Preferred Temperature of Yearling Lake Trout, Salvelinus namaycush

1970 ◽  
Vol 27 (10) ◽  
pp. 1729-1733 ◽  
Author(s):  
R. W. McCauley ◽  
J. S. Tait
Keyword(s):  
Lake Trout ◽  
Salvelinus Namaycush ◽  
Acclimation Temperature ◽  
Preferred Temperature ◽  
Stratified Lakes ◽  
Preferred Temperatures

Preferred temperatures were determined for yearling lake trout acclimated to 5, 10, 15, and 20 C. Acclimation temperature had virtually no effect on preferred temperature. The final preferendum was 11.7 C, which is about 2 degrees C warmer than the temperature at which lake trout are most commonly caught in thermally stratified lakes.

Thermal Niche of Larval Sea Lamprey, Petromyzon marinus

1994 ◽  
Vol 51 (2) ◽  
pp. 253-262 ◽  
Author(s):  
John A. Holmes ◽  
Ping Lin
Keyword(s):  
Metabolic Rate ◽  
Integrated Management ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Acclimation Temperature ◽  
Preferred Temperature ◽  
Thermal Habitat ◽  
Practical Applications ◽  
Thermal Niche ◽  
Preferred Temperatures

We used behavioral and physiological responses of larval sea lamprey, Petromyzon marinus, to temperature to describe the thermal niche and define optimal thermal habitat. Acclimation temperature had a weak direct positive effect on acute preferred temperatures in summer but no effect on acute preferred temperatures in winter tests. Swimming speed, mass, and acclimation temperature accounted for 66% of the variation in the active metabolic rate of larval sea lamprey. When larvae are swimming at their maximum prolonged rate, the relationship between temperature and metabolic rate is a unimodal curve, as has been found for more active fish species. The final preferred temperature in summer, 20.8 °C, is similar to the temperature at which maximum scope for activity occurs, approximately 19 °C. We propose the "fundamental thermal niche" of larval sea lamprey to be the range of temperatures between 17.8 and 21.8 °C. Some practical applications for the thermal niche are sketched with respect to the integrated management of sea lamprey in the Great Lakes.

Preferred Temperatures of F3 to F5 Hybrids of Salvelinus fontinalis × S. namaycush

1976 ◽  
Vol 33 (2) ◽  
pp. 197-202 ◽  
Author(s):  
C. I. Goddard ◽  
J. S. Tait
Keyword(s):  
Lake Trout ◽  
Salvelinus Fontinalis ◽  
Acclimation Temperature ◽  
Generation Number ◽  
Preferred Temperatures

Preferred temperatures were determined for samples of four generations, F3, F4, "F4.5" (F4 × F3), and F5 of yearling splake (Salvelinus fontinalis × S. namaycush), acclimated 4, 8, 12, 16, and 20 C. Final preferenda for the four generations were 16.3, 15.9, 15.7, and 14.8 C, respectively, decreasing as generation number increased. Although these values are close to the 16 C preferendum of S. fontinalis, they show a trend towards the lake trout preferendum of 11.7 C. The hybrids are like S. namaycush in having preferred temperatures that are virtually unaffected by changes in acclimation temperature or season.

The Preferred Temperature of Fish and their Midsummer Distribution in Temperate Lakes and Streams

1958 ◽  
Vol 15 (4) ◽  
pp. 607-624 ◽  
Author(s):  
R. G. Ferguson
Keyword(s):  
Yellow Perch ◽  
Lake Trout ◽  
Micropterus Salmoides ◽  
Perca Flavescens ◽  
Acclimation Temperature ◽  
Field Observations ◽  
Preferred Temperature ◽  
Thermal Distribution ◽  
Laboratory Results ◽  
Response To Temperature

Laboratory studies of preferred temperature with yellow perch (Perca flavescens) are compared with results from 21 other species. These show that temperature, if acting alone, can determine the distribution of fish in laboratory apparatus. Factors such as light, conditioned responses related to feeding routines, and social behaviour can interfere with the expression of the response to temperature. Subdued lighting conditions were necessary in the experiments with Oncorhynchus, Salvelinus and Coregonus, whereas full daylight was required in experiments with Perca flavescens.The level of thermal acclimation influences the range of temperature preferred. In general the preferred temperature is considerably higher than the acclimation temperature at low thermal acclimations, but this difference decreases up to the final preferendum, where both coincide. The final preferendum and the relation between acclimation and preferred temperature is characteristic for the species. The shape of the resulting curve may have some value in interpreting observations of fish mortalities and distribution in nature. The final preferendum of the yellow perch from the present work was 24.2 °C., from other work using older fish it was 21.0 °C.Summer field observations of yellow perch in Lake Nipissing, Costello Lake and Opeongo Lake in Ontario, showed average thermal distribution of 19.7 °C., 21.0 °C. and 21.2 °C. respectively. This agrees well with 20.8 °C. observed for four Wisconsin lakes. Oxygen depletion reported for Tennessee Valley reservoirs, distribution of primary prey species of lake trout in New York waters, and other factors, have been shown to modify the thermal distribution in nature. Differential sex response to temperature may be important in the perch. Field observations of thermal distributions for other species are also presented.A comparison of the laboratory and field data shows good agreement with fish having colder final preferenda: Salvelinus fontinalis, Salvelinus namaycush, Salvelinus hybrid and Coregonus clupeaformis. Fish with warmer final preferenda, such as Micropterus salmoides, Micropterus dolomieu and Lota lota lacustris, showed higher temperatures in the laboratory than was shown by field observations. Young Perca flavescens showed similar results, but experiments with older perch showed excellent agreement between laboratory results and held observations. The lack of agreement between laboratory results and field observations is attributed to age differences; laboratory experiments being performed with young fish and held observations being made on older fish.

PREFERRED TEMPERATURE OF RAINBOW TROUT (SALMO GAIRDNERI RICHARDSON) AND ITS UNUSUAL RELATIONSHIP TO ACCLIMATION TEMPERATURE

1958 ◽  
Vol 36 (4) ◽  
pp. 563-567 ◽  
Author(s):  
E. T. Garside ◽  
J. S. Tait
Keyword(s):  
Rainbow Trout ◽  
Salmo Gairdneri ◽  
Acclimation Temperature ◽  
Preferred Temperature ◽  
Preferred Temperatures

The modal preferred temperatures of rainbow trout acclimated to 5 °C, 10 °C, 15 °C., and 20 °C. were determined photographically to be 16 °C, 15 °C., 13 °C, and 11 °C., respectively. The final preferendum was 13 °C. The phenomenon of decreasing preferred temperature with increasing acclimation temperature has not been reported for any other species of fish.

Evidence of successful river spawning by lake trout (Salvelinus namaycush) in the Lower Niagara River, Lake Ontario

2021 ◽  
Author(s):  
Alexander Gatch ◽  
Dimitry Gorsky ◽  
Zy Biesinger ◽  
Eric Bruestle ◽  
Kelley Lee ◽  
...  
Keyword(s):  
Lake Trout ◽  
Lake Ontario ◽  
Salvelinus Namaycush ◽  
Niagara River

An examination of the PCB: lipid relationship among individual fish

1997 ◽  
Vol 54 (5) ◽  
pp. 1031-1038
Author(s):  
C A Stow ◽  
L J Jackson ◽  
J F Amrhein
Keyword(s):  
Salmo Trutta ◽  
Lake Michigan ◽  
Oncorhynchus Tshawytscha ◽  
Lake Trout ◽  
Coho Salmon ◽  
Salvelinus Namaycush ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Strong Linear Correlation ◽  
Brown Trout Salmo Trutta ◽  
The Relationship

We examined data from 1984 to 1994 for five species of Lake Michigan salmonids to explore the relationship between total PCB concentration and percent lipid. When we compared mean species lipid and PCB values, we found a strong linear correlation. When we compared values among individuals, we found modest positive PCB:lipid associations in brown trout (Salmo trutta), chinook salmon (Oncorhynchus tshawytscha), coho salmon (Oncorhynchus kisutch), and rainbow trout (Oncorhynchus mykiss) collected during spawning, but positive associations were not apparent among nonspawning individuals. Lake trout (Salvelinus namaycush) exhibited no discernible PCB:lipid relationship. Our results are not incompatible with previous observations that contaminants are differentially partitioned into lipids within a fish, but these results do suggest that lipids are not a major factor influencing contaminant uptake.

Classification of Sea Lamprey (Petromyzon marinus) Attack Marks on Great Lakes Lake Trout (Salvelinus namaycush)

1980 ◽  
Vol 37 (11) ◽  
pp. 1989-2006 ◽  
Author(s):  
Everett Louis King Jr.
Keyword(s):  
Great Lakes ◽  
Lake Trout ◽  
Petromyzon Marinus ◽  
Attachment Site ◽  
Sea Lamprey ◽  
Salvelinus Namaycush ◽  
Oral Disc ◽  
Field Assessment ◽  
Sea Lampreys

Criteria for the classification of marks inflicted by sea lamprey (Petromyzon marinus) into nine categories were developed from laboratory studies in an attempt to refine the classification system used in field assessment work. These criteria were based on characteristics of the attachment site that could be identified under field conditions by unaided visual means and by touching the attachment site. Healing of these marks was somewhat variable and was influenced by the size of lamprey, duration of attachment, severity of the wound at lamprey detachment, season and water temperature, and by other less obvious factors. Even under laboratory conditions staging of some wounds was difficult, especially at low water temperatures. If these criteria are to be used effectively and with precision in the field, close examination of individual fish may be required. If the feeding and density of specific year-classes of sea lampreys are to be accurately assessed on an annual basis, close attention to the wound size (as it reflects the size of the lamprey's oral disc) and character of wounds on fish will be required as well as consideration of the season of the year in which they are observed.Key words: sea lamprey, attack marks, lake trout, Great Lakes

Impact of Diet on Metabolism and Swimming Performance in Juvenile Lake Trout, Salvelinus namaycush

1989 ◽  
Vol 46 (3) ◽  
pp. 384-388 ◽  
Author(s):  
F. W. H. Beamish ◽  
J. C. Howlett ◽  
T. E. Medland
Keyword(s):  
Oxygen Consumption ◽  
Swimming Speed ◽  
Lake Trout ◽  
Swimming Performance ◽  
Salvelinus Namaycush ◽  
Feeding Trial ◽  
Direct Association ◽  
Feeding Trials ◽  
Velocity Increments ◽  
Isocaloric Diets

Juvenile lake trout, Salvelinus namaycush, of similar size were fed one of three isocaloric diets, each differing in protein and lipid content. Oxygen consumption and swimming performance were measured in a recirculating water flume at intervals throughout the 70-d feeding trials (10 °C). Swimming speed was increased by stepwise velocity increments (5 cm∙s−1) and oxygen consumption was measured at each velocity between 20 and 45 cm∙s−1. Oxygen consumption for a given speed did not differ significantly throughout the feeding trial nor among the diets implying a similarity in the quality and quantity of substrate catabolized for energy. Basal metabolism (0 cm∙s−1) was also independent of diet and feeding interval. Critical swimming speed increased with dietary and carcass protein content to suggest a direct association with muscle mass and number of myofilaments.

Land water linkages: influences of riparian deforestation on lake thermocline depth and possible consequences for cold stenotherms

1997 ◽  
Vol 54 (6) ◽  
pp. 1299-1305 ◽  
Author(s):  
Robert France
Keyword(s):  
Thermal Stratification ◽  
Lake Trout ◽  
Salvelinus Namaycush ◽  
Thermocline Depth ◽  
Experimental Lakes Area ◽  
Northwestern Ontario ◽  
Riparian Trees ◽  
Tree Removal ◽  
Riparian Tree ◽  
Land Water

The purpose of the present study was to determine if riparian deforestation would expose lake surfaces to stronger winds and therefore bring about deepening of thermoclines and resulting habitat losses for cold stenotherms such as lake trout (Salvelinus namaycush). Removal of protective riparian trees through wind blowdown and two wildfires was found to triple the overwater windspeeds and produce thermocline deepening in two lakes at the Experimental Lakes Area. A survey of thermal stratification patterns in 63 northwestern Ontario lakes showed that lakes around which riparian trees had been removed a decade before through either clearcutting or by a wildfire were found to have thermocline depths over 2 m deeper per unit fetch length compared with lakes surrounded by mature forests. Riparian tree removal will therefore exacerbate hypolimnion habitat losses for cold stenotherms that have already been documented to be occurring as a result of lake acidification, eutrophication, and climate warming.

scholarly journals Genetic and phenotypic variation along an ecological gradient in lake trout Salvelinus namaycush

2016 ◽  
Vol 16 (1) ◽  
Author(s):  
Shauna M. Baillie ◽  
Andrew M. Muir ◽  
Michael J. Hansen ◽  
Charles C. Krueger ◽  
Paul Bentzen
Keyword(s):  
Phenotypic Variation ◽  
Lake Trout ◽  
Salvelinus Namaycush ◽  
Ecological Gradient
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