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LEBEUF, M., I. ST-PIERRE, Y. CLERMONT, C. GOBEIL, 1999. Concentrations de biphényles polychlorés (BPC) et de pesticides organochlorés chez trois espèces de poissons de fond de l'estuaire et du golfe du Saint-Laurent et du fjord du Saguenay. Rapp. stat. can. sci. halieut. aquat., 1059, 108 p .
Concentrations of polychorinated biphenyls (PCBs) and organochlorine pesticides were determined in muscle and liver of Atlantic cod (Gadus morhua), American plaice (Hippoglossoides platessoides) and Greenland halibut (Reinhardtius hippoglossoides), which were sampled from the Estuary and Gulf of St. Lawrence, and from the Saguenay Fjord. The analyses included measurements of more than 35 organochlorine compounds, including approximately twenty PCB congeners, in 56 tissue samples. This report summarises data from over 1 900 individual measurements. All of the tissues contain measurable quantities of most of the PCBs and organochlorine pesticides. All fish have higher levels of contaminants in liver compared to muscle tissue. Liver concentrations are highest in cod and lowest in plaice, while concentrations in muscle are highest in halibut and lowest in cod. Regardless of the species, concentrations of contaminants are similar in samples from the Saguenay and the Estuary but are generally higher than in samples from the northeastern Gulf. According to the Canadian guidelines for the protection of human health, levels of total PCB and of DDT and its metabolites in fish tissues should not exceed 2 000 and 5 000 ng/g (wet weight), respectively. The levels of PCBs and organochlorine pesticides measured in muscle and liver samples of cod, plaice and halibut in this study are less than these guidelines. In fish livers, the highest concentrations of PCBs are less than one-half of the guideline, while levels of DDT and its metabolites are less than one-tenth of the guideline. In fish muscle, concentrations are up to 10 and 100 times lower than the guidelines, for PCBs and for DDT and its metabolites, respectively.
PELLETIER, É., G. CANUEL, J. PADROS, Y. CLERMONT, C. GOBEIL, 1999. Concentrations d'hydrocarbures aromatiques polycycliques chez quatre espèces de poissons de fond et deux espèces de crustacés de l'estuaire et du golfe du Saint-Laurent et du fjord du Saguenay. Rapp. stat. can. sci. halieut. aquat., 1052, 20 p .
This report summarizes work done conjointly by INRS-Océanologie (Université du Québec, Rimouski, Québec) and the Maurice Lamontagne Institute (Department of Fisheries and Oceans, Mont-Joli, Québec) to determine levels of polycyclic aromatic hydrocarbons (PAHs) in Atlantic cod (Gadus morhua), American plaice (Hippoglossoides platessoides), thorny skate (Raja radiata), Greenland halibut (Reinhardtius hippoglossoides), and northern shrimp (Pandalus borealis) from the Estuary and Gulf of St. Lawrence as well as in snow crab (Chionoecetes opilio) from the St. Lawrence Estuary and the Saguenay Fjord. The specific compounds that we tried to detec were fluoranthe, pyrene, benzo(b)fluoranthene, benzo(k)fluoranthene, benco(a)pyrene, dibenzo(a,h,)anthracene, benzo(g,h,i)perylene, naphtalen, acenaphtene, fluorene, phenanthrene, and anthracene. Concentrations of all PAHs in the muscle tissue of cod (n=12), plaice (n=12), skate n=6), and halibut (n=6) were below the analytical detection limits. With the exception of benzo[a]anthracene, concentrations of PAHS were also below detection limits in halibut liver tissue (n=9) and crab hepatopancreas (n=9). In contrast, shrimp muscle (n=12) contained measurable levels of fluoranthene, pyrene, benzo[a]anthracene, phenanthrene, and anthracene. The presence of benzo[a]anthracene in shrimp muscle, halibut liver, and crab hepatopancreas detected by fluorimetry was not confirmed by the mass spectroscopy equipment used due to the very low levels. This study concludes that the concentrations of PAHs in the analyzed species are always very low, or even non detected, and consequently, considered safe for human consumption.
GOBEIL, C., Y. CLERMONT, G. PAQUETTE, 1997. Concentrations en mercure, plomb et cadmium chez diverses espèces de poissons de fond, de poissons pélagiques et de crustacés de l'estuaire et du golfe du Saint-Laurent et du fjord du Saguenay. Rapp. stat. can. sci. halieut. aquat., 1011, 88 p .
Concentrations of mercury, lead, and cadmium were determined in the muscle of northern shrimp (Pandalus borealis), in the muscle and hepatopancreas of snow crab (Chionoecetes opilio), and in the muscle, liver, and gonads of several fish species from the Estuary and Gulf of St. Lawrence and from the Saguenay Fjord. The fish species include Atlantic cod (Gadus morhua), Greenland halibut (Reinhardtius hippoglossoides), deepwater redfish (Sebastes mentella), American plaice (Hippoglossoides platessoides), thorny skate (Raja radiata), capelin (Mallotus villosus), Atlantic herring (Clupea harengus), and rainbow smelt (Osmerus mordax). The mercury concentrations in tissues of all species were 2 to 10 times lower than the Canadian guideline established to ensure human health protection, with the exception of those in the northern shrimp and snow crab from the Saguenay Fjord, which were near the guideline. Lead concentrations were low, and did not differ markedly, regardless of the species or the tissue, or whether it was from the gulf, the estuary or the fjord. Cadmium concentrations in fish muscle and gonads and in crustacean muscle were also low regardless of the location. However, as often observed, cadmium levels were higher in fish livers and snow crab hepatopancreas.
GOBEIL, C., D. PATON, F.A. McLAUGHLIN, R.W. MACDONALD, G. PAQUETTE, Y. CLERMONT, M. LEBEUF, 1991. Données géochimiques sur les eaux interstitielles et les sédiments de la mer de Beaufort. Rapp. stat. can. hydrogr. sci. océan., 101, 92 p .
Five sediment box-cores were collected in the Beaufort Sea in September 1990. This report contains the results of the analyses showing the vertical distributions of nutrients (PO4- 3, SiO4- 4, NO3- plus NO2-, NO2-, NH4+, sulfate, chloride, iron and manganese in the porewaters. The vertical profiles of phosphorus, biogenic silicon, carbon, nitrogen, some metals (Mn, Fe, Al, Cd, Pb, Zn) and 210-lead in the solid phase are also included.
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