lake trout ecosystems in a changing environment

... Resources Canada, Ottawa Ecological Stratification Working Group, 1995, A National Framework for Canada Cat No A4 2–65/1996E, Agriculture and Agri-Food Canada and Environment Canada, Ottawa Fulton, ... (Picea glauca), balsam fir (Abies balsamea), and eastern white pine (Pinus strobes) Throughout the area, warmer and drier sites are dominated by jack pine (Pinus banksiana) and red pine (Pinus resinosa); ... Lake Nipigon Big Trout Lake Abitibi Plains Lake Timiskaming Lowland Algonquin -Lake Nipissing Southern Laurentians Rupert River Plateau Central Laurentians Northern Minnesota Adirondack Mountains...

Ngày tải lên: 23/03/2014, 01:20

... including Lakes Manitoba, Winnipeg, Dauphin, and Winnipegosis In addition to these Manitoban areas, at various stages of its life Lake Agassiz also extended well into Ontario and Saskatchewan in Canada ... Canada and the northern parts of the states of North Dakota and Minnesota in United States Additional proglacial lakes also appeared and disappeared north and west of Lake Agassiz as the Laurentide ... Survey of Canada, Natural Resources Canada, Ottawa Evans, D.O and Olver, C.H., 1995, Introduction of lake trout (Salvelinus namaycush) to inland lakes of Ontario, Canada: factors contributing to...

Ngày tải lên: 11/08/2014, 10:21

... basin, and finally eastward into Lake Barlow-Ojibway (Mandrak and Crossman, 1992) Lake Barlow-Ojibway extended across northeastern Ontario and northwestern Quebec, and drained into the Ottawa ... formation of giant proglacial lakes in and near what is now the Great Lakes basin between 14,500 and 7900 years ago (Dyke and Prest, 198 7a; Mandrak and Crossman, 1992) Lake Agassiz, which lasted ... 2.1) The Atlantic Coastal refugium existed along the coastal plain east of the Appalachians, south of present-day Long Island Smaller Atlantic Coastal Uplands and Grand Banks refugia were also present...

Ngày tải lên: 11/08/2014, 10:21

... typical approach used in the past Pulse stocking First, we propose stocking all available hatchery-reared lake trout allocated to a lake in a given year into one selected locality that has an abundance ... so low as not to be detectable or capable of sustaining a population Although lake trout at some locations have had difficulty attaining spawning age because of excessive fishing and sea lamprey ... Relative abundance of wild and hatchery lake trout caught in gill net surveys in U.S waters of Lake Superior and of all lake trout caught in waters

Ngày tải lên: 11/08/2014, 10:21

... spawning areas in the littoral zones of Lake aux Sables using a tarp (Benoît and Legault, 2002) led lake trout to abandon these areas and reproduce in the artificial deep-water spawning areas ... lake trout Introduction in Wisconsin’s Green Lake (Hacker, 1957) of a strain from a deep-spawning subpopulation from Lake Michigan provides an interesting example In this lake, lake trout spawn ... many factors affecting lake trout s adaptation in reservoirs (Machniak, 1975; Evans et al., 1991) Among the foregoing factors, drawdown is often pinpointed as the cause of the lake trout' s adaptation...

Ngày tải lên: 11/08/2014, 10:21

... H.E., in press, Predicting optimal habitat boundaries for lake trout (Salvelinus namaycush Walbaum) in Canadian Shield lakes, Canadian Journal of Fisheries and Aquatic Sciences Dillon, P.J and ... 37 lakes in the Dorset area used to test/develop their model, Dillon et al (in press) calculated that a 1-m increase in transparency would result in an increase in Z10 of ca m Following a 2-m increase ... both lake morphometry and nutrient status For example, the optimal habitat model used for lake trout management in inland lakes in southeastern Ontario (Ontario Ministry of the Environment and...

Ngày tải lên: 11/08/2014, 10:21

... determining admissible and dangerous levels of phosphorus loading in lakes and also to Schindler’s (1971) index for predicting TP loading to lakes from lake area, catchment area, and lake volume ... Proceedings 23:258–264 Dillon, P.J., Clark, B.J., and Molot, L .A. , 2003, Predicting optimal habitat boundaries for lake trout (Salvelinus namaycush Walbaum) in Canadian Shield lakes, Canadian Journal ... pertaining to phosphorus and salmonids in particular The available nutrient data demonstrate that lake trout lakes are typically oligotrophic, with 85% of those in Ontario having TP concentrations...

Ngày tải lên: 11/08/2014, 10:22

... which alone and in combination can degrade the habitat required by lake trout and their prey Such changes are particularly likely in small lakes, where even small declines in habitat can threaten ... for lake trout (Salvelinus namaycush Walbaum) in Canadian Shield lakes, Canadian Journal of Fisheries and Aquatic Sciences (in press) Dillon, P.J and Molot, L .A. , 1997, Dissolved organic and inorganic ... mentioned above for acid lakes At least in the early stages of climate change, effects are smaller than those caused by acidification (Schindler et al., 199 6a, b) In general, climate and hydrology affect...

Ngày tải lên: 11/08/2014, 10:22

... Hg in lake trout was positively related to lake area in a study where the ratio of catchment to lake area was not kept constant as in Bodaly et al (1993) Lakes with proportionately larger catchment ... Cabana, G., Tremblay, A. , Kalff, J., and Rasmussen, J.B., 1994, Pelagic food chain structure in Ontario lakes: a determinant of mercury levels in lake trout (Salvelinus namaycush), Canadian Journal ... (Perca flavescens), Water Pollution Research Journal of Canada 28: 217–236 Health and Welfare Canada, 1984, Methylmercury in Canada, Volume 2, Health and Welfare Canada, Ottawa, Ontario Hesslein,...

Ngày tải lên: 11/08/2014, 10:22

... NO3- increased and ANC decreased during fall, coinciding with increased flow and decreased plant activity Nitrate concentrations increased and ANC values decreased during winter, with maximum ... affecting forested landscapes and aquatic ecosystems in North America, Europe, and Asia This complex problem is an example of a new class of environmental issues that are multiregional in scale and ... Environmental Contamination and Toxicology 18: 29 Environment Canada, 1998, Annual Report on the Federal-Provincial Agreements for the Eastern Canada Acid Rain Program, Minister of Public Works and...

Ngày tải lên: 11/08/2014, 10:22

... and partly outside Boundary Waters Canoe Area adjacent to Ontario border have winter seasons All year in Finger Lakes, Lake Champlain Ice fishing permitted in designated trout waters Manitoba ... found that fishing effort is the most important factor affecting lake trout harvest in Ontario lakes, accounting for 73% of the annual variation in angler catch among lakes Evans et al (1991), in ... die Anglers with tags have the choice of releasing a fish or keeping and tagging it and applying it to their seasonal or annual quota An individual tag-and-quota system for lake trout has been in...

Ngày tải lên: 11/08/2014, 10:22

... uptake by lake trout, Salvelinus namaycush, relative to age, growth, and diet in Tadenac Lake with comparative data from other Precambrian Shield lakes, Canadian Journal of Fisheries and Aquatic ... using diet data and stable isotopes indicated that lake trout are linked to the pelagic food web in lakes containing pelagic prey fish such as rainbow smelt, lake herring Coregonus artedi, and ... reduce their spread into new waters The available evidence indicates that lakes occurring in the same drainage as other smelt lakes as well as lakes with road access and cottage development should...

Ngày tải lên: 11/08/2014, 10:22

... relative abundance of lake trout in the lake In the fall (October to 30, 1997) a spawning assessment of adult lake trout in Michaud Lake was conducted, and 220 adults were fin marked and released ... population of lake trout developed in Whitepine Lake by 1990 In Michaud Lake the native fish disappeared before natural recruitment resumed, and the hatchery stocking that began in 1984 was maintained ... within the wilderness setting of Killarney Provincial Park and was used as an alternate lake to test the habitat manipulation technique It has good water quality, a native reproducing lake trout...

Ngày tải lên: 11/08/2014, 10:22

... (Northeastern Ontario) (continued) Lake name Allan Allen Allen Alma Almonte Aloft (Mountain) Alphretta (Paradise) Alto Anahareo Anelia Anima Nipissing Anjigami Antrim Anvil Anvil (North Anvil) Applesauce ... 5 ONTARIO (Northeastern Ontario) Lake name Aaron Abbott Acheson Achigan (Bass) Acid Adelaide Admiral (Duck) Affleck (Upper Megisan) Agawa Station Aileen Airport Alces Alexander Alexander Alice ... (EMAN; www.eman-rese.ca) currently provides a coordinating service to support data sharing, communication, and training in environmental and ecological monitoring and to assist in preparing state-of-the-resource...

Ngày tải lên: 11/08/2014, 10:22

... UV-radiation and the long-range transported contaminants in arctic and alpine regions are stress factors that challenge terrestrial and aquatic ecosystems The large natural variation in the physical parameters ... photosynthetic active radiation (PAR) may also cause a suite of cellular damages (Hessen Chap 13) Vincent et al (Chap 14) show that arctic, antarctic and alpine aquatic ecosystems are particularly vulnerable ... central Arctic have warmed by 0.5°C), temperatures in Canada’s Hudson Bay and in Greenland, particularly in the Davis Strait area have decreased (Chapman and Walsh 1993), suggesting that climate...

Ngày tải lên: 23/03/2014, 01:20

... Protecting children’s health in a changing environment Role of international financing mechanisms Climate change is a great challenge and a threat to health, but also an opportunity Structural transformation ... Ministerial Conference A range of environmental risk factors threatens health: inadequate water and sanitation, unsafe home and recreational environments, lack of spatial planning for physical ... implementation; • scaling up existing financial mechanisms; • bringing in new and innovative sources of finance; and • building capacities to secure, absorb and deploy environmental financing The...

Ngày tải lên: 22/03/2014, 16:22

... within the past months, especially “family financial problems, parental abuse of alcohol, parental arguing and fighting, changing schools, serious accidents, and death in the family.”22 Because ... counseling and testing HIV/AIDS stigma and fear of the lifethreatening implications of an HIV diagnosis—as well as a lack of awareness of “teen-friendly” testing facilities—may 0 The Family Advocacy ... Health and Human Services Health Resources and Services Administration HIV/AIDS Bureau Editor Richard Seaton Impact Marketing and Communications All information herein is in the public domain...

Ngày tải lên: 28/03/2014, 14:20

... United States United Kingdom Italy France China Australia Japan Russian Federation Canada Brazil Germany Turkey South Korea India South Africa Indonesia Mexico Argentina G20 countries' total 2010b) ... a) Based on banks contained in respective countries' Datastream bank indices Note that such data are not available for Saudi Arabia b) From 1-Jan-10 to 29-Jul-10 c) Based on banks contained in ... RISKS AHEAD FOR THE FINANCIAL INDUSTRY IN A CHANGING INTEREST RATE ENVIRONMENT A Current financial market outlook and risks Selected recent developments Financial markets are searching for...

Ngày tải lên: 15/03/2014, 01:20

... et al., University of Manitoba, Canada Buresova et al., Alterra Wageningen, Netherlands Zafar et al., Wageningen University, Netherlands Attenuation and dynamics of pharmaceuticals in a German ... photocatalysis Meierjohann et al., Åbo University, Finland Seasonal Variations of Pharmaceuticals in a River /Lake System in Eastern Finland Luft et al., Federal Institute of Hydrology (BfG), Germany ... review and evaluation of plant protection product ranking tools used in agriculture Session “Environmental chemistry: Detecting emerging contaminants in a changing environment. ” (Chairs: Tao Liu,...

Ngày tải lên: 21/06/2014, 01:20

... Environment Agency Managing the environment in a changing climate The action we are taking We are taking action to ensure we have a sound evidence base and that the latest research and engineering evidence ... Environment Agency Managing the environment in a changing climate 18 • • • planning authorities to ensure that spatial strategies (local, sub-national and the Wales Spatial Plan) account for climate ... a longer timescale there is less evidence of any trends Animal and plant species are moving and changing in response to increasing temperatures These changes are clearest in marine and coastal...

Ngày tải lên: 28/06/2014, 23:20