scholarly journals Zooplankton composition and abundance from Nideban Reservoir, Udgir Dist. Latur

2021 ◽  
Vol 12 (3) ◽  
pp. 151-154
Author(s):  
Dhaswadikar Usha Sitaram
Keyword(s):  
Energy Transfer ◽  
Aquatic Ecosystem ◽  
Zooplankton Community ◽  
Aquatic System ◽  
Water Bodies ◽  
Trophic Dynamics ◽  
Fish Production ◽  
Free Swimming ◽  
Reservoir Water ◽  
Taxonomic Groups

Zooplanktons are the microscope free swimming organisms of aquatic system. There are represented by a wide array of taxonomic groups of which the members belonging to protozoa, Rotifera, Cladocera and Copepoda are most common and often dominate the entire communities. They have many remarkable features which hamper their predation by higher organisms. The members of Zooplankton community are important for their role in trophic dynamics, energy transfer in the aquatic ecosystem. They provide food for fishes in the water bodies and play a major role in the fish production. The zooplankton community was studied by monthly samples taken from Oct. 2018 to Feb. 2019. The reservoir water is used for agriculture and fishery activities.

Nuclear Magnetic Resonance Simulation Experiment for a Water Drive Gas Reservoir

2019 ◽  
Vol 141 (11) ◽  
Author(s):  
Qianhua Xiao ◽  
Feifei Fang ◽  
Zhiyuan Wang ◽  
Bocai Jiang ◽  
Yingzhong Yuan
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Water Bodies ◽  
Displacement Efficiency ◽  
Gas Reservoirs ◽  
Gas Reservoir ◽  
Reservoir Water ◽  
Pass Through ◽  
Water Seal ◽  
Nuclear Magnetic

The water invasion property and water drive gas displacement efficiency of water drive gas reservoirs are studied under different displacement pressure gradients by using nuclear magnetic resonance (NMR) online detection technology to better guide the scientific exploration of these reservoirs. The breakthrough pressures of the water seal and water lock are also analyzed. The results show that low-permeability gas reservoir water bodies pass through large pores preferentially and then pass through holes and small pores. The remaining gas is mainly distributed in holes and small pores. In contrast, high-permeability gas reservoir water bodies pass through large pores and holes preferentially, and the remaining gas is mainly distributed in large pores and small pores. As the permeability increases, the water drive gas displacement efficiency decreases. As the displacement pressure gradient increases, the displacement efficiency initially increases and then decreases. The breakthrough pressures of the water seal and water lock are highly affected by the permeability. Large permeability results in easy water breakthrough. Variations in the water invasion and water drive gas displacement efficiency are consistent with the variations of the breakthrough pressure and accurately reflect the properties of water drive gas reservoirs.

scholarly journals Development of monitoring of water bodies ecological status by the example of small lakes in the North-western Ladoga region

2020 ◽  
Vol 163 ◽  
pp. 03002
Author(s):  
Vasiliy Dmitriev ◽  
Svetlana Sedova ◽  
Anastasiia Plenkina ◽  
Viktoriia Khomiakova ◽  
Diana Avdeevich ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Aquatic Ecosystem ◽  
Temporal Dynamics ◽  
Ecological Status ◽  
Component Composition ◽  
Water Bodies ◽  
Factors Affecting ◽  
Ladoga Region ◽  
The North ◽  
North Western

By the example of the Suuri Lake (0.37 km2) situated in the North-Western Ladoga region, modern aspects of monitoring the ecological state of water bodies are generalized, including 1) assessment of the rates of mass transfer processes in water ecosystems and the factors affecting them; 2) assessment of the integrated properties of water bodies and their ecosystems based on hierarchical schemes summarizing information about the state of subsystems and their properties in the form of composite indices. The results of the study in 2019 are visualized. Quantitative estimates of the chemical and biological composition and physical properties of the aquatic ecosystem, mass transfer rates, factors influencing them are obtained; the values of the integral indicators for the subsystem and their properties (productivity, water quality, stability) and the integral indicators of the systems and their integrative properties as a whole (ecological status, ecological wellbeing) are estimated. The temporal dynamics of the processes, component composition and complex properties of the aquatic ecosystem are investigated.

Effects of Common Carp on Trophic Dynamics of Sport Fishes in Shallow South Dakota Water Bodies

2017 ◽  
Vol 146 (2) ◽  
pp. 331-340 ◽  
Author(s):  
Alexander P. Letvin ◽  
Michael L. Brown ◽  
Katie N. Bertrand ◽  
Michael J. Weber
Keyword(s):  
South Dakota ◽  
Common Carp ◽  
Water Bodies ◽  
Trophic Dynamics

Hypolimnetic Aeration and Zooplankton Distribution: A Possible Limitation to the Restoration of Cold-Water Fish Production

1984 ◽  
Vol 41 (1) ◽  
pp. 191-198 ◽  
Author(s):  
Christopher T. Taggart
Keyword(s):  
Cold Water ◽  
Pimephales Promelas ◽  
Food Resource ◽  
Zooplankton Community ◽  
Fish Production ◽  
Fathead Minnows ◽  
Isolated Populations ◽  
Zooplankton Distribution ◽  
Water Fish

Hypolimnetic aeration of a 1.23-ha eutrophic kettle lake during two consecutive summers increased [O2] to more than 4 mg/L in the hypolimnion for extended periods. This improvement did not lead to the expected development of crustacean populations in the previously anoxic, zooplankton-deficient hypolimnion. The rotifer Filinia longiseta was the only zooplankter present, as isolated populations, in both the epilimnion and hypolimnion during summer. Eighty percent of the summer zooplankton community occurred exclusively in the epilimnion, and this was related to the development of an anoxic and toxic metalimnion that restricted migration from the epilimnion to the hypolimnion. Confinement of the zooplankton to the epilimnion coupled with predation by fathead minnows (Pimephales promelas) appeared to be responsible for the change in the zooplankton community from large cladocerans and copepods to smaller species. This study suggests that hypolimnetic aeration as a means of restoring or enhancing the production of cold-water fish may be thwarted by the development of a stable anoxic and toxic metalimnion that precludes the development of the zooplankton food resource.

scholarly journals Spatial Distribution of Phytoplankton and Physico-Chemical Characteristics of Reservoir Agaie-Lapai Dam, Minna, Niger State, Nigeria

2016 ◽  
Vol 7 (2) ◽  
pp. 1
Author(s):  
Ojutiku R. O. ◽  
Kolo R. J. ◽  
Yakubu M. A.
Keyword(s):  
Chemical Characteristics ◽  
Chemical Parameters ◽  
Dam Reservoir ◽  
Reservoir Water ◽  
Aquatic Life ◽  
Physico Chemical ◽  
Irrigation Purpose ◽  
Productive Water ◽  
Taxonomic Groups ◽  
Fish Productivity

<p class="jbls">Presence of phytoplankton displays water quality and useablity by aquatic life. Agaie-Lapai Dam located in Niger State (latitude 9⁰ 39N and longitude 6⁰33E) was constructed for irrigation purpose and also to serves as source of livelihood to fishermen living in surroundings. The objective of the present research was conducted to assess the distribution of phytoplankton and physic-chemical assessment of Agaie-Lapai Dam. Reservoir Water.  Samples were collected fortnightly and analyzed for phytoplankton and physico-chemical parameters. The dissolved oxygen ranged from 3.8 – 5.15mg/l and temperature from 24.6 – 29.0<sup>0</sup>C.  A total of 14 species of 5 taxonomic groups were recorded. Bacillariophyceae was the most abundant group (44%) followed by Chlorophyceae (26%) while the lowest was Dinophyceae (8%). Phytoplankton abundances in the following descending order: Bacillariophyceae&gt;Cyanophyceae&gt;Chlorophyceae&gt;Chrysophyceae&gt;Dinophyceae.The spatial analysis revealed that phytoplankton was not equally distributed in the water that enabled it to function as productive water body. The observed physico-chemical parameters fell within thus it was within the tolerable limits. It is expected that the identified species will enhance fish productivity. </p>

scholarly journals Physicochemical assesment of Khelna reservoir water from Aurangabad District of Maharashtra

2021 ◽  
Vol 4 (3) ◽  
pp. 174-177
Author(s):  
M J Jadhav ◽  
J H Sawdekar
Keyword(s):  
Water Resources ◽  
Physicochemical Parameters ◽  
Water Bodies ◽  
Normal Range ◽  
Reservoir Water ◽  
Regular Monitoring ◽  
Drinking And Irrigation ◽  
Quality Of Water ◽  
Irrigation Purpose

Present study deals with the physicochemical assesment of Khelna reservoir water. Life in water depends upon the physicochemical conditions prevailing in that water. A total of 20 parameters were analyzed at seasonal intervals. Results of present study reveals that all selected physicochemical parameters were found in normal range as per the guidelines of WHO. The water is potable and safe for drinking and irrigation purpose. In order to maintain better quality of water, regular monitoring of quality of water and protection and conservation of water bodies is required. A proper awareness among society has to be created about protection and conservation of water resources.

scholarly journals Current Status of Water Bodies of Karelia as a Result of Natural, Climatic and Anthropogenic Factors’ Impact

2017 ◽  
Author(s):  
Keyword(s):  
Chemical Composition ◽  
Atmospheric Precipitation ◽  
Point Sources ◽  
Water Bodies ◽  
Anthropogenic Sources ◽  
Current Status ◽  
Anthropogenic Factors ◽  
Biogenic Elements ◽  
Lake Ladoga ◽  
Reservoir Water

It has been shown that the status of some Karelian water bodies had changed as a result of human impact and atmospheric precipitation has a role in the surface waters’ chemical composition formation. Assessment of biogenic elements and organic matter input to the Lake Onego and the Lake Ladoga from various natural and anthropogenic sources has been done. Higher load from point sources in comparison with diffuse sources has been registered for the Lake Onego in comparison with the Lake Ladoga. Many-year change of the Vygozero reservoir water chemical composition has been presented. This reservoir receives the Segezh paper-pulp plant waste waters and the Kenti River system waters with technogenic waters from the Kostomuksha mining/concentrating plant. It has been stated that atmospheric precipitations serve the main source of the biogenic elements and heavy metals input, while input of mineral and organic substances with the precipitation is insignificant. For the first time assessment of the Karelian water bodies’ state caused by the natural, climatic, and anthropogenic factors’ impact has been done.

scholarly journals Identifying zooplankton community changes between shallow and upper-mesophotic reefs on the Mesoamerican Barrier Reef, Caribbean

2016 ◽  
Author(s):  
Dominic A Andradi-Brown ◽  
Catherine Head ◽  
Dan A Exton ◽  
Christina L Hunt ◽  
Alicia Hendrix ◽  
...  
Keyword(s):  
Zooplankton Community ◽  
Barrier Reef ◽  
Depth Gradient ◽  
Light Traps ◽  
Mesophotic Coral Ecosystems ◽  
Community Shifts ◽  
Mesoamerican Barrier Reef ◽  
Community Changes ◽  
Taxonomic Groups ◽  
Zooplankton Communities

Mesophotic coral ecosystems (MCEs, reefs 30 -150m) are understudied, yet the limited research conducted has been biased towards large sessile taxa, such as scleractinian corals and sponges, or mobile taxa such as fish. Here we investigate zooplankton communities on shallow reefs and MCEs around Utila, on the southern Mesoamerican Barrier Reef using planktonic light traps. Zooplankton samples were sorted into broad taxonomic groups. Our results indicate similar taxonomic zooplankton richness and overall biomass between shallow reefs and MCEs, but that abundance of larger bodied (>2 mm) zooplanktonic groups, including decapod crab zoea, mysid shrimps and peracarid crustaceans was higher on MCEs than shallow reefs. Our findings highlight the important of considering zooplankton when identifying broader reef community shifts across the shallow reef to MCE depth gradient.

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