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Bibliography of the Maurice Lamontagne Institute

Daniel GAUTHIER

DRAPEAU, G., D. GAUTHIER, D. LAVALLÉE, 1999. In situ deposition versus transport by density currents of dredged sediments dumped in coastal waters. J. Coast. Res., 15(1): 87-96 .

HARVEY, M., M. GILBERT, D. GAUTHIER, D.M. REID, 1999. A preliminary assessment of risks for the ballast water-mediated introduction of nonindigenous marine organisms in the Estuary and Gulf of St. Lawrence. Can. Tech. Rep. Fish. Aquat. Sci., 2268, 56 p .

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Risks for the introduction of nonindigenous marine species into the Estuary and Gulf of St. Lawrence (EGSL) by foreign commercial shipping activities were evaluated by conducting three different surveys to characterize 1) the vessel traffic of foreign origin in the EGSL, 2) ballasting operations of foreign vessels entering ports of the EGSL, and 3) the biodiversity and species richness of protistan and metazoan taxa found in ballast water and sediment of incoming foreign vessels.

MUNRO, J., D. GAUTHIER, J.A. GAGNÉ, 1998. Description d'une frayère de hareng (Clupea harengus L.) à l'île aux Lièvres, dans l'estuaire moyen du Saint-Laurent. Rapp. tech. can. sci. halieut. aquat., 2239, 34 p .

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Several sampling operations with a grab, by diving and by underwater video, from May 31 to June 23, 1987, allowed us to localize a herring spawning ground on the north-west side of the upstream tip of l'île aux Lièvres in the St. Lawrence estuary. The spawning ground had a length of approximately 1600 m and a width varying between 50 and 250 m, covering an area of about 285,900 m2 between the 0 and 5 m depth contours. The substrate consisted mainly of gravel and pebbles; macrophytic algae (Odonthalia dentata, Phycodrys rubens) were abundant and the tidal current velocity exceeded at times 1.5 m.s-1. Examination of the development stage of the eggs and of oceanographic data indicated that the spawning in 1987 may have taken place between the 21st and 24th of May and that hatching peaked between the 9th and 12th of June. Mean proportion of dead eggs was low before and throughout hatching (13%) and increased considerably after hatching (53%). Total number of eggs was estimated at 1.65.1012, corresponding to approximately 94.8 million spawners or a biomass of 14,321 t.

HARVEY, M., D. GAUTHIER, J. MUNRO, 1998. Temporal changes in the composition and abundance of the macro-benthic invertebrate communities at dredged material disposal sites in the Anse a Beaufils, Baie des Chaleurs, Eastern Canada. Mar. Pollut. Bull., 36: 41-55 .

GAUTHIER, D., D.A. STEEL, 1996. A synopsis of the situation regarding the introduction of nonindigenous species by ship-transported ballast water in Canada and selected countries. Can. Manuscr. Rep. Fish. Aquat. Sci., 2380, 57 p .

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Each year, vessels transport hundreds of tonnes of ballast water around the world. Those waters and associated sediments contain hundreds of species of organisms, of wich many have established in new habitats and caused negative effects to human health, economy and environment. This report describes the Canadian situation, in its international context, regarding the introduction of nonindigenous species by ship-transported ballast water, reviewing specially vessel traffic, regulations, management and scientific research activities, and possible controls and treatments. Essentially, the international recognition of the problem has not led to concrete action in countries other than Australia, the United States, and more recently, Israel and Chile. Canada is particularly vulnerable to the introduction of nonindigenous species by ships, considering the large quantities of ballast water discharged in its ports and the near absence of control measures in region other than Great Lakes. As for many countries, Canada needs to assess the risks posed to its aquatic habitats and resources.

GAUTHIER, D., D.A. STEEL, 1996. Sommaire de la situation concernant l'introduction d'espèces non indigènes par l'eau de lest des navires au Canada et dans d'autres pays. Rapp. manus. can. sci. halieut. aquat., 2380, 62 p .

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Each year, vessels transport hundreds of tonnes of ballast water around the world. Those waters and associated sediments contain hundreds of species of organisms, of wich many have established in new habitats and caused negative effects to human health, economy and environment. This report describes the Canadian situation, in its international context, regarding the introduction of nonindigenous species by ship-transported ballast water, reviewing specially vessel traffic, regulations, management and scientific research activities, and possible controls and treatments. Essentially, the international recognition of the problem has not led to concrete action in countries other than Australia, the United States, and more recently, Israel and Chile. Canada is particularly vulnerable to the introduction of nonindigenous species by ships, considering the large quantities of ballast water discharged in its ports and the near absence of control measures in region other than Great Lakes. As for many countries, Canada needs to assess the risks posed to its aquatic habitats and resources.

GOSSELIN, S., M. LEVASSEUR, D. GAUTHIER, 1995. Transport and deballasting of toxic dinoflagellates via ships in the Grande Entree Lagoon of the Iles-de-la-Madeleine (Gulf of Saint-Lawrence, Canada). Pages 591-596 in 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 .

JACQUAZ, B., D. GAUTHIER, 1994. Présentation de l'approche Amoeba pour l'aménagement des ressources biologiques de la lagune du Havre aux Basques. Pages 105-117 in Actes de l'atelier sur l'aménagement d'un milieu lagunaire. Association pour la revalorisation de la lagune du Havre aux Basques et Ministère des pêches et des océans .

JACQUAZ, B., D. GAUTHIER, 1994. Bilan des inventaires écologiques de la lagune du Havre aux Basques. Pages 59-66 in Actes de l'atelier sur l'aménagement d'un milieu lagunaire. Association pour la revalorisation de la lagune du Havre aux Basques et Ministère des pêches et des océans .

ENNIS, J., K. DRINKWATER, P. OUELLET, P. BRUNEL, M. FRÉCHETTE, D. GAUTHIER, L. GENDRON, J. HIMMELMAN, C. HUDON, I. McQUINN, L. SAVARD, J. WORMS, 1991. Report of the Workshop on Invertebrates. Pages 47-54 in J.-C. Therriault (ed.). The Gulf of St. Lawrence : small ocean or big estuary ? Dept. of Fisheries and Oceans (Can. Spec. Publ. Fish. Aquat. Sci., 113) .

ENNIS, J., K. DRINKWATER, P. OUELLET, P. BRUNEL, M. FRÉCHETTE, D. GAUTHIER, L. GENDRON, J. HIMMELMAN, C. HUDON, I. McQUINN, L. SAVARD, J. WORMS, 1991. Rapport de l'atelier de travail sur les invertébrés. Pages 47-54 in J.-C. Therriault (éd.). Le golfe du Saint-Laurent : petit océan ou grand estuaire? Ministère des pêches et des océans (Publ. spéc. can. sci. halieut. aquat., 113) .

DRINKWATER, K.F., G.C. HARDING, W.P. VASS, D. GAUTHIER, 1991. The relationship of Quebec lobster landings to freshwater runoff and wind storms. Pages 179-187 in J.-C. Therriault (ed.). The Gulf of St. Lawrence : small ocean or big estuary ? Dept. of Fisheries and Oceans (Can. Spec. Publ. Fish. Aquat. Sci., 113) .

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 .

GAUTHIER, D., F. HAZEL, 1988. Abondance du homard américain (Homarus americanus) à l'île d'Anticosti. CSCPCA doc. rech., 88/36, 29 p .

GAUTHIER, D., F. HAZEL, 1986. Les évents d'échappement sur les casiers à homard : détermination de la dimension optimale. CSCPCA doc. rech., 86/71, 36 p .

Carapace measurements were taken from 922 lobsters collected from eight areas in Québec. Whit the prospect of the introduction of escape vents on lobster traps, we estimated the extent of the allometric variability of the carapace length-width relationship between regions and sexes. The comparison of length-width regression lines revealed sexual and regional differences in carapaces allometry. For a given length, the carapace of males was narrower than that of females. For both sexes from La Tabatière, carapace was narrower than in other regions. The regression equations were used to calculate the cumulative normal distribution of carapace width, which determines escapement. For legal size limit (76.2 mm CL) and males from all regions, except northwest of the Magdalen Islands and La Tabatière, the width distribution grids indicated that 99.6 % and 96.8 % were retained by 43 mm and 44 mm vents, respectively. Male lobsters from the northwest area of the Islands and from La Tabatière are slightly narrower. For female lobsters of all regions, except the southeast of the Magdalen Islands and La Tabatière 99.9 % and 99.1 %, were retained whit 43 mm and 44 mm vents, respectively. Female lobsters from the southeast of the Islands are slightly wider, while those from La Tabatière are slightly narrower. For the Magdalen Islands, these ``theoretical escapement rates`` corresponding to given vent sizes were applied to commercial catches sampled in 1985. With a 44 mm vent, escapement of sublegals varied according to the fishing areas of the archipelago, from 55.0 to 73.1 %. Retention of commercials was complete. With a 45 mm vent, escapement of sublegals reach 68.9-82.2 % while retention of commercials exceeded 99 %. Taking into account the carapace width distribution, the compressibility of the carapace and a possible increase in yield per effort resulting from the desaturation of traps, we recommend, for a 76.2 mm CL minimum legal size, the use of 43 mm and 44 mm wide vents for La Tabatière and for other areas of Québec respectively. If the target length was to be 81.0 mm CL, we recommend the use of 45 mm and 46 mm wide vents for La Tabatière and for other areas of Quebec, respectively. Finally, the use of a 44 mm vent in all areas of recommended if the present legal size is increased simultaneously to 81 mm CL for the North Shore and remains 76.2 mm CL elsewhere. The use of 44 mm vent in La Tabatière region would not lessen much the benefits of the measure compared to the use of the optimal 45 mm vent.