Genetic Analysis of North American Populations of the Pink Salmon, Oncorhynchus gorbuscha, Possible Evidence for the Neutral Mutation-Random Drift Hypothesis

Evolution ◽  
1974 ◽  
Vol 28 (2) ◽  
pp. 295 ◽  
Author(s):  
Nevin Aspinwall
Keyword(s):  
Genetic Analysis ◽  
North American ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Random Drift ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Neutral Mutation

scholarly journals GENETIC ANALYSIS OF DUPLICATE MALATE DEHYDROGENASE LOCI IN THE PINK SALMON, ONCORHYNCHUS GORBUSCHA

Genetics ◽  
1974 ◽  
Vol 76 (1) ◽  
pp. 65-72
Author(s):  
Nevin Aspinwall
Keyword(s):  
Genetic Analysis ◽  
Malate Dehydrogenase ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Limited Evidence ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
A Subunit ◽  
B Subunits ◽  
Duplicate Loci

ABSTRACT The results of breeding experiments with the pink salmon, Oncorhynchus gorbuscha, indicate that s-MDH-A and s-MDH-B subunits are each encoded by duplicate loci. Limited evidence suggests also that the two loci encoding for the s-MDH-A subunit are each polymorphic and linked or pseudolinked.

A genetic analysis of body size in pink salmon (Oncorhynchus gorbuscha)

Genome ◽  
1988 ◽  
Vol 30 (1) ◽  
pp. 31-35 ◽  
Author(s):  
Terry D. Beacham ◽  
Clyde B. Murray
Keyword(s):  
Body Size ◽  
Genetic Analysis ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Male Body ◽  
Male Size ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Male Body Size ◽  
Size Classes ◽  
Heritability Estimates

Two small-sized and two large-sized male pink salmon (Oncorhynchus gorbuscha) were mated to each of four females, producing eight families sired by small males and eight sired by large males. The juveniles were reared for 500 d after fry emergence. Juvenile weight in the two male size classes was similar until the spring of the year of maturity, when juveniles sired by large males grew faster than those sired by small ones. Heritability estimates of weight based upon the dam component of variance increased during 500 d of rearing from 0.4 to 0.8. Heritability of weight based upon the sire component of variance generally ranged between 0.1 and 0.3. The large variation in male body size in spawning pink salmon populations may have resulted from different male breeding strategies.Key words: heritability, salmon, body size.

Random Movement and Orientation in Pink Salmon (Oncothynchus gorbuscha) Migrations

1989 ◽  
Vol 46 (6) ◽  
pp. 1062-1066 ◽  
Author(s):  
Kazuhiko Hiramatsu ◽  
Yukimasa Ishida
Keyword(s):  
North American ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Random Movement ◽  
The North ◽  
Oriented Movement ◽  
The Mean ◽  
Using Data ◽  
Model Fish

The homing migration of pink salmon (Oncorhynchus gorbuscha) from the open ocean towards their natal rivers was studied by a mathematical model using data from tagging experiments. In this model fish migration was considered to be the resultant of fish orientation and random movement. The mean migration speed and dispersion coefficient (an index of random movement) evaluated from regression analysis were 19.6 km∙d−1 and 739 km2∙d−1 for the North American group and 47.1 km∙d−1 and 863 km2∙d−1 for the East Kamchatkan group, respectively. The results indicated that pink salmon migration has more oriented movement than had been suggested by a previous computer simulation by other workers. The results also indicated that there is a distinct difference in the migratory behavior of North American and East Kamchatkan pink salmon.

Electrophoretic Characterization of Odd-Year Pink Salmon (Oncorhynchus gorbuscha) Populations from the Pacific Coast of Russia, and Comparison with Selected North American Populations

1994 ◽  
Vol 51 (S1) ◽  
pp. 158-171 ◽  
Author(s):  
James B. Shaklee ◽  
Natalya V. Varnavskaya
Keyword(s):  
North America ◽  
North American ◽  
Pacific Coast ◽  
Minimum Spanning Tree ◽  
Allelic Variation ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Significant Heterogeneity ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
The Pacific

We collected and electrophoretically analyzed a total of 558 fish from eight locations along the Pacific Coast of Russia. We successfully screened 44 enzyme-coding loci: 14 loci were polymorphic at the 0.95 level in at least one collection, an additional eight were polymorphic at the 0.99 level but not at the 0.95 level, and the remaining 22 were either monomorphic or exhibited only very rare variation in these collections. Contingency χ2 tests using the 23 most variable loci revealed significant heterogeneity among all eight collections (p = 0.028) but little or no significant heterogeneity among collections within areas (northeastern Kamchatka peninsula, p = 0.180; southwestern Kamchatka, p = 0.533; and mainland adjacent to the northwestern Sea of Okhotsk, p = 0.071). Multidimensional scaling and minimum spanning tree analyses using genetic distances among collections indicated that geographic proximity of spawning sites was not associated with genetic similarity. The eight odd-year pink salmon (Oncorhynchus gorbuscha) collections from Russia were compared with 16 collections from North America (southeastern Alaska, British Columbia, and Washington) using data for 33 loci. The Russian populations differed from the North American populations in their patterns of allelic variation at many loci. The amount of genetic differentiation among populations from different rivers in Russia was comparable to that seen within similar-sized areas in North America.

Genetic analysis of growth and maturity in pink salmon (Oncorhynchus gorbuscha)

Genome ◽  
1988 ◽  
Vol 30 (4) ◽  
pp. 529-535 ◽  
Author(s):  
Terry D. Beacham ◽  
Clyde B. Murray
Keyword(s):  
British Columbia ◽  
Genetic Analysis ◽  
Growth Rates ◽  
Variance Components ◽  
Sexual Maturity ◽  
Pink Salmon ◽  
Genetic Component ◽  
Oncorhynchus Gorbuscha ◽  
Late Winter ◽  
Pink Salmon Oncorhynchus Gorbuscha

Variation in growth and sexual maturity was examined for five stocks of pink salmon (Oncorhynchus gorbuscha) spawning at different times in British Columbia. In each stock, four males were mated with eight females in a nested breeding design, and the juveniles were reared for 500 d after fry emergence. Adults in early-spawning northern stocks were smaller than those in late-spawning southern ones, but pink salmon from northern stocks had faster growth rates than those from southern ones. The relative ranking within stocks of family weight remained constant after late winter in the year of maturity. Heritability of weight based upon sire variance components was usually greater than 0.9 after 150 d of rearing. Pink salmon from the earlier-spawning stocks were in a more advanced state of sexual maturity when the experiment was terminated than were those from later-spawning stocks, indicative of a significant genetic component in timing of sexual maturity.Key words: Oncorhynchus, salmon, growth rates, sexual maturity.

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