scholarly journals The demographic history of Atlantic salmon (Salmo salar ) across its distribution range reconstructed from approximate Bayesian computations*

Evolution ◽  
2018 ◽  
Vol 72 (6) ◽  
pp. 1261-1277 ◽  
Author(s):  
Quentin Rougemont ◽  
Louis Bernatchez
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Demographic History ◽  
Distribution Range ◽  
Atlantic Salmon Salmo Salar ◽  
History Of ◽  
Approximate Bayesian

Impact of Recent Economic Growth and Industrial Development on the Ecology of Northwest Miramichi Atlantic Salmon (Salmo salar)

1974 ◽  
Vol 31 (5) ◽  
pp. 521-544 ◽  
Author(s):  
Paul F. Elson
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Industrial Development ◽  
Pollution Abatement ◽  
Commercial Fishing ◽  
Metal Mining ◽  
Atlantic Salmon Salmo Salar ◽  
Recent Developments ◽  
History Of ◽  
Chemical Conditions

The history of Atlantic salmon (Salmo salar) runs of the Northwest Miramichi from 1950 to 1973 is reviewed. Decreases in these runs are related to degrading of ecological conditions in the river's rearing reaches as a result of adverse chemical conditions attributable to recent developments in forest management and to base metal mining. Diversion of indigenous adult stocks into other streams of the system as a result of pollution of the home stream by mining, pulpmill, and other human activities is examined and evaluated. Increase of commercial catches as a result of pollution-caused delay in the estuary of migrating adults is analyzed. Grave depletion of stocks as a result of the combined effects of these factors plus distant-water fishing is identified, as is incipient recovery of stocks when home-water commercial fishing was eliminated and pollution abatement measures were introduced to the river. A suppressing effect of heavy angling pressure on stock abundance when stocks are low is noted.

scholarly journals Reconstructing the demographic history of Atlantic Salmon (Salmo salar) across its distribution range using Approximate Bayesian Computations

2017 ◽  
Author(s):  
Quentin Rougemont ◽  
Louis Bernatchez
Keyword(s):  
North America ◽  
Atlantic Salmon ◽  
Northern Hemisphere ◽  
Demographic History ◽  
Secondary Contact ◽  
Population Divergence ◽  
Isolated Populations ◽  
Quaternary Period ◽  
History Of ◽  
Approximate Bayesian

AbstractUnderstanding the dual roles of demographic and selective processes in the buildup of population divergence is one of the most challenging tasks in evolutionary biology. In the Northern hemisphere in particular, species genetic makeup has been largely influenced by severe climatic oscillations of the Quaternary Period. Here, we investigated the demographic history of Atlantic Salmon across the entire species range using 2035 anadromous individuals from 77 sampling sites from North America and Eurasia genotyped at 4,656 SNPs. By combining results from admixture graphs, geogenetic maps and an approximate Bayesian computation framework, we validate previous hypotheses pertaining to secondary contact between European and Northern American populations, but also demonstrate that European populations from different glacial refugia have been exchanging alleles in contemporary times. We further identify the major sources of admixture from the southern range of North America to more northern populations along with a strong signal of secondary gene flow between genetic regional groups. We hypothesize that these patterns reflects the spatial redistribution of ancestral variation across the entire American range. Results also point to a role for linked selection in the form of background selection and or positive hitchhiking. Altogether, differential introgression and linked selective effects likely played an underappreciated role in shaping the genomic landscape of species in the Northern hemisphere Therefore we conclude that such heterogeneity among loci should be systematically integrated into demographic inferences of the divergence process, even between incompletely reproductively isolated populations.

Origin and life history of Atlantic salmon (Salmo salar) near their northernmost oceanic limit

2014 ◽  
Vol 71 (11) ◽  
pp. 1740-1746 ◽  
Author(s):  
Arne J. Jensen ◽  
Sten Karlsson ◽  
Peder Fiske ◽  
Lars Petter Hansen ◽  
Gunnel M. Østborg ◽  
...  
Keyword(s):  
Climate Change ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
The Arctic ◽  
Genetic Assignment ◽  
Atlantic Salmon Salmo Salar ◽  
The Arctic Ocean ◽  
History Of ◽  
Genetic Profiles ◽  
Rule Out

138 Atlantic salmon (Salmo salar) captured in the Advent Fjord off Svalbard were genetically assigned to two main clusters of European salmon. Two-thirds were assigned to salmon rivers in Finnmark (the northernmost county in Norway) and the rest to salmon rivers further south in Norway. The genetic assignment was based on genetic profiles from 60 Norwegian rivers. The two clusters correspond to two larger genetic groupings: the Barents–White seas and Atlantic groupings. Thus, we cannot rule out other populations from these groupings as sources of Atlantic salmon at Svalbard. Svalbard salmon assigned to the two genetic groupings differed in ecological and phenological traits, with highest smolt age and lowest postsmolt growth in the Finnmark salmon cluster. High smolt ages in both groups, however, suggest a northern origin of most individuals in the sample. Although Atlantic salmon have sporadically been observed in the Arctic Ocean at earlier times, the high abundance outlined here seems to be a recent phenomenon, suggesting a northward penetration caused by climate change.

Microstructure and texture of fresh and smoked Atlantic salmon, Salmo salar L., fillets from fish reared and slaughtered under different conditions

2001 ◽  
Vol 32 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Sjofn Sigurgisladottir ◽  
Margret S. Sigurdardottir ◽  
Helga Ingvarsdottir ◽  
Ole J. Torrissen ◽  
Hannes Hafsteinsson
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar
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