title: Effects of herbicide on the kidneys of two Venezuelan cultured fish: Caquetaia kraussii and Colossoma macropomum (Pisces: Ciclidae and Characeae).
abstract: The use of chemical pesticides and herbicides has increased environmental pollution and affected ichthyofauna in the watersheds where they are used. We studied the effect of an herbicide, triazine, on the kidneys of two species (Caquetaia kraussii and Colossomna macropomum) widely found in Caribbean and South American rivers. In Venezuela, these species are abundant and have a high aquaculture potential because they may be cultured and reproduced in captivity. Four kidney samples from juveniles of each species exposed to the herbicide were examined by Transmission Electron Microscopy. Kidney tubule alterations included loss of plasmalemma and cell interdigitations, misshaped mitochondria, decrease in rough endoplasmic reticulum and free polysomes, and the presence of autophagic vacuoles and primary lysosomes. These alterations at the cellular level may explain fish behaviour in terms of kidney tubule pathology, and relative amounts and conditions of organelles within affected cells.
authors.affiliation: Departamento de Biologia Marina, Instituto Oceanográfico de Venezuela, Universidad de Oriente, Cumaná, Estado Sucre, 6101, Venezuela. msegnini@cantv.net
authors.forename: M I Segnini de
authors.initials: MI
authors.lastname: Bravo
authors.forename: J
authors.initials: J
authors.lastname: Medina
authors.forename: S
authors.initials: S
authors.lastname: Marcano
authors.forename: H J
authors.initials: HJ
authors.lastname: Finol
authors.forename: A
authors.initials: A
authors.lastname: Boada-Sucre
mesh_terms: D000818:Animals; D001280:Atrazine / Q000032:analysis / Q000633:toxicity*; D015415:Biomarkers / Q000032:analysis; D023681:Cichlids; D005398:Fisheries; D005399:Fishes; D006540:Herbicides / Q000032:analysis / Q000633:toxicity*; D007668:Kidney / Q000737:chemistry / Q000187:drug effects* / Q000648:ultrastructure; D007684:Kidney Tubules / Q000737:chemistry / Q000187:drug effects; D008928:Mitochondria / Q000737:chemistry / Q000187:drug effects; D014687:Venezuela; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D015415:Biomarkers; D006540:Herbicides; D014874:Water Pollutants, Chemical; D001280:Atrazine