Concentrations of persistent organochlorine contaminants in bowhead whale tissues and other biota from northern Alaska: Implications for human exposure from a subsistence diet

2005 ◽  
Vol 98 (3) ◽  
pp. 329-340 ◽  
Author(s):  
P.F. Hoekstra ◽  
T.M. O’Hara ◽  
S.M. Backus ◽  
C. Hanns ◽  
D.C.G. Muir
Keyword(s):  
Human Exposure ◽  
Bowhead Whale ◽  
Persistent Organochlorine ◽  
Organochlorine Contaminants ◽  
Northern Alaska

scholarly journals Concentrations of selected persistent organochlorine contaminants in store-bought foods from northern Alaska

2005 ◽  
Vol 64 (4) ◽  
pp. 303-313 ◽  
Author(s):  
Todd M. O’Hara ◽  
Paul F. Hoekstra ◽  
Cyd Hanns ◽  
Sean M. Backus ◽  
Derek C. G. Muir
Keyword(s):  
Persistent Organochlorine ◽  
Organochlorine Contaminants ◽  
Northern Alaska

Historical versus recent levels of organochlorine contaminants in lamprey larvae of the St. Lawrence River basin, Québec

1995 ◽  
Vol 52 (2) ◽  
pp. 268-275 ◽  
Author(s):  
Claud B. Renaud ◽  
Klaus L. E. Kaiser ◽  
Michael E. Comba
Keyword(s):  
Organochlorine Pesticides ◽  
River Basin ◽  
Inverse Relationship ◽  
Polychlorinated Biphenyl ◽  
Persistent Organochlorine ◽  
Significant Inverse Relationship ◽  
Pcb Congeners ◽  
Organochlorine Contaminants ◽  
St Lawrence River

This study shows that persistent organochlorine contaminants, including PCBs, reached higher concentrations in lamprey of the St. Lawrence River basin 40 years ago. A comparison was made of the concentrations of 22 organochlorine pesticides and 93 polychlorinated biphenyl (PCB) congeners in formalin-preserved lamprey ammocoetes collected between 1947–1950 and in 1990 in the St-François and Ste-Anne rivers, St. Lawrence River basin, Québec. Eight pesticides (β-BHC, α-Chlordane, γ-Chlordane, p,p′-DDD, o,p′-DDE, p,p′-DDE, p,p′-DDT, and Heptachlor) reached higher concentrations in the earlier period, with Mirex being the only pesticide found in higher concentrations in 1990. Seventeen PCB congeners (24(27), 28, 98(84), 101, 110(77), 128, 129, 141, 149, 151, 158, 174, 177, 180, 183, 187(182), and 198) had higher concentrations in the 1947–1950 period compared with 1990. A significant inverse relationship was found between the concentration of the various PCB congeners and sampling date. The concentrations of DDT have decreased significantly, while its metabolites, DDD and DDE, have increased significantly over the last 40 years.

Occurrence of persistent organochlorine contaminants in human milk collected in several regions of Czech Republic

Chemosphere ◽  
1996 ◽  
Vol 33 (8) ◽  
pp. 1485-1494 ◽  
Author(s):  
R. Schoula ◽  
J. Hajšlová ◽  
V. Bencko ◽  
J. Poustka ◽  
K. Holadová ◽  
...  
Keyword(s):  
Czech Republic ◽  
Human Milk ◽  
Persistent Organochlorine ◽  
Organochlorine Contaminants

scholarly journals Use of Subsistence-Harvested Whale Carcasses by Polar Bears in the Southern Beaufort Sea

ARCTIC ◽  
2019 ◽  
Vol 72 (4) ◽  
pp. 404-412 ◽  
Author(s):  
Kate M. Lillie ◽  
Eric M. Gese ◽  
Todd C. Atwood ◽  
Mary M. Conner
Keyword(s):  
Polar Bear ◽  
Indigenous Communities ◽  
Beaufort Sea ◽  
Bowhead Whale ◽  
Annual Number ◽  
Polar Bears ◽  
Northern Coast ◽  
Open Population ◽  
Hair Samples ◽  
Northern Alaska

The availability of a food subsidy has the potential to influence the condition, behavior, fitness, and population dynamics of a species. Since the early 2000s, monitoring efforts along the coast of northern Alaska have indicated a higher proportion of polar bears (<i>Ursus maritimus</i>) of the southern Beaufort Sea (SB) subpopulation coming onshore to feed on subsistence-harvested bowhead whale (<i>Balaena mysticetus</i>) carcasses during the fall and early winter seasons. Concurrently, Indigenous communities annually hunt bowhead whale and deposit the unused remains at localized “bone piles,” creating the potential for human-bear interactions. Our objective was to determine the annual number of polar bears feeding at the bone pile near Kaktovik, Alaska. Using a hair snag surrounding the bone pile, we collected hair samples to identify individual bears via microsatellite genotypes during 2011 – 14. We used capture-mark-recapture data in the POPAN open-population model to estimate the number of bears visiting the bone pile. We estimated that as many as 72 (SE = 9) and 76 (SE = 10) male and female polar bears, respectively, used the bone pile located at Kaktovik, Alaska, in 2012, which represents approximately 16% of the SB polar bear subpopulation. It will be important to monitor the number of bears using the bone pile and subsequent human-bear interactions and conflicts along the northern coast of Alaska, if sea ice continues to recede.

Accumulation of persistent organochlorine contaminants in milk and serum of farmers from Ghana

2008 ◽  
Vol 106 (1) ◽  
pp. 17-26 ◽  
Author(s):  
William J. Ntow ◽  
Laud Mike Tagoe ◽  
Pay Drechsel ◽  
Peter Kelderman ◽  
Huub J. Gijzen ◽  
...  
Keyword(s):  
Persistent Organochlorine ◽  
Organochlorine Contaminants

PERSISTENT ORGANOCHLORINE CONTAMINANTS IN RINGED SEALS (PHOCA HISPIDA) FROM THE KARA SEA, RUSSIAN ARCTIC

1998 ◽  
Vol 17 (9) ◽  
pp. 1745 ◽  
Author(s):  
Haruhiko Nakata ◽  
Shinsuke Tanabe ◽  
Ryo Tatsukawa ◽  
Yasuhiro Koyama ◽  
Nobuyuki Miyazaki ◽  
...  
Keyword(s):  
Kara Sea ◽  
Russian Arctic ◽  
Phoca Hispida ◽  
Persistent Organochlorine ◽  
Ringed Seals ◽  
Organochlorine Contaminants
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