title: Effects of Louisiana crude oil on the sheepshead minnow (Cyprinodon variegatus) during a life-cycle exposure to laboratory oiled sediment.
abstract: Determining the long-term effects of crude oil exposure is critical for ascertaining population-level ecological risks of spill events. A 19-week complete life-cycle experiment was conducted with the estuarine sheepshead minnow (Cyprinodon variegatus) exposed to reference (uncontaminated) sediment spiked with laboratory weathered South Louisiana crude (SLC) oil at five concentrations as well as one unspiked sediment control and one seawater (no sediment) control. Newly hatched larvae were exposed to the oiled sediments at measured concentrations of < 1 (sediment control), 50, 103, 193, 347, and 711 mg total polyaromatic hydrocarbons (tPAH)/kg dry sediment. Juveniles were exposed through the reproductively active adult phase at measured concentrations of <1 (sediment control), 52, 109, 199, 358, and 751 mg tPAH/kg sediment. Throughout the exposure, fish were assessed for growth, survival, and reproduction. Resulting F1 embryos were then collected, incubated, and hatched in clean water to determine if parental full life-cycle exposure to oiled sediment produced trans-generational effects. Larvae experienced significantly reduced standard length (5-13% reduction) and wet weight (13-35% reduction) at concentrations at and above 50 and 103 mg tPAH/kg sediment, respectively. At 92 and 132 days post hatch (dph), standard length was reduced (7-13% reduction) at 199 and 109 mg tPAH/kg dry sediment, respectively, and wet weight for both time periods was reduced at concentrations at and above 109 mg tPAH/kg dry sediment (21-38% reduction). A significant reduction (51-65%) in F0 fecundity occurred at the two highest test concentrations, but no difference was observed in F1 embryo survival. This study is the first to report the effects of chronic laboratory exposure to oiled sediment, and will assist the development of population models for evaluating risk to benthic spawning fish species exposed to oiled sediments. © 2015 Wiley Periodicals, Inc. Environ Toxicol 31: 1627-1639, 2016.
authors.affiliation: Gulf Ecology Division, US Environmental Protection Agency, 1 Sabine Island Drive, Gulf Breeze, Florida, 32561. Raimondo.sandy@epa.gov.
authors.forename: Sandy
authors.initials: S
authors.lastname: Raimondo
authors.affiliation: Gulf Ecology Division, US Environmental Protection Agency, 1 Sabine Island Drive, Gulf Breeze, Florida, 32561.
authors.forename: Becky L
authors.initials: BL
authors.lastname: Hemmer
authors.affiliation: Gulf Ecology Division, US Environmental Protection Agency, 1 Sabine Island Drive, Gulf Breeze, Florida, 32561.
authors.forename: Crystal R
authors.initials: CR
authors.lastname: Lilavois
authors.affiliation: Gulf Ecology Division, US Environmental Protection Agency, 1 Sabine Island Drive, Gulf Breeze, Florida, 32561.
authors.forename: Julie
authors.initials: J
authors.lastname: Krzykwa
authors.affiliation: Gulf Ecology Division, US Environmental Protection Agency, 1 Sabine Island Drive, Gulf Breeze, Florida, 32561.
authors.forename: Alex
authors.initials: A
authors.lastname: Almario
authors.affiliation: Gulf Ecology Division, US Environmental Protection Agency, 1 Sabine Island Drive, Gulf Breeze, Florida, 32561.
authors.forename: Jill A
authors.initials: JA
authors.lastname: Awkerman
authors.affiliation: Gulf Ecology Division, US Environmental Protection Agency, 1 Sabine Island Drive, Gulf Breeze, Florida, 32561.
authors.forename: Mace G
authors.initials: MG
authors.lastname: Barron
mesh_terms: D000818:Animals; D003530:Cyprinidae / Q000502:physiology*; D019015:Geologic Sediments; D007814:Larva / Q000187:drug effects; D008018:Life Cycle Stages; D008145:Louisiana; D010578:Petroleum / Q000633:toxicity*; D059392:Petroleum Pollution; D012098:Reproduction / Q000187:drug effects; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D010578:Petroleum; D014874:Water Pollutants, Chemical
keywords: chronic toxicity; fish; growth effects; oil; polycyclic aromatic hydrocarbons; reproductive effects; sediment exposure