Mean multiannual temperature regime of the surface water layer in the near-shore regions of the White Sea

Tolstikov, A. V.; Petrov, M P

doi:10.1134/s0001437006030039

Cited by 2 publications

(3 citation statements)

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“…Given the prolonged isolation of freshwater salmon, it is likely that they have evolved a number of unique traits (in addition to G. salaris resistance) compared to populations in the rest of the range, including variation in the smoltification process (Kiiskinen et al, 2003;Nilsen et al, 2008Nilsen et al, , 2003 and other physiological functions (Peng et al, 2003) likely resulting from adaptation to a freshwater lifestyle. Water temperature profiles also differ between freshwater northwest Russian lakes and the northern Atlantic Ocean, with both the river water temperature during salmon development and the water temperature of salmon feeding grounds in lakes Ladoga and Onega being generally warmer (Naumenko et al, 1996;Tolstikov and Petrov, 2006). While temperature is known to affect metabolic and developmental rates (Brown et al, 2004;Gillooly et al, 2001), it also greatly influences food availability and trophic networks (Winder and Schindler, 2004) as well as pathogen diversity (Adlard et al, 2015;Dionne et al, 2007) and thus is likely to be a strong selective force both in lakes and the ocean.…”

Section: Introductionmentioning

confidence: 99%

Genomic signatures of parasite-driven natural selection in north European Atlantic salmon (Salmo salar)

et al. 2018

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Understanding the genomic basis of host-parasite adaptation is important for predicting the long-term viability of species and developing successful management practices. However, in wild populations, identifying specific signatures of parasite-driven selection often presents a challenge, as it is difficult to unravel the molecular signatures of selection driven by different, but correlated, environmental factors. Furthermore, separating parasite-mediated selection from similar signatures due to genetic drift and population history can also be difficult.Populations of Atlantic salmon (Salmo salar L.) from northern Europe have pronounced differences in their reactions to the parasitic flatworm Gyrodactylus salaris Malmberg 1957 and are therefore a good model to search for specific genomic regions underlying interpopulation differences in pathogen response. We used a dense Atlantic salmon SNP array, along with extensive sampling of 43 salmon populations representing the two G. salaris response extremes (extreme susceptibility vs resistant), to screen the salmon genome for signatures of directional selection while attempting to separate the parasite effect from other factors. After combining the results from two independent genome scan analyses, 57 candidate genes potentially under positive selection were identified, out of which 50 were functionally annotated. This candidate gene set was shown to be functionally enriched for lymph node development, focal adhesion genes and anti-viral response, which suggests that the regulation of both innate and acquired immunity might be an important mechanism for salmon response to G. salaris. Overall, our results offer insights into the apparently complex genetic basis of pathogen susceptibility in salmon and highlight methodological challenges for separating the effects of various environmental factors.

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Section: Introductionmentioning

confidence: 99%

Genomic signatures of parasite-driven natural selection in north European Atlantic salmon (Salmo salar)

et al. 2018

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“…Collection sites varied from very low salinity brackish areas (<5 psu) to exposed open coasts with salinity >25 psu. The temperature regime of surface waters in near-shore coastal areas varies annually from -1.8 to 18.7°C (Tolstikov and Petrov 2006). A variety of habitats were sampled by routine inspection of shorelines and dredging of subtidal kelp and Fucus beds (Table 1).…”

Section: Methodsmentioning

confidence: 99%

“…1.5 m tidal amplitudes, to salt marshes covering many hectares. While the White Sea lies on the Arctic Circle, summer surface temperatures can reach 18°C, and ice conditions are limited to 4-5 months in winter and spring (Tolstikov and Petrov 2006). A significant constraint on algal growth at high latitudes is the relative absence of light from late fall through winter months (Wiencke et al 2007, Wulff et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Marine macroalgae and associated flowering plants from the Keret Archipelago, White Sea, Russia

Garbary¹,

Tarakhovskaya²

2013

ALGAE

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The marine algal flora of the Keret Archipelago (66° N, 33° E) in the White Sea, Russia was investigated during 2008. Over 250 algal records from more than 15 islands and several sites on the adjoining mainland produced a total of 62 algal species. This raised the total from 56 to 88 species of Chlorophyta (23 species), Phaeophyceae (31 species), Rhodophyta (33 species), and Tribophyceae (1 species) of which seven were new records or verifications of ambiguous records for the White Sea and 11 species are new for the Keret Archipelago. The new or confirmed records included species of Blidingia, Eugomontia, Prasiola, Rosenvingiella, and Ulothrix (Chlorophyta), Acrochaetium, Colaconema (Rhodophyta), and Vaucheria (Tribophyceae). Five species of flowering plants (Aster, Plantago, Triglochin, and Zostera) were associated with the macrophytic algal vegetation of the region. Five fucoid algae in Pelvetia, Fucus, and Ascophyllum provide a picture of a temperate flora. Regardless, the overall species richness is consistent with an arctic nature to the flora. This discrepancy is attributed to the 'filter' provided by the Barents Sea of the Arctic Ocean for post-glacial colonization of the White Sea.

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Mean multiannual temperature regime of the surface water layer in the near-shore regions of the White Sea

Cited by 2 publications

References 1 publication

Genomic signatures of parasite-driven natural selection in north European Atlantic salmon (Salmo salar)

Genomic signatures of parasite-driven natural selection in north European Atlantic salmon (Salmo salar)

Marine macroalgae and associated flowering plants from the Keret Archipelago, White Sea, Russia

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