(Table 1) Organohalogen contaminants in adipose tissue of captive sledge dogs (Canis familiaris) fed with whale blubber or pork fat


Studies on the fate of organohalogen contaminants (OHCs) in wild top predator mammals in the Arctic have often been a challenge due to important knowledge deficiencies in the life history of the sampled animals. The present study investigated the influence of age, dietary and trans-generational factors on the fate of major lipophilic chlorinated and brominated OHCs in adipose tissue of a potential surrogate captive species for the polar bear (Ursus maritimus), the sledge dog (Canis familiaris) in West Greenland. Adult female sledge dogs (P) and their sexually-mature (F1) and/or pre-weaning pups (F1-MLK) were divided into an exposed group (EXP) fed blubber from a Greenland minke whale (Balaenoptera acutorostrata) and a control group (CON) given commercially available pork fat. Large dietary treatment-related differences in summed and individual congener/compound adipose tissue concentrations of polybrominated diphenyl ethers (PBDEs), hexachlorobenzene (HCB), chlordanes (CHLs) and polychlorinated biphenyls (PCBs) were found between the EXP and CON groups for all the sledge dog cohorts. However, among the F1-MLK, F1 and P dogs in both of the EXP and CON groups, little or no difference existed in PBDE, HCB, CHL and PCB concentrations, suggesting higher state of equilibrium in adipose tissue concentrations from a very early stage of life. In contrast, the distribution pattern (proportions to the summed concentrations) of OHC classes, and the major congeners/ compounds constituting those classes, varied on a dietary group- and/or cohort-dependent manner. The present captive sledge dog study demonstrated the importance of the confounding effects of diet composition, mother-pup association (maternal transfer), reproductive status (nursing), and to a lesser extent age in the fate of OHCs in adipose tissue of a large top carnivore mammal.

SumPBDE = sum of BDE17,25,28,47,49,54,66,75,77,85,99,100,116,119,138,139,140,153,154,155,171,180,181,183,184,190,191,196,197,201,202,203,206,207,208 and 209.SumCHL = sum ofheptachlor epoxide, oxychlordane, trans-chlordane, cis-chlordane, trans-nonachlor and cis-nonachlor.SumPCB = sum of CB16/32,17,18,22,31/28,33/20,42,44,47/48,52,56/60,64/41,66,70/76,74,85,87,92,95,97,99,101/90,105,110,114,118,128,130,137,138,141,146,149,151,153,156,157,158,170/190,171,172,174,176,177,178,179,180,183,187,189,194,195,196/203,199,200,202,206,207 and 208.Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150

Supplement to: Verreault, Jonathan; Letcher, Robert J; Sonne, Christian; Dietz, Rune (2009): Dietary, age and trans-generational effects on the fate of organohalogen contaminants in captive sledge dogs in Greenland. Environment International, 35(1), 56-62

DOI https://doi.org/10.1594/PANGAEA.842558
Related Identifier https://doi.org/10.1016/j.envint.2008.07.022
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.842558
Creator Verreault, Jonathan; Letcher, Robert J; Sonne, Christian ORCID logo; Dietz, Rune
Publisher PANGAEA
Publication Year 2009
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 153 data points
Discipline Earth System Research
Spatial Coverage (-52.793 LON, 68.719 LAT); Disko Bay, Greenland