Biometrical study of Choanomphalus maacki Gersfeldt, 1859 from the Baikal Lake

2016 ◽  
Vol 5 (1) ◽  
pp. 97-107 ◽  
Author(s):  
Stefan Witold Alexandrowicz
Keyword(s):  
Baikal Lake ◽  
Biometrical Study

Typification and the Current State of Baikal Lake Shore

2020 ◽  
Vol 47 (4) ◽  
pp. 651-662
Author(s):  
E. A. Kozyreva ◽  
A. V. Kadetova ◽  
A. A. Rybchenko ◽  
V. A. Pellinen ◽  
A. A. Svetlakov ◽  
...  
Keyword(s):  
Baikal Lake ◽  
Lake Shore ◽  
Current State

scholarly journals NIGHT MIGRATION COMPLEX OF ENDEMIC AMFIPOD AS AN INDICATOR OF ENVIRONMENTAL STATE BAIKAL LAKE

2020 ◽  
Author(s):  
V.V. Takhteev ◽  
◽  
D.A. Batranin ◽  
I.O. Eropova ◽  
E.B. Govorukhina ◽  
...  
Keyword(s):  
Organic Matter ◽  
Lake Baikal ◽  
Aquatic Vegetation ◽  
Pelagic Zone ◽  
Baikal Lake ◽  
Anthropogenic Eutrophication

With the ongoing anthropogenic eutrophication of the Lake Baikal there is an increase in the abundance not only of aquatic vegetation, but also organismsconsumers. As consumers of vegetable detritus are crustaceans – amphipods, which, by eating detritus, partially reduce the pollution of the lake with rotting organic matter. A significant increase in their number is evidenced by the increase in the abundance of amphipods in the nocturnal migratory complex in the coastal pelagic zone.

scholarly journals Andrena Florivaga Eversmann , 1852 (Hymenoptera: Apoidea: Andrenidae) - A New Bee Species of the Genus Andrena in Poland

2013 ◽  
Vol 57 (1) ◽  
pp. 45-50
Author(s):  
Józef Banaszak ◽  
Ewelina Motyka ◽  
Katarzyna Szczepko
Keyword(s):  
National Park ◽  
Morphological Characteristics ◽  
First Record ◽  
General Distribution ◽  
Baikal Lake ◽  
The West ◽  
Central Siberia ◽  
Lake Region ◽  
Time Period ◽  
Pan Traps

Summary The first record of Andrena florivaga Eversmann, 1852 is reported from Poland on the basis of specimens collected in the Kampinos National Park (Mazovian Lowland). Diagnosis, data on localities, biology, and general distribution of the species are provided. One female and five males were caught on a mowed fresh meadow and fallow fields with the use of water pan-traps (Moericke traps), during the 2003 - 2004 time period. The main morphological characteristics distinguishing Andrena florivaga from the very similar Andrena dorsalis Brullé, 1832 species and from the other species of the subgenus Lepidandrena are: in the case of females - the width of facial foveae and colouration of legs, and in the case of males - the length of the first flagellar segment, colouration of clypeus, and pubescence of gonostyles. Andrena florivaga can be found from France in the west, to Central Siberia (Baikal lake region) in the east, and Turkey in the south. Poland is the northernmost locality of the species.

scholarly journals MICROSATELLITE POLYMORPHISM WITHIN TWO LAKE BAIKAL OILFISH SPECIES (COMEPHORUS LACEPEDE, 1801)

2007 ◽  
Vol 5 (2) ◽  
pp. 50-57 ◽  
Author(s):  
Veronika I Teterina ◽  
Lubov V Sukhanova ◽  
Sergey V Kirilchik
Keyword(s):  
Genetic Polymorphism ◽  
Genetic Differentiation ◽  
Lake Baikal ◽  
Microsatellite Loci ◽  
Passive Transfer ◽  
Microsatellite Analysis ◽  
Microsatellite Polymorphism ◽  
Baikal Lake ◽  
Water Currents ◽  
Cottus Gobio

Intraspecific genetic polymorphism of a Baikal Lake endemic, big Baikal oilfish (Comephorus baicalensis Pallas, 1776), was evaluated based on microsatellite analysis. The obtained results have compared to the results received earlier for a little Baikal oilfish (C. dybowski Korotneff, 1905). Six microsatellite loci designed for the European sculpin, Cottus gobio, were used. Big Baikal oilfish samples were tested from the three Baikal trenches (southern, middle, northern). Average values of F<sub>ST</sub> and R<sub>ST</sub>indexes between the samples did not exceed 0,02 that point to weak intraspecific genetic differentiation. Big Baikal oilfish had the smaller allele variety, the greater deficit of heterozygotes and presence of low-molecular alleles in comparison with little Baikal oilfish. The values of genetic differentiation were equaled F<sub>ST</sub> = 0,138 and R<sub>ST</sub> = 0,244 for all loci between cumulative samples of little and big Baikal oilfish. Analysis of microsatellite polymorphism has showed that both a big and little Baikal oilfishes are represented by single populations. The factor promoting panmixia within the Baikal oilfish species is apparently a passive transfer of juvenile and adult fishes by water currents.

scholarly journals Ice jam flood risks on the rivers of the Baikal Basin

2020 ◽  
Vol 163 ◽  
pp. 02001
Author(s):  
Tatyana Borisova
Keyword(s):  
Negative Impact ◽  
Flood Hazard ◽  
Hazard Analysis ◽  
Lake Basin ◽  
Baikal Lake ◽  
Ice Jams ◽  
Damage Area ◽  
Selenga River ◽  
Ice Jam ◽  
Rational Development

The article presents the results of analysis and assessment of risks related to ice jams on the rivers of the Baikal Lake Basin. It also proposes the recommendations for mitigation and rational development of coastal areas. Data on catastrophic ice jam floods for more than 100 years is presented, the factors of their formation and mechanism of their movement are considered. On the basis of official statistics from expedition surveys, potentially dangerous jamming areas have been identified, and the repeatability and extent of floods have been calculated. With the help of ArcGIS package the scale of possible flooding was determined, which allowed to reveal the list of economic objects within the damage area. Specific indicators have been used to calculate the expected damage to territories, facilities and population from the flood hazard. Analysis and assessment of economic risk from the floods on the Selenga River are given. Measures to minimize risks of negative impact of floods are proposed.

A morphological and biometrical study of the blood forms ofTrypanosoma suisOchmann, 1905

Parasitology ◽  
1963 ◽  
Vol 53 (1-2) ◽  
pp. 217-223 ◽  
Author(s):  
L. E. Stephen
Keyword(s):  
Length Distribution ◽  
Systematic Position ◽  
London School ◽  
Normal Length ◽  
Line Drawings ◽  
The Status ◽  
Belgian Congo ◽  
Biometrical Study ◽  
Free Flagellum ◽  
Selection Of

The status ofTrypanosoma suiswas held in doubt from the time it was first seen in 1905 until it was re-discovered and carefully studied in the Belgian Congo in 1954.A description is given of the morphology of single and dividing forms ofT. suisas seen in stained thin films made from the blood of infected pigs, and a selection of these is illustrated by line drawings. Briefly this trypanosome is short and stumpy with a free flagellum.A biometrical study was made on 200 organisms, showing a normal length distribution with a range from 8·5 to 18·5μ, and mean = 14·43μ.The monomorphism of the trypanosome is verified, and—because of its development in the salivary glands ofGlossina—its systematic position as a monomorphic subgroup of theBruceigroup is confirmed.I am much indebted to Dr C. A. Hoare, F.R.S., for the loan of the blood films used in this study and for his interest in the work. I am also grateful to Professor P. C. C. Garnham for providing me with accommodation and equipment at the London School of Hygiene and Tropical Medicine.

Sign in / Sign up

Export Citation Format

Share Document