247 research outputs found
Whole-lake food web model indicates alewife invasion fueled lake trout restoration and altered patterns of trophic flow Lake Champlain
No full textInternational audienceFood web responses to invasion can be context-dependent and therefore difficult to predict based only on invasion histories. Alewives (Alosa pseudoharengus) had generally negative impacts on the native fish communities of the Laurentian Great Lakes after they invaded in the 19th century and were thus expected to negatively impact the Lake Champlain food web after entering the lake in 2003. We evaluated the impact of alewives on the Lake Champlain food web by compiling 25 years of biomass, abundance, and diet data and constructing an Ecopath with Ecosim model of the coldwater food web. Model projections indicated that, contrary to the Great Lakes experience, biomass of native predators increased, mortality rates decreased, and overall trophic level of the pelagic fish community decreased after alewife entered the system. Consequently, the amount of primary production supporting predator biomass increased in response to the addition of prey fish production. The model suggests that alewife invasion in Lake Champlain could have altered food web structure by transferring more energy to tertiary consumers via pelagic pathways at the expense of other energy pathways and "jump started" wild lake trout recruitment by expanding the forage base. In contrast to the Great Lakes response to alewife invasion, Lake Champlain may represent an alternate trajectory for alewife invasion and demonstrates that alewife impacts are context-dependent
Increases of spinal kinin receptor binding sites in two rat models of insulin resistance
No full textAn autoradiographic study was conducted to determine whether kinin receptors are altered in the rat spinal cord in two experimental
models of chronic hyperglycemia and insulin resistance. Sprague-Dawley rats were given 10% d-glucose in their drinking water alone or
with insulin (9 mU/kg/min with osmotic pumps) for 4 weeks. Both groups and control rats were treated either with a normal chow diet
or with an alpha-lipoic acid-supplemented diet as antioxidant therapy. After 4 weeks of treatment, glycemia, insulinemia, blood pressure,
insulin resistance index, the production of superoxide anion in the aorta and the density of B1 receptor binding sites in the dorsal horn were
significantly increased in the two models. These effects were prevented or attenuated by alpha-lipoic acid. In contrast, B2 receptor binding
sites of most spinal cord laminae were increased in the glucose group only and were not affected by alpha-lipoic acid. Results show that
chronic hyperglycemia associated with insulin resistance increases B1 and B2 receptor binding sites in the rat spinal cord through distinct
mechanisms, including the oxidative stress for the B1 receptor
ERTS-1 imagery of the Lake Champlain region: A first look
No full textThe author has identified the following significant results. First-look analysis of RBV imagery of Lake Champlain and adjacent areas provided the following information on land and water resources: (1) location and shape of islands over 200 meters at narrowest part; (2) location of manmade structures at least 10 meters across; (3) location of shoreline; (4) identification of algal blooms and major turbidity boundary; (5) identification of lake bottom features in sandy, shallow areas; (6) identification of major lake shore wetland and floodplain wetlands; (7) location of major streams; (8) identification of ice marginal deposits of major proportions and former shorelines of Champlain Sea; (9) identification of wooded areas, open land, and built-up areas
Troisième centenaire de la fondation de Québec, berceau du Canada, par Champlain, 1608-1908 [ressource électronique] : travaux préliminaires, délibé rations, documents /
No full textTitre de la couv.: Fêtes du troisième centenaire de la fondation de Québec par Champlain : projets, délibérations, documents.Titre de départ: Trois-centième anniversaire de la fondation de Québec.Comprend un appendix.Reproduction électronique.Mode of access: Internet.Mode d'accès: World Wide Web.4
Canada 1616 2008
No full textOther title
On ne m'y emmènerait pas : les hommes, les lieux et les histoires retrouvées des voyages de Samuel Champlain au Canada, 1603-1616
Includes
Hermann, Michael J. On ne m'y emmènerait pas : les hommes, les lieux et les histoires retrouvées des voyages de Samuel Champlain au Canada, 1603-1616.
Includes text, numerous insets, and color illustrations.Color1:1,000,00
Hôpital Notre-Dame, 1560, rue Sherbrooke Est, Montréal, 1922-1924
No full textArchitectes du bâtiment d'origine: E. F. Stevens, W. J. Lee et Alfred-Hector Lapierre; Architectes chargés de construire une nouvelle aile sur la rue De Champlain: E. F. Stevens, W. J. Lee, Louis-Auguste et Pierre-Charles Amos; Firme d'architectes chargée de construire les pavillons Lachapelle et Mailloux: Crevier, Lemieux et Mercier; Dates de construction du bâtiment d'origine: 1922-1924; Date d'inauguration: 25 août 1924; Date de construction de la nouvelle aile sur la rue De Champlain: 1930; Dates de construction des pavillons Lachapelle et Mailloux: 1952-1960; Photographie prise vers 197
Hôpital Notre-Dame, 1560, rue Sherbrooke Est, Montréal, 1922-1924
No full textArchitectes du bâtiment d'origine: E. F. Stevens, W. J. Lee et Alfred-Hector Lapierre; Architectes chargés de construire une nouvelle aile sur la rue De Champlain: E. F. Stevens, W. J. Lee, Louis-Auguste et Pierre-Charles Amos; Firme d'architectes chargée de construire les pavillons Lachapelle et Mailloux: Crevier, Lemieux et Mercier; Dates de construction du bâtiment d'origine: 1922-1924; Date d'inauguration: 25 août 1924; Date de construction de la nouvelle aile sur la rue De Champlain: 1930; Dates de construction des pavillons Lachapelle et Mailloux: 1952-1960; Photographie prise vers 197
Hôpital Notre-Dame, 1560, rue Sherbrooke Est, Montréal, 1922-1924
No full textArchitectes du bâtiment d'origine: E. F. Stevens, W. J. Lee et Alfred-Hector Lapierre; Architectes chargés de construire une nouvelle aile sur la rue De Champlain: E. F. Stevens, W. J. Lee, Louis-Auguste et Pierre-Charles Amos; Firme d'architectes chargée de construire les pavillons Lachapelle et Mailloux: Crevier, Lemieux et Mercier; Dates de construction du bâtiment d'origine: 1922-1924; Date d'inauguration: 25 août 1924; Date de construction de la nouvelle aile sur la rue De Champlain: 1930; Dates de construction des pavillons Lachapelle et Mailloux: 1952-1960; Photographie prise vers 197
Hôpital Notre-Dame, 1560, rue Sherbrooke Est, Montréal, 1922-1924
No full textArchitectes du bâtiment d'origine: E. F. Stevens, W. J. Lee et Alfred-Hector Lapierre; Architectes chargés de construire une nouvelle aile sur la rue De Champlain: E. F. Stevens, W. J. Lee, Louis-Auguste et Pierre-Charles Amos; Firme d'architectes chargée de construire les pavillons Lachapelle et Mailloux: Crevier, Lemieux et Mercier; Dates de construction du bâtiment d'origine: 1922-1924; Date d'inauguration: 25 août 1924; Date de construction de la nouvelle aile sur la rue De Champlain: 1930; Dates de construction des pavillons Lachapelle et Mailloux: 1952-1960; Photographie prise vers 197
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