Some Physiological Effects of Handling and Tricaine Methane-sulphonate Anesthetization upon the Brook Trout, Salvelinus fontinalis

1971 ◽  
Vol 28 (5) ◽  
pp. 625-633 ◽  
Author(s):  
Arthur H. Houston ◽  
Jane A. Madden ◽  
R. John Woods ◽  
Harry M. Miles
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Cardiac Activity ◽  
Aortic Pressure ◽  
Total Dissolved Solids ◽  
Physiological Effects ◽  
Autonomic Functions ◽  
Sodium Potassium ◽  
Methane Sulphonate ◽  
Lactate Levels

The effects of handling and anesthetization with tricaine methanesulphonate (Ayerst "Finquel") upon brook trout (Salvelinus fontinalis) have been investigated with reference to selected hematological and cardioventilatory parameters, and several aspects of body fluid chemistry. Alterations in hemoglobin, hematocrit, and total dissolved solids suggest that exposure to the anesthetic prompts a rapid hemoconcentration. Water content increases, and the plasma, tissue, and estimated cellular levels of several of the major electrolytes (sodium, potassium, calcium, and magnesium) are altered. Observations upon cardiac activity, dorsal aortic pressure, and ventilatory rate and amplitude support the hypothesis that Finquel exerts a depressive influence upon central autonomic functions. Handling alone leads to significant changes in plasma glucose and lactate levels, and in the concentrations and distributions of a number of the electrolytes investigated.

Nature and Time Course of Acclimation to Aluminum in Juvenile Brook Trout (Salvelinus fontinalis). I. Physiology

1991 ◽  
Vol 48 (10) ◽  
pp. 2006-2015 ◽  
Author(s):  
D. G. McDonald ◽  
C. M. Wood ◽  
R. G. Rhem ◽  
M. E. Mueller ◽  
D. R. Mount ◽  
...  
Keyword(s):  
Sialic Acid ◽  
Acid Content ◽  
Brook Trout ◽  
Time Course ◽  
Salvelinus Fontinalis ◽  
Sialic Acid Content ◽  
Progressive Development ◽  
The Face ◽  
Physiological Impact ◽  
Lactate Levels

Chronic exposure (up to 42 d) of juvenile brook trout (Salvelinus fontinalis) to sublethal aluminum at pH 5.2 resulted in a damage/repair acclimation phenomenon. The damage developed rapidly (within 24 h), was centered at the gills, and was characterized by substantial accumulation of Al, a corresponding reduction of gill sialic acid content (a measure of gill mucus), and inhibition of branchial Na+ transport. The corresponding internal effects of this initial damage were losses of electrolytes, hemoconcentration, and impaired tissue O2 delivery (as indicated by elevated lactate). Repair was characterized by progressive reduction of gill Al, restoration of sialic acid content, recovery of Na+ transport, and reduction in hemoconcentration and lactate levels. Accompanying the recovery was progressive development (by day 10 onwards) of increased resistance (i.e. acclimation) to acutely lethal Al. This acclimation was characterized by a reduction in both the rate of mortality and in the magnitude of physiological disturbances relative to control (i.e. Al naive) fish. The increased short-term resistance translated to greatly improved survivorship and correspondingly diminished physiological impact in the face of chronically elevated Al levels (2 wk at < 300 μg Al/L). The acclimation process clearly resulted from specific changes at the gills.

Blood Concentrations of Tricaine Methane Sulphonate in Brook Trout, Salvelinus fontinalis, During Anesthetization, Branchial Irrigation, and Recovery

1972 ◽  
Vol 29 (9) ◽  
pp. 1344-1346 ◽  
Author(s):  
A. H. Houston ◽  
R. J. Woods
Keyword(s):  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
Blood Clearance ◽  
Blood Concentrations ◽  
Methane Sulphonate

Blood concentrations of tricaine methane sulphonate increased rapidly upon immersion of trout in 100 mg/liter solutions of the anesthetic at 3.5–5 C, and also rose significantly during irrigation for 15 min with either 50 or 100 mg/liter solutions. Clearance was rapid following transfer to running freshwater recovery tanks. Graphical estimates of 50 and 90% blood clearance times were 20 and 55 min, respectively.

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.

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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