Aarhus University Seal / Aarhus Universitets segl

Martin Hansen

Blubber-depth distribution and bioaccumulation of PCBs and organochlorine pesticides in Arctic-invading killer whales

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Blubber-depth distribution and bioaccumulation of PCBs and organochlorine pesticides in Arctic-invading killer whales. / Pedro, Sara; Boba, Conor; Dietz, Rune; Sonne, Christian; Rosing-Asvid, Aqqalu; Hansen, Martin; Provatas, Anthony; McKinney, Melissa A.

I: Science of the Total Environment, Bind 601-602, Nr. December, 2017, s. 237-246.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Pedro, S, Boba, C, Dietz, R, Sonne, C, Rosing-Asvid, A, Hansen, M, Provatas, A & McKinney, MA 2017, 'Blubber-depth distribution and bioaccumulation of PCBs and organochlorine pesticides in Arctic-invading killer whales', Science of the Total Environment, bind 601-602, nr. December, s. 237-246. https://doi.org/10.1016/j.scitotenv.2017.05.193

APA

Pedro, S., Boba, C., Dietz, R., Sonne, C., Rosing-Asvid, A., Hansen, M., Provatas, A., & McKinney, M. A. (2017). Blubber-depth distribution and bioaccumulation of PCBs and organochlorine pesticides in Arctic-invading killer whales. Science of the Total Environment, 601-602(December), 237-246. https://doi.org/10.1016/j.scitotenv.2017.05.193

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MLA

Vancouver

Author

Pedro, Sara ; Boba, Conor ; Dietz, Rune ; Sonne, Christian ; Rosing-Asvid, Aqqalu ; Hansen, Martin ; Provatas, Anthony ; McKinney, Melissa A. / Blubber-depth distribution and bioaccumulation of PCBs and organochlorine pesticides in Arctic-invading killer whales. I: Science of the Total Environment. 2017 ; Bind 601-602, Nr. December. s. 237-246.

Bibtex

@article{9950599eb4f945f0bad22f0865951c89,
title = "Blubber-depth distribution and bioaccumulation of PCBs and organochlorine pesticides in Arctic-invading killer whales",
abstract = "Sightings of killerwhales (Orcinus orca) in Greenland have increased in recent years, coincidentwith sea ice loss. These killerwhales are likely from fish-feeding North Atlantic populations, but may have access tomarinemammal prey in Greenlandic waters, which could lead to increased exposures to biomagnifying contaminants. Most studies on polychlorinated biphenyl (Sigma PCB) and organochlorine (OC) contaminants in killerwhales have used biopsies which may not be representative of contaminant concentrations through the entire blubber depth. Here, we measured PCB and OC concentrations in 10 equal-length blubber sections of 18 killer whales harvested in southeast Greenland (2012-2014), and 3 stranded in the Faroe Islands (2008) and Denmark (2005). Overall, very high concentrations of Sigma PCB, Schlordanes (Sigma CHL), and Sdichlorodiphenyltrichloroethane (Sigma DDT) were found in the southeast Greenland and Denmark individuals (means of similar to 40 to 70 mg kg(-1) lipid weight). These concentrations were higher than in the Faroe Island individuals (means of similar to 2 to 5 mg kg(-1) lipid weight) and above those previously reported for other fish-feeding killerwhales in the North Atlantic, likely in part due to additional feeding onmarinemammals. On a wetweight basis, concentrations of all contaminants were significantly lower in the outermost blubber layer (0.15-0.65 cm) compared to all other layers (p <0.01), except for Sigma hexachlorocyclohexanes. However, after lipid correction, no variationwas found for Sigma CHL and Sigma chlorobenzene concentrations, while the outermost layer(s) still showed significantly lower SPCB, SDDT, Smirex, Sendosulfan, and dieldrin concentrations than one or more of the inner layers. Yet, the magnitude of these differenceswas low (up to 2-fold) suggesting that a typical biopsy may be a reasonable representation of the PCB and OC concentrations reported in killer whales, at least on a lipid weight basis. (C) 2017 Elsevier B.V. All rights reserved.",
keywords = "Stratification, Persistent organic contaminants, Orca, Biopsy, Transplacental transfer, IN-VITRO EXPOSURE, ORCINUS-ORCA, POLYCHLORINATED-BIPHENYLS, TRANSPLACENTAL TRANSFER, MARINE MAMMALS, STABLE-ISOTOPE, BALEEN WHALES, FATTY-ACIDS, CONTAMINANTS, ECOLOGY",
author = "Sara Pedro and Conor Boba and Rune Dietz and Christian Sonne and Aqqalu Rosing-Asvid and Martin Hansen and Anthony Provatas and McKinney, {Melissa A.}",
year = "2017",
doi = "10.1016/j.scitotenv.2017.05.193",
language = "English",
volume = "601-602",
pages = "237--246",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier BV",
number = "December",

}

RIS

TY - JOUR

T1 - Blubber-depth distribution and bioaccumulation of PCBs and organochlorine pesticides in Arctic-invading killer whales

AU - Pedro, Sara

AU - Boba, Conor

AU - Dietz, Rune

AU - Sonne, Christian

AU - Rosing-Asvid, Aqqalu

AU - Hansen, Martin

AU - Provatas, Anthony

AU - McKinney, Melissa A.

PY - 2017

Y1 - 2017

N2 - Sightings of killerwhales (Orcinus orca) in Greenland have increased in recent years, coincidentwith sea ice loss. These killerwhales are likely from fish-feeding North Atlantic populations, but may have access tomarinemammal prey in Greenlandic waters, which could lead to increased exposures to biomagnifying contaminants. Most studies on polychlorinated biphenyl (Sigma PCB) and organochlorine (OC) contaminants in killerwhales have used biopsies which may not be representative of contaminant concentrations through the entire blubber depth. Here, we measured PCB and OC concentrations in 10 equal-length blubber sections of 18 killer whales harvested in southeast Greenland (2012-2014), and 3 stranded in the Faroe Islands (2008) and Denmark (2005). Overall, very high concentrations of Sigma PCB, Schlordanes (Sigma CHL), and Sdichlorodiphenyltrichloroethane (Sigma DDT) were found in the southeast Greenland and Denmark individuals (means of similar to 40 to 70 mg kg(-1) lipid weight). These concentrations were higher than in the Faroe Island individuals (means of similar to 2 to 5 mg kg(-1) lipid weight) and above those previously reported for other fish-feeding killerwhales in the North Atlantic, likely in part due to additional feeding onmarinemammals. On a wetweight basis, concentrations of all contaminants were significantly lower in the outermost blubber layer (0.15-0.65 cm) compared to all other layers (p <0.01), except for Sigma hexachlorocyclohexanes. However, after lipid correction, no variationwas found for Sigma CHL and Sigma chlorobenzene concentrations, while the outermost layer(s) still showed significantly lower SPCB, SDDT, Smirex, Sendosulfan, and dieldrin concentrations than one or more of the inner layers. Yet, the magnitude of these differenceswas low (up to 2-fold) suggesting that a typical biopsy may be a reasonable representation of the PCB and OC concentrations reported in killer whales, at least on a lipid weight basis. (C) 2017 Elsevier B.V. All rights reserved.

AB - Sightings of killerwhales (Orcinus orca) in Greenland have increased in recent years, coincidentwith sea ice loss. These killerwhales are likely from fish-feeding North Atlantic populations, but may have access tomarinemammal prey in Greenlandic waters, which could lead to increased exposures to biomagnifying contaminants. Most studies on polychlorinated biphenyl (Sigma PCB) and organochlorine (OC) contaminants in killerwhales have used biopsies which may not be representative of contaminant concentrations through the entire blubber depth. Here, we measured PCB and OC concentrations in 10 equal-length blubber sections of 18 killer whales harvested in southeast Greenland (2012-2014), and 3 stranded in the Faroe Islands (2008) and Denmark (2005). Overall, very high concentrations of Sigma PCB, Schlordanes (Sigma CHL), and Sdichlorodiphenyltrichloroethane (Sigma DDT) were found in the southeast Greenland and Denmark individuals (means of similar to 40 to 70 mg kg(-1) lipid weight). These concentrations were higher than in the Faroe Island individuals (means of similar to 2 to 5 mg kg(-1) lipid weight) and above those previously reported for other fish-feeding killerwhales in the North Atlantic, likely in part due to additional feeding onmarinemammals. On a wetweight basis, concentrations of all contaminants were significantly lower in the outermost blubber layer (0.15-0.65 cm) compared to all other layers (p <0.01), except for Sigma hexachlorocyclohexanes. However, after lipid correction, no variationwas found for Sigma CHL and Sigma chlorobenzene concentrations, while the outermost layer(s) still showed significantly lower SPCB, SDDT, Smirex, Sendosulfan, and dieldrin concentrations than one or more of the inner layers. Yet, the magnitude of these differenceswas low (up to 2-fold) suggesting that a typical biopsy may be a reasonable representation of the PCB and OC concentrations reported in killer whales, at least on a lipid weight basis. (C) 2017 Elsevier B.V. All rights reserved.

KW - Stratification

KW - Persistent organic contaminants

KW - Orca

KW - Biopsy

KW - Transplacental transfer

KW - IN-VITRO EXPOSURE

KW - ORCINUS-ORCA

KW - POLYCHLORINATED-BIPHENYLS

KW - TRANSPLACENTAL TRANSFER

KW - MARINE MAMMALS

KW - STABLE-ISOTOPE

KW - BALEEN WHALES

KW - FATTY-ACIDS

KW - CONTAMINANTS

KW - ECOLOGY

U2 - 10.1016/j.scitotenv.2017.05.193

DO - 10.1016/j.scitotenv.2017.05.193

M3 - Journal article

C2 - 28554115

VL - 601-602

SP - 237

EP - 246

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

IS - December

ER -