984 resultados para Upper Canada College, Toronto.
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The influence of salinity, temperature and prey availability on the marine migration of anadromous fishes was determined by describing the movements, habitat use and feeding behaviours of Arctic char (Salvelinus alpinus). The objectives were to determine whether char are restricted to the upper water column of the inter-/subtidal zones due to warmer temperatures. Twenty-seven char were tracked with acoustic temperature/pressure (depth) transmitters from June to September, 2008/2009, in inner Frobisher Bay, Canada. Most detections were in surface waters (0-3 m). Inter-/subtidal movements and consecutive repetitive dives (maximum 52.8 m) resulted in extreme body temperature shifts (-0.2-18.1 °C). Approximately half of intertidal and subtidal detections were between 9-13 °C and 1-3 °C, respectively. Stomach contents and deep diving suggested feeding in both inter-/subtidal zones. We suggest that char tolerate cold water at depth to capture prey in the subtidal zone, then seek warmer water to enhance feeding/digestion physiology.
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Through the processes of the biological pump, carbon is exported to the deep ocean in the form of dissolved and particulate organic matter. There are several ways by which downward export fluxes can be estimated. The great attraction of the 234Th technique is that its fundamental operation allows a downward flux rate to be determined from a single water column profile of thorium coupled to an estimate of POC/234Th ratio in sinking matter. We present a database of 723 estimates of organic carbon export from the surface ocean derived from the 234Th technique. Data were collected from tables in papers published between 1985 and 2013 only. We also present sampling dates, publication dates and sampling areas. Most of the open ocean Longhurst provinces are represented by several measurements. However, the Western Pacific, the Atlantic Arctic, South Pacific and the South Indian Ocean are not well represented. There is a variety of integration depths ranging from surface to 220m. Globally the fluxes ranged from -22 to 125 mmol of C/m**2/d. We believe that this database is important for providing new global estimate of the magnitude of the biological carbon pump.
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Mode of access: Internet.
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Cumulative index: v. 11-20, 1965. v. 21-30, 1970. v. 31-40, 1977.
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Editors: 1905-Sept. 14, 1914, E.B. Brown; Sept. 21, 1914-May 1915, L.S. Le Vernois; June 1915-1916, E.K. Williams
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Some vols. are preceded by Imperial Statutes, Orders in Council or treaties relating to or affecting Canada.
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Mode of access: Internet.
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"August 9, 1954"
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Pieter Bruegel the Elder; oil on oak
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Pieter Bruegel the Elder; oil on oak
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Pieter Bruegel the Elder; oil on wood
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Wang Meng; hanging scroll, ink on paper
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Thebes (deserted settlement), Egypt; 2 ft. 10 41/64 in.x 3 ft. 3 11/64 in.x 8 21/32 in.; painted plaster
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Mode of access: Internet.