scholarly journals Monthly and diurnal variations of limnological conditions of two ponds

2017 ◽  
Vol 7 (1) ◽  
pp. 14-20
Author(s):  
AKM Fazlur Rahaman ◽  
MA Mansur ◽  
M Shahidur Rahman
Keyword(s):  
Carbon Dioxide ◽  
Dissolved Oxygen ◽  
Research Work ◽  
Diurnal Variations ◽  
Free Carbon ◽  
Total Alkalinity ◽  
Diurnal Changes ◽  
University Campus ◽  
Physico Chemical ◽  
Free Carbon Dioxide

A study on monthly and diurnal changes of limnological conditions of two ponds was conducted in the Bangladesh Agricultural University campus, Mymensingh. The research work was performed by studying the limnological parameters such as transparency, temperature, dissolved oxygen, free carbon dioxide, pH, total alkalinity, nitrate-nitrogen, phosphate-phosphorus and plankton. Diurnal variations of physico-chemical factors were studied fortnightly at 6 hrs intervals at 6 a.m., 12 noon, 6 p.m. and 12 midnight. The amounts of transparency, dissolved oxygen and pH were higher during winter months than in summer months in both the ponds. Transparency, water temperature, total alkalinity, NO3-N and PO4-P were higher during summer months than in winter months in both the ponds. But the amount of free carbon dioxide was higher during winter months than in summer months in pond 1 while in pond 2 the amount of free carbon dioxide was higher during summer months than in winter months. Qualitative and quantitative monthly variations of phytoplankton and zooplankton were observed in both the ponds during the study period. The highest amount of dissolved oxygen, pH and total alkalinity were recorded at 6 p.m. and the lowest amounts of those at 6 a.m. in both the ponds. The highest temperature was recorded at 12 noon and the lowest at 12 midnight. But the highest amount of free carbon dioxide was recorded at 6 a.m. and the lowest at 6 p.m. in both the ponds. All the factors showed appreciable diel variations throughout the study period, which indicate that the ponds are productive.Int. J. Agril. Res. Innov. & Tech. 7 (1): 14-20, June, 2017

scholarly journals Acute Toxicity of Tuber Peels of Tacca leontopetaliodes on the Biochemistry and Histology of Gills and Liver of Clarias gariepinus Juveniles

2020 ◽  
Vol 4 (3) ◽  
Author(s):  
Bala S. Audu ◽  
Jamiu O. Omirinde ◽  
Audu I. Wakawa ◽  
Ibrahim A. Dalhatu ◽  
Jacinta B. Sale
Keyword(s):  
Carbon Dioxide ◽  
Acute Toxicity ◽  
Dissolved Oxygen ◽  
Histopathological Examination ◽  
Clarias Gariepinus ◽  
Aquatic Organisms ◽  
Free Carbon ◽  
Range Finding ◽  
Free Carbon Dioxide ◽  
Peel Extract

Background: Increased rate of water pollution has detrimental effects on the health of fish and other aquatic organisms. This invariably affects humans by causing food insecurity, hunger and poverty. In an effort to curb this menace, this study investigated the effects of crude tuber peel extract of Tacca leontopetaliodes on the biochemical and histological parameters of Clarias gariepinus. Methods: Acute toxicity (96 hr . LC50) test was conducted after a range finding test from which definitive test concentrations of 5.00, 4.00, 3.00, 2.00, and 1.00 g/L were obtained with 0.00 g/L as control. One hundred and twenty (120) mixed sex C. gariepinus fingerlings (mean weight, 12.5 g ± 0.5; length, 13.2 cm ± 0.5) were administered definitive concentrations of crude tuber peel extract in duplicate replication. Water quality parameters (pH, dissolved oxygen, free carbon dioxide, alkalinity), tissue enzymes (Alkaline phosphatase (ALP), Alanine Aminotransferase (ALT), Aspartate Aminotransferase (AST) and histopathological assessments were analysed using standard procedures. Results: Physico-chemical parameters (pH, dissolved oxygen, free carbon dioxide and alkalinity) of test tanks containing graded concentrations of T. leontopetaliodes were significantly altered (p<0.05) compared to the control tank. Similarly, the profile of hepatic enzymes (ALP, AST and ALT) displayed marked progressive dose-dependent increase levels relative to the control. Histopathological examination revealed graded deterioration of gills and liver architecture with increase in the strength of the extract T. leontopetaliodes Conclusion: The crude tuber peel extract of T. leontopetaliodes is toxic to fish, thus, washing, processing and discard of T. leontopetaliodes in and around riparian systems should be discouraged.

scholarly journals Influence of physico-chemical factors on the zooplankton population of Bostami pond of Chittagong

2016 ◽  
Vol 44 (1) ◽  
pp. 73-87
Author(s):  
Sajeda Akter ◽  
Abdul Maleque Bhouyain ◽  
Subarna Azad ◽  
Dilshad Nasrin
Keyword(s):  
Carbon Dioxide ◽  
Water Depth ◽  
Common Species ◽  
Total Dissolved Solids ◽  
Free Carbon ◽  
Dissolved Solids ◽  
Keratella Cochlearis ◽  
Physico Chemical ◽  
Free Carbon Dioxide ◽  
Chemical Factors

The study was conducted on the influence of physico-chemical factors on the zooplankton of Bostami pond in Chittagong city for a period of one year from February 2013 to January 2014. During this study the water depth varied from 1.54 to 2.53 m, water temperature 24.5 to 32.6°C, conductivity 0.234 to 0.297 mS, turbidity 26.55 to 33.41 ntu, light intensity 27 to 39.5 lux, total dissolved solids 161 to 191 ppm, pH 7.02 to 7.79, dissolved oxygen 3.4 to 5.73 ppm, free carbon dioxide 2.82 to 5.85 ppm, and calcium 25.08 to 43.03 ppm. It was found that the temperature was less during February 2013 and gradually increased up to June 2013. Then with a break in July it gradually decreased until the next January 2014. More or less reverse data observed for the monthly variation of conductivity, total dissolved solids and calcium. Free carbon dioxide is inversely related with water depth and pH. In total 19 species of zooplankton were identified, where 16 rotifera were the dominant followed by two copepods and one cladoceran. Among these, Brachionus diversicornis, B. angularis, B. quadridentatus, B. falcatus, B. calyciflorus, B. forficula, B. caudatus, Platyias patulus, Keratella cochlearis, Lecane luna, Trichocerca cylindrica, Polyarthra vulgaris, Asplanchna priodonta, A. brightwelli, Filinia longiseta, F. terminalis, Mesocyclops leuckarti, Cyclops varicans rubellus and Moina brachiata were the most common species in the pond throughout the year. Abundance of phytoplankton and zooplankton indicated that the nutrient quality of the pond water was good. The total phytoplankton varied from 842 to 2223 individuals/l and total zooplankton 187 to 494 individuals/l; with rotifera 105 to 266 individuals/l, copepoda 43 to 135 individuals/l and cladocera from 39 to 115 individuals/l throughout the year. Plankton abundance and physico-chemical characteristics of the Bostami pond indicate that the pond is eutrophic in nature.Bangladesh J. Zool. 44(1): 73-87, 2016

Influence of Dissolved Oxygen and Carbon Dioxide on Swimming Performance of Largemouth Bass and Coho Salmon

1968 ◽  
Vol 25 (1) ◽  
pp. 49-70 ◽  
Author(s):  
Michael L. Dahlberg ◽  
Dean L. Shumway ◽  
Peter Doudoroff
Keyword(s):  
Carbon Dioxide ◽  
Dissolved Oxygen ◽  
Oxygen Concentration ◽  
Swimming Speed ◽  
Largemouth Bass ◽  
Coho Salmon ◽  
Free Carbon ◽  
Carbon Dioxide Concentrations ◽  
Free Carbon Dioxide ◽  
Oxygen Concentrations

The final swimming speed of juvenile largemouth bass, Micropterus salmoides (Lacépède), was reduced markedly at oxygen concentrations below 5 or 6 mg/liter in tests at 25 C in a tubular chamber in which the velocity of water was increased gradually, at 10-min intervals, until the fish were forced by the current permanently against a screen. At levels above 6 mg/liter, the final swimming speed was virtually independent of the oxygen concentration. The performance of bass that had been acclimated overnight to elevated carbon dioxide levels was not materially affected by the highest tested concentrations of free carbon dioxide, averaging 48 mg/liter, at any tested level of dissolved oxygen.For juvenile coho salmon, Oncorhynchus kisutch (Walbaum), at temperatures near 20 C and carbon dioxide concentrations near 2 mg/liter, any considerable reduction of the oxygen concentration from about 9 mg/liter, the air-saturation level, resulted in some reduction of the final swimming speed. The performance of the salmon was impaired much more markedly than was that of the bass by the same reduction of the oxygen concentration. At oxygen concentrations near and above the air-saturation level, high concentrations of free carbon dioxide averaging 18 and 61 mg/liter had a depressing effect on the final swimming speed of coho salmon even after overnight acclimation. However, this effect decreased at reduced oxygen concentrations. No measurable effect of free carbon dioxide concentrations near 61 mg/liter was evident at 2 mg/liter dissolved oxygen, and concentrations near 18 mg/liter had little or no effect even at moderately reduced dissolved oxygen levels after overnight acclimation of the salmon to these carbon dioxide concentrations.

scholarly journals The Effect of Free Carbon Dioxide on Copper-corrosion Behavior

2003 ◽  
Vol 52 (5) ◽  
pp. 259-266
Author(s):  
Kazuharu Sobue ◽  
Shin'ichi Magaino ◽  
Akifumi Sugahara ◽  
Hachiro Imai
Keyword(s):  
Carbon Dioxide ◽  
Corrosion Behavior ◽  
Free Carbon ◽  
Copper Corrosion ◽  
Free Carbon Dioxide

scholarly journals Diel dynamics of heleoplankton in relation to some physico-chemical attributes of water in an aquaculture tank in Guwahati, Assam

2012 ◽  
Vol 4 (1) ◽  
pp. 16-22
Author(s):  
Janardan Pathak ◽  
M. M. Goswami
Keyword(s):  
Water Temperature ◽  
T Test ◽  
Total Alkalinity ◽  
Diurnal Fluctuation ◽  
Total Hardness ◽  
Numerical Density ◽  
Physico Chemical ◽  
Free Carbon Dioxide ◽  
Chemical Attributes ◽  
Positive Correlations

Diurnal fluctuation of the phytoplankton and zooplankton population (numerical densities) and the physicochemical attributes of water are studied in an aquaculture pond at Guwahati, Assam. In the 24 hour diel cycle, the phytoplankton and zooplankton show significant (t-test, p < 0.01) variation in their numerical density at an interval of 4 hours. The studied physico-chemical parameters of water included Temperature, Total Alkalinity (TA), Total hardness (TH), Dissolved Oxygen (DO), Free Carbon dioxide (FCO2) and pH are analyzed concurrently, which reveals a significant fluctuation (t-test, p< .01) in the day and night hours. Multivariate correlation analysis portrays significant and positive correlations among the total population density of phytoplankton with respect to water temperature (r = 0.845, p<0.05) and pH (r = 0.881, p< 0.01) while it maintains significant negative correlations with TA (r = -0.837, p<0.05), TH (r = -0.768, p< 0.05) and FCO2 (r = -0.830, p<0.05). However, total numerical density of zooplankton reveals positive and significant correlations with TA (r = 0.842, p< 0.05) and FCO2 (r= 0.758, p< 0.05) while it shows significant negative correlations with water temperature (r = -0.906, p< 0.01) and pH (r =- 0.912, p< 0.01).

scholarly journals Behaviour of fourteen exotic ornamental fishes of Bangladesh under starved condition in aquaria

2013 ◽  
Vol 1 (1) ◽  
pp. 48
Author(s):  
ABM Mohsin ◽  
Roni Chandra Mondal
Keyword(s):  
Dissolved Oxygen ◽  
Water Temperature ◽  
Research Work ◽  
Ammonia Nitrogen ◽  
Total Alkalinity ◽  
Basic Knowledge ◽  
Survival Period ◽  
Research Findings ◽  
Constant Observation ◽  
Almost All

The behaviour of fourteen exotic ornamental fishes of Bangladesh under starved condition in aquaria was experimented from January to December, 2011. Fishes were belonging to 13 genera, 09 families and 4 orders. Two treatments each with three replications were used. Four different behavioural phases of fish were monitored through constant observation. Almost all the behavioural phases were seen earlier in the fishes of treatment T1. Marble angel survived more (1022±4.02 hrs; T2) than others. The lowest survival period (116±2.44 hrs; T1) was seen for albino suckermouth. Fishes were died earlier in T1 than T2, due to presence or absence of aeration facilities. Water temperature, dissolved oxygen, free CO2, pH, total alkalinity, ammonia-nitrogen and chlorine level were found to be varied from 25.66±0.17 to 28.66±0.35°C, 3.80±0.06 to 4.73±0.07 mg/l, 9.21±0.05 to 11.75±0.03 mg/l, 7.13±0.05 to 7.47±0.07, 76.66±1.64 to 108.92±3.20 mg/l, 0.0010±0.0006 to 0.0133±0.002 mg/l and 0.0045±0.001 to 0.012±0.0014 mg/l, respectively. The research findings would be helpful in gathering basic knowledge on different behavioural phases through which aquarists can maintain primitive behavioural phase in their aquaria.  Further research work is suggested in the aforesaid theme massively.

scholarly journals Potensi budidaya ikan di Waduk Embung Klamalu Kabupaten Sorong Provinsi Papua Barat: Kajian kualitas fisika kimia air

2013 ◽  
Vol 1 (3) ◽  
Author(s):  
Agustina Frasawi ◽  
Robert J Rompas ◽  
Juliaan Ch. Watung
Keyword(s):  
Carbon Dioxide ◽  
Water Quality ◽  
Dissolved Oxygen ◽  
Good Condition ◽  
Fish Farming ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Total Alkalinity ◽  
Physical Chemical ◽  
Papua Barat

The objective of this research was to measure and analyze the water quality parameters including temperature, brightness, pH, dissolved oxygen, total alkalinity, carbon dioxide and BOD in reservoir Embung Klamalu Sorong regency, and to know the factors that affected the water quality of Embung Klamalu. Measurement of water quality parameters was done in situ for temperature, brightness, pH and in laboratory for dissolved oxygen, total alkalinity, carbon dioxide, and BOD. The results showed the temperature at the five observation stations ranged from 26.2 to 29.8 0C, brightness 38 to 46 cm, pH 7.20 to 8.48 mg /L, dissolved oxygen from 7.20 to 8.48 mg / L, alkalinity 100 to 150 mg /L, carbon dioxide from 25.90 to 28.95 mg / L, BOD from 0.20 to 0.38. Refers to the standards of water quality according to the PP. 82, 2001, it could be concluded that water physical-chemical qualities in fish farming locations in the Village Klamalu were still in good condition. Keywords: Water physical-chemical quality, aquaculture, waduk Embung Klamalu

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