A topographic index approach for identifying groundwater habitat of young-of-year brook trout (Salvelinus fontinalis) in the land–lake ecotone

2006 ◽  
Vol 63 (2) ◽  
pp. 239-253 ◽  
Author(s):  
Jason Borwick ◽  
Jim Buttle ◽  
Mark S Ridgway
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Unit Length ◽  
Information Criterion ◽  
Lake Surface ◽  
Topographic Index ◽  
Groundwater Seepage ◽  
Index Approach ◽  
A Site ◽  
Provincial Park

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 land–lake 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 brook trout was relatively rare, with only a few sites used consistently on an annual basis. Larger lakes had fewer groundwater habitat sites per unit length of shoreline than smaller lakes. Logistic regression analysis and model selection (via Akaike's Information Criterion) indicated the odds of finding YOY brook trout increased significantly when a site was a stream and, in the summer, when there was a large difference in temperature between lake substrate and lake surface. Most of the stream sites used by brook trout were not on the Ontario base map system but were revealed by the TI approach.

Genetic and environmental correlates of variation in body weight of brook trout (Salvelinus fontinalis)

1995 ◽  
Vol 52 (2) ◽  
pp. 307-314 ◽  
Author(s):  
Moira M. Ferguson ◽  
Arunas P. Liskauskas ◽  
Roy G. Danzmann
Keyword(s):  
Body Weight ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Environmental Correlates ◽  
Hatching Time ◽  
First Feeding ◽  
Lake Algonquin ◽  
Nested Designs ◽  
Males And Females ◽  
Provincial Park

Families of brook trout (Salvelinus fontinalis) were produced from adults collected from Mykiss Lake, Algonquin Provincial Park, Ontario, and reared in the laboratory for 1 year. Egg size and hatching time explained a significant amount of variation among families in mean weight of hatched embryos. Heavier embryos were produced from larger eggs, and embryos with earlier hatching times were also larger. First-feeding alevins reared at higher densities were smaller than those at lower densities. Multilocus enzyme heterozygosity was neither a significant predictor of mean family body weight at any age nor significantly associated with body weight of juveniles within families. Analyzing each enzyme locus separately revealed significant effects for G3PDH-1 in two families but in different directions. Fish from two mitochondrial DNA phylogenetic assemblages, A and B, differed significantly in weight as hatched embryos and first-feeding alevins. Similarly, the progeny of different males and females differed significantly in body weight at all ages sampled. Thus, parental effects were the most persistent correlates of body size of all those examined. The statistical analyses and the nested designs suggest that variation in body weight among the progeny of specific parents can partially be attributed to genetic effects.

Genetic Variation and Fitness: A Test in a Naturalized Population of Brook Trout (Salvelinus fontinalis)

1991 ◽  
Vol 48 (11) ◽  
pp. 2152-2162 ◽  
Author(s):  
Arunas P. Liskauskas ◽  
Moira M. Ferguson
Keyword(s):  
Brook Trout ◽  
Sexual Maturity ◽  
Salvelinus Fontinalis ◽  
Positive Association ◽  
Somatic Tissue ◽  
Age Classes ◽  
Life History Stages ◽  
Young Of The Year ◽  
The Relationship ◽  
Provincial Park

The relationship between enzyme heterozygosity and several components of fitness (size and survival) was examined in a naturalized population of brook trout (Salvelinus fontinalis) from Algonquin Provincial Park, Ontario. Significant differences in allele frequency and the number of heterozygous loci per individual were found among five age classes spanning most of the life history stages of brook trout in this population. A young of the year (YOY) cohort sampled after a period of high natural mortality had significantly greater numbers of heterozygous loci per individual than YOY sampled shortly after emergence from redd sites. A positive association between heterozygosity and size was only found in YOY sampled in June and not in the other age classes in which sexual maturity was not a complicating factor. The association between heterozygosity and size was affected by the onset of sexual maturity. Significant negative regressions between multilocus or single locus heterozygosity and size were found in mature males whereas heterozygosity was positively associated with size in females. These dissimilarities may be the result of differences in growth rates prior to sexual maturation and differential allocation of energy towards gametic and somatic tissue.

Stream acidification and mortality of brook trout (Salvelinus fontinalis) in response to timber harvest in Catskill Mountain watersheds, New York, USA

2005 ◽  
Vol 62 (5) ◽  
pp. 1168-1183 ◽  
Author(s):  
Barry P Baldigo ◽  
Peter S Murdoch ◽  
Douglas A Burns
Keyword(s):  
New York ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Basal Area ◽  
Timber Harvest ◽  
Stream Acidification ◽  
Clear Cut ◽  
Mountain Watersheds ◽  
Background Mortality ◽  
A Site

Effects of clear-cut and timber-stand improvement (TSI) harvests on water chemistry and mortality of caged brook trout (Salvelinus fontinalis) were evaluated in a study of three Catskill Mountain streams, 1994–2000. Harvests removed 73% of tree basal area (BA) from a clearcut subbasin, 5% BA from a TSI subbasin, and 14% BA at a site below the confluence of both streams. A fourth nonharvested site served as a control. Water quality and trout mortality were affected only in the clearcut stream. Acidity and concentrations of nitrate and inorganic monomeric aluminum (Alim) increased sharply during high flows after the first growing season (fall 1997). Acid–Alim episodes were severe during this period and decreased steadily in magnitude and duration thereafter. All trout at this site died within 7 days during spring 1998 and 85% died during spring 1999. Only background mortality was observed in other years at this site and at the other three sites during all tests. The absence of mortality in TSI watersheds indicates that limited harvests should not harm brook trout populations in acid-sensitive streams. Effects of tree harvests on fish communities are of concern, however, because many stream-dwelling species are more sensitive to acidified waters than brook trout.

Exotic “Gill Lice” Species (Copepoda: Lernaeopodidae:SalmincolaSPP.) Infect Rainbow Trout (Oncorhynchus mykiss) and Brook Trout (Salvelinus fontinalis) in the Southeastern United States

2017 ◽  
Vol 103 (4) ◽  
pp. 377-389 ◽  
Author(s):  
Carlos F. Ruiz ◽  
Jacob M. Rash ◽  
Doug A. Besler ◽  
Jackson R. Roberts ◽  
Micah B. Warren ◽  
...  
Keyword(s):  
United States ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Southeastern United States ◽  
Rainbow Trout Oncorhynchus Mykiss

Parasite-induced susceptibility to predation in diplostomiasis

Parasitology ◽  
1982 ◽  
Vol 85 (3) ◽  
pp. 495-501 ◽  
Author(s):  
P. Brassard ◽  
M. E. Rau ◽  
M. A. Curtis
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Marked Decrease ◽  
Infected Fish ◽  
Induced Susceptibility ◽  
Diplostomum Spathaceum

Guppies (Lebistes reticulatis) exposed to doses as low as 25 cercariae of Diplostomum spathaceum for 30 min were consistently and significantly more susceptible to predation by brook trout (Salvelinus fontinalis) than uninfected controls. The increase in susceptibility to predation was correlated with a marked decrease in the activity of infected fish.

scholarly journals Brook trout passage performance through culverts

2016 ◽  
Vol 73 (1) ◽  
pp. 94-104 ◽  
Author(s):  
Elsa Goerig ◽  
Theodore Castro-Santos ◽  
Normand Émile Bergeron
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Structural Characteristics ◽  
Passive Integrated Transponder ◽  
Complex Interactions ◽  
Factors Influencing ◽  
Several Variables ◽  
And Behavior ◽  
Steep Slopes ◽  
Corrugated Metal

Culverts can restrict access to habitat for stream-dwelling fishes. We used passive integrated transponder telemetry to quantify passage performance of >1000 wild brook trout (Salvelinus fontinalis) attempting to pass 13 culverts in Quebec under a range of hydraulic and environmental conditions. Several variables influenced passage success, including complex interactions between physiology and behavior, hydraulics, and structural characteristics. The probability of successful passage was greater through corrugated metal culverts than through smooth ones, particularly among smaller fish. Trout were also more likely to pass at warmer temperatures, but this effect diminished above 15 °C. Passage was impeded at higher flows, through culverts with steep slopes, and those with deep downstream pools. This study provides insight on factors influencing brook trout capacity to pass culverts as well as a model to estimate passage success under various conditions, with an improved resolution and accuracy over existing approaches. It also presents methods that could be used to investigate passage success of other species, with implications for connectivity of the riverscape.

Food Specialization By Individual Trout

1972 ◽  
Vol 29 (11) ◽  
pp. 1615-1624 ◽  
Author(s):  
James E. Bryan ◽  
P. A. Larkin
Keyword(s):  
Rainbow Trout ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Stomach Contents ◽  
Cutthroat Trout ◽  
Salmo Gairdneri ◽  
Potential Prey ◽  
Repeated Observation ◽  
Size Growth ◽  
Salmo Clarki

Analyses of stomach contents showed that the kinds of prey eaten by brook trout (Salvelinus fontinalis), cutthroat trout (Salmo clarki), and rainbow trout (Salmo gairdneri) were seldom distributed at random among the individuals. Repeated observation of food eaten by individuals in a stream and ponds showed that prey types were eaten in proportions which were characteristic for an individual.Specialization occurred on several different kinds of prey. Although the degree of specialization was higher during shorter intervals, the data suggested that some specialization persisted for half a year. There were no striking correlations between degree of specialization and other individual properties such as size, growth rate, weight of food, number of food items, previous specialization, or area of recapture.In addition to the observations on trout in relatively undisturbed habitats, a field experiment was conducted using laboratory-reared rainbow trout held in small ponds. The food of each trout in the experiment was sampled repeatedly. In analysis of variance, interaction among the individuals and kinds of prey eaten showed that food specialization occurred. Both the absolute and relative abundance of potential prey were constant during the experiment.

Electrophysiological abnormalities produced by ammonium in isolated perfused brook trout, Salvelinus fontinalis, hearts

1986 ◽  
Vol 28 (1) ◽  
pp. 47-53 ◽  
Author(s):  
J. K. Bubien ◽  
T. L. Meade
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis

scholarly journals Concomitant Antibiotic and Mercury Resistance Among Gastrointestinal Microflora of Feral Brook Trout, Salvelinus fontinalis

2012 ◽  
Vol 65 (5) ◽  
pp. 575-582 ◽  
Author(s):  
Matthew M. Meredith ◽  
Erin M. Parry ◽  
Justin A. Guay ◽  
Nicholas O. Markham ◽  
G. Russell Danner ◽  
...  
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Mercury Resistance ◽  
Gastrointestinal Microflora
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