these fish can be used as pesticide toxicity indicators in streams near agricultural fields.
authors.affiliation: Departamento de Fisiologia e Farmacologia, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
authors.forename: Alexssandro G
authors.initials: AG
authors.lastname: Becker
authors.forename: Bibiana S
authors.initials: BS
authors.lastname: Moraes
authors.forename: Charlene C
authors.initials: CC
authors.lastname: Menezes
authors.forename: Vania L
authors.initials: VL
authors.lastname: Loro
authors.forename: Danilo R
authors.initials: DR
authors.lastname: Santos
authors.forename: José M
authors.initials: JM
authors.lastname: Reichert
authors.forename: Bernardo
authors.initials: B
authors.lastname: Baldisserotto
mesh_terms: D000641:Ammonia / Q000378:metabolism; D000818:Animals; D001786:Blood Glucose / Q000187:drug effects; D002397:Catfishes / Q000378:metabolism*; D004784:Environmental Monitoring; D029941:Fish Proteins / Q000378:metabolism; D005618:Fresh Water / Q000737:chemistry*; D006003:Glycogen / Q000378:metabolism; D007668:Kidney / Q000378:metabolism; D019344:Lactic Acid / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D009132:Muscles / Q000378:metabolism; D010575:Pesticides / Q000032:analysis / Q000633:toxicity*; D011188:Potassium / Q000097:blood; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity*
chemical_list: D001786:Blood Glucose; D029941:Fish Proteins; D010575:Pesticides; D014874:Water Pollutants, Chemical; D019344:Lactic Acid; D000641:Ammonia; D006003:Glycogen; D011188:Potassium