title: Polycyclic aromatic hydrocarbons in blood related to lower body mass in common loons.
abstract: We captured 93 wintering adult and subadult Common Loons (Gavia immer) in coastal Louisiana from 2011 to 2015 following the Deepwater Horizon oil spill. We tested blood samples for exposure to polycyclic aromatic hydrocarbons (PAHs) and measured physiological variables including hematocrit, hemoglobin and total blood protein. PAH concentrations in loon blood differed from year to year and by age class. High PAH concentrations were significantly related to lower body masses in both adult and subadult birds and higher serum protein levels in adults only. PAH concentrations had marginal relations with both hematocrit and hemoglobin levels. The types of PAHs detected also underwent a major shift over time. The PAHs detected in 2011, 2012, and 2015 were primarily low molecular weight (three carbon rings); however, in 2013, most detected PAHs were high molecular weight (four carbon rings). It is unclear what events led to the increase in PAH concentrations and the shift in type of PAHs over time.
authors.affiliation: Biodiversity Research Institute, 276 Canco Road, Portland, ME 04103, United States. Electronic address: jim.paruk@briloon.org.
authors.forename: James D
authors.initials: JD
authors.lastname: Paruk
authors.affiliation: Biodiversity Research Institute, 276 Canco Road, Portland, ME 04103, United States. Electronic address: evan.adams@briloon.org.
authors.forename: Evan M
authors.initials: EM
authors.lastname: Adams
authors.affiliation: Biodiversity Research Institute, 276 Canco Road, Portland, ME 04103, United States. Electronic address: hruherkoch@Alaska.edu.
authors.forename: Hannah
authors.initials: H
authors.lastname: Uher-Koch
authors.affiliation: Biodiversity Research Institute, 276 Canco Road, Portland, ME 04103, United States. Electronic address: kristin.kovach@briloon.org.
authors.forename: Kristin A
authors.initials: KA
authors.lastname: Kovach
authors.affiliation: Biodiversity Research Institute, 276 Canco Road, Portland, ME 04103, United States. Electronic address: adeliepenguin1234@gmail.com.
authors.forename: Darwin
authors.initials: D
authors.lastname: Long
authors.affiliation: University of Connecticut, 3107 Horsebarn Hill Road, Storrs, CT 06269, United States. Electronic address: Christopher.perkins@uconn.edu.
authors.forename: Christopher
authors.initials: C
authors.lastname: Perkins
authors.affiliation: Biodiversity Research Institute, 276 Canco Road, Portland, ME 04103, United States. Electronic address: nina.schoch@briloon.org.
authors.forename: Nina
authors.initials: N
authors.lastname: Schoch
authors.affiliation: Biodiversity Research Institute, 276 Canco Road, Portland, ME 04103, United States. Electronic address: david.evers@briloon.org.
authors.forename: David C
authors.initials: DC
authors.lastname: Evers
mesh_terms: D000367:Age Factors; D000818:Animals; D001717:Birds; D001837:Body Weights and Measures; D004784:Environmental Monitoring; D060851:Gulf of America; D008145:Louisiana; D059392:Petroleum Pollution; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D012621:Seasons; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical
keywords: Body mass; Common loon; Deepwater Horizon oil spill; Gavia immer; Hematocrit; Polycyclic aromatic hydrocarbons