Polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), polychlorinated biphenyls (PCBs), and polybrominated diphenyl ethers (PBDEs) in Finnish semi-domesticated reindeer (Rangifer tarandus tarandus L.).
To explore the concentrations and dynamics of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in Finnish semi-domesticated reindeer (Rangifer tarandus tarandus L.) the reindeer milk and tissue samples were collected from the sub-arctic northern Finland. Reindeer milk's PCB sum (1.20 ng g(-1) wet weight) and PCDD/F sum (0.70 pg g(-1) ww) in autumn were higher than in summer (PCBs 0.50 ng g(-1) ww and PCDD/Fs 0.20 pg g(-1) ww). The mean fat content in autumn milk (26%) was significantly higher than in summer (10%). Concentrations in reindeer milk were generally far below 50% of that in adult reindeer body burden. However, the bioaccumulation factors were multiple in milk/reindeer calf ratio and that aroused the question of other important exposure routes than lactation. The muscle and liver of reindeer calves had higher PCDD/F and PCB concentrations than adult animals that possibly indicate the significance of transfer of these compounds from dam to calf through lactation and placenta. However, PBDE concentrations were higher in adult reindeer, especially in liver. In addition, reindeer liver seems to have a special feature to collect highly toxic PCDD/Fs, although the PCB sum concentrations (range from 0.33 to 1.69 ng g(-1) wet weight) were clearly higher than the sums of PCDD/Fs (range from 3.78 to 39.2 pg g(-1) ww). Stillborn reindeer calves represented individuals who had got their PCDD/F, PCB and PBDE load only via the placenta. Concentrations in muscle and brown adipose tissue samples did not indicate dependency on fat content. Obviously effective placental transfer of PCBs and PBDEs from reindeer dam to foetus was seen in this study.
University of Oulu, Department of Biology, P.O. Box 3000, 90014 Oulu, Finland. anniina.suutari@oulu.fi
Anniina
A
Suutari
Päivi
P
Ruokojärvi
Hannu
H
Kiviranta
Matti
M
Verta
Markku
M
Korhonen
Mauri
M
Nieminen
Sauli
S
Laaksonen
D002001:Adipose Tissue, Brown / Q000378:metabolism; D000818:Animals; D001572:Benzofurans / Q000378:metabolism*; D000072338:Dibenzofurans, Polychlorinated; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000378:metabolism*; D062665:Epidemiological Monitoring; D005260:Female; D005387:Finland; D055768:Halogenated Diphenyl Ethers / Q000378:metabolism*; D008099:Liver / Q000378:metabolism; D058751:Livestock / Q000378:metabolism; D008297:Male; D008431:Maternal-Fetal Exchange; D008892:Milk / Q000378:metabolism; D009132:Muscles / Q000378:metabolism; D011078:Polychlorinated Biphenyls / Q000378:metabolism*; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000378:metabolism; D011247:Pregnancy; D012053:Reindeer / Q000378:metabolism*; D050497:Stillbirth / Q000453:epidemiology / Q000662:veterinary
D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004785:Environmental Pollutants; D055768:Halogenated Diphenyl Ethers; D000072317:Polychlorinated Dibenzodioxins; D011078:Polychlorinated Biphenyls