نتایج جستجو برای: algae control
تعداد نتایج: 1346448 فیلتر نتایج به سال:
To improve the water quality of lakes and control algae blooms, the effects of Vallisneria asiatica which is one of aquatic plants spread over Lake Taihu, with different biomasses on the water quality and algae communities were researched. The results indicated that V. asiatica could control an excess of Microcystis spp. when the V. asiatica biomass was larger than 50g in the tank with 30L solu...
In this study, the effects of different concentrations of Sargassum angustifolium (Agardh, 182 ( extract on the hematological parameters in Common carp were investigated within 14 days. A total of 240 common carp were divided randomly to four treatments (control group without algae extract, 1% algae extract, 10% algae extract and 50% algae extract). Blood samples were taken on days 1, 3, 7 and ...
Nutrients especially nitrate and phosphate are the main limiting factors of algal growth in aquatic ecosystems. The present study was conducted to examine the effects of different concentrations of nitrate and phosphate simultaneously on growth of macro algae, Ulva rigida. For this purpose, algae were fed various concentrations of nitrate and phosphate during 28 days in 300 L tanks in the form ...
currently, white fish or kutum rutilus frisii is considered to be a good candidate for commercial aquaculture. however, little information is available regarding the nutritional requirement of this fish fry. experiments were conducted to examine the effects daphnia magna as live food cultured on two freshwater green algae, chlorella sp. and scenedesmus obliquus enriched with different b group v...
The effect of macro green algae (Chaetomorpha gracilis) inf Bandar-Abbas and filamentous green algae (Spirogyra sp.) in the Sirch river (Kerman Province) were assayed on growth characteristics of the tomato (Lycopersicum sculentum). In the seed priming experiment, we collected hot water extracts of green algae (Chaetomorpha gracilis) from Bandar Abbas seashores and filamentous green algae (Spir...
Background and Objectives: Recently, the use of synthetic antioxidants has been limited due to having chemical and toxic compounds, so the use of natural compounds such as algae, as an alternative to synthetic compounds, is important for the storage of fishery products. The aim of this study was to investigate the effect of Padina australis alga extract on controlling the oxidative spoilage of ...
At present, there are few studies on known bacterial species and even less fungi in biological algae control technology. In this paper, the green eutrophic shallow water lake Scenedesmus quadricauda (Turpin) was used as research object, white rot fungi, which has a high removal effect pollutants, toxins, for control. The extent of effect, physiological characteristics internal functional groups...
spirulina platensis, a cyanobacterium of economic important was studied for the tolerance to cadmium. the bioassay studies showed the ec50 value to be 1.53 mg/g. the cyanobacterium was very sensitive to low metal concentration and the productivity was also reduced. the chlorophyll pigments reduced with decreasing the algal biomass. the algal survival rate showed a marked reduction in their surv...
This paper investigates a dynamic mathematical model of fish algae consumption with an impulsive control strategy analytically. It is proved that the system has a globally asymptotically stable algae-eradication periodic solution and is permanent by using the theory of impulsive equations and small-amplitude perturbation techniques. Numerical results for impulsive perturbations demonstrate the ...
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