title: Growth and histopathological effects of chronic exposition of marine pejerrey Odontesthes argentinensis larvae to petroleum water-soluble fraction (WSF).
abstract: The water-soluble fraction (WSF) of petroleum contains a mixture of polycyclic aromatic hydrocarbons, volatile hydrocarbons, phenols, and heterocyclic compounds, considered deleterious to aquatic biota. Marine "pejerrey" Odontesthes argentinensis (Teleostei: Atherinopsidae) has a great commercial importance in local fisheries and a high potential for aquaculture. The aim of this study was to evaluate the histopathological effects in "pejerrey" larvae exposed to different concentrations of petroleum WSF. The chronic toxicity test was conducted with newly hatched larvae exposed for 21 days to sublethal concentrations of WSF (2.5, 5, 10, and 20 % of WSF), plus one control. Survival and growth were significantly lower in the highest concentration. Several histopathological changes were found in the gills (e.g., hyperplasia, aneurisms, edema, and necrosis), kidney (e.g., nuclear alterations, decrease in the hematopoietic cells), and liver (e.g., hypertrophy, karyorrhexis, and karyopyknosis). An index of branchial lesion was proposed to standardize gill lesions to different pollutants.
authors.affiliation: Universidade Federal do Rio Grande, Rio Grande, Brazil.
authors.forename: Emeline Pereira
authors.initials: EP
authors.lastname: Gusmão
authors.forename: Ricardo Vieira
authors.initials: RV
authors.lastname: Rodrigues
authors.forename: Cauê Bonucci
authors.initials: CB
authors.lastname: Moreira
authors.forename: Luis Alberto
authors.initials: LA
authors.lastname: Romano
authors.forename: Luís André
authors.initials: LA
authors.lastname: Sampaio
authors.forename: Kleber Campos
authors.initials: KC
authors.lastname: Miranda-Filho
mesh_terms: D000818:Animals; D005393:Fish Diseases / Q000139:chemically induced*; D005399:Fishes / Q000254:growth & development*; D007814:Larva / Q000187:drug effects / Q000254:growth & development; D010578:Petroleum / Q000032:analysis / Q000633:toxicity*; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D010578:Petroleum; D014874:Water Pollutants, Chemical; D014867:Water