Spatial Correlations of Transferrin Allele Frequencies in Atlantic Salmon (Salmo salar) Populations from North America

1986 ◽  
Vol 43 (5) ◽  
pp. 1074-1078 ◽  
Author(s):  
Eric Verspoor
Keyword(s):  
North America ◽  
Atlantic Salmon ◽  
Allele Frequency ◽  
Salmo Salar ◽  
Allele Frequencies ◽  
Frequency Variation ◽  
Spatial Correlations ◽  
Atlantic Salmon Salmo Salar ◽  
Life History Pattern ◽  
Selective Forces

Existing analyses of spatial patterns of transferrin (Tf) allele frequency variation in anadromous Atlantic salmon (Salmo salar) from rivers in North America have not utilized all available data. Further analysis shows that a latitudinal dine in Tf-4 allele frequency previously reported is an artefact of a major regional difference between populations from Newfoundland/Labrador and those sampled elsewhere. Furthermore, the allele frequencies of populations outside Newfoundland/Labrador show a significant association with the proportion of spawning fish in the populations having spent only one winter at sea. Fequencies in Newfoundland/Labrador are collectively consistent with this relationship but by themselves show no similar correlation. These results, combined with previously reported differences between anadromous and nonanadromous fish, suggest that selective forces, which vary with life history pattern, may operate on the polymorphism.

Age at Sexual Maturity in Icelandic Stocks of Atlantic Salmon (Salmo salar)

1983 ◽  
Vol 40 (9) ◽  
pp. 1456-1468 ◽  
Author(s):  
Dennis L. Scarnecchia
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Sexual Maturity ◽  
Physical Factors ◽  
Thermal Gradients ◽  
Ocean Temperature ◽  
Growth And Survival ◽  
Atlantic Salmon Salmo Salar ◽  
Life History Pattern ◽  
Second Year

For Icelandic stocks of Atlantic salmon (Salmo salar) in 77 rivers, the combination of June ocean temperature, length of river ascended by the salmon, discharge of the river in July–September, and latitude explained much of the variation in percentages of grilse — 72% for females and 62% for males. For both sexes, percentage of grilse was directly related to ocean temperature but inversely related to length of river, discharge of river, and latitude. For stocks in 23 Southwest Coast rivers, length of river explained 72% of the variation in percentage of females that were grilse. Females in stocks south of the thermal gradients separating Atlantic from Arctic or Polar water tended to return as grilse; females north of the gradients tended to return after more than one winter at sea. The decline in percentages of grilse clockwise from southwestern to northeastern rivers corresponded closely with the decline in June ocean temperatures between these areas. I hypothesize that the salmon stocks have adapted their age at sexual maturity to the length and discharge of the rivers, natural mortality rates during their second year at sea, and average expected ocean temperatures, reflecting conditions for growth and survival, that the smolts encounter. Age at maturity appears not to be a direct causal response to any of these physical factors, and appears best understood only with reference to the entire life history pattern of each stock.

Differences in Atlantic Salmon, Salmo salar, from North America and Europe

1972 ◽  
Vol 29 (2) ◽  
pp. 179-185 ◽  
Author(s):  
O. L. Nyman ◽  
J. H. C. Pippy
Keyword(s):  
North America ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
North American ◽  
Serum Proteins ◽  
Fork Length ◽  
Anisakis Simplex ◽  
Atlantic Salmon Salmo Salar

Differences in electropherograms produced by serum proteins and liver esterases were used to identify North American and European Atlantic salmon (Salmo salar) caught at sea. Division of salmon according to continent of origin was supported by mean river age, mean fork length, and abundance of the two parasites Anisakis simplex and Eubothrium crassum. Consistent differences in electrophoretic behaviour of serum proteins and liver esterases in salmon from the two continents support the suggestion that salmon from North America and Europe represent different subspecies.

A minisatellite DNA marker for discriminating between European and North American Atlantic salmon (Salmo salar)

1995 ◽  
Vol 52 (11) ◽  
pp. 2305-2311 ◽  
Author(s):  
John B. Taggart ◽  
Eric Verspoor ◽  
Paul T. Galvin ◽  
Paloma Morán ◽  
Andrew Ferguson
Keyword(s):  
Atlantic Salmon ◽  
Allele Frequency ◽  
Salmo Salar ◽  
North American ◽  
Nuclear Dna ◽  
Dna Marker ◽  
Low Frequency ◽  
Geographic Range ◽  
Minisatellite Dna ◽  
Atlantic Salmon Salmo Salar

A highly discriminatory and practical nuclear DNA genetic marker that can distinguish between Atlantic salmon (Salmo salar) of European and North American origin is described. Screening of 2847 European and 247 North American Atlantic salmon from much of its geographic range for variability at a minisatellite locus, Ssa-A45/2/2, revealed the continental stocks to be almost fixed for two different-sized, easily discernable alleles. Virtually all European Atlantic salmon were homozygous for a 3.00-kb allele (frequency > 0.999), while a smaller 2.77-kb allele (frequency = 0.946) predominated in all North American populations. Whereas the 2.77-kb allele was found exclusively in North American salmon, an allele indistinguishable in size from the 3.00-kb European diagnostic allele was also observed at low frequency (0.036) in North American fish. Eight other continent-specific rare alleles (highest frequency = 0.006) were also observed. The results suggest that little, if any, natural gene flow occurs between the two continental groups of Atlantic salmon.

scholarly journals Comparative genomic analysis of Atlantic salmon, Salmo salar, from Europe and North America

BMC Genetics ◽  
2010 ◽  
Vol 11 (1) ◽  
pp. 105 ◽  
Author(s):  
Krzysztof P Lubieniecki ◽  
Stacy L Jones ◽  
Evelyn A Davidson ◽  
Jay Park ◽  
Ben F Koop ◽  
...  
Keyword(s):  
North America ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Genomic Analysis ◽  
Comparative Genomic Analysis ◽  
Comparative Genomic ◽  
Atlantic Salmon Salmo Salar

A Polymorphism in the Ribosomal RNA Genes Distinguishes Atlantic Salmon (Salmo salar) from North America and Europe

1991 ◽  
Vol 48 (9) ◽  
pp. 1655-1661 ◽  
Author(s):  
Michael G. Cutler ◽  
Sylvia E. Bartlett ◽  
Sheila E. Hartley ◽  
William S. Davidson
Keyword(s):  
North America ◽  
Atlantic Salmon ◽  
Genetic Marker ◽  
Salmo Salar ◽  
Ribosomal Rna ◽  
Nuclear Genome ◽  
Restriction Enzymes ◽  
Good Evidence ◽  
Atlantic Salmon Salmo Salar ◽  
Breeding Populations

There is good evidence to suggest that Atlantic salmon (Salmo salar) from North America and Europe form distinct breeding populations. However, it has been very difficult to discover a genetic marker that allows the continent of origin of an individual salmon to be determined unambiguously. Repetitive elements in the nuclear genome have provided population-specific markers in several species. Therefore, we examined the ribosomal RNA gene (rDNA) complex in Atlantic salmon by Southern blot analysis using a cloned repeating unit of the Drosophila melanogaster rDNA as a probe. A restriction fragment length polymorphism that could distinguish between salmon from Newfoundland and Scotland was detected using a combination of the restriction enzymes SacI and XbaI. The Newfoundland salmon had additional fragments of 3.6 kilobase pairs (kbp) and 2.6 kbp. Of 27 salmon from 10 populations in Europe, none possessed the 3.6- or the 2.6-kbp fragment whereas all 33 North American Atlantic salmon (from six populations) had the 2.6-kbp band and the majority showed the 3.6-kbp fragment. This preliminary survey strongly suggests that this genetic marker can be used to identify the continent of origin of individual Atlantic salmon.

scholarly journals Cost-effective genome-wide estimation of allele frequencies from pooled DNA in Atlantic salmon (Salmo salar L.)

BMC Genomics ◽  
2013 ◽  
Vol 14 (1) ◽  
pp. 12 ◽  
Author(s):  
Mikhail Ozerov ◽  
Anti Vasemägi ◽  
Vidar Wennevik ◽  
Eero Niemelä ◽  
Sergey Prusov ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Cost Effective ◽  
Allele Frequencies ◽  
Atlantic Salmon Salmo Salar ◽  
Genome Wide ◽  
Pooled Dna

Pomphorhynchus laevis (Zoega) Müller, 1776 (Acanthocephala) in Atlantic Salmon (Salmo salar) and Its Use as a Biological Tag

1969 ◽  
Vol 26 (4) ◽  
pp. 909-919 ◽  
Author(s):  
John H. C. Pippy
Keyword(s):  
North America ◽  
Atlantic Salmon ◽  
Intermediate Host ◽  
Salmo Salar ◽  
Juvenile Salmon ◽  
British Isles ◽  
Intermediate Hosts ◽  
England And Wales ◽  
Pomphorhynchus Laevis ◽  
Atlantic Salmon Salmo Salar

Pomphorhynchus laevis (Zoega) Müller, 1776, an acanthocephalan, occurred in 25.4% of 974 juvenile Atlantic salmon (Salmo salar) from 18 drainage systems in the British Isles and was absent in 1063 juvenile salmon from 36 systems in North America. Its incidence in Irish smolts was about 25 times that in Scotland, England, and Wales. A comparison of its distribution with that of potential intermediate hosts in the British Isles suggests that the amphipod Gammarus duebeni is the intermediate host in Ireland and Gammarus pulex pulex in Scotland, England, and Wales. Pomphorhynchus laevis seems to be useful for indicating the tributary of origin of salmon smolts in several Irish rivers. Its usefulness as a tag for Irish salmon on the high seas is not yet established.

Sign in / Sign up

Export Citation Format

Share Document