The Role of Microalgae in the Cultivation of Zooplankton (Daphnia)

Haydarov, S. M.; Mirzayeva, D. A.; Khujamshukurov, N. A.; Shakirov, Z. S.; Kuchkarova, D. Kh.; Абдиназаров, Х Х

doi:10.20546/ijcmas.2020.905.399

Cited by 2 publications

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“…Chlorococcum sp. is used in various industries, such as food, aquaculture, pharmaceutical, wastewater treatment, and biofuel production [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Short-Term Toxicity of ZnO Nanoparticles on Microalgae at Different Initial Nutrient Concentrations

2023

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The aim of this work was to investigate the combined short-term toxic effect of zinc oxide (ZnO) nanoparticles (NPs) and nitrate concentration of the medium on freshwater microalgae. For this purpose, freshwater microalgae Chlorococcum sp. was cultivated in modified Blue-Green medium (BG-11) containing nitrate concentrations ranging from 0 to 300 mg/L, and exposed to ZnO NPs in different concentrations (0.081 to 810 mg/L) for a period up to 96 h. The experimental results revealed that algal growth was affected by the exposure time, NPs concentrations, and mainly the initial nitrate concentration. Differences in microalgae growth rates were observed. The toxic effect of ZnO NPs was higher on microalgae cultured in modified BG-11 with low and high nitrate concentrations. During the 4-day exposure, the highest growth rates were observed at 24 h at an initial nitrate concentration of 50 mg/L; 1.94 d−1 and 0.22 d−1 for 0 and 810 mg/L ZnO NPs, respectively. Nitrate uptake by algal biomass reached up to 40.1% after 96 h of operation in the control culture with an initial nitrate concentration of 50 mg/L. Finally, the results of this study showed the need for the investigation of ZnO NPs toxicity on microalgae under optimum and stressful nutrient conditions for microalgae growth.

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“…Chlorococcum sp. is used in various industries, such as food, aquaculture, pharmaceutical, wastewater treatment, and biofuel production [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Short-Term Toxicity of ZnO Nanoparticles on Microalgae at Different Initial Nutrient Concentrations

2023

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“…In particular, the formation of dry biomass of microalgae belonging to the genera Ankistrodesmus, Botryococcus, Scenedesmus, Chlorella, and Chlorococcum has been studied (Haydarov et al, 2020a). According to the obtained results, microalgae Ankistrodesmus sp.15.…”

Section: Use Of Microalgae In Uzbekistanmentioning

confidence: 99%

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2023

Int.J.Curr.Microbiol.App.Sci

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This article provides information on the problems and prospects of production processes based on microalgae and macrophytes in the conditions of Uzbekistan. The research works conducted in Uzbekistan on the use of microalgae in fisheries, the importance of microalgae in the cultivation of zooplankton, wastewater treatment based on higher algae, that is, macrophytes, and the use of Azolla and small ryaska in the production of feed and supplements are described. Based on research, the dependence of protein and fat storage, which determines the nutritional value of microalgae, was studied on the generations of microalgae, and it was noted that the accumulation of protein and fat by microalgae differed sharply from each other in the Chu-13 feed medium. According to the obtained results, it is recommended to use Botryococcus and Chlorococcum genera strains in obtaining feed with complete nutritional content for the aquaculture industry. Also, in this research work, microalgae (Botryococcus, Chlorococcum), which are one of the essential links in the food chain of zooplanktons used as a live feed, are recommended as a natural food source in the artificial cultivation of zooplanktons. New nutrient media was developed based on mixtures of macrophytes Lemna minor L. flour (protein -16.10%), wheat bran (protein -14.2%), and Azolla carolina L. (protein -27.6%). Also, as a result of the implementation of the technology of industrial cultivation of Lemna minor macrophyte, the composition of expensive feed products such as wheat flour, wheat bran, corn flour, and soybean meal, is used for the cultivation of nutritious insects and macrophytes, which are non-traditional sources of food, was improved based on azolla and small ryaska. It is also recommended for the biological treatment of chromium-contaminated wastewater based on highalgae Azolla. In particular, it was noted that the tolerance of higher algae to chromium is different. In studies of the tolerance of different types of higher algae to chromium, it was noted that Azolla is somewhat resistant to other higher algae in the experiment.

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The Role of Microalgae in the Cultivation of Zooplankton (Daphnia)

Cited by 2 publications

References 0 publications

Short-Term Toxicity of ZnO Nanoparticles on Microalgae at Different Initial Nutrient Concentrations

Short-Term Toxicity of ZnO Nanoparticles on Microalgae at Different Initial Nutrient Concentrations

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