A Preliminary Study on the Optimum Concentration of Copper Sulfate and Utilization of Valisneria Plant in Controlling Green Algal Growth Under Aquarium Condition

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dc.contributor.authorPriyadarshana, R.W.H.H.
dc.contributor.authorJayamanne, S.C.
dc.date.accessioned2022-02-23T05:47:53Z
dc.date.available2022-02-23T05:47:53Z
dc.date.issued2013
dc.description.abstractOrnamental fish industry plays a considerable role in the economy of Sri Lanka since the globalization ornamental fish industry (Wijesekara and Yakupitiyage, 2001) Maintenance of aquariums with ornamental fish has become a hobby of people and aquarium owners but the controlling excessive algal bloom has become a hindrance. Green algae are the most common form of algae in the home aquarium. Excessive algal growth is a nuisance for aquarists, due to decreasing dissolved oxygen level, absorbing the nutrients. It is also hazardous to fish and plants. Aquatic plants are known to control algae and Copper Sulfate is a chemical used in aquaculture ponds to control algae (Roy, 2009). Present study attempts to develop a method to control excessive green algal blooms in aquariums combining the effects of Copper Sulfate and aquatic plant Valisnaeria. Methodology Complete randomized design was used as an experimental design and it was carried out at the Uva Wellassa University Animal Science laboratory setting. Thirty six tanks of 12”x 6”x 6” size were used for experiment. Five treatments (concentrations) each for Copper Sulphate, Valisneria spiralis plants and controls for both treatments were used in triplicate. At the beginning, algal medium was created by fertilizing water in a stock tank (4’x 1 ½’x 1 ½’) and by keeping for one week. Ten ppm Copper Sulphate stock solution was prepared and Valisneria spiralis plants having more or less similar total biomass (1.43±0.14), shoot length (13.58±1.54) and root length (6.48±1.34) were selected for experiment. After one week, all tanks were filled using prepared algal water (approximately 230 l) and tanks were kept under black fabric net with 60 % of illumination. Two fighter fishes were stocked in each tank. Initial Chlorophyll content in all the tanks was measured using the spectrophotometer at 630 nm. Five tanks were treated with different concentrations of Copper Sulphate (T1=0.1 ppm, T2=0.2 ppm, T3=0.3 ppm, T4=0.4 ppm and T5=0.5 ppm), five tanks were treated by having different total biomass of Valisneria spiralis plants (T1=1.43 g, T2=3.15 g, T3=5.25 g, T4=7.12 g, T5=8.04 g). Control tanks were devoid of Copper sulphate as well as Valisneria spiralis plants. Light measurements were assured that all the tanks received similar light conditions. Results and Discussion Chlorophyll content at the initial stage was measured as 0.12 mg/l. Mean difference in Chlorophyll content was calculated by averaging the difference between initial and final Chlorophyll contents in each replicate. The values obtained for all treatments are shown in table 1. The Mean differences in Chlorophyll content in both treatments are also shown graphically in Figure 1. As depicted by the results there is a negligible difference in control tanks while treatments have shown differences according to the treatment type. It is evident that both the methods can be used successfully in controlling algae in aquariums effectively although the effect of Copper sulphate is better on algae control than that of using Valisneria spiralis.en_US
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/8424/50-AQT-A%20Preliminary%20Study%20on%20the%20Optimum%20Concentration%20of%20Copper%20Sulfate%20and%20.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.subjectAnimal Sciencesen_US
dc.subjectAquaculture and Fisheriesen_US
dc.subjectAquatic Planten_US
dc.subjectOrnamental Fish Industryen_US
dc.subjectFishen_US
dc.titleA Preliminary Study on the Optimum Concentration of Copper Sulfate and Utilization of Valisneria Plant in Controlling Green Algal Growth Under Aquarium Conditionen_US
dc.title.alternativeResearch Symposium 2013en_US
dc.typeOtheren_US
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