Changes in the numbers of dominating parasites as indicators of the condition of roach,Rutilus rutilus lacustris, and daceLeuciscus leuciscus baicalensis(Pisces: Cyprinidae) populations in the transect Selenga River – River Delta – Lake Baikal

2010 ◽  
Vol 13 (1) ◽  
pp. 35-40
Author(s):  
N. M. Pronin ◽  
M. D. Batueva ◽  
L. D. Sondueva ◽  
T. G. Burdukovskaya ◽  
Zh. N. Dugarov ◽  
...  
Keyword(s):  
Lake Baikal ◽  
Rutilus Rutilus ◽  
River Delta ◽  
Roach Rutilus Rutilus ◽  
Selenga River

Studying Fluvial Tipping Points with Remotely Sensed Observations and Hydroclimatic Data in the Selenga River Delta

2020 ◽  
Author(s):  
Saeid Aminjafari ◽  
Ian Brown ◽  
Jerker Jarsjö ◽  
Sergey R. Chalov ◽  
Fernando Jaramillo
Keyword(s):  
Lake Baikal ◽  
River Discharge ◽  
Climatic Conditions ◽  
Flow Path ◽  
River Delta ◽  
Tipping Points ◽  
Runoff Water ◽  
Selenga River ◽  
Selenga River Delta ◽  
Hydrological Changes

<p>Lake Baikal, located in eastern Russia, is the oldest (25 million years) and the deepest (~1800 meters) lake in the world. There are many rivers flowing into the Lake Baikal (~ 365 rivers), of which the Selenga River is the most important one being responsible for almost 55% of the runoff water into the system and also 60% of the transported sediments. As the hydrological changes of the river and its delta enormously alter the neighbouring area, it is of utmost importance to explore the dynamics of change in terms of flow magnitude, paths and fluvial geomorphology, and the related tipping points defining different states. The questions this study aims to answer are: What are the fluvial geomorphological and hydrological changes? What fluvial geomorphological tipping points can be identified during the last 34 years and what are the discharge and climatic conditions that induce them? In this study, we use the Global Surface Water Dataset (GSWD) to analyze the changes in the river’s stream network. With these products, we assess changes in several fluvial geomorphological proxies (e.g., sinuosity, fractal dimension, meandering characteristics, planform information) and identify possible tipping points. We relate these changes to different hydrological and climatic conditions such as precipitation, river discharge and Lake Baikal water level. We find evident changes in the meandering behaviour and flow path of the Selenga River tributaries in the Delta. The number of oxbow lakes based and corresponding size distribution has varied in time, and evident flow path changes occur that seem to be related to flooding periods, and there appears to be a consistent relationship between meandering and the river discharge variability. These results enable policymakers to understand different contributing factors altering the Selenga River Delta and ultimately leading to better decisions to manage the effects of these changes in the area.</p>

Sedimentation in Proval Bay (Lake Baikal) after earthquake-induced subsidence of part of the Selenga River delta

2010 ◽  
Vol 51 (12) ◽  
pp. 1275-1284 ◽  
Author(s):  
E.G. Vologina ◽  
I.A. Kalugin ◽  
Yu.N. Osukhovskaya ◽  
M. Sturm ◽  
N.V. Ignatova ◽  
...  
Keyword(s):  
Lake Baikal ◽  
River Delta ◽  
Selenga River ◽  
Selenga River Delta

scholarly journals The Selenga River delta: a geochemical barrier protecting Lake Baikal waters

2016 ◽  
Vol 17 (7) ◽  
pp. 2039-2053 ◽  
Author(s):  
Sergey Chalov ◽  
Josefin Thorslund ◽  
Nikolay Kasimov ◽  
Denis Aybullatov ◽  
Elena Ilyicheva ◽  
...  
Keyword(s):  
Lake Baikal ◽  
River Delta ◽  
Geochemical Barrier ◽  
Selenga River ◽  
Selenga River Delta

Modern State of the Biota of the Selenga River Delta (Lake Baikal Basin) under Conditions of Unstable Hydrological Regime. Report II. Macrozoobenthos

2016 ◽  
Vol 52 (3) ◽  
pp. 53-64
Author(s):  
N. A. Rozhkova ◽  
V. N. Sinyukovich ◽  
O. A. Timoshkin ◽  
N. A. Bondarenko ◽  
A. V. Nepokrytykh ◽  
...  
Keyword(s):  
Lake Baikal ◽  
Hydrological Regime ◽  
River Delta ◽  
Modern State ◽  
Baikal Basin ◽  
Selenga River ◽  
Selenga River Delta ◽  
Lake Baikal Basin

Morphological, histological, and molecular aspects of Myxobolus zaikae n. sp., a parasite of the roach Rutilus rutilus, in Lake Baikal

2020 ◽  
Vol 142 ◽  
pp. 75-82
Author(s):  
MD Batueva
Keyword(s):  
Connective Tissue ◽  
Lake Baikal ◽  
Rutilus Rutilus ◽  
Lateral View ◽  
Cyprinid Fish ◽  
Spore Morphology ◽  
Frontal View ◽  
Roach Rutilus Rutilus ◽  
The Common ◽  
Molecular Aspects

A new myxobolid species, Myxobolus zaikae n. sp., was found in the connective tissue near the kidney and liver blood vessels of the common roach Rutilus rutilus, while fish myxosporean fauna were being investigated in Lake Baikal, Russia. The parasites were studied on the basis of spore morphology as well as with histological and molecular methods. Mature spores of M. zaikae n. sp. are round or ellipsoidal in the frontal view and lemon-shaped in the lateral view, measuring 11.37 ± 0.11 µm (10.2-14.0 µm) in length, 10.29 ± 0.10 µm (9.6-11.0 µm) in width, and 6.3 ± 0.08 µm (5.8-7.1 µm) in thickness (mean ± SD; n = 50). Polar capsules are equal and pyriform, measuring 4.5 ± 0.07 µm (3.4-5.2 µm) in length and 2.9 ± 0.03 µm (2.6-3.3 µm) in width. Polar capsules contained polar filaments coiled with 5 to 6 turns. Phylogenetic analysis showed that this newly described species clusters with other myxobolid species infecting the connective tissue of different organs from Palearctic cyprinid fish.

The linear growth of roach infected with Ligula Intestinalis plerocercoids in the Chivyrkuysky Bay of the lake Baikal

2016 ◽  
Vol 3 (3) ◽  
pp. 312-318
Author(s):  
Дугаров ◽  
Zh. Dugarov ◽  
Ринчинов ◽  
Z. Rinchinov
Keyword(s):  
Body Length ◽  
Lake Baikal ◽  
Linear Growth ◽  
Age Groups ◽  
Rutilus Rutilus ◽  
Time Interval ◽  
Age Classes ◽  
Infection Level ◽  
Roach Rutilus Rutilus ◽  
Ligula Intestinalis

Objective of research: The purpose of the study is to investigate the influence of Ligula intestinalis plerocercoids on linear growth of roach Rutilus rutilus in the Chivyrkuysky bay of the lake Baikal. Materials and methods. Roach was caught on a permanent station in the Monakhovo creek of Chivyrkuysky bay of the lake Baikal at the same time interval (June 25-July 5) in 1997-2005. The analysis of roach infection with L. intestinalis plerocercoids was performed based on incomplete parasitological dissections of 807 host specimens at the age of 0+ to 10+. Standard body length (the distance from the tip of the snout to the anterior end of the caudal fin) was used to characterize the linear growth of roach. Results and discussion. L. intestinalis plerocercoids wasn’t found out in underyearlings (0+) of roach. The host began to be infected with this tapeworm at the age of 1+. The maximum infection level with L. intestinalis plerocercoids was observed in roach at the age of 3+. That one was significantly reduced in the age of 4+. The infection level of roach with L. intestinalis continued to decrease in the next age groups, going down to a minimum at the age of 7+. The roach wasn’t infected with this tapeworm at the age of 8+–10+. A significant reduction of the infection level in the roach in the age classes 4+ and older after the maximum at the age of 3+ was probably associated with parasite-induced mortality of the host during the growth of the age group 3+ to 4+. A standard body length of roach specimens infected with L. intestinalis at the age of 1+ and 2+ was greater than that of uninfected ones. In contrast, the standard body length of the roach specimens infected with this tapeworm was less than that of uninfected ones in subsequent age classes (3 + -6 +). Differences of standard body length between roach specimens infected with L. intestinalis and uninfected ones were statistically significant in the above-mentioned age groups (1 + 6 +). The effect of L. intestinalis plerocercoids on the linear growth of the roach in Chivyrkuysky Bay of the lake Baikal was manifested in an increase of body length of infected host specimens compared to uninfected ones in young age groups (1+ and 2+) and, vice versa, in one’s decrease in age groups 3+–6 +. We proposed to call this effect “reversive”.

scholarly journals Exomorpholithogenesis of the Selenga River delta at the present stage of the hydroclimatic cycle

2021 ◽  
Vol 885 (1) ◽  
pp. 012039
Author(s):  
E A Ilicheva
Keyword(s):  
Lake Baikal ◽  
River Mouth ◽  
Interdisciplinary Studies ◽  
River Delta ◽  
Water Level Fluctuations ◽  
Sediment Runoff ◽  
Water Runoff ◽  
Selenga River ◽  
Selenga River Delta ◽  
Semi Empirical

Abstract The materials of complex interdisciplinary studies of the relief forming in different periods of water availability in the Selenga River delta are presented since the technogenic level rise of Lake Baikal. Four water and sediment runoff anomalies, synchronous with water level fluctuations in the Lake are identified. The current boundaries of the Selenga River mouth area (RMA), floodplain complex, flooding territories in the maximum water ability conditions are identified. The RMA covers the territory from the main channel bifurcation nod to Lake Baikal, includes subaerial and subaqueous parts of the protruding delta, the interaction zone fluvial processes and different-aged terraces deposits and adjacent lagoons Proval and Cherkalov Sor. Semi-empirical models and data on the water runoff and sediment yield are presented.

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