lake trout stocking in small lakes factors affecting success

... harvest in lake trout sport fisheries on Precambrian Shield lakes 193 Charles H Olver, Daniel Nadeau, and Henri Fournier Chapter 12 Lake trout stocking in small lakes: factors affecting success ... Olver, C.H., 1995, Introduction of lake trout (Salvelinus namaycush) to inland lakes of Ontario, Canada: factors contributing to successful colonization, Journal of Great Lakes Research 21(Suppl ... in a deep, cold lake (Michaud) where it maintains its preferred temperature by staying in the hypolimnion or moving up and down in the water column In an extremely warm lake (Gullrock), the lake...

Ngày tải lên: 23/03/2014, 01:20

... harvest in lake trout sport fisheries on Precambrian Shield lakes Charles H Olver, Daniel Nadeau, and Henri Fournier Chapter 12 Lake trout stocking in small lakes: factors affecting success Michael ... thermoregulation in lake trout The graph shows the core body temperature of a lake trout in a deep, cold lake (Michaud) where it maintains its preferred temperature by staying in the hypolimnion or moving ... Olver, C.H., 1995, Introduction of lake trout (Salvelinus namaycush) to inland lakes of Ontario, Canada: factors contributing to successful colonization, Journal of Great Lakes Research 21(Suppl...

Ngày tải lên: 11/08/2014, 10:21

... Olver, C.H., 1995, Introduction of lake trout (Salvelinus namaycush) to inland lakes of Ontario, Canada — factors contributing to successful colonization, Journal of Great Lakes Research 21 (Suppl ... between lake trout in Lake Opeongo and those in Lake Louisa in Algonquin Park provided a widely touted example of this (Martin and Olver, 1980) Recent data, however, indicate that either feeding/growth ... M.K., 1993, Intralacustrine speciation of Salvelinus namaycush in Lake Superior: an investigation of genetic and morphological variation and evolution of lake trout in the Laurentian Great Lakes, ...

Ngày tải lên: 11/08/2014, 10:21

... and stocking Most of these lake trout were hatchery-origin fish, the survivors of past stockings Similar increases in lake trout abundance occurred in Lake Ontario in the late 1970s and in Lake ... by lake trout in the Great Lakes Approximately 330 million yearling and fingerling lake trout were released into the Great Lakes from 1950 to 2001, primarily into near-shore areas (Table 3.1) In ... recorded in Lake Erie in 1921, in Lake Michigan in 1936, in Lake Huron in 1937, and in Lake Superior in 1938 (Smith and Tibbles, 1980) By the 1950s, sea lampreys were very abundant in all the Great Lakes...

Ngày tải lên: 11/08/2014, 10:21

... determined the pattern and importance of drawdowns in 85 lake trout lakes A large number (50) of these lakes had drawdowns occurring after lake trout spawning Drawdowns occurred before lake spawning ... the 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 ... many lake trout spawning grounds observed in Ontario (MacLean et al., 1990) For the lake trout, spawning in very deep zones appears more of an exception than the rule because in Ontario lakes...

Ngày tải lên: 11/08/2014, 10:21

... epilimnia in smaller lakes to increase in thickness by to m as a result of a twofold increase in atmospheric CO2 levels Acidification of lakes by the input of mineral acids also results in increased ... nursery habitat, and stocking on the dynamics and productivity of lake trout populations in Ontario lakes, In Lake Trout Synthesis, Response to Stress Working Group, Ontario Ministry of Natural ... habitat, whereas lakes with only 10 to 25% of their volume as optimal habitat could lose 50% or more of the remaining habitat, putting the continued success of the lake trout populations in jeopardy...

Ngày tải lên: 11/08/2014, 10:21

... concentration distributions in 102 lake trout lakes and 394 lakes without lake trout in Ontario The distribution of TP in lake trout lakes in Quebec (Figure 7.3) was very similar to that in Ontario (Prairie, ... Total phosphorus concentration distributions in 125 Quebec lake trout lakes (from Prairie, 1994) 25 Lake Trout lakes Non -Lake Trout Lakes Percent of Lakes 20 15 10 >600 550-600 500-550 450-500 ... phosphorus concentration distributions in 293 lake trout lakes and 927 lakes with no lake trout in Ontario are shown in Figure 7.2 A total of 61% of the lake trout lakes surveyed had TP concentrations...

Ngày tải lên: 11/08/2014, 10:22

... transmission and mixing depth (e) in large and small lakes of northwestern Ontario Lakes

Ngày tải lên: 11/08/2014, 10:22

... future contaminant trends in predatory fish, including lake trout, in Boreal lakes Declines in atmospheric deposition, increased fishing pressure, and a reduced supply of DOC to lakes from their ... MeHg to lakes from their watersheds The acidification of lakes by atmospheric deposition of pollutants may be increasing Hg concentrations in lake trout in small Boreal lakes Experimental lake acidification ... limits Finally, some speculation is made about future trends of Hg in lake trout populations Mercury concentrations in lake trout populations in small Boreal lakes Mercury concentrations in lake trout...

Ngày tải lên: 11/08/2014, 10:22

... conditions in these lakes Finally, lakes with ANC values greater than 50 µeq L-1 are considered relatively insensitive to inputs of acidic deposition Results from the EMAP survey indicate that in the ... increased and ANC values decreased during winter, with maximum NO3- concentrations and minimum ANC values occurring during spring snowmelt Seasonal increases in NO3were also associated with increases ... concentrations of inorganic monomeric Al, in comparison to lakes with fish (Gallagher and Baker, 1990) Small, high-elevation lakes in the Adirondacks are more likely to be fishless than larger lakes at...

Ngày tải lên: 11/08/2014, 10:22

... the closure of lakes to fishing in alternate years This system was instituted on a number of lake trout and brook trout Salvelinus fontinalis lakes in Algonquin Park, Ontario, in response to ... seasons In Minnesota only one line is permitted in the winter on designated trout lakes, while in Ontario a one-line restriction in the winter applies to only one division and several individual lakes ... ice fishing on lake trout stocks in Ontario arose shortly after winter open seasons for lake trout were established in inland lakes in 1957 (Armstrong, 1961) Hughson (1961) reported that in the...

Ngày tải lên: 11/08/2014, 10:22

... uninvaded reference lakes (Vander Zanden et al., 1999) All of these lakes supported native, self-sustaining lake trout fisheries Like most small headwater lakes in the region, these lakes lacked pelagic ... invaders in individual Shield lakes By focusing on predicting occurrences and impacts in individual lakes, lakes that are most vulnerable to invaders can be identified This should be useful to lake ... Ontario lakes containing lake trout, bass were predicted but not observed (i.e., false presence) in 59 of these lakes Thus while bass not presently occur in these 59 lakes, the model indicates...

Ngày tải lên: 11/08/2014, 10:22

... harvest (kg ha−1) of lake trout in Michaud Lake during the winter and spring of 1998, the year the lake opened to fishing lake trout spawning sites were within 20 m of a stream inlet Our study showed ... 14.1 Whitepine Lake and Helen Lake Spawning Sites Spawning sites used Year Lake 15 18 41 44 39 52 41 41 Helen Lake 1997 1999 Sites producing alevins (%) Spawning habitat covered Egg Adjoining deposition ... Whitepine Lake The two principal study lakes, Whitepine and Michaud, have very simple fish communities dominated by small- bodied lake trout, typical of populations with a mainly planktivorous or insectivorous...

Ngày tải lên: 11/08/2014, 10:22

... types of lake trout lakes on the Shield The first is a southern group of very large lakes, including a large portion of the Laurentian Great Lakes In these massive, deep lakes, natural lake trout ... LTER lakes in 1981 and continues More information on the lakes, current research, and online data catalogue is available at http://limnosun.limnology.wisc.edu/ Sudbury area lakes Monitoring of lakes ... Molot, L.A., 2003, Lake trout (Salvelinus namaycush) habitat volumes and boundaries in Canadian Shield lakes, in Boreal Shield Watersheds: Lake Trout Ecosystems in a Changing Environment, Gunn,...

Ngày tải lên: 11/08/2014, 10:22

... Moreover, the increase in production potential, that is achievable, may be determined 2.1 Factors governing coffee production A number of studies have examined input factors affecting agricultural ... role in the well-being of people in the province In 2009, total coffee planted area in the province was 181,960 hectares accounting for about 40% of the total agricultural area in the province ... technical efficiency of coffee farming and to evaluate factors affecting the technical inefficiency in small holder coffee farms in the Krong Ana Watershed, Dak Lak province, Vietnam Results from this...

Ngày tải lên: 12/06/2014, 15:01

... improve the intestinal maladies following weaning Factors Associated With Small Intestinal Changes Pathogenic Bacteria Small Intestinal Changes The lumen (inside) lining of the small intestine is ... nonessential amino acid for swine However, glutamine has been recognized by the human health community to help maintain gastrointestinal growth during intravenous feeding and after gastrointestinal surgery ... (EGF), insulin-like growth factors (IGF-I and IGF-II), and insulin are hormones that influence growth of tissues, including the gastrointestinal tract All of these hormones have been found in sow...

Ngày tải lên: 29/06/2014, 01:20

... convenient sampling The author will interview people working in small and medium enterprises in Hanoi The interview was conducted during half a month After inputting and cleaning data, the total ... factors affecting e-commerce success in SMEs The proposed model is shown in Fig 2.11 Here, the factors are divided into Independent Factor that is Organizational, Management, Technological, Individual, ... identified the factors exerting influence on the adoption of Business-to- Business Electronic Commerce in SMEs Furthermore these factors have been combined into a model to describe and explain the drivers...

Ngày tải lên: 23/08/2014, 02:03

... 100.0% HaiPhong NinhBinh ThanhHoa Total The survey of 120 enterprises in the North of Vietnam (26 in Quang Ninh, 28 in Hai Phong, 14 in nam Dinh, 12 in Thai Binh, 16 in Ninh Binh and 24 in Thanh Hoa) ... enterprises in the North of Vietnam (26 in Quang Ninh, 28 in Hai Phong, 14 in nam Dinh, 12 in Thai Binh, 16 in Ninh Binh and 24 in Thanh Hoa) shows that: - enterprises in Quang Ninh are ranked ... aquaculture enterprises (26 in Quang Ninh, 28 in Hai Phong, 14 in Nam Dinh, 12 in Thai binh, 16 in Ninh Binh and 24 in Thanh Hoa) shows that:  25 enterprises in Quang Ninh are ranked at high level,...

Ngày tải lên: 23/08/2014, 02:03

... these factors in making their decision about adoption and try to improve those factors that are within their control 13 By increasing financial resources for adopting, implementing and supporting ... Summary of the findings The Factors Analysis were executed to graft groups and eliminate the items in factors, we achieved the following results In the factors analysis of SMEs‟ readiness to adopt, ... with maintaining domestic operations actively, Vietnam will definitely continue to receive more attentions from importers in a near future (Mr Vincent Wong, Senior Managing Director of Business...

Ngày tải lên: 09/05/2016, 16:44

... *Continuing in- depth investment, innovation of technology and equipment; mechanize and automate processing line by attracting foreign investment in order to rapidly approach advanced processing ... aquaculture industry in the north of Vietnam Based on the evaluation results in terms of capacity’ factors of enterprises in the provinces: Quangninh, HaiPhong, NamDinh, Thaibinh, Ninhbinh, Thanhhoa ... competitiveness between provinces in Northern Vietnam in aquaculture industry According to evaluating eight indicators : Financial Capability, intangible assets, equipment, marketing, production capacity,...

Ngày tải lên: 09/05/2016, 16:44