Isomer-Specific Accumulation and Toxic Assessment of Polychlorinated Biphenyls, Including Coplanar Congeners, in Cetaceans from the North Pacific and Asian Coastal Waters

2000 ◽  
Vol 39 (3) ◽  
pp. 398-410 ◽  
Author(s):  
T. B. Minh, H. Nakata, M. Watanabe, S.
Keyword(s):  
Polychlorinated Biphenyls ◽  
Coastal Waters ◽  
North Pacific ◽  
The North ◽  
Specific Accumulation ◽  
The North Pacific

Testing mechanistic explanations of observed correlations between environmental factors and marine fisheries

2001 ◽  
Vol 58 (1) ◽  
pp. 208-219
Author(s):  
A E Gargett ◽  
M Li ◽  
R Brown
Keyword(s):  
Environmental Factors ◽  
Coastal Waters ◽  
North Pacific ◽  
Pacific Salmon ◽  
Mechanistic Explanation ◽  
Marine Fisheries ◽  
Predictive Tool ◽  
Mechanistic Explanations ◽  
The North ◽  
The North Pacific

Based on observed correlations, marine fisheries are often hypothesized to depend on environmental factors. Since correlations are unreliable as a predictive tool, it is desirable to seek mechanistic explanations for observed correlations. This paper considers methods available for testing such mechanistic explanations. As a specific example, we consider the optimal stability window, proposed as a mechanistic explanation of observed correlations between the survival of North Pacific salmon stocks and the state of the atmosphere over the North Pacific in winter, as applied to the coastal waters and fisheries of southern British Columbia, Canada.

Recent contamination of persistent chlorinated endocrine disrupters in cetaceans from the North Pacific and Asian coastal waters

2000 ◽  
Vol 42 (7-8) ◽  
pp. 231-240 ◽  
Author(s):  
T. B. Minh ◽  
M. S. Prudente ◽  
M. Watanabe ◽  
S. Tanabe ◽  
H. Nakata ◽  
...  
Keyword(s):  
Hong Kong ◽  
Pacific Ocean ◽  
Coastal Waters ◽  
North Pacific ◽  
Marine Pollution ◽  
North Pacific Ocean ◽  
Coplanar Pcbs ◽  
Tropical Regions ◽  
The North ◽  
The North Pacific

To elucidate the global distribution and toxicological impacts of persistent organochlorines (OCs) on cetaceans, the present study determined the concentrations of organochlorine pesticides such as DDT and its metabolites (DDTs), hexachlorocyclohexane isomers (HCHs), hexachlorobenzene (HCB), chlordane compounds (CHLs) and PCBs including toxic coplanar congeners in the blubber of 10 species of adult male odontoceti cetaceans collected from several locations in the North Pacific Ocean and coastal waters of Japan, Hong Kong, Philippines and India during 1985–1997. Concentrations of tris(4-chlorophenyl)methane (TCPMe) and tris(4-chlorophenyl)methanol (TCPMOH), which are among the newly identified contaminants, were also determined. Residue pattern was in the order of DDTs≥PCBs>CHLs>HCHs>HCB>TCPMOH>TCPMe. Greater DDT concentrations were found in cetaceans from the Japan Sea, coastal waters of Hong Kong and India, indicating serious marine pollution in industrialized Asian nations and current usage of DDTs in tropical regions. In general, cetaceans inhabiting cold and temperate waters contained relatively higher concentrations of PCBs, HCHs, CHLs and HCB as compared with those from tropical regions, reflecting atmospheric transport from the tropical sources to the northern sinks. Latitudinal distribution of TCPMe and TCPMOH in cetaceans from the North Pacific Ocean and Asian coastal waters was similar to that of DDTs, suggesting the less transportable nature of TCPMe and TCPMOH in the marine environment. Penta- and hexa-chlorobiphenyls were the predominant PCB congeners, accounting for about 70% of the total PCBs. 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents (TEQs) of non- and mono-ortho coplanar PCBs in the blubber of cetaceans ranged from 36 (in spinner dolphin from Philippines) to 510 pg/g wet wt (in hump-backed dolphin from Hong Kong). Toxic evaluation of coplanar PCBs using TEQ concept indicates an increasing impact on cetaceans from mid-latitudes. Mono-ortho congener IUPAC 118 or non-ortho congener IUPAC 126 was estimated to have the greatest toxicity contribution. The estimated TEQ concentrations in the blubber of some cetacean species exceeded the level associated with immunosuppresion in harbour seals.

Widespread contamination by tris (4-chlorophenyl)methane and tris (4-chlorophenyl)methanol in cetaceans from the North Pacific and Asian coastal waters

2000 ◽  
Vol 110 (3) ◽  
pp. 459-468 ◽  
Author(s):  
T.Binh Minh ◽  
M Watanabe ◽  
S Tanabe ◽  
N Miyazaki ◽  
T.A Jefferson ◽  
...  
Keyword(s):  
Coastal Waters ◽  
North Pacific ◽  
The North ◽  
The North Pacific

Intra-seasonal and inter-annual patterns in the demographics of sand lance and response to environmental drivers in the North Pacific

2019 ◽  
Vol 617-618 ◽  
pp. 221-244 ◽  
Author(s):  
MR Baker ◽  
ME Matta ◽  
M Beaulieu ◽  
N Paris ◽  
S Huber ◽  
...  
Keyword(s):  
North Pacific ◽  
Environmental Drivers ◽  
Sand Lance ◽  
The North ◽  
The North Pacific ◽  
Annual Patterns
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