Organobromine, Organochlorine and Metabolically-Derived Contaminants in Norwegian Arctic Glaucous Gulls: Associations with Whole Body Constituents
نویسندگان
چکیده
Introduction. Monitoring of organohalogens in the glaucous gull (Larus hyperboreus) has been given high priority in Svalbard (Norwegian Arctic). Glaucous gulls are distributed widely in the Arctic and are an important avian scavenger-predator in the marine food web. Thus far among circumpolar arctic seabirds, glaucous gulls from Svalbard are reported to accumulate some of the highest concentrations of organohalogen contaminants. These include the metabolically-derived or -associated polychlorinated biphenyls (PCBs) (e.g., methylsulfonyl (MeSO2)and hydroxyl (OH)-PCBs) (Verreault et al., 2005a), and brominated flame retardants (e.g., polybrominated diphenyl ethers (PBDEs), polybrominated biphenyls (PBBs), hexabromocyclododecane (HBCD)) and PBDE metabolites and/or naturally-occurring compounds with similar structures (MeOand OH-PBDEs) (Verreault et al., 2005b).
منابع مشابه
Changes in prolactin in a highly organohalogen contaminated Arctic top predator seabird, the glaucous gull.
The factors influencing prolactin (PRL) variation in birds and in wildlife in general have rarely been investigated with respect to the physiological impacts of exposure to environmental contaminants. We investigated the associations between circulating baseline PRL levels and concentrations of eight persistent organohalogen contaminant (OHC) classes (i.e., major organochlorines and brominated ...
متن کاملOrganohalogen contamination in breeding glaucous gulls from the Norwegian Arctic: associations with basal metabolism and circulating thyroid hormones.
Exposure to organohalogens in endotherms has been suggested to impose chemically induced stress by affecting functions related to maintenance energy requirements. Effects on basal metabolic rate (BMR) have been suggested to be, in part, mediated through interactions with the thyroid hormones (THs). We investigated the relationships between plasma concentrations of major organochlorines, PBDEs, ...
متن کاملEffects of organochlorine contaminants on thyroid hormone levels in Arctic breeding glaucous gulls, Larus hyperboreus.
Studies on glaucous gulls (Larus hyperboreus) breeding in the Barents Sea have reported that high blood levels of halogenated organic contaminants in this species might cause reproductive, behavioral, and developmental stress. However, potential endocrine system modulation caused by contaminant exposure has yet not been reported in this Arctic apical predator. In this present study we aimed to ...
متن کاملThe Svalbard glaucous gull as bioindicator species in the European arctic: insight from 35 years of contaminants research.
Biomonitoring survey conducted with glaucous gulls from Svalbard have demonstrated that this top-predator-scavenger species accumulates a wide array of chemicals of environmental concern, including organohalogens, trace elements, organometals, and several non-halogenated and non-metallic-compounds. Among these contaminants are those subjected to global bans or restrictions in North America and ...
متن کاملImmune function and organochlorine pollutants in Arctic breeding glaucous gulls.
Organochlorine contaminants (OCs) are known to affect the immune systems of wildlife, and in this study we assessed the relationship between blood concentration of different OCs and measurements relevant to immune status and function in arctic breeding glaucous gulls (Larus hyperboreus). In 1997 and 2001, we counted white blood cells (heterophils and lymphocytes) from blood smears, and in 2000 ...
متن کامل