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LADURANTAYE, R. de, C. DESJARDINS, R. NADEAU, Y. VIGNEAULT, J.-F. LARUE, 1990. Les contaminants dans le Saint-Laurent : bilan des connaissances dans le système aquatique marin. Pages 105- 134 in D. Messier, P. Legendre & C.E. Delisle (éd.). Symposium sur le Saint-Laurent : un fleuve à reconquérir. Association des biologistes du Québec et Centre Saint-Laurent (Collection environnement et géologie, 11) .
OUELLET, Y., Y. ROPARS, Y. VIGNEAULT, 1990. Étude hydro-sédimentologique de la réouverture de la lagune du Havre aux Basques, Îles-de-la-Madeleine. Rapp. tech. can. sci. halieut. aquat., 1766, 62 p .
This report presents a hydrology and sediment transport study included in the project to open the Havre aux Basques lagoon. Mainly discussed are the stability conditions in opening the pass under the influence of the main parameters that come into play. These parameters are mainly tide and coastal transport of sediments by wave action.
PINEL-ALLOUL, B., G. MÉTHOT, G. VERREAULT, Y. VIGNEAULT, 1990. Zooplankton species associations in Quebec lakes : variation with abiotic factors, including natural and anthropogenic acidification. Can. J. Fish. Aquat. Sci., 47: 110-121 .
PINEL-ALLOUL, B., G. MÉTHOT, G. VERREAULT, Y. VIGNEAULT, 1990. Phytoplankton in Quebec lakes : variation with lake morphometry, and with natural and anthropogenic acidification. Can. J. Fish. Aquat. Sci., 47: 1047-1057 .
GAUTHIER, D., L. DESJARDINS, J. ROBITAILLE, Y. VIGNEAULT, 1989. River spawning of artificially reconditioned Atlantic salmon (Salmo salar). Can. J. Fish. Aquat. Sci., 46: 824-826 .
BERTRAND, P., G. VERREAULT, Y. VIGNEAULT, G. WALSH, 1988. Biphényles polychlorés dans les sédiments et les organismes marins de la Baie-des-Anglais (Côte-Nord du golfe du Saint-Laurent). Rapp. tech. can. sci. halieut. aquat., 1669, 42 p .
Since 1983, the Baie-des-Anglais is considered to be the coastal area most contaminated by PCB in the St . Lawrence estuary. Local industrial effluent pourings are at the origin of this contamination. This study has defined the PCB dispersion pattern, identified and determined the extent of the long term accumulation area and established an accumulation rate of contaminated sediments. In this perspective, biological (Buccinum undatum L. and Mytilus edulis L.) and physico-chemical indicators (sediments, Pb, Zn and Cs-137) have been utilized. In the Baie-des-Anglais, the dispersion pattern extends from the Anse du Moulin, t o about 4 km Baie Comeau at depths up t o 70-80 m. A more permanent accumulation zone takes place at the center of this dispersion pattern where the contaminated particules in suspension are accumulated in sediments at a rate of 0,2 cm yr-1. Contamination of the marine organism seems t o confirm this dispersion model. A significant relationship between the PCB content in sediments and whelk of the Baie-des-Anglais is observed.
WALSH, G., Y. VIGNEAULT, 1986. Analyse de la qualité de l'eau de rivières de la Côte-Nord du golfe Saint-Laurent en relation avec les processus d'acidification. Rapp. tech. can. sci. halieut. aquat., 1540, 118 p .
Physico-chemical data from 33 rivers of the North Shore of the St. Lawrence River, sampled periodically from 1981 to 1986, were analyzed within a research program on acid deposition. The river watersheds are very sensitive to acid fallouts in view of the weak weatherability of the bedrock (granite and granite gneiss) and the noncalcareous surface deposits as well as the low levels of alkalinity (mean ± standard deviation : 59 ± 50 µeq HCO3-/l) and conductivity (21 ± 8 µS/cm) of the surface waters. During the spring snowmelt, the pH levels of several rivers dropped below 5.5 and, in some cases, the alkalinity practically disappeared. Non-marine sulfates concentrations followed a decreasing gradient from west to east. Background SO4-2 concentrations were around 20-30 µeq/l. Estimated organic anions were high (46 ± 12 µeq RCOO-/l), representing 36 % (± 14 %) of the anions. The use of a model showed a marked spring acidification for most of the rivers. The integration of RCOO- in the model revealed the acidification was due, for several rivers, to organic acids, which are important in the ionic equilibrium of fluvial waters of the North Shore, especially in the eastern portion of the study area.
DELVAL, C., S. FOURNIER, Y. VIGNEAULT, 1986. Polychlorinated biphenyl residues in some marine organisms from the Baie des Anglais (Baie-Comeau, Quebec, Saint-Lawrence Estuary). Bull. Environ. Contam. Toxicol., 37: 823-829 .
BERTRAND, P., S. FOURNIER, Y. VIGNEAULT, 1986. Concentrations en biphényles polychlorés et en métaux dans les sédiments et les organismes marins de la baie des Anglais. Rapp. stat. can. sci. halieut. aquat., 568, 50 p .
Data, from the analysis of marine sediment and organism samples collected during the automn of 1983 and the summer of 1984, are tabulated. Cd, Cr, Pb, Zn, Hg, As, oil and grease, and polychlorinated biphenyl concentrations in the surface sediments and Pb, Zn and Cs-137 concentrations in the sediment cores are measured. Polychlorinated biphenyl and metal (Cd, Pb, Zn, Cu, Al, Ni, Cr, Fe, Mn, Hg) concentrations are analysed in the blue mussel (Mytilus edulis), whelk (Buccinum undatum), herring (Clupea harengus harengus) and eel (Anguilla rostrata).
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