Download or read book Spawning Habitat and Reproductive Strategies of Lake Trout Salvelinus Namaycush in a Northern Boreal Lake written by David Callaghan and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Model to Link Habitat Supply to Population Dynamics for Lake Trout Salvelinus Namaycush Populations in Western Lake Superior written by John Netto (Ph. D.) and published by . This book was released on 2006 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of Spawning Habitat of Lake Trout Salvelinus Namaycush and Muskellunge Esox Masquinongy in Dale Hollow Reservoir written by Donald Wayne Hubbs and published by . This book was released on 1988 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Investigation of Spawning Habitat Conditions and Reproduction of Lake Trout in Eastern Lake Michigan Near Port Sheldon Michigan written by John A. Dorr and published by . This book was released on 1981 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Brook Trout Salvelinus Fontinalis Spawning Habitat in a Boreal Stream written by Jan Franssen and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The reproductive success of brook trout (Salvelinus fontinalis) populations, like those of other salmonid species, is dependent on the availability and quality of spawning/incubation habitats. For brook trout in particular substrate composition and groundwater-hyporheic flow characteristics are key abiotic factors influencing both the suitability of lotic spawning habitats and the survival of embryos nested within these habitats. Egg-to-emergence survival has been shown to be negatively related to substrate fine sediment concentrations and positively related to interstitial flow velocity. Both substrate composition (through filtering effects) and interstitial flow are also thought to influence the susceptibility of egg pockets to fine sediment infiltration. The objectives of this doctoral study are to clarify the roles of groundwater and hyporheic flow in brook trout redd site selection; as well as the effect of substrate composition and interstitial flow on...
Download or read book Boreal Shield Watersheds written by John Gunn and published by CRC Press. This book was released on 2003-08-27 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Boreal Shield Watersheds: Lake Trout Ecosystems in a Changing Environment brings together the work of a renowned international group of scientists who specialize in aquatic science and environmental management. They explore the functioning of Boreal Shield ecosystems, focusing on the lake trout, the classic coldwater species of northern glaciated l
Download or read book Food Habits Reproductive Biology and Lamprey Scarring of Planted Lake Trout Salvelinus Namaycush in the Inshore Waters of Lake Michigan at Ludington Michigan written by Thomas L. Chiotti and published by . This book was released on 1973 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lake Trout S a l v e l i n u s N a m a y c u s h Spawning Habitat on Clay Banks Reef Northwestern Lake Michigann written by Thomas A. Edsall and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamics of Reproduction by Hatchery origin Lake Trout Salvelinus Namaycush in Lake Ontario written by David Lyle Perkins and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1994 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Managing Recreational Lake Trout Salvelinus Namaycush Fisheries for the Future written by Melissa Lenker and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The abundance and size structure of North America's recreational fisheries have declined and continue to be threatened by overfishing, aquatic invasive species, and environmental degradation. High quality recreational fisheries are thus rare and economically valuable resources. Some fish species are more sensitive to exploitation than other species, and require careful management to maintain the abundance and size structure associated high quality recreational fisheries. The coldwater fish Lake Trout Salvelinus namaycush is one such popular, economically valuable species which must be managed in accordance to its slow growth and late maturity. With a few exceptions, southern Lake Trout fisheries are heavily exploited, and previously unexploited northern populations are facing increased fishing pressure due to the increased popularity of northern tourism and unprecedented access to remote lakes. This coldwater fish species is additionally threatened by climate change: warming temperatures are predicted to extirpate Lake Trout from low elevations and the southern extent of their range. In Chapter I, we develop an age-structured model to assess the effects of six common management strategies (catch and release, trophy, minimum and maximum size limits, slot limits) on Lake Trout abundance, catch per unit effort, and harvest over a range of angler effort on Follensby Pond, an unexploited 393 hectare lake in the Adirondacks region of New York State. The results of Chapter I help assess the risks of different management options and match regulations to management goals. In Chapter II, we use five decades of historical Lake Trout spawning records and climate data from a 1,993 hectare lake in upstate New York to determine the effect of Lake Trout's plastic response to temperature on egg quality and the timing of the spawning period. The results presented in Chapter II add to the growing body of literature exploring Lake Trout spawning phenology and the sub-lethal effects of climate change on thermally sensitive coldwater fish species. Management agencies can use the results of Chapters I and II to assess how previously unfished populations should be managed to maximize social and economic benefits, and whether current Lake Trout exploitation rates are sustainable given the unknown impact of climate change on Lake Trout reproductive capacity." --
Download or read book The Population Dynamics of Lake Trout Salvelinus Namaycush in Lake Manitou in Relation to the Planting and Spawn taking Operation written by B. A. Henderson and published by Ontario, Ministry of Natural Resources, Fisheries Branch. This book was released on 1982 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spawning Habits Location and Timing Seasonal Movements Length Weight and Sex Composition and Forage Base of Salvelinus Namaycush Lake Trout in the Ugashik Lake Drainage Alaska Peninsula National Wildlife Refuge Alaska written by Jason R. Valliere and published by . This book was released on 2002 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial and Thermal Ecology of Lake Trout salvelinus Namaycush in Lake Erie written by Tyler R. Funnell and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rehabilitation of lake trout (Salvelinus namaycush), which historically was the coldwater apex predator of much of the Laurentian Great Lakes, is a priority for fishery management agencies in the region. In Lake Erie, the shallowest and southern-most Great Lake, successful rehabilitation of lake trout has been hindered by limited wild recruitment, possibly related to the lake's warm temperatures and restricted oxythermal habitat. I used acoustic telemetry tracking technology to investigate how lake trout spatial and thermal habitat use varies seasonally in Lake Erie to better understand whether limited recruitment could be caused by thermal conditions in the lake. As expected, lake trout were restricted to the offshore region of the eastern basin of Lake Erie during summer stratification. During fall, lake trout tended to occupy the southern nearshore region of the eastern basin, suggesting the importance of focusing spawning habitat restoration in this part of the lake. Tagged fish dispersed long distances at much higher frequencies than other Great Lakes populations of lake trout. Lake trout in Lake Erie occupied thermal habitat similar to other Great Lakes populations during summer stratification. Following destratification in fall, fish were exposed to warm temperatures, in some years for extended periods. Lake trout hatchery strains of Finger Lakes, NY, origin occupied similar summer temperatures and warm temperatures for more days during fall than Great Lakes origin strains, contrary to findings from Lakes Huron and Ontario. These results reveal behaviors that can inform management of lake trout in Lake Erie and throughout the Great Lakes and could begin to explain recruitment failure observed in Lake Erie.
Download or read book Biodiversity in Arctic Lake Trout Salvelinus Namaycush written by Benjamin Kissinger and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biodiversity within species is influenced by both adaptation and acclimatization in order to exploit a range of environments. Taxa within the genus Salvelinus are considered some of the most diverse vertebrate species on earth particularly Arctic char, Salvelinus alpinus, and lake trout, Salvelinus namaycush, due to various morphotypes, ecotypes, and life history strategies documented. The goal of this thesis was to describe factors influencing the formation and maintenance of biodiversity within species, using lake trout within the brackish waters of Husky Lakes, NT. To accomplish the goal I 1) determined life history types present within the Husky Lakes drainage basin (HLDB); 2) assessed how differences in rearing environment influenced physiology; 3) assessed differences in growth rates and longevity among life history types; and 4) assessed genetic structure among life history types and sampling locations. My data indicate that three life history types are present within the HLDB, freshwater resident, semi-anadromous, and brackish-water resident, suggesting two discrete early rearing environments are used (fresh and brackish water). Assessment of rearing in fresh (0 psu) or brackish water (5 psu) indicates that lake trout reared in brackish water out performed those raised in fresh water when transferred to 20 psu salt water. Additionally, brackish-water residents grew faster and lived longer than did semi-anadromous and freshwater resident lake trout in the HLDB. Also, brackish-water residents were genetically differentiated from sympatric semi-anadromous life history types suggesting segregation in spawning habitat. These findings are the first documentation of a brackish-water resident life history type within lake trout and one of only a few within salmonids. This novel life history type appears to be influenced by both phenotypic plasticity and local adaptation to brackish-water environments allowing for faster growth rates, increased longevity, and a larger abundance in Husky Lakes. Within this thesis I expanded the spectrum of known life history diversity within lake trout and Salvelinus, demonstrated that lake trout are more saline tolerant that originally documented, identified mechanisms that aid in forming and maintaining biodiversity, and contributed to the belief that lake trout are one of the most diverse vertebrates on earth.
Download or read book An Evaluation of Lake Trout Spawning Habitat Characteristics and Methods for Their Detection written by Canada. Department of Fisheries and Oceans and published by Burlington, Ont. : Fisheries and Oceans, Canada. This book was released on 1994 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Evaluation of Putative Lake Trout Salvelinus Namaycush Spawning Sites in the Great Lakes written by and published by . This book was released on 1990 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Native stocks of lake trout were severely depleted in much of Lake Superior and became virtually extinct in Lakes Michigan, Huron, Erie and Ontario during the 1940-50s. The Great Lakes Fisheries Commission has developed a series of 7 goals for Lake Superior, one of which was the restored use of historical spawning reefs by lake trout. This assumed an ability to identify characteristics of spawning locations. To determine common factors among spawning sites, published material of lake trout spawning in the Great Lakes was reviewed and spawning sites were identified and enumerated, depth and substrate characteristics were summarized, and information sources were evaluated.
Download or read book Observations of Lake Trout Salvelinus Namaycush Spawning Behaviours in Low PH Lakes Near Sudbury Ontario written by J. M. (John Maxwell) Gunn and published by . This book was released on 1987 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
