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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.
LEVASSEUR, M., T. GAMACHE, I. ST-PIERRE, S. MICHAUD, 1995. Does the cost of NO3- reduction affect the production of harmful compounds by Alexandrium excavatum?. Pages 463-468 Harmful Marine Algal Blooms : proceedings of the Sixth International Conference on Toxic Marine Phytoplankton, October 1993, Nantes, France. Lavoisier, Paris and Intercept Ltd, Andover, England .
LAYCOCK, M.V., S.W. AYER, M. BILODEAU, J.-P. GAGNÉ, S. HSIAO, J.F. JELLETT, A. LAWRENCE, M. LEDOUX, P. MASSELIN, D. McLACHLAN, S. MICHAUD, S.K. MOHAPATRA, K. SOHET, I. ST-PIERRE, K. THOMAS, B.M. TWAROG, 1992. Detection and quantification of toxic algae and toxins. Pages 81-90 in J.-C. Therriault & M. Levasseur (ed.). Proceedings of the Third Canadian Workshop on Harmful Marine Algae, Maurice-Lamontagne lnstitute, Mont-Joli, Québec, 12-14 May, 1992 .
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