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Journal articles on the topic 'Trout Lake'

Author: Grafiati

Published: 4 June 2021

Last updated: 14 February 2022

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1

Donald, David B., and David J. Alger. "Geographic distribution, species displacement, and niche overlap for lake trout and bull trout in mountain lakes." Canadian Journal of Zoology 71, no. 2 (1993): 238–47. http://dx.doi.org/10.1139/z93-034.

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Indigenous lacustrine populations of bull trout (Salvelinus confluentus) and lake trout (S. namaycush) are spatially separated within the southern part of the zone of distributional overlap (northern Montana, southwestern Alberta, and east-central British Columbia). In this area, lake trout occurred primarily in mountain lakes of 1032–1500 m elevation, while bull trout were found primarily in lakes between 1500 and 2200 m. Introductions of lake trout in the twentieth century and data obtained from beyond the study area indicated that both fishes can establish significant allopatric populations

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2

Sellers, Todd J., Brian R. Parker, David W. Schindler, and William M. Tonn. "Pelagic distribution of lake trout (Salvelinus namaycush) in small Canadian Shield lakes with respect to temperature, dissolved oxygen, and light." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 1 (1998): 170–79. http://dx.doi.org/10.1139/f97-232.

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The distribution of lake trout (Salvelinus namaycush) with respect to water temperature, dissolved oxygen, and light intensity was surveyed in three small Canadian Shield lakes at the Experimental Lakes Area, northwestern Ontario. Based on hydroacoustic and gillnet surveys, there was considerable variation among lakes in temperatures occupied by lake trout during the summer. During the day, lake trout were concentrated at 4-8°C in Lake 375, broadly distributed from 6 to 15°C in Lake 442, and concentrated in the epilimnion at 19°C in Lake 468. At night, lake trout in all lakes occupied epilimne

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3

Matuszek, John E., Donna L. Wales, and John M. Gunn. "Estimated Impacts of SO2 Emissions from Sudbury Smelters on Ontario's Sportfish Populations." Canadian Journal of Fisheries and Aquatic Sciences 49, S1 (1992): 87–94. http://dx.doi.org/10.1139/f92-303.

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Impacts of acidification on the major sportfish species in Ontario (lake trout (Salvelinus namaycush), brook trout (S. fontinalis), smallmouth bass (Micropterus dolomieu), and walleye (Stizostedion vitreum)) were estimated from the results of extensive water quality surveys conducted during the period 1978–85. Local impacts, within the 17 000 km2 area most affected by emissions from Sudbury smelters, were also estimated and compared with the provincial values. The estimated numbers of acidic lakes in Ontario in which viable sportfish populations have disappeared were 119 lake trout lakes (5.1%

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4

Merrick, Glenn W., Anne E. Hershey, and Michael E. McDonald. "Lake Trout (Salvelinus namaycush) Control of Snail Density and Size Distribution in an Arctic Lake." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 3 (1991): 498–502. http://dx.doi.org/10.1139/f91-064.

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In arctic Alaskan lakes the density and size distribution of the snail Lymnaea elodes appear to be greatly affected by the presence or absence of lake trout (Salvelinus namaycush). Snail densities were much lower and size distributions depressed in lakes where trout were present. During the summer of 1986, lake trout were introduced into an arctic lake to test the effects of their predation on the dominant snail Lymnaea elodes. During July and early August, snail densities in the experimental lake remained stable in the deepwater areas of the lake, but increased significantly in the deepwater

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5

Paterson, Gordon, D. Michael Whittle, Kenneth G. Drouillard, and G. Douglas Haffner. "Declining lake trout (Salvelinus namaycush) energy density: are there too many salmonid predators in the Great Lakes?" Canadian Journal of Fisheries and Aquatic Sciences 66, no. 6 (2009): 919–32. http://dx.doi.org/10.1139/f09-048.

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This study used long-term biomonitoring data on lake trout ( Salvelinus namaycush ) collected from Lakes Erie, Ontario, Huron, and Superior between 1995 and 2004 to investigate latitudinal and temporal trends in body mass and energy density of this top predator in the Great Lakes. Lake trout average body mass and energy density were observed to have negative relationships with latitude that primarily reflected patterns in lake productivities. Temporal declines in energy density occurred for >80% of all lake trout age classes collected from each of the four lakes between 1995 and 2004. von B

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6

Happel, Austin, Jory L. Jonas, Paul R. McKenna, Jacques Rinchard, Ji Xiang He, and Sergiusz J. Czesny. "Spatial variability of lake trout diets in Lakes Huron and Michigan revealed by stomach content and fatty acid profiles." Canadian Journal of Fisheries and Aquatic Sciences 75, no. 1 (2018): 95–105. http://dx.doi.org/10.1139/cjfas-2016-0202.

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Despite long-term efforts to restore lake trout (Salvelinus namaycush) populations in the Great Lakes, they continue to experience insufficient recruitment and rely on hatchery programs to sustain stocks. As lake trout reproductive success has been linked to diets, spatial heterogeneity in diet compositions is of interest. To assess spatial components of adult lake trout diets, we analyzed stomach contents and fatty acid profiles of dorsal muscle collected throughout Lake Michigan and along Lake Huron’s Michigan shoreline. Lake trout from Lake Huron were generally larger in both length and mas

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7

Kaufman, Scott D., Ed Snucins, John M. Gunn, and Wayne Selinger. "Impacts of road access on lake trout (Salvelinus namaycush) populations: regional scale effects of overexploitation and the introduction of smallmouth bass (Micropterus dolomieu)." Canadian Journal of Fisheries and Aquatic Sciences 66, no. 2 (2009): 212–23. http://dx.doi.org/10.1139/f08-205.

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In lake trout ( Salvelinus namaycush ) lakes of northeastern Ontario, Canada, aerial surveys of fishing activity on individual lakes (N = 589) and quantitative gillnet surveys (N = 65) were used to assess the effects of road access on angling effort and the presence of introduced smallmouth bass ( Micropterus dolomieu ). Angling effort, particularly during the open-water season, was highest and often exceeded estimated sustainable levels on lakes with good road access. Approximately 25% of the remote lakes also received excessive pressure during the winter season. Angler numerical responses to

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8

Trippel, Edward A., and F. William H. Beamish. "Multiple Trophic Level Structuring in Salvelinus–Coregonus Assemblages in Boreal Forest Lakes." Canadian Journal of Fisheries and Aquatic Sciences 50, no. 7 (1993): 1442–55. http://dx.doi.org/10.1139/f93-165.

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Hypolimnetic trophic interactions were examined among lake trout (Salvelinus namaycush), cisco (Coregonus artedi), zooplankton, and macroinvertebrates in six northwestern Ontario lakes varying sevenfold in conductivity. Faster growth and larger body size of lake trout in high-conductivity lakes were associated with larger meal sizes, earlier entry of cisco into their diet, and consumption of relatively few, large-bodied prey. Cisco preyed on zooplankton and macroinvertebrates. Cisco were abundant, large bodied, and fast growing in high-conductivity lakes. In one low-conductivity lake (Greenwic

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9

Swanson, Heidi K., Karen A. Kidd, John A. Babaluk, et al. "Anadromy in Arctic populations of lake trout (Salvelinus namaycush): otolith microchemistry, stable isotopes, and comparisons with Arctic char (Salvelinus alpinus)." Canadian Journal of Fisheries and Aquatic Sciences 67, no. 5 (2010): 842–53. http://dx.doi.org/10.1139/f10-022.

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In the family Salmonidae, lake trout ( Salvelinus namaycush ) are considered the least tolerant of salt water. There are, however, sporadic reports of lake trout in coastal, brackish habitats in the Canadian Arctic. Otolith microchemistry analyses conducted on lake trout and Arctic char ( Salvelinus alpinus ) from four Arctic lakes in the West Kitikmeot region of Nunavut, Canada, revealed that 37 of 135 (27%) lake trout made annual marine migrations. Anadromous lake trout were in significantly better condition (K = 1.17) and had significantly higher C:N ratios (3.71) than resident lake trout (

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10

Conlon, Michael, John M. Gunn, and J. Robert Morris. "Prediction of Lake Trout (Salvelinus namaycush) Presence in Low-Alkalinity Lakes near Sudbury, Ontario." Canadian Journal of Fisheries and Aquatic Sciences 49, S1 (1992): 95–101. http://dx.doi.org/10.1139/f92-304.

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Surveys of 30 low-alkalinity lake trout (Salvelinus namaycush) lakes near Sudbury, Ontario, were conducted to assess factors that affect lake trout presence under acidification stress. At the time of the surveys the lakes varied widely in pH (4.5–6.9), concentrations of toxic metals (Al 12–300 μg∙L−1), and the status of lake trout populations (extinct–abundant). Fish community structure (species richness, species assemblages) reflected and was readily predicted from measured water quality variables. A PCA factor composed of pH, alkalinity, and conductivity was the variable that best predicted

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11

Koel, Todd M., Colleen R. Detjens, and Alexander V. Zale. "Two Ocean Pass: An Alternative Hypothesis for the Invasion of Yellowstone Lake by Lake Trout, and Implications for Future Invasions." Water 12, no. 6 (2020): 1629. http://dx.doi.org/10.3390/w12061629.

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Preventing the interbasin transfer of aquatic invasive species is a high priority for natural resource managers. Such transfers can be made by humans or can occur by dispersal through connected waterways. A natural surface water connection between the Atlantic and Pacific drainages in North America exists at Two Ocean Pass south of Yellowstone National Park. Yellowstone cutthroat trout Oncorhynchus clarkii bouvieri used this route to cross the Continental Divide and colonize the Yellowstone River from ancestral sources in the Snake River following glacial recession 14,000 bp. Nonnative lake tr

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12

Kwain, W., and J. R. M. Kelso. "Risk to Salmonids of Water Quality in the Turkey Lakes Watershed as Determined by Bioassay." Canadian Journal of Fisheries and Aquatic Sciences 45, S1 (1988): s127—s135. http://dx.doi.org/10.1139/f88-277.

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Batchawana Lake, the headwater lake in the Turkey Lakes Watershed, was devoid offish. Although a number of factors could cause this fishless state, we conducted in situ studies to partially address conditions related to lake acidification. The spring pH depression did not induce significant, consistent mortality to rainbow trout (Salmo gairdneri) or lake trout (Salvelinus namaycush) caged in situ. In 1981, however, considerable mortality occurred to fish caged in Batchawana Lake during or immediately following the maximum spring pH depression. In the remaining lakes, mortality occurred later i

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13

Guy, Christopher S., Thomas E. McMahon, Wade A. Fredenberg, Clinton J. Smith, David W. Garfield, and Benjamin S. Cox. "Diet Overlap of Top-Level Predators in Recent Sympatry: Bull Trout and Nonnative Lake Trout." Journal of Fish and Wildlife Management 2, no. 2 (2011): 183–89. http://dx.doi.org/10.3996/012011-jfwm-004.

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Abstract The establishment of nonnative lake trout Salvelinus namaycush in lakes containing lacustrine–adfluvial bull trout Salvelinus confluentus often results in a precipitous decline in bull trout abundance. The exact mechanism for the decline is unknown, but one hypothesis is related to competitive exclusion for prey resources. We had the rare opportunity to study the diets of bull trout and nonnative lake trout in Swan Lake, Montana during a concomitant study. The presence of nonnative lake trout in Swan Lake is relatively recent and the population is experiencing rapid population growth.

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14

Minns, Charles K., James E. Moore, Brian J. Shuter, and Nicholas E. Mandrak. "A preliminary national analysis of some key characteristics of Canadian lakes." Canadian Journal of Fisheries and Aquatic Sciences 65, no. 8 (2008): 1763–78. http://dx.doi.org/10.1139/f08-110.

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Knowledge of Canada’s lakes is needed to manage environmental stresses. Lake inventory and lake feature databases were used to build a national impact assessment template and assess regional typology. There are ~910 400 lakes with area ≥ 0.1 km2(10 ha), 37% of the Earth’s total. Lake features (number of lakes by size class, maximum depth, mean–maximum depth ratio, Secchi depth, pH, and total dissolved solids) were modeled regionally by secondary watershed (SWS) using linear regression models. Lake trout ( Salvelinus namaycush ) occurrence was analyzed as a cofactor to highlight regional links

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15

Mohr, L. C., K. H. Mills, and J. F. Klaverkamp. "Survival and Development of Lake Trout (Salvelinus namaycush) embryos in an Acidified Lake in Northwestern Ontario." Canadian Journal of Fisheries and Aquatic Sciences 47, no. 2 (1990): 236–43. http://dx.doi.org/10.1139/f90-026.

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Survival and development of lake trout (Salvelinus namaycush) embryos from L223 in the Experimental Lakes Area, northwestern Ontario, were evaluated from 1979 (pH 5.6) to 1982 (pH 5.1). Survival of L223 embryos was not significantly correlated to lake pH during experimental acidification. Also, embryo mortality in L223 was not significantly different from that of lake trout embryos in two reference lakes, L224 and L468. Survival of L223 embryos was not improved when they were incubated in nonacidified lakes. Embryo mortality was highest in all lakes (33–81%) within 15 d of fertilization. Morta

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Rostovtsev, Alexander Alekseevich, Vladimir Ivanovich Romanov, and Elena Aleksandrovna Interesova. "Distribution of trout in the Upper Ob basin." Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries), no. 6 (June 1, 2021): 32–41. http://dx.doi.org/10.33920/sel-09-2106-03.

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Rainbow trout Oncorhynchus mykiss (Walbaum, 1792) and brown trout Salmo trutta Linnaeus, 1758 are popular aquaculture species worldwide. At the same time, it is known that when these species enter natural water bodies, they are able to form self-reproducing populations and cause significant damage to native fauna due to food competition, hybridization with native species, and predation. In the basin of the Upper Ob in the second half of the twentieth century, there was not only a large aquaculture farm specializing in trout but also work was carried out to introduce trout into natural water bo

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Trippel, Edward A., and F. William H. Beamish. "Lake Trout (Salvelinus namaycush) Growth Potential Predicted from Cisco (Coregonus artedii) Population Structure and Conductivity." Canadian Journal of Fisheries and Aquatic Sciences 46, no. 9 (1989): 1531–38. http://dx.doi.org/10.1139/f89-195.

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Trophic dynamics between lake trout (Salvelinus namaycush) and cisco (Coregonus artedii) were examined in a set of 10 northwestern Ontario lakes that ranged in conductivity by nearly an order of magnitude. Diets revealed the possibility of interspecific competition for invertebrate prey prior to initiation of piscivory by lake trout at approximately 200 mm fork length (FL). Von Bertalanffy growth equations (based on otolith ages) were used to estimate time to attain this length (1.4–3.0 yr). Contrary to anticipated results, lake trout reached this size more rapidly in lakes with high cisco abu

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Zimmerman, Mara S., Stephanie N. Schmidt, Charles C. Krueger, M. Jake Vander Zanden, and Randy L. Eshenroder. "Ontogenetic niche shifts and resource partitioning of lake trout morphotypes." Canadian Journal of Fisheries and Aquatic Sciences 66, no. 6 (2009): 1007–18. http://dx.doi.org/10.1139/f09-060.

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Resource polymorphisms are widely observed in fishes; however, ontogenetic contributions to morphological and ecological differences are poorly understood. This study examined whether ontogenetic changes in niche partitioning could explain morphological and buoyancy differences between lake trout ( Salvelinus namaycush ) morphotypes in Great Slave Lake (Northwest Territories, Canada). Morphometric analysis, buoyancy, capture depth, diet, and stable isotope data were used in concert to determine whether (i) differences occur in small, as well as large, lake trout, (ii) ontogenetic changes in mo

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Munro, Andrew R., Thomas E. McMahon, and James R. Ruzycki. "Natural chemical markers identify source and date of introduction of an exotic species: lake trout (Salvelinus namaycush) in Yellowstone Lake." Canadian Journal of Fisheries and Aquatic Sciences 62, no. 1 (2005): 79–87. http://dx.doi.org/10.1139/f04-174.

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Exotic species invasions pose a pervasive threat to aquatic ecosystems worldwide, yet fundamental questions about the geographic origin and timing of invasions or introductions are frequently difficult to answer. We used natural chemical markers (Sr:Ca ratios) in otoliths to identify probable source and date of introduction of exotic lake trout (Salvelinus namaycush) into Yellowstone Lake, Wyoming, USA. Otolith Sr:Ca ratios were significantly different among lake trout known to have reared in three different Yellowstone National Park lakes (Yellowstone, Heart, and Lewis lakes) and showed littl

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Kennedy, Patrick J., Paul J. Blanchfield, Karen A. Kidd, Michael J. Paterson, Cheryl L. Podemski, and Michael D. Rennie. "Changes in the condition, early growth, and trophic position of lake trout (Salvelinus namaycush) in response to an experimental aquaculture operation." Canadian Journal of Fisheries and Aquatic Sciences 76, no. 8 (2019): 1376–87. http://dx.doi.org/10.1139/cjfas-2017-0578.

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We analyzed changes in the condition, early growth, and resource use of lake trout (Salvelinus namaycush) from a Boreal Shield lake in response to an experimental aquaculture operation. Annual small-scale commercial production of rainbow trout (Oncorhynchus mykiss) resulted in increased lake trout body condition during aquaculture operations, which was positively related to minnow catch per unit effort (CPUE). Incremental increases in growth led to larger lake trout following aquaculture. While the littoral energy assimilated by lake trout did not change linearly from 2002 to 2009, we observed

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Hodgson, James R., Carol J. Hodgson, and Scott M. Brooks. "Trophic Interaction and Competition Between Largemouth Bass (Micropterus salmoides) and Rainbow Trout (Oncorhynchus mykiss) in a Manipulated Lake." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 9 (1991): 1704–12. http://dx.doi.org/10.1139/f91-202.

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We examined the impact of competition between largemouth bass (Micropterus salmoides) and rainbow trout (Oncorhynchus mykiss) on diet and condition factor of the two species. Data were collected from Paul Lake (a control lake containing only bass) and Peter Lake (an experimental lake to which trout were introduced) (Michigan, USA). We compared diets of 1988 bass and trout in Peter Lake, 1987 and 1988 bass in both Peter and Paul lakes, and 1988 trout and 1987 bass in Peter Lake. Patterns in diet overlap demonstrated with pooled sample methodology could not always be matched with a random indivi

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Searle, Peter C., Joshua A. Verde, and Mark C. Belk. "Food Web Structure Informs Potential Causes of Bimodal Size Structure in a Top Predator." Open Fish Science Journal 11, no. 1 (2018): 36–45. http://dx.doi.org/10.2174/1874401x01811010036.

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Background: Assemblages of fishes in lakes and reservoirs in the western USA are dominated by non-native, large-bodied, piscivorous fishes that lack a shared evolutionary history. Top predators in these crowded systems are often characterized by unstable population dynamics and poor somatic growth rates. One such assemblage is in Fish Lake, located in southern Utah, USA, in which introduced lake trout (Salvelinus namaycush, Walbaum) exhibit a bimodal growth pattern. A few lake trout in Fish Lake grow rapidly to large size typical of the species; whereas, most never grow beyond 600 mm total len

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Benoît, Pierre-Olivier, Beatrix E. Beisner, and Christopher T. Solomon. "Growth rate and abundance of common fishes is negatively related to dissolved organic carbon concentration in lakes." Canadian Journal of Fisheries and Aquatic Sciences 73, no. 8 (2016): 1230–36. http://dx.doi.org/10.1139/cjfas-2015-0340.

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Dissolved organic carbon (DOC) can limit food web productivity in lakes, potentially imposing resource limitation on fishes. We asked whether the abundance or early growth rate of three fish species was negatively related to DOC in 59 lakes in southern Quebec, Canada, where DOC concentrations ranged from 4 to 16 mg·L−1 for lakes containing walleye (Sander vitreum) and yellow perch (Perca flavescens) and from 2.6 to 9 mg·L−1 for lakes containing lake trout (Salvelinus namaycush). Estimates of abundance and growth rate were more precise for walleye and lake trout than for yellow perch because of

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Mills, K. H., S. M. Chalanchuk, L. C. Mohr, and I. J. Davies. "Responses of Fish Populations in Lake 223 to 8 Years of Experimental Acidification." Canadian Journal of Fisheries and Aquatic Sciences 44, S1 (1987): s114—s125. http://dx.doi.org/10.1139/f87-287.

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Lake 223 in the Experimental Lakes Area, northwestern Ontario, was experimentally acidified with sulfuric acid from 1976 (initial average pH 6.49) to 1981 (average pH 5.02), and then maintained at pH 5.02 to 5.13 from 1981 to 1983. Lake trout (Salvelinus namaycush), white sucker (Catostomus commersoni), fathead minnow (Pimephales promelas), and slimy sculpin (Cottus cognatus) were abundant at the onset of acidification. A decline in the abundance of fathead minnow began in 1979 (pH 5.64), and was followed first by a rapid increase in number of pearl dace (Semotilus margarita) in 1980 (pH 5.59)

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Madenjian, Charles P., Brian D. Chipman, and J. Ellen Marsden. "New estimates of lethality of sea lamprey (Petromyzon marinus) attacks on lake trout (Salvelinus namaycush): implications for fisheries management." Canadian Journal of Fisheries and Aquatic Sciences 65, no. 3 (2008): 535–42. http://dx.doi.org/10.1139/f07-187.

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Sea lamprey (Petromyzon marinus) control in North America costs millions of dollars each year, and control measures are guided by assessment of lamprey-induced damage to fisheries. The favored prey of sea lamprey in freshwater ecosystems has been lake trout (Salvelinus namaycush). A key parameter in assessing sea lamprey damage, as well as managing lake trout fisheries, is the probability of an adult lake trout surviving a lamprey attack. The conventional value for this parameter has been 0.55, based on laboratory experiments. In contrast, based on catch curve analysis, mark–recapture techniqu

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Ihssen, P. E., J. M. Casselman, G. W. Martin, and R. B. Phillips. "Biochemical Genetic Differentiation of Lake Trout (Salvelinus namaycush) Stocks of the Great Lakes Region." Canadian Journal of Fisheries and Aquatic Sciences 45, no. 6 (1988): 1018–29. http://dx.doi.org/10.1139/f88-125.

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Allelic frequencies for lake trout (Salvelinus namaycush) samples collected from 27 small lakes or spawning shoals on larger lakes did not show significant annual changes. Levels of genetic variability were in the high range for Salmonidae, with 57% of the loci examined polymorphic (1% criterion) and 4.7% average heterozygosity per locus. Twenty-one percent of the total genetic variability was due to differences between stocks. Highly significant allelic frequency differences were found among allopatric as well as sympatric stocks. Genetic differences among sympatric stocks of Lake Superior in

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Ryan, Phil A., and Terry R. Marshall. "A Niche Definition for Lake Trout (Salvelinus namaycush) and Its Use to Identify Populations at Risk." Canadian Journal of Fisheries and Aquatic Sciences 51, no. 11 (1994): 2513–19. http://dx.doi.org/10.1139/f94-250.

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Lake trout (Salvelinus namaycush) populations require cold water with high dissolved oxygen content for survival. We developed models that predict the availability of such habitat, using lake mean depth, which describes both the thermal regime and the initial oxygen reserves, and using a measure of primary productivity, which defines the subsequent oxygen demand of the sediments and water column. Measures of primary production include either phosphorus concentration, chlorophyll a concentration, or Secchi disk transparency. The models are presented as a series of seasonal oxygen depletion isop

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Koene, J. Peter, Kathryn R. Elmer, and Colin E. Adams. "Intraspecific variation and structuring of phenotype in a lake-dwelling species are driven by lake size and elevation." Biological Journal of the Linnean Society 131, no. 3 (2020): 585–99. http://dx.doi.org/10.1093/biolinnean/blaa137.

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Abstract The fragmented, heterogeneous and relatively depauperate ecosystems of recently glaciated lakes present contrasting ecological opportunities for resident fish. Across a species, local adaptation may induce diverse and distinct phenotypic responses to various selection pressures. We tested for intraspecific phenotypic structuring by population in a common native lake-dwelling fish species across a medium-scale geographic region with considerable variation in lake types. We investigated potential lake-characteristic drivers of trophic morphology. Using geometric morphometric techniques,

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Borwick, Jason, Jim Buttle, and Mark S. Ridgway. "A topographic index approach for identifying groundwater habitat of young-of-year brook trout (Salvelinus fontinalis) in the landlake ecotone." Canadian Journal of Fisheries and Aquatic Sciences 63, no. 2 (2006): 239–53. http://dx.doi.org/10.1139/f05-212.

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We used a topographic index (TI) approach to link the presence of young-of-year (YOY) brook trout (Salvelinus fontinalis) at groundwater seepage and stream sites in the landlake ecotone with subwatershed topography surrounding a set of 21 lakes in Algonquin Provincial Park, Ontario. A lakeshore site's TI value was positively related to the temperature difference between the substrate and lake surface, indicating higher TI values were associated with greater groundwater input. YOY brook trout tended to occupy lakeshore sites with relatively large TI values. Groundwater habitat available to YOY

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Madenjian, Charles P., Daniel V. O'Connor, and David A. Nortrup. "A new approach toward evaluation of fish bioenergetics models." Canadian Journal of Fisheries and Aquatic Sciences 57, no. 5 (2000): 1025–32. http://dx.doi.org/10.1139/f99-280.

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A new approach was used to evaluate the Wisconsin bioenergetics model for lake trout (Salvelinus namaycush). Lake trout in laboratory tanks were fed alewife (Alosa pseudoharengus) and rainbow smelt (Osmerus mordax), prey typical of lake trout in Lake Michigan. Food consumption and growth by lake trout during the experiment were measured. Polychlorinated biphenyl (PCB) concentrations of the alewife and rainbow smelt, as well as of the lake trout at the beginning and end of the experiment, were determined. From these data, we calculated that lake trout retained 81% of the PCBs contained within t

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Goddard, C. I., D. H. Loftus, J. A. MacLean, C. H. Olver, and B. J. Shuter. "Evaluation of the Effects of Fish Community Structure on Observed Yields of Lake Trout (Salvelinus namaycush)." Canadian Journal of Fisheries and Aquatic Sciences 44, S2 (1987): s239—s248. http://dx.doi.org/10.1139/f87-326.

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Creel and lake survey data from 87 Ontario lakes with self-sustaining lake trout (Salvelinus namaycush) populations were analysed to determine the effect of intrinsic factors, such as fish community structure, and extrinsic factors, such as angling-effort, on the observed yields of lake trout. Multiple regression analyses showed that angling-effort and lake area, in order of importance, explained almost 82% of the variation in annual catches. Analyses of covariance were used to test a variety of hypotheses about how community structure — the presence of forage, competitors, or alternate sports

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Reckhow, Kenneth H., Robert W. Black, Thomas B. Stockton Jr., J. David Vogt, and Judith G. Wood. "Empirical Models of Fish Response to Lake Acidification." Canadian Journal of Fisheries and Aquatic Sciences 44, no. 8 (1987): 1432–42. http://dx.doi.org/10.1139/f87-172.

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A large historical data set from the Adirondack region of New York was compiled to study the relationship between water chemistry variables associated with acid precipitation and the presence/absence of selected fish species. The data set was used to examine simple statistical models for fish presence/absence, as a function of the water chemistry variables, for brook trout (Salvelinus fontinalis), lake trout (Salvelinus namaycush), white sucker (Catostomus commersoni), and yellow perch (Perca flavescens). Of these models, only those for brook trout and lake trout were found to be acceptable ba

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Ryan, P. M., and J. J. Kerekes. "Correction of Relative Fish Abundance Estimates from Catch Data for Variable Fishing Intensity during Lake Surveys." Canadian Journal of Fisheries and Aquatic Sciences 46, no. 6 (1989): 1022–25. http://dx.doi.org/10.1139/f89-132.

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Six small Newfoundland lakes were fished with gillnets over a 3–6 yr period in a manner typical of standard lake surveys where surveyors have a fixed amount of gear available, but lake size varies. Catch and effort data for brook trout (Salvelinus fontinalis) were examined for the purpose of selecting an appropriate measure of the relative abundance of trout. Fishing effort was not a function of lake area but fishing intensity or fishing effort per unit area varied inversely with lake area. Brook trout yield (kilograms per hectare) was positively related to fishing intensity Catch per unit eff

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34

SADLER, S. E., G. W. FRIARS, and P. E. IHSSEN. "THE INFLUENCE OF TEMPERATURE AND GENOTYPE ON THE GROWTH RATE OF HATCHERY-REARED SALMONIDS." Canadian Journal of Animal Science 66, no. 3 (1986): 599–606. http://dx.doi.org/10.4141/cjas86-066.

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Growth rates of three salmonid species, brook trout (Salvelinus fontinalis), lake trout (S. namaycush), and rainbow trout (Salmo gairdneri) and one hybrid, splake (S. namaycush × S. fontinalis) were compared at 10 and 16 °C. Two strains of each species, and one of the splake hybrid were examined. At 10 °C the ranking of specific growth rate from highest to lowest for species was: rainbow trout, lake trout, splake, brook trout. At 16 °C the order was: brook trout, rainbow trout, splake, and lake trout. Brook trout, rainbow trout and splake had significantly higher specific growth rates at 16 °C

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35

Kidd, Karen A., David W. Schindler, Raymond H. Hesslein, and Derek CG Muir. "Effects of trophic position and lipid on organochlorine concentrations in fishes from subarctic lakes in Yukon Territory." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 4 (1998): 869–81. http://dx.doi.org/10.1139/f97-307.

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Concentrations of organochlorines in lake trout (Salvelinus namaycush), burbot (Lota lota), and northern pike (Esox lucius) from subarctic lakes in Yukon Territory varied significantly among populations, and these differences could not be ascribed to size or age of the fishes. For each species, lipid content and trophic positioning (measured by stable nitrogen isotope ratios; delta 15N) were significantly different across populations, and the latter differences could not be attributed to variable delta 15N at the base of the food webs. Across lakes, concentrations of up Sigma PCB, Sigma DDT, c

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Gunn, John M., and Rod Sein. "Effects of forestry roads on reproductive habitat and exploitation of lake trout (Salvelinus namaycush) in three experimental lakes." Canadian Journal of Fisheries and Aquatic Sciences 57, S2 (2000): 97–104. http://dx.doi.org/10.1139/f00-129.

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This study was designed to test the effects of two potential impacts of forest access roads on lake trout (Salvelinus namaycush) lakes in the Boreal Shield ecozone: (i) loss of reproductive habitat through siltation and (ii) increased access and exploitation. During an 9-year study (1991-1999) in Whitepine Lake, access to seven original spawning sites and over 250 alternate spawning sites was progressively removed by covering the substrate with opaque plastic sheeting to simulate siltation. No effects on recruitment of lake trout have yet been detected. Mark-recapture estimates of juvenile (&l

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37

Kaeding, Lynn R., Glenn D. Boltz, and Daniel G. Carty. "Lake Trout Discovered in Yellowstone Lake Threaten Native Cutthroat Trout." Fisheries 21, no. 3 (1996): 16–20. http://dx.doi.org/10.1577/1548-8446(1996)021<0016:ltdiyl>2.0.co;2.

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Parks, Timothy P., and Andrew L. Rypel. "Predator–prey dynamics mediate long-term production trends of cisco (Coregonus artedi) in a northern Wisconsin lake." Canadian Journal of Fisheries and Aquatic Sciences 75, no. 11 (2018): 1969–76. http://dx.doi.org/10.1139/cjfas-2017-0302.

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We quantified production, biomass, and production to biomass (P/B) ratios for cisco (Coregonus artedi) in Trout Lake, Wisconsin, USA (2001–2015). Across all years, annual production, biomass, and P/B were variable ranging 0.6–30.2 kg·ha−1·year−1, 1.2–39.7 kg·ha−1, and 0.4–0.9·year−1, respectively. Cisco production exhibited obvious decline. However, neither biomass nor P/B changed significantly over time. Long-term patterns of environmental conditions remained unchanged during the study and were unrelated to cisco production. However, lake trout (Salvelinus namaycush) relative abundance showed

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Eby, Lisa A., Lars G. Rudstam, and James F. Kitchell. "Predator responses to prey population dynamics: an empirical analysis based on lake trout growth rates." Canadian Journal of Fisheries and Aquatic Sciences 52, no. 7 (1995): 1564–71. http://dx.doi.org/10.1139/f95-149.

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Lake trout (Salvelinus namaycush) growth rates were lower in Lake Superior (with the lowest prey density) than in Lakes Michigan and Ontario. In contrast, consumption rates (estimated using bioenergetics models) of lake trout were similar in Lakes Superior, Michigan, and Ontario because the primary prey in Lake Superior, rainbow smelt (Osmerus mordax), have a lower energy content than the primary prey in Lakes Michigan and Ontario, alewife (Alosa pseudoharengus). Estimated consumption rates did not respond to three-to five-fold changes in prey density within lakes and were similar across a 100

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Wilson, Christopher C., and Paul DN Hebert. "Phylogeography and postglacial dispersal of lake trout (Salvelinus namaycush) in North America." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 4 (1998): 1010–24. http://dx.doi.org/10.1139/f97-286.

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We used restriction fragment length polymorphism (RFLP) analysis of mitochondrial DNA (mtDNA) diversity to assess the complex postglacial history of lake trout (Salvelinus namaycush) and test existing dispersal hypotheses. A pilot survey with 30 restriction enzymes was carried out on lake trout from 16 geographically representative populations to determine phylogenetically informative characters. Subsequent screening of 1416 lake trout from 93 populations across the species' range with nine variable restriction enzymes showed that lake trout from at least five glacial refugia contributed to ex

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Graynoth, E. "Determination of the age of brown and rainbow trout in a range of New Zealand lakes." Marine and Freshwater Research 47, no. 5 (1996): 749. http://dx.doi.org/10.1071/mf9960749.

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Brown trout (Salmo trutta) and rainbow trout (Oncorhynchus mykiss) from eight New Zealand lakes were aged by length-frequency analysis and by examining otoliths, pectoral fin rays and scales. Bimonthly changes in the length frequency of age classes were used to age fish for their first 2 or 3 years of life. Growth rates were highest in spring and summer, when a single wide opaque band was laid down on otoliths and fin rays, followed by a narrow transparent band in winter. Age estimates from otoliths agreed with 94-97% of those from length-frequency methods and with the ages of 21 tagged fish.

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Keeley, E. R., E. A. Parkinson, and E. B. Taylor. "Ecotypic differentiation of native rainbow trout (Oncorhynchus mykiss) populations from British Columbia." Canadian Journal of Fisheries and Aquatic Sciences 62, no. 7 (2005): 1523–39. http://dx.doi.org/10.1139/f05-062.

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We sampled 34 native rainbow trout (Oncorhynchus mykiss) populations over a wide geographic area of British Columbia to determine whether variation in morphology is related to differences in habitat or fish community characteristics experienced by a population. After correcting for differences in body size, the most dramatic differences occurred in external characteristics between stream- and lake-dwelling populations. Rainbow trout from streams had more robust bodies with larger caudal peduncles and heads and longer paired fins than rainbow trout from lakes. Unlike other lake populations, pis

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Mason, Doran M., Timothy B. Johnson, and James F. Kitchell. "Consequences of prey fish community dynamics on lake trout (Salvelinus namaycush) foraging efficiency in Lake Superior." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 5 (1998): 1273–84. http://dx.doi.org/10.1139/f98-007.

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We used a size-structured model, indexed by age, that combines bioenergetics and foraging theory to evaluate the effects of prey fish community structure (species dominance, size structure, and density) on the diet and net foraging efficiency of lake trout (Salvelinus namaycush) in Lake Superior. Prey size structure was important for young lake trout but decreased in importance for older lake trout, especially with increasing prey density. The model predicted that rainbow smelt (Osmerus mordax) should dominate the diet of young lake trout due to the size-dependent capture limitations of larger

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Crane, Penelope, Patrick Walsh, Cara Lewis, and John Wenburg. "Origin and Genetic Diversity of Lake Trout in the Togiak National Wildlife Refuge, Alaska." Journal of Fish and Wildlife Management 6, no. 1 (2015): 130–44. http://dx.doi.org/10.3996/032014-jfwm-022.

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Abstract Lake trout Salvelinus namaycush is a slow-growing, late-maturing, cold-water-adapted species whose native distribution is described by the glaciated regions of North America. Southwestern Alaska, the western limit of the species range, has undergone repeated episodes of glacial advance and retreat. In this study, lake trout were sampled from 15 lakes in six drainages on or near Togiak National Wildlife Refuge (TNWR) in southwestern Alaska. Data from 14 microsatellite loci were used to test for genetic evidence that lake trout survived the most recent glacial advance in a local refugiu

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45

Ellrott, Brian J., and J. Ellen Marsden. "Lake Trout Reproduction in Lake Champlain." Transactions of the American Fisheries Society 133, no. 2 (2004): 252–64. http://dx.doi.org/10.1577/02-165.

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46

Elrod, Joseph H., Robert O’Gorman, Clifford P. Schneider, et al. "Lake Trout Rehabilitation in Lake Ontario." Journal of Great Lakes Research 21 (1995): 83–107. http://dx.doi.org/10.1016/s0380-1330(95)71085-1.

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47

Eshenroder, Randy L., N. Robert Payne, James E. Johnson, Charles Bowen, and Mark P. Ebener. "Lake Trout Rehabilitation in Lake Huron." Journal of Great Lakes Research 21 (1995): 108–27. http://dx.doi.org/10.1016/s0380-1330(95)71086-3.

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48

Schram, Stephen T., and Mary C. Fabrizio. "Longevity of Lake Superior Lake Trout." North American Journal of Fisheries Management 18, no. 3 (1998): 700–703. http://dx.doi.org/10.1577/1548-8675(1998)018<0700:lolslt>2.0.co;2.

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49

Mason, Doran M., Andrew Goyke, and Stephen B. Brandt. "A spatially explicit bioenergetics measure of habitat quality for adult salmonines: Comparison between Lakes Michigan and Ontario." Canadian Journal of Fisheries and Aquatic Sciences 52, no. 7 (1995): 1572–83. http://dx.doi.org/10.1139/f95-750.

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We used spatially explicit modeling to compare habitat quality for chinook salmon, Oncorhynchus tshawytscha, and lake trout, Salvelinus namaycush, in Lakes Michigan and Ontario. This grid-based approach predicts a predator's physiological growth response, growth rate potential, from measured physical and biological environmental conditions and is a species-specific measure of habitat quality. Underwater acoustics was used to map prey spatial distributions, abundances, and sizes. A foraging model defined predator consumption rates from prey data. A bioenergetics model calculated growth rate pot

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50

Meeuwig, Michael H., and Mary M. Peacock. "Food Web Interactions Associated With a Lahontan Cutthroat Trout Reintroduction Effort in an Alpine Lake." Journal of Fish and Wildlife Management 8, no. 2 (2017): 449–64. http://dx.doi.org/10.3996/092016-jfwm-073.

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Abstract Fisheries managers have stocked Lahontan Cutthroat Trout Oncorhynchus clarkii henshawi into Fallen Leaf Lake, California, since 2002 in an attempt to reestablish a naturally reproducing lacustrine population. However, the food web in Fallen Leaf Lake has been altered by the past introduction of nonnative species that may prey on or compete with reintroduced Lahontan Cutthroat Trout. Therefore, we used a combination of stomach content and stable isotope analyses to evaluate trophic characteristics within the aquatic species assemblage in Fallen Leaf Lake. Lahontan Cutthroat Trout preye

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