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Water biofloc microorganism enhance shrimp resistance to microplastics 认领 引用
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作者 Xin Hu Yvfei Wu +3 位作者 Yixin Tang Wenchang Liu Hongxin Tan Guozhi Luo 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第6期559-571,共13页
Microorganisms play a crucial role in modifying the physical-chemical properties and ecotoxicological effects of microplastics(MPs)in aquatic ecosystems.However,existing studies have not been conducted in actual aquac... Microorganisms play a crucial role in modifying the physical-chemical properties and ecotoxicological effects of microplastics(MPs)in aquatic ecosystems.However,existing studies have not been conducted in actual aquaculture environments,which are typically enriched with a variety of microorganisms.To address this,we have investigated the potential of water biofloc to mitigate MPs contamination in Litopenaeus vannamei aquaculture systems.Here,shrimps were subjected to varying concentrations of MPs in clean water and biofloc water.Results showed that clean water group displayed significantly lower survival rate(65.28%±8.67%)and diminished immune enzymes(i.e.,lysozyme and polyphenol oxidase)activities compared to the water biofloc treatment(p<0.05).Significant differences were observed in the activities of digestive enzymes,antioxidant enzymes and Na+/K+-ATPase in the clear water and biofloc water treatments(p<0.05).Notably,biofloc treatments maintained consistent proximate composition and enzymatic activities(p<0.05),while demonstrating remarkable microbial community stability between aqueous and intestinal habitats that proved resilient to MPs exposure.However,biofloc microorganisms significantly reduced shrimp astaxanthin content(49.24%),leading to declines in pigmentation,water-holding capacity,and muscle adhesiveness.These findings offer a theoretical foundation for assessing MPs-related risks in aquaculture and advancing ecologically sustainable shrimp farming.In addition,our study provides practical insights for promoting cleaner and more sustainable aquaculture practices. 展开更多
关键词 Water biofloc Microparticle Microbiome Astaxanthin Aquaculture
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Chicken Eggshell as an Innovative Bioflocculant in Harvesting Biofloc for Aquaculture Wastewater Treatment 认领 引用
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作者 Hajjar Hartini Wan Jusoh Nor Azman Kasan +4 位作者 Hidayah Manan Nurfarahana Mohd Nasir Fareza Hanis Mohd Yunos Sofiah Hamzah Ahmad Jusoh 《Journal of Renewable Materials》 SCIE EI CAS 2023年第5期2321-2332,共12页
Implementation of biofloc technology(BFT)system in aquaculture industry shows high productivity,low feed conversion ratio,and an optimum culture environment.This study was divided into two phases.The first phase invol... Implementation of biofloc technology(BFT)system in aquaculture industry shows high productivity,low feed conversion ratio,and an optimum culture environment.This study was divided into two phases.The first phase involved maintaining the water quality using the optimum carbon-to-nitrogen ratio by manipulating pH in culture water.The second phase examined the performance of harvesting biofloc(remaining phytoplankton and suspended solids in the system)using chicken eggshell powder(CESP).This study showed that pH 7 to 8 were the best biofloc performance with high removal percentage of ammonia(>99%)with a remaining ammonia concentration of 0.016 mg L−1and 0.018 mg L−1,respectively.The second phase of this study was performed to determine the optimal formulation and conditions of using CESP as a bio-flocculant in harvesting excess biofloc.The use of eggshell showed a higher harvesting efficiency of more than 80%under the following treatment conditions:0.25 g L−1of eggshell dosage;with rapid and slow mixing rates of 150 and 30 rpm,respectively;30 min of settling time;settling velocity of 0.39 mm s−1and pH of 6 to 7.Therefore,the results indicated that biofloc would be the best green technology approach for sustainable aquaculture wastewater and the CESP is an organic matrix that environmental-friendly bio-coagulant for biofloc harvesting. 展开更多
关键词 Chicken eggshell aquaculture biofloc coagulant water quality harvesting
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Effects of Different Carbon Sources on the Water of Aristichthys nobilis Richardson Aquaculture by Biofloc 认领 引用 被引量：1
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作者 JIANG Yan-xia YANG Jun +3 位作者 GUAN Gui-ping LIU Bo-cheng WANG Hui WANG Hong-bing 《Agricultural Science & Technology》 CAS 2020年第4期58-62,共5页
In order to explore the effects of different carbon sources on the water of Aristichthys nobilis Richardson culture by biofloc as well as regular,glucose,sucrose,dextrin,brown sugar and molasses 5 soluble carbon sourc... In order to explore the effects of different carbon sources on the water of Aristichthys nobilis Richardson culture by biofloc as well as regular,glucose,sucrose,dextrin,brown sugar and molasses 5 soluble carbon source were added into the water of Aristichthys nobilis Richardson culture containing a certain amount of ammonia nitrogen,nitrite nitrogen to research their effects on pH value,dissolved oxygen,ammonia-nitrogen,nitrite nitrogen value.The results showed that sucrose had the best effect in converting ammonia nitrogen and nitrite nitrogen;glucose and dextrin had significant effect in converting ammonia nitrogen.However,compared with sucrose,glucose and dextrin had bad effect in converting nitrite nitrogen molasses had bad effect in converting ammonia nitrogen and nitrite nitrogen,and had little effect on pH value and dissolved oxygen;glucose,sucrose and dextrin had significant effect in decreasing pH value and dissolved oxygen;brown sugar had good effect in converting nitrite nitrogen,whereas it had little effect in converting ammonia nitrogen.Therefore,sucrose was the best carbon source,and if the cost factor was taken into account,glucose also had a high cost performance. 展开更多
关键词 Biofloc Carbon source pH value Dissolved oxygen Ammonianitrogen Nitrite nitrogen
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Sexual Reversal with 17α-Methyltestosterone in Oreochromis sp.:Comparison between Recirculation Aquaculture System(RAS)and Biofloc Technology(BFT) 认领 引用
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作者 Carlos Arturo David-Ruales Eliana Marcela Betancur-Gonzalez Ruben Dario Valbuena-Villareal 《Journal of Agricultural Science and Technology(A)》 2019年第2期131-139,共9页
Precocity in tilapia implies the use of several methods of obtaining monosex seed;the most common tends to use masculinizing hormone 17α-methyltestosterone(17αMT),with variable results.Thus the objective of this stu... Precocity in tilapia implies the use of several methods of obtaining monosex seed;the most common tends to use masculinizing hormone 17α-methyltestosterone(17αMT),with variable results.Thus the objective of this study was to compare the efficiency of the sexual reversion process using 17αMT,in a recirculation system and in biofloc.In a totally randomized design,three tanks for recirculation(T-RAS)and three tanks for biofloc(T-BIO)with a capacity of 200 L effective volume were taken and filled with 1,056 larvae of Oreochromis sp.,without reversing and with an initial weight of 0.02 g and an initial total length of 1.4 mm.The study was carried out during 65 d,the fish were fed(10%biomass,adjusted every 15 d)by a commercial diet at 45%of crude protein that included 17αMT(60 mg/kg).Water quality,microbiology,zootechnical and gonadal analysis were monitored.Consequently the water quality results showed that just dissolved oxygen(DO),temperature(T-°C)and alkalinity did not show significant differences.Additionally,in the productive parameters there were significant differences in the final length,the gain in length and in K which were better in T-BIO.The microbiological ones did not present significant differences between the treatments.Lastly,the percentage of reversion was significantly better in T-RAS.Then,this study suggests that settleable solids concentrations above 35 cm decrease the efficiency of the sexual reversion for this species. 展开更多
关键词 Oreochromis sp. biofloc recirculation aquaculture system 17α-methyltestosterone
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Applied Biofloc Technology for Target Species in the Mekong Delta in Vietnam: A Review 认领 引用
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作者 Nguyen Van Hoa Ta Van Phuong +7 位作者 Tran Ngoc Hai Chau Tai Tao Le Quoc Viet Nguyen Thi Hong Van Huynh Thanh Toi Tran Huu Le Vo Nam Son Pham Quoc Anh Duy 《Journal of Environmental Science and Engineering(B)》 CAS 2017年第4期165-175,共11页
BFT （Biofloc Technology） has been currently applied in Cantho University to a number of targeted species from fresh-to marine and saline water species in the Mekong Delta, e.g. striped catfish （Pangasianodon hypoph... BFT （Biofloc Technology） has been currently applied in Cantho University to a number of targeted species from fresh-to marine and saline water species in the Mekong Delta, e.g. striped catfish （Pangasianodon hypophthalmus）, white leg shrimp （Litopenaeus vannamei）, tiger shrimp （Penaeus monodon） and Artemia Vinhchau strain （Artemia franciscana） for both in the lab-scales or production scales. The best growth and survival rate of striped catfish was obtained in 6%o. For white leg shrimp, the results indicated： （1） C （Carbon） source e.g. rice-flour or molasses supplementary based on the feed provided to promote survival, growth and shrimp biomass harvested; （2） it was fed less than 20% as usual but showed similar to those in the control; （3） combination of rice-flour and molasses at a ratio of 70：30 by weight of C and N （Nitrogen） in a ration of 15：1 enhanced shrimp survival and growth; （4） in intensive culture, shrimp could be against the infection of disease and end up with higher survival, growth in earthen ponds. For tiger shrimp, a set up for larvae till post larvae at different ratios of C and N and C：N of 30 PLI5 displayed with better survival rate （49.73 ± 7.07%） and production （74,596 ± 10.608 PL/m3）. Artemiafranciscana was set up at C：N = 10：1 and salinities from 35, 60, 80 and 100 ppt. After two weeks, there were no significant difference among treatment and the control （without biofloc） in term of survival and growth. Moreover, total embryos per female was not significant different with the control and even the number of embryos as cysts tended to be higher. BFT displayed its advantages when applied on culture system of different targeted species and there is no doubt that it could help to sustain aquaculture and save environment in the Mekong Delta in near future. 展开更多
关键词 Biofloc techology striped catfish white leg shrimp tiger shrimp Artemia Vinhchau strain.
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Effects of Bioflocs on Artemia Growth and Water Quality 认领 引用
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作者 WANG Jiao SUI Liying DENG Yuangao 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2014年第S1期111-113,共3页
1 Introduction Bioflocs is a heterogeneous mixture of the microorganisms,particles,organic polymers and dead cells,etc.(Hargreaves,2006).Among which,heterotrophic bacteria convert efficiently the ammonia nitrogen into... 1 Introduction Bioflocs is a heterogeneous mixture of the microorganisms,particles,organic polymers and dead cells,etc.(Hargreaves,2006).Among which,heterotrophic bacteria convert efficiently the ammonia nitrogen into the bacterial protein,which provides the supplementary feed for culture animals and reduces the nitrogen level in the culture system(De Schryver et al,2008).In the closed aquaculture system,the growth of 展开更多
关键词 Artemia bioflocs carbon salinity water quality microbial diversity
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Bioeconomic analysis of the commercial production of Nile tilapia with biofloc and green water technologies 认领 引用 被引量：1
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作者 Berenice Suarez-Puerto Marcelo Araneda Mariel Gullian-Klanian 《Aquaculture and Fisheries》 CAS CSCD 2025年第1期149-162,共14页
This study presents a bioeconomic model after analyzing the commercial profitability of Nile tilapia under biofloc(BFT)and green water(GWT)technologies.Environmental stochasticity was evaluated using the parameters ob... This study presents a bioeconomic model after analyzing the commercial profitability of Nile tilapia under biofloc(BFT)and green water(GWT)technologies.Environmental stochasticity was evaluated using the parameters obtained in Yucatan’s rainy(RN)and dry(DR)seasons.The productive impact was measured by analyzing the 10-year cash flow.Both systems demonstrated profitability with a positive NPV and 450 g harvest weight in the short term.The unit cost of production results for the GWT was lower than for the BFT.The long-term simulation involved an investment of $410,279 USD for 30 tanks,resulting in a positive return for GWT.BFT showed negative long-term profitability at the current selling price($2.36 USD/kg).Profitability improved as the sales price increased by 11% and 22% for RN-BFT and DR-BFT,respectively.This bioeconomic model is pioneering in tilapia production in BFT and GWT and provides valuable data to achieve better yield and profitability. 展开更多
关键词 Tilapia Bioeconomic analysis Risk analysis Biofloc Green water
Influence of different percentages of water reuse with bioflocs on the composition of the microbiota in the stomach of Penaeus vannamei shrimp 认领 引用
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作者 Natália Pereira San Martin Wilson Wasielesky Jr +2 位作者 Francesca Cucchi Wellica Gomes dos Reis Dariano Krummenauer 《Aquaculture and Fisheries》 CAS CSCD 2025年第5期867-877,共11页
The objective of this study was to analyze the stomach composition of Penaeus vannamei shrimp in biofloc cultures with varying percentages of reused bioflocs to identify the optimal culture conditions based on microor... The objective of this study was to analyze the stomach composition of Penaeus vannamei shrimp in biofloc cultures with varying percentages of reused bioflocs to identify the optimal culture conditions based on microorganism content.Four treatments were employed:clear water(CW),25%biofloc inoculum(BF 25%),50%biofloc inoculum(BF 50%),and 100%biofloc inoculum(BF 100%).Bioflocs were reused from mature bioflocs of previous cultures in biofloc treatments.Shrimp performance was monitored weekly through biometrics,and stomach samples were collected at the experiment's onset and conclusion.The samples underwent fixation in 4%formaldehyde for subsequent counting and identification of predominant microorganism groups using an inverted microscope.Bacterial abundance was assessed by fixing,filtering,and staining samples with acridine orange,followed by quantification with an epifluorescence microscope.Water quality parameters remained satisfactory in all treatments.Shrimp stomachs in biofloc systems contained Oocystis sp.,ciliates,flagellates,diatoms,free coccoids,free and attached filamentous,Bacillus spp.,and Vibrio spp.CW treatment exhibited the highest Vibrio spp.concentration.Overall,reusing bioflocs in all volume percentages effectively maintained water quality and colonized the animal's microbiota,with a recommended minimum reuse percentage of 25%for satisfactory results. 展开更多
关键词 Bacteria Biofloc Intensive system Microorganisms Water reuse
Reusing biofloc-culture water and microbubble aeration for culturing the white-leg shrimp Litopenaeus vannamei 认领 引用
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作者 Ezzah Rahimah Samsuri Poobalan Ganesan +2 位作者 Iswadi Jauhari Geok Yuan Annie Tan Faik A.Hamad 《Aquaculture and Fisheries》 CAS CSCD 2025年第4期687-695,共9页
This study investigated the effects of reusing biofloc-culture water for culturing the white-leg shrimp Litopenaeus vannamei.Experiments were conducted for two continuous cycles without water exchange for 30 days duri... This study investigated the effects of reusing biofloc-culture water for culturing the white-leg shrimp Litopenaeus vannamei.Experiments were conducted for two continuous cycles without water exchange for 30 days during the nursery stage.The studies were performed with two different aeration systems,namely microbubbles(MB)and large air bubbles(LB).Water quality parameters such as dissolved oxygen(DO),temperature,pH,salinity,alkalinity,total ammonia nitrogen(TAN),nitrite,nitrate,settleable solids(SS),and total suspended solids(TSS)were recorded throughout the culture days.Also,comparisons were performed on parameters of the shrimp growth,i.e.,body weight and length,feed conversion ratio(FCR),and specific growth rates(SGR)for the 30-day culture for Cycles 1 and 2.Cycle 2 showed no deterioration in water quality and no significant difference in growth performance compared to Cycle 1 for either aeration method(MB and LB).However,when comparing between aeration methods,MB aeration significantly improved the DO of the water and accelerated the conversion of TAN to nitrate.Shrimps in the MB aeration system were significantly larger(by 39%)with a lower FCR value(reduced by 30%)than in the LB aeration system.Harmful bacteria from the Vibro group were detected.However,they occurred at a minimum level in both cycles and aeration types.Overall,the biofloc-culture water might be reused for the subsequent cycle,while the MB aeration might promote the growth of biofloc and L.vannamei. 展开更多
关键词 Aquaculture Biofloc Feed conversion ratio(FCR) Litopenaeus vannamei Microbial community Microbubble aeration
Biofloc biosecurity:A revolutionary paradigm in augmenting aquaculture health and resilience against Aeromonas hydrophila 认领 引用
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作者 Hossam M.Hwihy Amr F.Zeina +1 位作者 Mohamed Sh Abu Husein Mohamed A.M.El-Tabakh 《Aquaculture and Fisheries》 CAS CSCD 2025年第4期608-616,共9页
This research embarked upon an in-depth exploration of the pioneering concept of biofloc biosecurity,assessing its instrumental role in amplifying fish growth dynamics,hematological indices,biochemical metrics,chemica... This research embarked upon an in-depth exploration of the pioneering concept of biofloc biosecurity,assessing its instrumental role in amplifying fish growth dynamics,hematological indices,biochemical metrics,chemical body composition,and immunological defenses,both pre-and post-infection by Aeromonas hydrophila.By juxtaposing biofloc-reared Oreochromis niloticus against traditionally reared fish,intricate observations of histopathological changes and clinical symptomatology were undertaken.Employing 16S RNA,the bacterial strain Aeromonas hydrophila(ATCC 7966)was precisely identified and banked It into gene bank and given accession number(OR452335).After a preparatory period of ten weeks in the Biofloc system,O.niloticus faced a challenge with Aeromonas hydrophila.Empirical findings revealed that fish from the Biofloc cohort displayed marked advancements across all investigational parameters,before and after infection,as opposed to the control set.In the aftermath of the Aeromonas hydrophila confrontation,biofloc-acclimatized fish manifested an elevated resilience against the bacterial onslaught,displaying superior metrics in growth,hematology,biochemistry,body constitution,and immunological response.Biofloc group showed a strong immune response,particularly in terms of Lysozyme and Total Antioxidant Capacity.Additionally,there was a significant impact on Immunoglobulin and Complement 3 after infection,highlighting the group's increased immune activity.Furthermore,these fish attenuated the pernicious morphological indicators and histopathological anomalies instigated by septicemic bacteria,which otherwise inflict substantial economic detriments upon the aquaculture industry.This research underscores the immense promise biofloc biosecurity holds in bolstering the overall health and performance metrics of cultured O.niloticus. 展开更多
关键词 Oreochromis niloticus Biofloc Hematology Biochemical Immune response Aeromonas hydrophilia
Synergistic effects of Recirculating Aquaculture System(RAS)with combination of clear water,probiotic and biofloc technology:A review 认领 引用 被引量：1
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作者 Muhammad Taufik Tuan Ismarani Tuan Ismail +7 位作者 Hidayah Manan Mhd Ikhwanuddin Amir Ihsan Abdul Salam Ahmad Ideris Abdul Rahim Ahmad Najmi Ishak Amyra Suryatie Kamaruzzan Ahmad Shuhaimi Draman Nor Azman Kasan 《Aquaculture and Fisheries》 CSCD 2024年第6期883-892,共10页
Recirculating Aquaculture System(RAS)is introduced in aquaculture farming industry to reduce water resource utilization,efficient the energy and land uses,and also help minimalize the water exchange.This system enable... Recirculating Aquaculture System(RAS)is introduced in aquaculture farming industry to reduce water resource utilization,efficient the energy and land uses,and also help minimalize the water exchange.This system enables utilization of unsuitable land and promotes a sustainable environment in aquaculture industry.Furthermore,this technology has been established and proved efficient in monitoring the aquatic animal condition subsequently helps in maintaining the water quality and help remove solid particle wastes from the aquaculture treatment.As today,RAS has been developed with more effective technologies such as the use of UV irradiation,solid capture,protein skimmer and also provided with highly techno bio-filtration set.Basically,this system was applied for broodstock maturation,nursery phase,and grow-out production.In this review article,we provide an overview of RAS between the clear water,probiotic,and biofloc technology,and the advantages of its combination.Even though RAS and biofloc is two different parallel system,the application of the probiotic and biofloc in the semi-RAS application system is intense to be investigated.The synergistic effect of RAS using this combination towards high yield aquaculture production will be highlighted in this review paper.Expectantly this review paper will generate awareness and useful information on the RAS application in the aquaculture system operation with help in maximize the impact to the aquaculture yield production. 展开更多
关键词 Biofloc Aquaculture Green-technology Probiotic Biofloc technology Feed cost
Comparing salinities of 0, 10 and 20 in biofloc genetically improved farmed tilapia (Oreochromis niloticus) production systems 认领 引用 被引量：5
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作者 Guozhi Luo Wenqing Li +1 位作者 Hongxin Tan Xiaoqing Chen 《Aquaculture and Fisheries》 2017年第5期220-226,共7页
A 150 days(150-d)experiment was carried out to investigate the production efficiency,inorganic nitrogen syndrome and bacteria community of indoor biofloc technology(BFT)systems used to rear genetically improved farmed... A 150 days(150-d)experiment was carried out to investigate the production efficiency,inorganic nitrogen syndrome and bacteria community of indoor biofloc technology(BFT)systems used to rear genetically improved farmed tilapia(Oreochromis niloticus)under 0(S-0),10(S-10),and 20 salinities(S20).The start-up period for BFT was 50,60 and 80 d for S-0,S-10 and S-20 groups,respectively.At steady state,the total ammonium nitrogen(NH4þ-N)and nitrite nitrogen(NO2-N)were lower than 3.0 mg/L and 0.34 mg/L,respectively and no nitrate-nitrogen(NO3-N)accumulation was observed.The fish survival rate was above 95%for all the groups.The final fish biomass of the S-10 group(35.83±1.08 kg/m3)was not significantly different from the S-0(34.79±1.33 kg/m3)group but was significantly higher than S-20(32.6±1.04 kg/m3).The feed conversion ratio for the tilapia in S-20 was 1.46,which was higher than the ratio in S-0(1.40)and S-10(1.39)tilapia.There was no significant difference in the crude protein content of the back muscle from tilapia of the three experimental groups.No significant difference in blood parameters,except for aspartate aminotransferase and alkaline phosphatase was observed between the three groups.Evaluation of microorganisms in the three BFT systems revealed that Proteobacteria,Bacteroidetes,and Fusobacteria were the top three at the phylum level in all groups.However,a significant difference was observed at the genus level in the bacteria of the three BFTs at different salinity(P<0.05).©2017 Published by Elsevier B.V.on behalf of Shanghai Ocean University.This is an open access article。 展开更多
关键词 Genetically improved farm tilapia(GIFT) Tilapia Bioflocs technology Growth performance Bacteria community Inorganic nitrogen
Dynamics of nitrogenous compounds and their control in biofloc technology (BFT) systemsA review 认领 引用 被引量：3
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作者 Godwin Abakari Guozhi Luo Emmanuel O.Kombat 《Aquaculture and Fisheries》 2021年第5期441-447,共7页
Controlling toxic nitrogenous substances in biofloc technology(BFT)systems is critical for the success of this novel technology.To effectively control nitrogen accumulation in BFT systems,it is important to first unde... Controlling toxic nitrogenous substances in biofloc technology(BFT)systems is critical for the success of this novel technology.To effectively control nitrogen accumulation in BFT systems,it is important to first understand the dynamics and the removal pathways of this element and its related compounds from aquaculture water.This review focuses on synthesizing the information of nitrogen dynamics in BFT systems to provide researchers and practitioners with a guide to the fate of nitrogen and its control methods.This paper discusses the different types of nitrogenous compounds in BFT water,the transformation processes of ammonia to nitrites and nitrates,the relationship between the two forms of ammonia(NH3 and NH4+)in water and the equilibrium between them.This paper also discusses nitrification as a major nitrogen removal pathway and the factors that influence the nitrification process.Notably,the control of nitrogen in BFT systems by manipulating the carbon to nitrogen ratio(C/N)using external carbohydrates is described in this paper.This paper suggests that further studies should focus on investigating the various factors that influence nitrogen dynamics in BFT systems and the means of controlling contaminants other than nitrogen. 展开更多
关键词 Biofloc technology Nitrification Nitrogen dynamics Heterotrophic Nitrifying bacteria
Performance of feeding Artemia with bioflocs derived from two types of fish solid waste 认领 引用 被引量：1
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作者 Miaolan Yao Guozhi Luo +2 位作者 Hongxin Tan Lipeng Fan Haoyan Meng 《Aquaculture and Fisheries》 2018年第6期246-253,共8页
The production of bioflocs with the solid waste from recirculating aquaculture systems(RAS)and feeding Artemia results in additional nutrient retention and lowers waste discharged from RAS.The solid waste from the dru... The production of bioflocs with the solid waste from recirculating aquaculture systems(RAS)and feeding Artemia results in additional nutrient retention and lowers waste discharged from RAS.The solid waste from the drumfilters of two RAS,which stocked European eel(Anguilla anguilla)and Nile tilapia(Oreochromis niloticus),was used as substrate to produce bioflocs in suspended growth reactors,referred to as E-flocs and T-flocs,respectively.Mono-diets consisting of 100%E-flocs and 100%T-flocs were added to culture Artemia,referred as E-Artemia and T-Artemia,respectively,in a laboratory scale test.The efficiency of this feeding regime was investigated.A significant difference was observed in terms of crude protein content(35.59±0.2%)for E-flocs,(29.29±0.95)%for T-flocs,(70.01±0.92)%for E-Artemia and(65.63±0.89)%for T-Artemia.134 out of the total operational taxonomic units(OTUs)were present in E-flocs and T-flocs from the analysis of high-throughput sequencing data.Most of the shared OTUs belonged to cyanobacteria.C18:1n7 of T-flocs was higher than that of E-flocs(P0.05).The survival rate of E-Artemia was(22±0.02)%,significantly higher than that of T-Artemia(16%±0.02%)(P0.05).The EPA of Artemia fed with E-flocs was(3.00±0.46)%,significantly higher than that of T-Artemia(1.57±0.19%)(P<0.05).This study offers a method for reusing the aquaculture waste,which will be helpful to achieve a zero-pollution discharge for aquaculture systems. 展开更多
关键词 Bioflocs Fish waste Artemia Recirculating aquaculture system Suspended growth reactors
生物絮团养殖对彭泽鲫卵巢发育影响的代谢组学研究 认领 引用
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作者 钟佳慧 张燕萍 +7 位作者 崔佳勤 吴子君 阙祥尧 余建芳 丁立云 张桂芳 罗国芝 章海鑫 《水产科学》 CAS CSCD 北大核心 2026年第3期367-379,共13页
本研究旨在探究生物絮团技术对彭泽鲫卵巢发育的影响、以初始体质量约60 g的彭泽鲫雌鱼为研究对象,随机分为4个养殖组:对照组[总悬浮物(TSS)0 mg/L]、200 mg/L质量浓度组(总悬浮物200 mg/L)、400 mg/L质量浓度组(总悬浮物400 mg/L)和600... 本研究旨在探究生物絮团技术对彭泽鲫卵巢发育的影响、以初始体质量约60 g的彭泽鲫雌鱼为研究对象,随机分为4个养殖组:对照组[总悬浮物(TSS)0 mg/L]、200 mg/L质量浓度组(总悬浮物200 mg/L)、400 mg/L质量浓度组(总悬浮物400 mg/L)和600 mg/L质量浓度组(总悬浮物600 mg/L),试验周期56 d,期间通过添加葡萄糖以保证生物絮团养殖组碳氮比为15,试验结束后测定各组形体指标、繁殖性能及血清生化指标,并采用液相色谱与质谱联用非靶向代谢组学技术分析卵巢组织代谢物组成及含量变化,通过多元统计分析鉴定显著差异代谢物并进行代谢通路富集分析。试验结果显示:在形体指标方面,对照组肝体比、脏体比和肥满度分别比600 mg/L质量浓度组高出35.90%、6.88%和6.89%(P200 mg/L质量浓度组>400 mg/L质量浓度组>600 mg/L质量浓度组;对照组卵巢中以Ⅳ期卵细胞为主,600 mg/L质量浓度组以Ⅰ期和Ⅱ期为主。血清生化检测显示,对照组彭泽鲫血清中雌二醇、甘油三酯和总胆固醇含量分别比600 mg/L质量浓度组高出10.37%、3.74%和15.11%。代谢组学分析显示,相较于对照组,600 mg/L质量浓度组卵巢组织存在107个差异代谢物(VIP>1,P<0.05),主要为氨基酸多肽类似物、脂肪酸类、甘油磷脂类以及类固醇和类固醇衍生物;共富集于37条通路,其中促性腺激素释放激素、雌激素信号通路、精氨酸和脯氨酸代谢、神经活性配体与受体的相互作用、β-丙氨酸代谢、甘油磷脂代谢等与生殖调控密切相关的通路均呈下调趋势。结果表明,总悬浮物质量浓度为600 mg/L的生物絮团养殖对彭泽鲫卵巢发育有抑制作用,通过下调促性腺激素释放激素、雌激素信号、氨基酸代谢和脂类代谢等通路的表达形成协同抑制效应。 展开更多
关键词 彭泽鲫 生物絮团 卵巢发育 性腺指数 代谢通路
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凡纳滨对虾养殖系统中生物絮团的形成机制及外源微生物调控作用研究进展 认领 引用
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作者 李智 孙卜文 +3 位作者 吴卓晗 刘海燕 肖娜思 李清扬 《南京农业大学学报》 CAS CSCD 北大核心 2026年第4期742-751,共10页
凡纳滨对虾(Litopenaeus vannamei)是我国水产养殖业的支柱物种,随着市场需求持续增长和养殖技术不断进步,其养殖模式正向超高密度方向发展。生物絮团(biofloc)技术在提升水产养殖效益、改善水质、防控病害等方面发挥着关键作用,已成为... 凡纳滨对虾(Litopenaeus vannamei)是我国水产养殖业的支柱物种,随着市场需求持续增长和养殖技术不断进步,其养殖模式正向超高密度方向发展。生物絮团(biofloc)技术在提升水产养殖效益、改善水质、防控病害等方面发挥着关键作用,已成为凡纳滨对虾超高密度养殖体系中不可或缺的核心技术。然而,关于生物絮团通过哪些特定微生物类群改善生长性能和水体质量,以及通过何种途径调控水生动物的免疫功能这两个关键机制问题仍存在不小的争议。并且外界影响因素复杂多样,难以稳定培养出良性的生物絮团系统,严重制约其推广应用。近年的研究证实,微生物群落是调控生物絮团系统的根本要素,与调节碳氮比和添加碳源等经典的调控策略相比,添加益生菌和微藻能够更稳定、有效地改善生物絮团系统,该方向研究已成为生物絮团领域的热点方向。本文综合分析了有关生物絮团作用机制的多种观点,梳理和评估了影响其稳定性的关键因素;在此基础上,重点探讨了外源微生物的种类和添加量对凡纳滨对虾生长性能、免疫状态、养殖水质以及生物絮团群落结构的综合影响,并对未来研究方向进行了展望,以期为提高生物絮团养殖系统的稳定输出、实现凡纳滨对虾的绿色、健康养殖提供科学依据。 展开更多
关键词 凡纳滨对虾 生物絮团 高密度养殖 外源微生物
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Effect of seeding biofloc on the nitrification establishment in moving bed biofilm reactor(MBBR) 认领 引用 被引量：3
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作者 Hanwen Zheng Guozhi Luo +3 位作者 Godwin Abakari Guoji Lv Hongxin Tan Wenchang Liu 《Aquaculture and Fisheries》 CSCD 2023年第6期617-625,共9页
In recirculating aquaculture systems,nitrification is usually accelerated by inoculating nitrifier or mature biocarriers.In this study,the performance of the establishment of nitrification in the MBBR according to thr... In recirculating aquaculture systems,nitrification is usually accelerated by inoculating nitrifier or mature biocarriers.In this study,the performance of the establishment of nitrification in the MBBR according to three different strategies:conventional method(Control group A),inoculation with biofloc recovered from a tilapia biofloc culture system(Group B),and addition with extra nitrite(Group C)in the Moving bed biofilm reactor(MBBR)was compared.Among them,the biofloc-inoculated group considerably accelerated the nitrification process in the MBBR(38 d),which is roughly 18 d faster than the control group(A)(56 d)and 21 d faster than group C(59 d).Less ammonia(8 mg/L NH4+-N,10 mg/L in other groups)and external nitrite(2 mg/L NO2-N)in the influent caused effluent ammonia to drop more slowly(5 d slower than the control group,8 d slower than the B group),which is detrimental to the nitrification process’development.Notably,the influent’s hydraulic retention time(HRT)was reduced from 12 h to 6 h following the successful establishment of nitrification.During the adaptation to reduced HRT,the MBBR inoculated with biofloc experienced short-term changes in the water quality index of the effluent water,whereas the other groups did not.The biofilm seeded with biofloc had the highest mean gray value ratio(1.42)of live/dead cell fluorescence,which grew better and could cover the entire groove under multiple microscope observations.However,the other groups did not demonstrate a similar trend.In summary,the research found that seeding biofloc use as nitrification bioaugmentation into the MBBR of the recirculating aquaculture system(RAS)to greatly speed up the nitrification process. 展开更多
关键词 Recirculating aquaculture system Moving bed biofilm reactor Nitrification Biofloc Bioaugmentation
Fish culture in biofloc technology(BFT):Insights on stocking density carbon sources,C/N ratio,fish nutrition and health 认领 引用 被引量：2
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作者 Luciana Kelly Oliveira Wilson Wasielesky Jr Marcelo Borges Tesser 《Aquaculture and Fisheries》 CSCD 2024年第4期522-533,共12页
The growth of aquaculture demands intense consumption of formulated foods,scarce natural resources such as water and land.The increase in aquaculture production needs to be sustainable in several aspects of the activi... The growth of aquaculture demands intense consumption of formulated foods,scarce natural resources such as water and land.The increase in aquaculture production needs to be sustainable in several aspects of the activity,including the use of more sustainable farming systems that provide reduced water demand,less space dependence for increased production,and availability of complementary natural food.In this perspective,the biofloc system(BFT),presents itself as a more friendly cultivation technology as a way to mitigate some impacts of aquaculture production.Much research has been carried out,addressing different aspects important to the production of fish in BFT.In this review,we address how stocking density,carbon sources and carbon nitrogen ration(C/N)affect animal performance and the nutritional value of bioflocs;the use of microbial aggregates as“in situ”and“ex situ”food and the benefits in feed conversion,and their influence on the immune system and disease resistance. 展开更多
关键词 Biofloc technology Aquaculture system Natural food Nutritional value Fish health
Biofloc system supplemented by Pseudoalteromonas piscicida 1Ub protects the Pacific white shrimp Penaeus vannamei from Vibrio parahaemolyticus infection 认领 引用 被引量：1
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作者 Muhamad Gustilatov Widanarni Widanarni +2 位作者 Julie Ekasari Pande GdeSasmita Julyantoro Diana Elizabeth Waturangi 《Aquaculture and Fisheries》 CSCD 2024年第6期967-974,共8页
This study aimed to evaluate the supplementation of the probiotic Pseudoalteromonas piscicida 1Ub to the biofloc system as an ecofriendly strategy for protecting white shrimp(Penaeus vannamei)from Vibrio parahaemolyti... This study aimed to evaluate the supplementation of the probiotic Pseudoalteromonas piscicida 1Ub to the biofloc system as an ecofriendly strategy for protecting white shrimp(Penaeus vannamei)from Vibrio parahaemolyticus infection.Shrimp with an average body weight of(0.50±0.09)g were reared in 30 glass jars with a working volume of 2.5 L at a density of 20 ind/L.Shrimp were reared for 5 d for each treatment,which included the biofloc system without and with 106 colony forming unit(CFU)per mL probiotic.The regular clear water system was used as control.All treatment groups were challenged with 103,105,and 107 CFU/mL V.parahaemolyticus.For the negative control,shrimp were reared without V.parahaemolyticus.The results showed that the density of V.parahaemolyticus cocultured with P.piscicida 1Ub decreased and the density of V.parahaemolyticus in rearing water and shrimp body in the probiotic-treated group was lower than that in the control group(P<0.05).The survival and immune response(total hemocyte count,phagocytic activity,respiratory burst,phenoloxidase,and superoxide dismutase)of shrimp in the probiotic group was higher than that in the positive control(P<0.05).Moreover,supplementing the biofloc system with the probiotic could protect shrimp hepatopancreas from damage caused by V.parahaemolyticus,regardless of bacterial density.Thus,the supplementation of the probiotic P.piscicida 1Ub in the biofloc system could significantly protect and increase the resistance of shrimp to V.parahaemolyticus infection. 展开更多
关键词 Aquatic Biocontrol Biofloc Probiotic Pseudoalteromonas piscicida Vibrio parahaemolyticus
原位与异位生物絮团养殖凡纳对虾的比较研究 认领 引用
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作者 朱欣洁 王秀华 +4 位作者 郑磊 杨冰 席瑞 潘明超 胡希立 《渔业科学进展》 CSCD 北大核心 2026年第2期203-213,共11页
为综合评价原位与异位生物絮团在对虾养殖中的应用效果,本研究比较了在零换水条件下,原位生物絮团(IB)与异位生物絮团(EB)养殖系统中,凡纳对虾(Penaeus vannamei)生长性能、血清生理生化及免疫指标的差异,检测了养殖水体与对虾体内弧菌(... 为综合评价原位与异位生物絮团在对虾养殖中的应用效果,本研究比较了在零换水条件下,原位生物絮团(IB)与异位生物絮团(EB)养殖系统中,凡纳对虾(Penaeus vannamei)生长性能、血清生理生化及免疫指标的差异,检测了养殖水体与对虾体内弧菌(Vibrio)载量及养殖水体NH4+-N及NO2--N浓度的变化,同时分析了2个培养方式下絮团内细菌群落组成。结果表明,IB组对虾增重率与特定生长率高于EB组(P0.05);免疫指标中除IB组酚氧化酶(PO)活性显著高于EB组外(P0.05)。在第30、50天IB组水体中弧菌量显著低于EB组(P0.05)。除在第50天时IB与EB组的NH4+-N浓度差异不显著外,其他检测时段IB组NO2--N与NH4+-N浓度均显著低于EB组(P<0.05),IB组中细菌的多样性高于EB组。综上可知,原位絮团在促进对虾生长、改善水质及抑制弧菌方面均优于异位絮团。研究结果为生物絮团对虾养殖模式的推广应用提供了理论支持。 展开更多
关键词 原位絮团 异位絮团 凡纳对虾 养殖效果 综合评价
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