scholarly journals Sculpin Cottus cf. poecilopus Heckel, 1837 in Baikal Lake Basin: First Findings

Author(s):  
R. S. Andreev ◽  
◽  
A. N. Matveev ◽  
V. P. Samusenok ◽  
A. L. Yuriev ◽  
...  

For the first time for the Baikal Lake basin, evidence of the existence of populations of sculpin Cottus cf. poecilopus Heckel (alpine bullhead) characteristic of the adjacent Lena River basin in large northern Baikal tributaries, the Verkhnaya (Upper) Angara and the Kichera is provided. In June 2009 during the study of the lower reaches of the Kholodnaya River (Kichera-Baikal system), 8 individuals of sculpin aged from 3 to 5 years and in August 2009 5 more specimens aged from 4 to 6 were caught. All fish were fertile with the gonads in maturity stage III. In August 2010 33 individuals aged from 4 to 6 were collected in the main channel of the Upper Angara near Novy Uoyan settl.. At about the same time C.poecilopus was registered in stomachs of Arctic charr from Lake Amut (Churo-Upper Angara-Baikal system) near the divide with the Pravaya (Right) Mama (Mama-Vitim-Lena system). In August 2010 17 specimens aged from 1 to 4 were caught in the Upper Angara near the mouth of its large left tributary the Yanchui River. Sculpins from the rivers Kholodnaya, Upper Angara and Yanchui have higher growth rate as compared to the ones from mountain lakes of the upper Lena basin. About 90 % of males and females matured at the age of 3 years. Absolute fecundity of two females from the Upper Angara River was 149 and 556 (with a mean of 352,5) eggs and of two females from the Kholodnaya River, 223 and 305 (with a mean of 264) eggs. This exceeds the fecundity of sculpins from mountain lakes in the Lena part of Baikal rift zone, which averages less than 150 eggs. Sculpins spawn in the Kholodnaya River in the 1st half of June. The diet of C. cf. poecilopus all over the Baikal basin as well as in adjacent sites in the Lena basin was basically composed of larvae of amphibious insects (trichopterans, ephemeropterans, chironomids and plecopterans). The discovery of the third species from the Lena basin in the Baikal basin following the findings of Arctic charr Salvelinus alpinus and grayling Thymallus baicalolenensis evidences the absence of differences in the structure of ichthyofaunas of the upper parts of both neighboring basins. Sculpins permeate along the streams to mountain lakes more easily than other species and colonize the most elevated ones in lake cascades within the northern part of Baikal rift zone. Their dispersal across the divide could proceed in two ways: via headwater captures or via flattened passes between converging upper reaches of adjacent streams.

Geografie ◽  
1997 ◽  
Vol 102 (2) ◽  
pp. 89-97
Author(s):  
Bohumír Janský

The article characterizes the formation and development of the Baikal Lake Basin, situated in the south of Eastern Siberia. Attention is also paid to processes of tectonic development of the Baikal region which have influenced the deepening of the Baikal Basin. The author studies in the same time erosional-denudational processes influencing the lake basin formation.


2006 ◽  
Vol 46 (8) ◽  
pp. 587-599 ◽  
Author(s):  
V. P. Samusenok ◽  
S. S. Alekseyev ◽  
A. N. Matveev ◽  
N. V. Gordeeva ◽  
A. L. Yur’ev ◽  
...  

2019 ◽  
Vol 484 (3) ◽  
pp. 325-328
Author(s):  
А. B. Kotov ◽  
T. M. Skovitina ◽  
V. P. Kovach ◽  
E. V. Sklyarov ◽  
T. V. Donskaya ◽  
...  

U–Th–Pb geochronological (LA-ICP-MS) stady the detritе zircons from the Late Cainozoic sands of the Olkhon island (the Baikal rift zone) were performed. It is shown that the early Paleozoic magmatic and metamorphic complexes of the Olkhon terrein of the Central Asian Mobile Belt and the Late Carbonian – the Early Permian granitoids of the Angaro-Vitimsky batholith were the main their sources. Transfer of granitoids of the Angaro- Vitimsky batholith were the main their sources. Transfer of the last was carried out on distance not less than 100 km. The assumption is made that it happened by powerful air transfer, and including on ice of Baikal Lake.


2018 ◽  
Vol 2 ◽  
pp. 140-147
Author(s):  
L.A. Nazarov ◽  
◽  
L.A. Nazarova ◽  
N.A. Miroshnichenko ◽  
A.V. Panov ◽  
...  

1988 ◽  
Vol 23 (2) ◽  
pp. 301-307 ◽  
Author(s):  
L.A. Hunter ◽  
E. Scherer

Abstract Arctic charr (Salvelinus alpinus L.) were exposed to five levels of acidity between pH 6 and pH 3.8. Swimming performance as determined by critical swimming speeds was 67.5 cm · sࢤ1 or 4.4 body lengths per second for untreated fish (pH 7.8). Performance declined sharply below pH 4.5; at pH 3.8 it was reduced by 35% after 7 days of exposure. Tailbeat frequencies and ventilation rates showed no dose-response effects. At swimming speeds between 20 and 50 cm · sࢤ1, ventilation rates at all levels of acidity were higher than at the control level.


Ecotoxicology ◽  
2020 ◽  
Vol 29 (9) ◽  
pp. 1327-1346
Author(s):  
Mackenzie Anne Clifford Martyniuk ◽  
Patrice Couture ◽  
Lilian Tran ◽  
Laurie Beaupré ◽  
Nastassia Urien ◽  
...  

Animals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 899
Author(s):  
Fotis Pappas ◽  
Christos Palaiokostas

Incorporation of genomic technologies into fish breeding programs is a modern reality, promising substantial advances regarding the accuracy of selection, monitoring the genetic diversity and pedigree record verification. Single nucleotide polymorphism (SNP) arrays are the most commonly used genomic tool, but the investments required make them unsustainable for emerging species, such as Arctic charr (Salvelinus alpinus), where production volume is low. The requirement to genotype a large number of animals for breeding practices necessitates cost effective genotyping approaches. In the current study, we used double digest restriction site-associated DNA (ddRAD) sequencing of either high or low coverage to genotype Arctic charr from the Swedish national breeding program and performed analytical procedures to assess their utility in a range of tasks. SNPs were identified and used for deciphering the genetic structure of the studied population, estimating genomic relationships and implementing an association study for growth-related traits. Missing information and underestimation of heterozygosity in the low coverage set were limiting factors in genetic diversity and genomic relationship analyses, where high coverage performed notably better. On the other hand, the high coverage dataset proved to be valuable when it comes to identifying loci that are associated with phenotypic traits of interest. In general, both genotyping strategies offer sustainable alternatives to hybridization-based genotyping platforms and show potential for applications in aquaculture selective breeding.


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