Yves de Lafontaine

Environment and Climate Change Canada

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Daniel Martineau

Université de Montréal

Simon-Pierre Despatie

Environment and Climate Change Canada

Ian D. Hogg

University of Waikato

John C. Harshbarger

Washington University Medical Center

Igor Mikaelian

Gilead Sciences (United States)

Chantal Ménard

Université du Québec à Montréal

Pierre Gagnon

Montreal Heart Institute

I. Mikaelian

Gilead Sciences (United States)

Jérôme Marty

International Association for Great Lakes Research

Hing Man Chan

University of Ottawa

Cooperative Institutions

Environment and Climate Change Canada

Université de Montréal

Université du Québec à Montréal

Université Laval

Fisheries and Oceans Canada

McGill University

GDG Environnement

Ministère des Forêts, de la Faune et des Parcs

Institut National de la Recherche Scientifique

Université du Québec à Rimouski

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Metal contamination in zebra mussels (Dreissena polymorpha) along the St. Lawrence River.

Environmental Monitoring and Assessment (2003)

K.H.M. Kwan Hing Man Chan Yves de Lafontaine

Dreissena

Zebra mussel

Seasonality

Bioconcentration

10.1023/a:1025517007605

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Citations (72)

Temporal occurrence of ichthyoplankton in relation to hydrographic and biological variables at a fixed station in the St Lawrence Estuary

Estuarine Coastal and Shelf Science (1984)

Yves de Lafontaine Michael Sinclair M. I. El‐Sabh Claude Lassus Robert O. Fournier

Ichthyoplankton

10.1016/0272-7714(84)90105-7

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Citations (26)

Jaw ulcers in Atlantic tomcod, Microgadus tomcod (Walbaum), from the St Lawrence River

Journal of Fish Diseases (1997)

Stéphane Lair Y. Mailhot Robert Higgins D. Bélanger Laurent Berthiaume

A survey of external lesions on Atlantic tomcod from the St Lawrence River was carried out between mid‐December 1992 and the end of January 1993 ( n = 1674). Jaw ulcerations were observed in 3.8% of the fish. These ulcers were usually single, and located at the junction between the skin epidermis and oral mucosa. They progressed from shallow lesions to deep ulcers with pathological fracture of the facial bone secondary to osteitis. The aetiology of these lesions could not be determined. Fish with ulcers were generally older than those of the monitored spawning population. The reason for a higher prevalence in older tomcods is unknown, but decreased immune functions and healing capacity caused by ageing are suggested as potential predisposing factors.

Etiology

Epidermis (zoology)

10.1046/j.1365-2761.1997.d01-101.x

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Citations (6)

Genetic evidence for a Hyalella species complex within the Great Lakes - St. Lawrence River drainage basin: implications for ecotoxicology and conservation biology

Canadian Journal of Zoology (1998)

Ian D. Hogg Céline Larose Yves de Lafontaine Kenneth G. Doe

We examined the population genetic structure (allozyme variation) of Hyalella azteca (Saussure) (Amphipoda:Crustacea) collected from six field locations and one laboratory culture within and near the Great Lakes St. Lawrence Riverdrainage basin. We found considerable variability in allele frequency among locations. Wrights F ST value averaged over 10polymorphic allozyme loci was 0.56 (range 0.100.93), indicating very great levels of genetic differentiation amonglocations. Analyses of genetic distance (Neis, Rogers) suggested the presence of four genetically distinct groups. For thelaboratory population, differences were of sufficient magnitude to merit consideration as a separate (presently undescribed)species of Hyalella, showing fixed differences at 2 of 10 loci examined. The presence of genetically distinctspecies/populations within H.azteca potentially confounds the results of laboratory ecotoxicology tests, depending on whichindividuals are used in an analysis. Accordingly, we urge caution where results may be used to establish water-quality criteria.From a conservation perspective, the presence of an undescribed species within a relatively well known taxon such as H.aztecasuggests that current taxonomic inventories of benthic invertebrates may not only be incomplete, but perhaps grosslyunderestimated. We advocate a taxonomic reevaluation of H azteca and other widespread benthic taxa, with particular

Hyalella azteca

10.1139/z98-034

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Citations (61)

Introduction and Transfer of Alien Aquatic Species in the Great Lakes–St. Lawrence River Basin

Yves de Lafontaine Georges Costan

This chapter presents an overview of the current status of alien species in the Great Lakes–St. Lawrence River ecosystem, providing the first such assessment for the St. Lawrence River. It also evaluates the importance of downstream relative to upstream transfer of alien species between the Great Lakes and the St. Lawrence River. More precisely, this analysis has the following aims: 1) to list the species introduced and established in the Great Lakes and in the St. Lawrence River in the past 200 years, 2) to examine the relative proportion of introduced species now found in each region, and 3) to assess and compare the historic and present rate of species introductions in each region and thereby determine the extent to which the St. Lawrence River represents a potential source of alien species for the Great Lakes and other tributary drainage basins. For convenience, our inventory follows that of Mills et al. (1993) in including only freshwater aquatic species and excluding strictly terrestrial plants and large vertebrates such as reptiles, birds, and mammals.

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Suprasellar germinoma in three lake whitefish (Coregonus clupeaformis)

Acta Neuropathologica (2000)

I. Mikaelian J.‐M. Lapointe Yves de Lafontaine John C. Harshbarger Richard J. Côté

Coregonus clupeaformis

Germinoma

Subarachnoid space

Parenchyma

Neuropil

10.1007/s004019900171

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Citations (3)

Antifouling Effectiveness and Potential Toxicological Risk of an Elastomer-Based Coating against Zebra Mussels

Environment and Natural Resources Research (2016)

Yves de Lafontaine Julie Veillette

The fouling of hard substrates by zebra mussels (Dreissena sp.) in freshwater ecosystems is a persistent problem which calls for antifouling treatments being fully efficient, long-lasting, and environmentally safe. The present study assessed the potential toxicological impact and the effectiveness of an elastomer-based coating containing salts that would make surfaces repulsive to zebra mussel attachment. Laboratory testing using standard analytical methods for water and wastewater, and a battery of six bioassays confirmed that the leachates from the coating exhibited no toxic response suggesting its safety to the receiving environment. In situ experiments using multi-plate collectors indicated that biofouling by zebra mussels and sponges on coated surfaces was effectively reduced by up to 97% over one growing season. Effectiveness of the coating was slightly less (82%) during the second growing season. Results suggested that the repulsive effect would be due to the presence of salts within the elastomer-based coating affecting both zebra mussels and other freshwater organisms. Saltwater experiments indicated that the coating was totally ineffective to prevent biofouling in marine environments. In addition of being environmentally safe to use, results suggested that the coating can be an effective antifouling product for submerged structures in freshwater environments.

Biofouling

Dreissena

Zebra mussel

Biocide

Freshwater ecosystem

10.5539/enrr.v6n4p125

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Citations (1)

Zebra Mussel Monitoring in the Richelieu River: A Fruitful Interaction between Scientific Research and Public Involvement

Springer eBooks (2004)

Yves de Lafontaine Marcel Comiré

Zebra mussel

Dreissena

10.1007/978-1-4757-4080-6_5

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Citations (1)

Sulfonylurea herbicides in an agricultural catchment basin and its adjacent wetland in the St. Lawrence River basin

The Science of The Total Environment (2014)

Yves de Lafontaine Conrad Beauvais Allan J. Cessna Pierre Gagnon Christiane Hudon

Sulfonylurea

Freshwater ecosystem

10.1016/j.scitotenv.2014.01.094

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Citations (40)

Neoplastic and nonneoplastic hepatic changes in lake whitefish (Coregonus clupeaformis) from the St. Lawrence River, Quebec, Canada.

Environmental Health Perspectives (1998)

I. Mikaelian Yves de Lafontaine Chantal Ménard Patrice Tellier John C. Harshbarger

As part of a survey of fish diseases, lake whitefish (Coregonus clupeaformis) were collected in fall 1995 from the St. Lawrence River 15 km upstream of Quebec City, Quebec, Canada, to assess the prevalence of liver lesions. A total of 141 fish were captured and necropsied, and three standard sections of liver were taken for histological examination. Prevalences of altered hepatocyte foci, hepatocellular carcinoma, cholangioma, and cholangiocarcinoma were 0.7%, 2.1%, 0.7%, and 2.1%, respectively. Thus, the overall prevalence of liver neoplasia was 4.9% (7/141). Hepatic tumors were only observed in fish 7 years old or older. Fish age was significantly and positively correlated with the index assessing the number and size of macrophage aggregates (p<0.001; rs = 0.16). Hepatocyte vacuolation, anisokaryosis, lymphocytic infiltration, and bile duct hyperplasia were also observed but were not related to the age, length, sex, or condition factor of the fish. These results represent the first report on a series of hepatic tumors in a wild salmonid species.

Coregonus clupeaformis

10.1289/ehp.98106179

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Citations (20)