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Temporal trends in dioxins (polychlorinated dibenzo-p-dioxin and dibenzofurans) and dioxin-like polychlorinated biphenyls in Baltic herring (Clupea harengus)
2013
Miller, Aroha | Hedman, Jenny E. | Nyberg, Elisabeth | Haglund, Peter | Cousins, Ian T. | Wiberg, Karin | Bignert, Anders
Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyl (dl-PCBs) concentrations in Baltic herring (Clupea harengus) have been relatively stable since the mid to late 1990s. It is unclear why concentrations in Baltic herring are not following the observed decreases in other environmental matrices. Here, changes in long-term temporal trends in Baltic herring were examined. A number of biological variables were examined alongside the temporal trends to investigate whether fish biology e.g., growth (length, weight, age), lipid content, reproductive phase or fishing date may provide an explanation for the temporal trends observed.Significant (p<0.05) decreasing trends were observed for PCDD/F toxic equivalents (TEQPCDD/F) at three of the four sites (lipid weight (lw) and wet weight (ww), Swedish west coast lw only); however, other TEQ values e.g., TEQPCDD, TEQPCDF, TEQdl-PCB, TEQPCDD/F+dl-PCB were inconsistent, decreasing at some sites but not others. In the most recent 10years of data, fewer significant decreases were seen overall. Over the examined time period, significant decreases (Bothnian Bay, p<0.01, southern Baltic Proper, p<0.02) and increases (Swedish west coast, p<0.02) in lipid content, growth dilution or lack thereof, and significant changes in age were observed. However herring were not randomly selected which biases this result. Continual efforts to decrease PCDD/F and dl-PCB emissions and to locate/reduce hotspots are necessary, while bearing in mind that herring biology may be impeding faster decreases of these chemicals.
اظهر المزيد [+] اقل [-]Fate of airborne polychlorinated dibenzo-p-dioxins and dibenzofurans in an agricultural ecosystem
1998
Welsch-Pausch, K. | McLachlan, M.S. (Ecological Chemistry and Geochemistry, University of Bayreuth, 95440 Bayreuth (Germany))
Environmental contamination and developmental abnormalities in eggs and hatchlings of the common snapping turtle (Chelydra serpentina serpentina) from the Great Lakes-St Lawrence River basin (1989-91)
1998
Bishop, C.A. | Ng, P. | Pettit, K.E. | Kennedy, S.W. | Stegeman, J.J. | Norstrom, R.J. | Brooks, R.J. (Environment Canada, Canadian Wildlife Service, 867 Lakeshore Road, Box 5050, Burlington, Ontario, L7R 4A6 (Canada))
Congener specific transfer of PCDD/Fs from air to cows' milk: an evaluation of current modelling approaches
1997
Douben, P.E.T. | Alcock, R.E. | Jones, K.C. (Her Majesty's Inspectorate of Pollution, 2 Marsham Street, London SW1P 3EB (United Kingdom))
Distribution of polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and non-ortho coplanar polychlorinated biphenyls in river and offshore sediments
1997
Ohaski, Y. | Matsueda, T. | Kurokawa, Y. (Environmental Science Division, Fukuoka Institute of Health and Environmental Sciences, 39 Mukaeda, Mukaizano, Dazaifu, Fukuoka 818-01 (Japan))
A study of the influence of sewage sludge fertilization on the concentrations of PCDD/F and PCB in soil and milk
1994
McLachlan, M.S. | Hinkel, M. | Reissinger, M. | Hippelein, M. | Kaupp, H. (Ecological Chemistry, University of Bayreuth, 95440 Bayreuth (Germany))
PCBs and PCDD/Fs in lake sediments of Grosser Arbersee, Bavarian forest, South Germany
1997
Bruckmeier, B.F.A. | Juttner, I. | Schramm, K.W. | Winkler, R. | Steinberg, C.E.W. | Kettrup, A. (GSF-National Research Center for Environment and Health, Institute of Ecological Chemistry, D-85764, Obserschleissheim (Germany))
Monitoring of micropollutants in fish and shellfish from the Grenland fjords (S. Norway) 1997
1999
Knutzen, J. | Bjerkeng, B. | Brevik, E.M. | Green, N.W. (NIVA - Norsk Inst. for Vannforskning, Oslo (Norway)) | Becher, G. | Biseth, Aa. | Schlabach, M. | Skaare, J.U.
