Lake Whitefish (Coregonus clupeaformis) Stocks of the Ontario Waters of Lake Huron

1981 ◽  
Vol 38 (12) ◽  
pp. 1772-1789 ◽  
Author(s):  
J. M. Casselman ◽  
J. J. Collins ◽  
E. J. Grossman ◽  
P. E. Ihssen ◽  
G. R. Spangler
Keyword(s):  
Growth Rate ◽  
Genetic Distances ◽  
Lake Huron ◽  
Starch Gel Electrophoresis ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Meristic Characters ◽  
Hardy Weinberg Equilibrium ◽  
Starch Gel ◽  
South Shore

Historical and contemporary data on lake whitefish (Coregonus clupeaformis) from the Ontario waters of Lake Huron were examined for evidence of stocks with the objective of defining population boundaries. We delineated the spatial distribution of five stocks from tag–recapture data and the general location of six additional stocks on the basis of population parameters such as growth rate, age structure, and abundance trends.Samples of fish collected (summer and fall) from 5 of the 11 potential stocks were evaluated on the basis of 11 morphometric and 7 meristic characters. We also examined osseometric features such as shape of scales and otoliths, and electrophoretic characteristics at 32 loci associated with 12 enzyme systems.The summer and fall samples for each group were generally not significantly different. For the phenotypes examined electrophoretically, each stock was in Hardy–Weinberg equilibrium; 12 of the 32 loci considered were polymorphic and 4 of the 10 possible genetic distances differed significantly from zero.The Inner Basin stock was distinctly different from all other stocks. The Blind River stock was also found to be different by osseometrics, but not by morphometrics or electrophoresis. Osseometrics separated the stocks by basin of origin. Two stocks, Outer Basin and Burnt Island, appeared to be the most similar and could be separated from each other only on the basis of growth rate and tagging data. These two stocks are adjacent to each other in the main basin of Lake Huron, along the south shore of Manitoulin Island.Whitefish stocks of Lake Huron represent groups of fish that differ phenotypically and genotypically in varying degrees, are spatially separated, and behave as cohesive units. We conclude that they should be regarded as functional units for management purposes.Key words: lake whitefish, Coregonus clupeaformis, Lake Huron, stocks, tag–recapture data, population structure, morphometrics, meristics, osseometrics, scale and otolith shape, starch gel electrophoresis, biochemical genetic variation

A Hermaphroditic Lake Whitefish, Coregonus clupeaformis, from Lake Huron

1974 ◽  
Vol 31 (12) ◽  
pp. 1944-1945 ◽  
Author(s):  
T. R. Porter ◽  
S. Corey
Keyword(s):  
Growth Rate ◽  
Normal Growth ◽  
Lake Huron ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
External Characteristics

A hermaphroditic lake whitefish, Coregonus clupeaformis, caught in Lake Huron is described. The specimen had a normal growth rate and had no apparent abnormal external characteristics. Both gonads were ovotestes. The ovarian and testicular portions appeared to be functional and developing normally.

scholarly journals PROTEIN POLYMORPHISMS, SEGREGATION IN GENETIC CROSSES AND GENETIC DISTANCES AMONG FISHES OF THE GENUS XIPHOPHORUS (POECILIIDAE)

Genetics ◽  
1982 ◽  
Vol 102 (3) ◽  
pp. 539-556
Author(s):  
Don C Morizot ◽  
Michael J Siciliano
Keyword(s):  
Goodness Of Fit ◽  
Inbred Strains ◽  
Interspecific Backcross ◽  
Genetic Distances ◽  
Rapid Expansion ◽  
Starch Gel Electrophoresis ◽  
Lower Vertebrate ◽  
Protein Coding ◽  
Group I ◽  
Starch Gel

ABSTRACT The products of 49 protein-coding loci were examined by starch gel electrophoresis for populational variation in six species of Xiphophorus fishes and/or segregation in intra- and interspecific backcross and intercross hybrids. Electrophoretic variation was observed for 29 of the 35 locus products in a survey of 42 population samples. The highest frequency of polymorphic loci observed in noninbred populations was 0.143. After ten or more generations of inbreeding, all loci studied were monomorphic. Inbred strains generally exhibited the commonest electrophoretic alleles of the population from which they were derived. An assessment of genetic distances among Xiphophorus populations reflected classical systematic relationships and suggested incipient subspeciation between X. maculatus from different drainages as well as several species groups. Thirty-three loci were analyzed with respect to segregation in hybrids. The goodness of fit of segregations to Mendelian expectations at all loci analyzed (except loci in linkage group I) is interpreted as evidence for high genetic compatibility of the genomes of Xiphophorus species. It is anticipated that these data will result in a rapid expansion of the assignment of protein-coding loci to linkage groups in these lower vertebrate species.

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.

scholarly journals Genetic polymorphism of milk protein loci in Argentinian Holstein cattle

2000 ◽  
Vol 23 (4) ◽  
pp. 819-823 ◽  
Author(s):  
Adriana Gloria Bonvillani ◽  
Miguel Angel Di Renzo ◽  
Iván Nicolás Tiranti
Keyword(s):  
Genetic Polymorphism ◽  
Milk Protein ◽  
Genotypic Diversity ◽  
Genetic Distances ◽  
Holstein Cattle ◽  
Starch Gel Electrophoresis ◽  
Beta Casein ◽  
Hardy Weinberg Equilibrium ◽  
Quality Of Milk ◽  
Beta Lactoglobulin

Some alleles of milk protein loci are associated with superior cheese production characteristics. The genetic polymorphism of the milk protein loci alphas1-casein, beta-casein, k-casein and beta-lactoglobulin was examined in Argentinian Holstein cattle. Samples from 12 herds of four regions of Córdoba were analyzed by starch gel electrophoresis. The chi² test was used to assess whether the populations were in Hardy-Weinberg equilibrium. Genotypic diversity was analyzed by the Shannon-Weaver index. The observed genotypic frequencies were analyzed by Hedrick's genetic identity and the genetic distance of Balakrishnan and Sanghvi. The allelic and genotypic frequencies were similar to those of other Holstein populations. The genotypic frequencies of the alphas1-casein and beta-casein loci were in equilibrium, whereas in some populations the k-casein and beta-lactoglobulin loci were not. According to the Shannon-Weaver index the total genetic diversity within each herd was greater than 96%. The high values of identity agreed with the low genetic distances among populations. We conclude that there is extensive genetic homogeneity in Holstein cattle in Córdoba Province and that it would be feasible to select for B alleles at the k-casein and b-lactoglobulin loci in order to improve the quality of milk available for cheese manufacturing.

Genetic structure of lake whitefish, Coregonus clupeaformis, populations in the northern main basin of Lake Huron

2012 ◽  
Vol 63 ◽  
pp. 241-260
Author(s):  
W. Stott ◽  
M.P. Ebener ◽  
L. Mohr ◽  
J. Schaeffer ◽  
E.F. Roseman ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Lake Huron ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Main Basin

Extending DNA barcoding coverage for Lake Whitefish (Coregonus clupeaformis) across the three major basins of Lake Huron

DNA Barcodes ◽  
2015 ◽  
Vol 3 (1) ◽  
Author(s):  
Lauren M. Overdyk ◽  
Heather E. Braid ◽  
Stephen S. Crawford ◽  
Robert H. Hanner
Keyword(s):  
Dna Barcoding ◽  
Lake Huron ◽  
Coi Gene ◽  
Sampling Effort ◽  
Coregonus Clupeaformis ◽  
Dna Barcodes ◽  
Lake Whitefish ◽  
Life Data ◽  
New Perspective ◽  
St Lawrence River

AbstractDNA barcoding is a useful tool for both species identification and discovery, but the latter requires denser sampling than typically used in barcode studies. Lake Whitefish (Coregonus clupeaformis) is a valuable species, fished traditionally, commercially, and recreationally in Lake Huron. Based on the natural geographic and bathymetric separation of the three major basins in Lake Huron, the potential separation of Lake Whitefish within these basins, and the variation among life history (early and late spawning), we predicted that Lake Huron might harbour cryptic lineages of Lake Whitefish at the basin level. To test this prediction, DNA barcodes of the mitochondrial 5’ cytochrome c oxidase subunit I (COI) gene sequences were recovered from spawning phase Lake Whitefish (n = 5 per site), which were collected from sites (n = 28) around Lake Huron during Fall 2012. These sequences, combined with other publically available DNA barcodes from the Barcode of Life Data System (BOLD), revealed twelve unique haplotypes across North America, with seven unique to Lake Huron. The dominant haplotype was found throughout Lake Huron and east to the St. Lawrence River. No deep divergences were revealed. This comprehensive lake-wide sampling effort offers a new perspective on C. clupeaformis, and can provide insight for environmental assessments and fisheries management.

Genetic Variation in Yellow Nutsedge (Cyperus esculentus)

Weed Science ◽  
1987 ◽  
Vol 35 (4) ◽  
pp. 506-512 ◽  
Author(s):  
Michael J. Horak ◽  
Jodie S. Holt ◽  
Norman C. Ellstrand
Keyword(s):  
Genetic Diversity ◽  
Genotypic Diversity ◽  
Genetic Distances ◽  
Cyperus Rotundus ◽  
Starch Gel Electrophoresis ◽  
Cyperus Esculentus ◽  
Purple Nutsedge ◽  
Yellow Nutsedge ◽  
Low Genetic Diversity ◽  
Starch Gel

Genetic diversity within and among populations of yellow nutsedge (Cyperus esculentusL. # CYPES) was analyzed to evaluate and quantify the genetic consequences of the reported predominance of asexually-produced tubers as colonizing agents. Ten populations were examined using starch gel electrophoresis for allozyme analysis. Four populations of purple nutsedge (Cyperus rotundusL. # CYPRO) were surveyed for comparison. Twelve loci were identified in yellow nutsedge among the eight enzyme systems examined; ten of these loci were found in purple nutsedge. Yellow nutsedge showed relatively low genetic diversity. Most of the genetic diversity occurred as differences among individuals within populations (Hs), compared to differences among populations (Dst) for the four variable loci identified in this species. Thus, most genetic distancesbetween its populations were small. Generally, only a few genotypes occurred within each population. Purple nutsedge was found to possess even lower within- and among-population gene and genotypic diversity. This study supports the view that tubers account for most of the establishment of new populations of both species.

Assessment of the United States Lake Whitefish (Coregonus clupeaformis) Fisheries of Lake Superior, Lake Michigan, and Lake Huron

1976 ◽  
Vol 33 (4) ◽  
pp. 747-759 ◽  
Author(s):  
A. L. Jensen
Keyword(s):  
Lake Michigan ◽  
Lake Superior ◽  
The United States ◽  
Sea Lamprey ◽  
Maximum Sustainable Yield ◽  
Lake Huron ◽  
Production Model ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Surplus Production Model

The logistic surplus production model is applied to lake whitefish (Coregonus clupeaformis) yield and effort data from Lake Superior, Lake Michigan, and Lake Huron. The fitted models indicate that the whitefish populations in most areas of the lakes have been overexploited, and that in these areas yield was below the maximum sustainable yield before sea lamprey (Petromyzon marinus) predation took its toll. In some areas of Lake Superior the whitefish populations are not overexploited. The sea lamprey is the apparent cause of the drastic decrease in the whitefish population that occurred in northern Lake Michigan during the 1950’s.

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.

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