Subpopulation Status of Lake Whitefish (Coregonus clupeaformis) in Lake Winnipeg

1990 ◽  
Vol 47 (8) ◽  
pp. 1484-1494 ◽  
Author(s):  
A. H. Kristofferson ◽  
J. W. Clayton
Keyword(s):  
Lactate Dehydrogenase ◽  
Coregonus Clupeaformis ◽  
Genetic Contribution ◽  
Lake Whitefish ◽  
Morphometric Measurements ◽  
Lake Winnipeg ◽  
Meristic Counts ◽  
Grand Rapids ◽  
Parent Stock ◽  
Glycerol 3 Phosphate Dehydrogenase

Spawning lake whitefish in Lake Winnipeg from Dauphin River–Lake St. Martin, Traverse Bay, Berens River–Poplar River–Big Black River and Grand Rapids and in Little Playgreen Lake are accorded subpopulation status based on morphometric measurements, meristic counts, and differences in frequencies of alleles at the muscle glycerol-3-phosphate dehydrogenase (g-3-pdh-b) locus. The frequency of the g-3-pdh-b-3 allele in samples from Dauphin River–Lake St. Martin was 0.77 compared with 0.46 for whitefish from the remainder of Lake Winnipeg and Little Playgreen Lake. Two loci for isocitrate dehydrogenase and one lactate dehydrogenase locus are also polymorphic in these fish but no significant allele frequency differences were found at these loci among the samples of spawners compared above. Hatchery-reared lake whitefish, obtained from stock in Clearwater Lake and William Lake and planted as fry or eyed eggs in Lake Winnipeg at Dauphin River and Grand Rapids, do not appear to have made a detectable genetic contribution to the local whitefish stocks, based on differences in g-3-pdh-b and idh Bβ allele frequencies among parent stock and spawners captured near the release sites.

Phenotypic Variation in the Lake Whitefish, Coregonus clupeaformis, Induced by Introduction into a New Environment

1974 ◽  
Vol 31 (1) ◽  
pp. 55-62 ◽  
Author(s):  
J. S. Loch
Keyword(s):  
Feeding Habits ◽  
Morphological Characters ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Meristic Characters ◽  
Line Scale ◽  
Benthic Food ◽  
Glycerol 3 Phosphate Dehydrogenase ◽  
Gill Raker ◽  
Electrophoretic Phenotype

Adult lake whitefish (Coregonus clupeaformis) from Clearwater Lake and second generation adults of offspring from Clearwater whitefish transplanted to Lyons Lake were compared with respect to morphometric and meristic characters and isozymes of L-glycerol-3-phosphate dehydrogenase (GPDH). Feeding habits and abundance of pelagic and benthic foods were compared in the two lakes.Gill raker number, lateral line scale count, and interorbital width remained constant between parental and offspring populations. Gill raker length was the main character found to differ between the populations. This was found to be related to the percentage and type of benthic food eaten. Abrasion of the gill rakers is offered as an explanation for the differences in gill raker length. Differences were found in various other meristic and morphological characters, as well as in electrophoretic phenotype frequencies of isozymes of GPDH.

A Biochemical Genetic Study of Zoogeography of Lake Whitefish (Coregonus clupeaformis) in Western Canada

1977 ◽  
Vol 34 (5) ◽  
pp. 617-625 ◽  
Author(s):  
W. G. Franzin ◽  
J. W. Clayton
Keyword(s):  
Early Stage ◽  
River System ◽  
Glacial Refugia ◽  
Biochemical Data ◽  
Western Canada ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Yukon River ◽  
Central Canada ◽  
Glycerol 3 Phosphate Dehydrogenase

Frequencies of alleles of the genes governing electrophoretic phenotypes of lake whitefish (Coregonus clupeaformis) muscle glycerol-3-phosphate dehydrogenase (G-3-PDH) and lactate dehydrogenase (LDH) enzymes, the genetics of which were determined previously, proved useful tools for characterizing populations. Malate dehydrogenase (MDH) and hemoglobin electrophoretic phenotypes, the genetics of which have not been determined, proved useful only for discerning differences among large groups of populations. Using all these characters we determined postglacial routes of gene flow among western Canadian lake whitefish populations and related the biochemical data to the glacial refugia in which lake whitefish are believed to have survived the Wisconsin glaciation. Apparently most lake whitefish populations west of the Ontario–Manitoba boundary and east of the Rocky Mountains were derived from a Mississippi refugium stock with some input from the Bering refugium. At an early stage in the mixing of the two stocks, headwaters of the Peace, Athabasca, and Mackenzie rivers and the Fraser River system were invaded. Subsequently, these areas were cut off from mainstem rivers of the plains, and a G-3-PDH allele not found in early emigrants from the Mississippi refugium appeared and spread throughout the major river systems of central Canada. No evidence was found that any Mississippi stock lake whitefish were able to invade the upper Liard River and Yukon River system including the area of the Bering refugium. Bering stock lake whitefish probably emigrated from that refugium by way of headwater transfer from the Yukon River to the Liard River and possibly, by way of the Porcupine and Peel rivers, from the Yukon River to the lower Mackenzie River. Routes of postglacial dispersal suggested by geological information, rather than selection, appear to provide adequate explanations for the distributions of the biochemical characters in present day lake whitefish populations. This explanation of the biochemical data is also in accord with the distribution of modal gillraker counts in lake whitefish populations and also with the distribution of other freshwater fishes in western Canada. Key words: fish, lake whitefish, Coregonus clupeaformis, salmonidae, zoogeography, dehydrogenase, postglacial, biochemical genetics

Genetics of Multiple Lactate Dehydrogenase Isozymes in Muscle Tissue of Lake Whitefish (Coregonus clupeaformis)

1970 ◽  
Vol 27 (6) ◽  
pp. 1115-1121 ◽  
Author(s):  
J. W. Clayton ◽  
W. G. Franzin
Keyword(s):  
Lactate Dehydrogenase ◽  
Lateral Line ◽  
White Muscle ◽  
Heart Tissue ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Lactate Dehydrogenase Isozymes ◽  
Tissue Extracts ◽  
Fish Breeding ◽  
Ldh Isozymes

Electrophoresis of extracts of red lateral line muscle from lake whitefish (Coregonus clupeaformis) revealed two groups of lactate dehydrogenase (LDH) isozymes. In heart tissue extracts the faster moving set of isozymes predominated whereas most of the LDH in white muscle consisted of the slower set of electrophoretic isozymes.Three phenotypes of heart-type LDH isozymes were found in wild fish. Breeding experiments showed that there were two nondominant alleles at the locus coding the most anodal of the heart-type LDH subunits. The frequencies of these alleles were different in fish from two lakes.Our observations regarding the presence of discrete sets of multiple LDH isozymes in lake whitefish and the independent genetic control of isozymes within each set provide additional evidence for the probable tetraploid nature of salmonids.

Collapse of the Lake Whitefish (Coregonus clupeaformis) Fishery in Southern Indian Lake, Manitoba, following Lake Impoundment and River Diversion

1984 ◽  
Vol 41 (4) ◽  
pp. 692-700 ◽  
Author(s):  
R. A. Bodaly ◽  
T. W. D. Johnson ◽  
R. J. P. Fudge ◽  
J. W. Clayton
Keyword(s):  
Market Quality ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
River Diversion ◽  
Fish Catch ◽  
The Mean ◽  
Glycerol 3 Phosphate Dehydrogenase ◽  
Physical Changes ◽  
Traditional Fishing

The lake whitefish (Coregonus clupeaformis) fishery of Southern Indian Lake (SIL) has undergone a general collapse since lake impoundment and Churchill River diversion in 1976. The fishery was substantial from its inception in 1941, with a mean annual whitefish catch of 333 500 kg over the 3 decades prior to lake impoundment. The whitefish catch prior to impoundment was composed almost exclusively (> 99%) of light colored, export (A) quality fish that were only lightly parasitized with the muscle cysts of Triaenophorus crassus. The market quality of the catch was maintained by selective fishing of certain lake basins and avoiding areas of the lake that were known to produce lower quality fish. Catch per unit of effort on traditional fishing grounds declined soon after impoundment to about one-half preflooding levels. Total catches were maintained at or near preimpoundment levels by major increases in total effort until 1982, when the whitefish catch fell to about one third of its preimpoundment mean. Fishermen also responded to declines in catch per unit of effort on traditional fishing grounds with a major geographic shift of effort into areas formerly avoided. As a result, darker colored, continental (B) quality whitefish comprised from 12 to 72% of the summer catch in the 4 yr following impoundment. Dark whitefish are less marketable because of color and because of higher rates of Triaenophorus infestation. The mean Triaenophorus cyst count in shipments has increased markedly since impoundment and the lake was reclassified from export (A) to continental (B) classification in 1982. Catch declines on traditional fishing grounds apparently reflect the emigration of fish to other SIL basins and/or to adjoining water bodies. Prior to lake impoundment, there were significant differences in glycerol-3-phosphate dehydrogenase allele frequencies from whitefish samples taken from four basins of SIL and an adjacent unconnected lake, but these differences were absent after impoundment. It is hypothesized that these stock redistributions were triggered by physical changes in SIL after lake impoundment.

Genetics of Glycerol-3-phosphate Dehydrogenase Isozymes in White Muscle of Lake Whitefish (Coregonus clupeaformis)

1973 ◽  
Vol 30 (2) ◽  
pp. 187-193 ◽  
Author(s):  
J. W. Clayton ◽  
W. G. Franzin ◽  
D. N. Tretiak
Keyword(s):  
White Muscle ◽  
Natural Populations ◽  
Heat Inactivation ◽  
Starch Gel Electrophoresis ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Red Muscle ◽  
Catalytically Active ◽  
Coregonus Artedii ◽  
Glycerol 3 Phosphate Dehydrogenase

Multiple isozymes of glycerol-3-phosphate dehydrogenase (L-gIycerol-3-phosphate: NAD oxidoreductase, E. C. 1.1.1.8) have been resolved by starch gel electrophoresis of extracts of muscle tissue from lake whitefish (Coregonus clupeaformis). The isozyme electropherograms show that three kinds of subunit, A, B, and C, are synthesized in red muscle and two of these, A and B, are also found in white muscle. In red muscle the subunits evidently combine to form catalytically active dimers of the following types: AA, AB, BB, BC, and CC. In white muscle only the AA, AB, and BB dimers were observed.A genetic and molecular structure model is proposed for the glycerol-3-phosphate dehydrogenase (G-3-PDH) isozymes in white muscle of lake whitefish. On the basis of two alleles for A subunits and three alleles for B subunits, the model predicts a total of 18 distinct, electrophoretic G-3-PDH phenotypes for all possible AA, AB, and BB dimeric isozymes. The model has been confirmed by the results of a breeding experiment that tested the heritability of each of the five known alleles. A difference in the rate of heat inactivation of AA and BB isozymes was also interpreted as additional evidence for the unique genetic and molecular nature of the two kinds of subunits.Surveys of natural populations of lake whitefish revealed some marked variations in the frequencies of G-3-PDH alleles in fish from different geographical areas.The cisco (Coregonus artedii) also appears to have three "b" alleles for G-3-PDH.

Development of the embryonic heat shock response and the impact of repeated thermal stress in early stage lake whitefish ( Coregonus clupeaformis ) embryos

2017 ◽  
Vol 69 ◽  
pp. 294-301 ◽  
Author(s):  
Lindy M. Whitehouse ◽  
Chance S. McDougall ◽  
Daniel I. Stefanovic ◽  
Douglas R. Boreham ◽  
Christopher M. Somers ◽  
...  
Keyword(s):  
Thermal Stress ◽  
Heat Shock ◽  
Heat Shock Response ◽  
Early Stage ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Shock Response ◽  
The Impact

Fecundity Comparisons for Various Stocks of Lake Whitefish, Coregonus clupeaformis

1975 ◽  
Vol 32 (3) ◽  
pp. 404-407 ◽  
Author(s):  
M. C. Healey ◽  
C. W. Nicol
Keyword(s):  
Northwest Territories ◽  
Lake Erie ◽  
Fork Length ◽  
Nonlinear Relationship ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Limited Data ◽  
Relative Fecundity ◽  
Great Slave Lake ◽  
The Relationship

We found no significant differences in slope or intercept for the regression of loge fecundity on loge fork length among samples of whitefish from four lakes near Yellowknife in the Northwest Territories. The equation describing the relationship between fecundity and fork length for these populations was:[Formula: see text]Five other populations for which length–fecundity relationships could be calculated had length exponents ranging from 3.20 to 4.38, suggesting a nonlinear relationship between weight and fecundity. Six of the nine populations as well as four others for which limited data were available all had similar relative fecundities. Fish from Buck Lake in Alberta and from Lake Erie had high relative fecundities while fish from Great Slave Lake had low relative fecundity.

Occurrence of the eyefluke, Diplostomum (Diplostomum) baeri bucculentum Dubois et Rausch, 1948, in salmonid fishes of northern British Columbia

1985 ◽  
Vol 63 (2) ◽  
pp. 396-399 ◽  
Author(s):  
Hilda Lei Ching
Keyword(s):  
Rainbow Trout ◽  
Chinook Salmon ◽  
Sockeye Salmon ◽  
Lake Trout ◽  
Infected Fish ◽  
Salmo Gairdneri ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Dolly Varden Salvelinus Malma ◽  
Prosopium Williamsoni

As a result of experimental infections in chicks, diplostomula found in the retina of chinook salmon from the Nechako River were identified as Diplostomum (Diplostomum) baeri bucculentum. Eyeflukes in other salmonids were considered to be the same species based on similar measurements and site in the eyes. These eyeflukes varied in prevalence and mean intensity in seven salmonid species surveyed in nine localities in 1979–1981. The following fish were sampled: rainbow trout (Salmo gairdneri), 505; mountain whitefish (Prosopium williamsoni), 334; lake whitefish (Coregonus clupeaformis), 32; Dolly Varden (Salvelinus malma), 66; lake trout (S. namaycush), 13; kokanee or sockeye salmon (Oncorhynchus nerka), 323; and chinook salmon (O. tshawytscha), 164. Eyeflukes had prevalences ranging from 84 to 100% in six lakes, 64% in the river, 53% in one reservoir site, and a prevalence of 15% in the other reservoir site. Mountain and lake whitefishes had high mean intensities while kokanee had low mean intensities. Correlation of increased intensity with increased fish size was significant for 6 of 27 samples. Four samples of lake whitefish, mountain whitefish, rainbow trout, and chinook salmon showed significant asymmetry when numbers of diplostomula were compared between eyes. More of the heavily infected fish showed asymmetry than did the lightly infected fish.

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