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Comparative Study on Muscle Fiber Characteristics and Muscle Nutritional Quality between Two Groups of Yellow River Carps 被引量:3
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作者 杨又兵 卞军平 +2 位作者 马秀英 王伟 曾珍珍 《Agricultural Science & Technology》 CAS 2017年第8期1432-1436,1483,共6页
The aim was to protect the Henan Yellow River carp germplasm resources and provide a scientific basis for the meat quality improvement of Yellow River carps. With artificially farmed and wild Henan Yellow River carps ... The aim was to protect the Henan Yellow River carp germplasm resources and provide a scientific basis for the meat quality improvement of Yellow River carps. With artificially farmed and wild Henan Yellow River carps as the research objects, comparative study on muscle fiber diameter and density, routine nutritional composition, calcium and phosphorus contents and amino acids composition was conducted between the two groups of carps. The results showed that the moisture content was significantly higher (P 〈0.05), the crude fat and crude protein contents were significantly lower (P〈0.05), the essential amino acids and total amino acids contents were lower (P〉0.05), the phosphorus content was higher (P 〉0.05), and the calcium content was lower (P〉0.05) in the wild group compared with those in the farming group. The analysis of muscle fiber characteristics showed that there were significant differences in the average muscle fiber diameter (P〈0.05) and muscle fiber density (P〈0.01) between the two groups of Henan Yellow River carps. 展开更多
关键词 Yellow River carp PROTEIN Amino acids NUTRIENTS Muscle fiber
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移动自组网的CARPs协议分析
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作者 姚端阳 刘作良 艾宝利 《现代电子技术》 2006年第2期46-48,共3页
移动自组网备受关注的同时也暴露了其在某些方面的局限性,尤其是能量、带宽问题,因此有必要设计最佳路由协议来减少能量消耗、缩短路由、限制泛播,介绍了2种自适应的、无链接的路由协议及其子系统。当采用定向天线时,该协议能减少在分... 移动自组网备受关注的同时也暴露了其在某些方面的局限性,尤其是能量、带宽问题,因此有必要设计最佳路由协议来减少能量消耗、缩短路由、限制泛播,介绍了2种自适应的、无链接的路由协议及其子系统。当采用定向天线时,该协议能减少在分组传送过程中涉及的节点数量,因此减少了能量消耗,充分利用带宽。 展开更多
关键词 移动自组网 位置感知 方向感知 carps协议
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Effects of Nano-sustained Release Sodium Butyrate on Growth and Intestinal Cell Proliferation of Grass Carps
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作者 Jianzhou TANG Qin WU +2 位作者 Xiaojie LI Fufa QU Zhen LIU 《Asian Agricultural Research》 2017年第2期72-74,共3页
Taking grass carps with the initial weight of about 20g as the research object,the basic feeds of grass carps were added with0.0%,0.1%,0.3%,0.6%,0.8%,and 1% of nano-sustained release sodium butyrate to prepare 6 types... Taking grass carps with the initial weight of about 20g as the research object,the basic feeds of grass carps were added with0.0%,0.1%,0.3%,0.6%,0.8%,and 1% of nano-sustained release sodium butyrate to prepare 6 types of experimental feeds with equal nitrogen and energy.The effects of different concentrations of nano-sustained release sodium butyrate were surveyed on growth and intestinal cell proliferation of grass carps.The experiment was carried out in cages with 50 carps per cage,and each treatment was repeated 3 times for60 days.Experimental results indicated that the addition of nano-sustained release sodium butyrate significantly promoted the growth of grass carps and significantly increased the ratio of intestinal villus to crypt depth.When the addition of nano-sustained release sodium butyrate was0.6%,the weight increase rate,specific growth rate,fullness and intestinal villus height of grass carps were the highest,which was significantly higher than that of the control group(P < 0.05).The study results indicated that addition of appropriate amount of nano-sustained release sodium butyrate can promote the growth of grass carps through increasing the intestinal villus height,and the suitable addition dosage was0.6%. 展开更多
关键词 Nano-sustained release sodium butyrate Grass carps Intestinal cell proliferation GROWTH
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Prevalence of Ectoparasitic Infestation in Indian Major Carps During Winter at Different Blocks of South 24-Parganas District, West Bengal, India
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作者 Debapriyo Mukherjee Mayank Soni +1 位作者 Koel Bhattacharya Sanyal Gadadhar Dash 《Journal of Fisheries Science》 2019年第1期7-14,共8页
The study was carried out to find the prevalence of ectoparasites in carp species specifically Indian Major Carps(IMC)during the post monsoon season(November’16 to March’17).Four groups of ectoparasites viz.myxozoan... The study was carried out to find the prevalence of ectoparasites in carp species specifically Indian Major Carps(IMC)during the post monsoon season(November’16 to March’17).Four groups of ectoparasites viz.myxozoan,ciliophoran,monogenean and crustacean were recorded from a total 500 number of carp species like,Labeo rohita,Catla catla,Cirrhinus mrigala and Labeo calbasu collected from different ponds of selected blocks of South 24-Parganas district of West Bengal.The highest prevalence(64.8%)of infestation had been recorded by Myxozoans and the lowest was by Monogeneans(4.8%).The highest and lowest ectoparasitic prevalence in carp was observed in L.rohita(32.9%)and C.catla(27.3%).Beside these,lower temperature(Average 19.3℃),low pH(Average 6.9)and marginal level of dissolved oxygen(Average 6.0ppm)were also created an unfavorable condition for parasitic infestation during this season.At the end of this experiment it was concluded that disease occurrences due to ectoparasites was high in winter with some key factors like temperature,pH and dissolved oxygen(DO). 展开更多
关键词 Ecto-parasites Environment INDIAN major carps PARASITIC frequency index PREVALENCE SOUTH 24-Parganas
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The Potential for Homestead Pond Polyculture of Tilapia and Carps in Coastal Bangladesh
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作者 Md.Abdul Wahab Md.Jimi Reza +2 位作者 Mir Mohammad Ali Md.Nahiduzzaman Michael J.Phillips 《Journal of Fisheries Science》 2019年第1期15-25,共11页
A fishers’women-led Participatory Action Research(PAR)was conducted in 30 homestead ponds to assess the potential for polyculture of Tilapia(Oreochromis niloticus)and major carps Rohu(Labeo rohita)and Catla(Catla cat... A fishers’women-led Participatory Action Research(PAR)was conducted in 30 homestead ponds to assess the potential for polyculture of Tilapia(Oreochromis niloticus)and major carps Rohu(Labeo rohita)and Catla(Catla catla)in two coastal fishing villages of Bangladesh.Three treatments,namely T1(Tilapia 200 fish per decimal;1 decimal=40 m^2),T2(Tilapia 200+Rohu 32+Catla 8 fish per decimal)and T3(Tilapia 200+Rohu 8+Catla 32 fish per decimal),each with 5 replicates,were tried in Hossainpur and Anipara villages.Formulated commercial Mega-feed was applied to the ponds twice daily at an initial rate of 10%body weight(bw)/day of Tilapia down to 4%bw/day throughout the culture period.The water quality parameters of ponds including transparency,salinity and dissolved oxygen significantly varied among treatments except temperature and pH and remained within optimum range for carp polyculture except salinity.The survival rate,harvesting weight and yield of Tilapia were significantly highest in T1(85.63±05%,258.59±18.76 g&11073±805 kg/ha,respectively)in Anipara and lowest in T3(75.63±0.37%,136.97±10.63 g&5180±406 kg/ha,respectively)in Hossainpur.The gross fish production was the significantly highest in T1(11354±806 kg/ha)of Anipara and lowest in T1(6325±227 kg/ha)of Hossainpur.Statistically,the highest net return(866,627±84874 BDT/ha)was found in T1 of Anipara and lowest in T3(279,389±46104 BDT/ha)of Hossainpur with a significantly higher benefit-cost ratio(BCR)obtained in T1(3.26±0.20)for Tilapia and lower in T3(1.58±0.10)for polyculture Tilapia and carp of Hossainpur.Therefore,it may be concluded that Tilapia production in small homestead coastal ponds has a higher potential than its mix with carps in polyculture for generating food and supplemental income opportunity for coastal fishers’women in Bangladesh. 展开更多
关键词 PAR TILAPIA carps POLYCULTURE BANGLADESH
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Prevalence of Argulus sp. in Indian Major Carps from Bhangore Block of South 24 Parganas District, West Bengal, India
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作者 Ratul Chakraborty Debapriyo Mukherjee +3 位作者 Avishek Bardhan Prasenjit Mali Koel Bhattacharya Sanyal Gadadhar Dash 《Journal of Fisheries Science》 2020年第1期5-8,共4页
The study was carried out to find the prevalence and severity of Argulus sp.in Indian Major Carps(IMCs)collected from Bhangore block of South 24 Parganas district of West Bengal during November 2018 to August 2019.Jan... The study was carried out to find the prevalence and severity of Argulus sp.in Indian Major Carps(IMCs)collected from Bhangore block of South 24 Parganas district of West Bengal during November 2018 to August 2019.January(2019)recorded the highest parasitic prevalence(PFI,83.33%)and the month of August(2019)recorded the lowest parasitic prevalence(PFI,9%).The identities of selected parasites were further confirmed by molecular identification through 18S rDNA analysis.The study revealed that Argulus sp.infestations had great economic implications especially in the winter months and is one of the most prevalent problems in fresh water aquaculture systems. 展开更多
关键词 Argulus Bhangore Indian major carps Parasites PREVALENCE SEVERITY
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Little Carps Jump Over the Dragon Gate
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《China Today》 2000年第12期60-60,共1页
关键词 Little carps Jump Over the Dragon Gate
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Impact of the Three Gorges Dam on reproduction of four major Chinese carps species in the middle reaches of the Changjiang River 被引量:19
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作者 黎明政 段中华 +2 位作者 高欣 曹文宣 刘焕章 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2016年第5期885-893,共9页
Silver carp(Hypophthalmichthys molitrix),bighead carp(Aristichthys nobilis),grass carp(Ctenopharyngodon idella),and black carp(Mylopharyngodon piceus) are the four major Chinese carps and are commercially important aq... Silver carp(Hypophthalmichthys molitrix),bighead carp(Aristichthys nobilis),grass carp(Ctenopharyngodon idella),and black carp(Mylopharyngodon piceus) are the four major Chinese carps and are commercially important aquaculture species in China.Reproduction of these carp has declined since the construction of the Three Gorges Dam(TGD) due to an altered water flow and thermal regime in the Changjiang(Yangtze) River.However,details of the changes in reproduction of the four species are not well understood.To assess the impact of the TGD on reproduction of the four carp,we investigated their eggs and larvae at Yidu City,which is 80 km below the TGD,during 2005-2012.We examined differences in larval abundance of the four species in the Jianli section(350 km downstream of the TGD) before(1997-2002)and after(2003-2012) construction of the TGD.Based on these observations,the first spawning date of the four species was delayed a mean of about 25 days after the dam was constructed.Mean egg abundance in the Yidu section of the river was 249 million and mean larval abundance was 464 million,which were significant decreases since the 1980 s.Moreover,larval abundance in the Jianli section after the dam was constructed was significantly lower than that before construction(ANCOVA,P<0.05).The observed larval abundance accounted for only 24.66%of the predicted value in 2003 when the dam was first inundated.The present spawning grounds between the TGD and Yidu section of the river are very similar to those described in the 1980 s,and some spawning grounds exist upstream of the TGD.Large free-flowing stretches upstream of the TGD and the creation of artificially flooded downstream reaches are needed to stimulate spawning and effectively conserve these four major Chinese carps species. 展开更多
关键词 Changjiang(Yangtze) River Three Gorges Dam Chinese carp REPRODUCTION eggs and larvae
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Effects of Benzo[a]pyrene on SOD and CAT in Kidneys from Carps
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作者 Shasha ZHAO Huagen YUAN 《Agricultural Biotechnology》 CAS 2018年第5期124-126,129,共4页
With carps as the object of study, the effects of benzo[a]pyrene concentration on SOD and CAT in carp kidneys were studied. There were three treatment groups and one control group. The exposure method was the static m... With carps as the object of study, the effects of benzo[a]pyrene concentration on SOD and CAT in carp kidneys were studied. There were three treatment groups and one control group. The exposure method was the static method. The superoxide dismutase (SOD) and catalase (CAT) activity was determined 30 d later. The results showed that after exposing to different concentrations of benzo[a]pyrene (0, 0.1, 0.5 and 1.0 μg /L) for 30 d, the SOD activity was higher in the low concentration group (0.1 μg/L) than in the control group; the 0.5 μg/L benzo[a]pyrene group had no significant difference from the control group; and under the concentration of 1.0 μg/L, the SOD activity decreased remarkably. The CAT activity was higher in the 0.1 μg/L group than in the control group, and decreased significantly in the 1.0 μg/L benzo[a]pyrene group compared with the control group. The results showed that benzo[a]pyrene had certain effects on the antioxidant enzymes in carp kidneys. This study provides a theoretical basis for water environmental pollution. 展开更多
关键词 Benzo[a]pyrene CARP Kidney SOD CAT
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Unveiling the emerging role of curcumin to alleviate ochratoxin A-induced muscle toxicity in grass carp(Ctenopharyngodon idella):in vitro and in vivo studies
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作者 Piao Zhao Lin Feng +7 位作者 Weidan Jiang Pei Wu Yang Liu Hongmei Ren Xiaowan Jin Lu Zhang Haifeng Mi Xiaoqiu Zhou 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2024年第4期1638-1656,共19页
Background Ochratoxin A(OTA),a globally abundant and extremely hazardous pollutant,is a significant source of contamination in aquafeeds and is responsible for severe food pollution.The developmental toxicity of OTA a... Background Ochratoxin A(OTA),a globally abundant and extremely hazardous pollutant,is a significant source of contamination in aquafeeds and is responsible for severe food pollution.The developmental toxicity of OTA and the potential relieving strategy of natural products remain unclear.This study screened the substance curcumin(Cur),which had the best effect in alleviating OTA inhibition of myoblast proliferation,from 96 natural products and investigated its effect and mechanism in reducing OTA myotoxicity in vivo and in vitro.Methods A total of 720 healthy juvenile grass carp,with an initial average body weight of 11.06±0.05 g,were randomly assigned into 4 groups:the control group(without OTA and Cur),1.2 mg/kg OTA group,400 mg/kg Cur group,and 1.2 mg/kg OTA+400 mg/kg Cur group.Each treatment consisted of 3 replicates(180 fish)for 60 d.Results Firstly,we cultured,purified,and identified myoblasts using the tissue block culture method.Through preliminary screening and re-screening of 96 substances,we examined cell proliferation-related indicators such as cell viability and ultimately found that Cur had the best effect.Secondly,Cur could alleviate OTA-inhibited myoblast differentiation and myofibrillar development-related proteins(Myo G and MYHC)in vivo and in vitro and improve the growth performance of grass carp.Then,Cur could also promote the expression of OTA-inhibited protein synthesis-related proteins(S6K1 and TOR),which was related to the activation of the AKT/TOR signaling pathway.Finally,Cur could downregulate the expression of OTA-enhanced protein degradation-related genes(murf1,foxo3a,and ub),which was related to the inhibition of the Fox O3a signaling pathway.Conclusions In summary,our data demonstrated the effectiveness of Cur in alleviating OTA myotoxicity in vivo and in vitro.This study confirms the rapidity,feasibility,and effectiveness of establishing a natural product screening method targeting myoblasts to alleviate fungal toxin toxicity. 展开更多
关键词 CURCUMIN Grass carp Myotoxic Ochratoxin A Protein deposition
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Anti-infective immune functions of type Ⅳ interferon in grass carp(Ctenopharyngodon idella):A novel antibacterial and antiviral interferon in lower vertebrates
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作者 Yuchen Liu Wentao Zhu +3 位作者 Yanqi Zhang Jingjing Zhang Maolin Lv Jianguo Su 《Zoological Research》 SCIE CSCD 2024年第5期972-982,共11页
Type Ⅳ interferon(IFN-υ)is a recently discovered cytokine crucial for host defense against viral infections.However,the role and mechanisms of IFN-υin bacterial infections remain unexplored.This study investigated ... Type Ⅳ interferon(IFN-υ)is a recently discovered cytokine crucial for host defense against viral infections.However,the role and mechanisms of IFN-υin bacterial infections remain unexplored.This study investigated the antibacterial and antiviral functions and mechanisms of grass carp(Ctenopharyngodon idella)IFN-υ(CiIFN-υ)both in vivo and in vitro.The CiIFN-υgene was first identified and characterized in grass carp.Subsequently,the immune expression of CiIFN-υsignificantly increased following bacterial challenge,indicating its response to bacterial infections.The eukaryotic recombinant expression plasmid of CiIFN-υwas then constructed and transfected into fathead minnow(FHM)cells.Supernatants were collected and incubated with four bacterial strains,followed by plate spreading and colony counting.Results indicated that CiIFN-υexhibited more potent antibacterial activity against gram-negative bacteria compared to gram-positive bacteria and aggregated gram-negative bacteria but not gram-positive bacteria.In vivo experiments further confirmed the antibacterial function,showing high survival rates,low tissue edema and damage,reduced tissue bacterial load,and elevated proinflammatory response at the early stages of bacterial infection.In addition,the antiviral function of CiIFN-υwas confirmed through in vitro and in vivo experiments,including crystal violet staining,survival rates,tissue viral burden,and reverse transcription-quantitative real-time polymerase chain reaction(RT-qPCR).This study highlights the antibacterial function and preliminary mechanism of IFN-υ,demonstrating that IFN-υpossesses dual functions against bacterial and viral infections. 展开更多
关键词 Grass carp(Ctenopharyngodon idella) IFN-υ Bactericidal activity Antiviral activity Antimicrobial immunity
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Research Progress on Nutritional Requirements of Carp
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作者 Yina LU 《Asian Agricultural Research》 2024年第1期37-39,43,共4页
Carp is a temperate freshwater fish native to Asia,distributed in all regions of the world except Australia and South America.With the improvement of comprehensive and healthy breeding technology of carp,the unit yiel... Carp is a temperate freshwater fish native to Asia,distributed in all regions of the world except Australia and South America.With the improvement of comprehensive and healthy breeding technology of carp,the unit yield has been greatly increased mainly due to the exten-sive use of compound feed.In this study,the nutritional requirements of carp were summarized from the aspects of protein,amino acids,fat,carbohydrate,calcium and phosphorus,vitamins and taurine.This study provides a certain theoretical reference for scientific formula of carp feed. 展开更多
关键词 CARP Nutritional requirements Foreground
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Enteric Red Mouth disease and its causative bacterium, Yersinia ruckeri, in Indian Major Carps from culture ponds in Andhra Pradesh, India
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作者 Shameem Ummey Sharmila Khan +1 位作者 P.P.N Vijayakumar Adanki Ramya 《Aquaculture and Fisheries》 2021年第3期289-299,共11页
During the present investigation,studies were carried out to investigate the outbreak of Redmouth disease in culture ponds situated at Krishna,West Godavari and East Godavari districts of Andhra Pradesh.Enteric Red Mo... During the present investigation,studies were carried out to investigate the outbreak of Redmouth disease in culture ponds situated at Krishna,West Godavari and East Godavari districts of Andhra Pradesh.Enteric Red Mouth disease or Yersiniosis is a serious infectious bacterial disease,sometimes responsible for causing severe economic loss to fish farming industry.The disease is clinically characterized by symptoms like bleeding at the base of fins,inside and around mouth,bilateral exophthalmia with or without haemorrhage,and per-ocular and peri-oral haemorrhages.In the present study,live or moribund fish showing lesions similar to enteric redmouth disease were collected and the causative agent was isolated by culture techniques.Bacterial identification was carried out by conventional biochemical methods and molecular polymerase chain reaction.DNA extracted from isolated pathogen was subjected to PCR amplification with a pair of Y.ruckeri specific primers.The PCR product was run on 1.5%agarose gel electrophoresis and positive bands with a molecular size of approximately 500bp were detected.It is similar to that given for PCR products with primers specific for Y.ruckeri. 展开更多
关键词 Yersinia ruckeri PCR Enteric Red Mouth Disease Indian Major carps Andhra Pradesh
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Endosymbiotic pathogen-inhibitory gut bacteria in three Indian Major Carps under polyculture system: A step toward making a probiotics consortium 被引量:2
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作者 Koushik Ghosh Anjan Mukherjee +4 位作者 Dipanjan Dutta Sudeshna Banerjee Eva Marie Breines Ellinor Hareide Einar Ringø 《Aquaculture and Fisheries》 2021年第2期192-204,共13页
The gastrointestinal(GI)microbiome in fish plays significant roles in health and disease resistance.This investigation was accomplished to enumerate,characterize and identify the potential probiotic bacteria from thre... The gastrointestinal(GI)microbiome in fish plays significant roles in health and disease resistance.This investigation was accomplished to enumerate,characterize and identify the potential probiotic bacteria from three Indian Major Carps(IMCs),viz.,rohu(Labeo rohita),catla(Catla catla)and mrigal(Cirrhinus mrigala)using culture dependent methods.Altogether,105 pathogen-inhibitory bacteria(out of 1216 isolates)were detected from three IMCs by double layer assay.16S rRNA partial gene sequence analyses and BLAST search in the NCBI GenBank unveiled that 94.29%of the pathogen inhibitory bacteria were bacilli(99 strains)and Bacillus licheniformis by far the most common(28%).The primarily selected 27 pathogen-inhibitory strains(cumulative inhibition score≥13)produced extracellular enzymes,while 15 of them produced all the six exo-enzymes studied(amylase,protease,lipase,cellulase,phytase and xylanase).Gut stability of the strains became apparent by their ability to grow in fish mucus and tolerance to diluted bile-juice.Finally,14 strains were noticed asγ-hemolytic and susceptible to the commonly used antibiotics.Further,intra-peritoneal injection withγ-hemolytic strains did not induce any pathological signs or mortalities in fish,and thus were considered as safe.These 14γ-hemolytic isolates were represented by the genus Bacillus(13)and Stenotrophomonas(1),which might form probiotic consortia for prospective use in carp culture. 展开更多
关键词 CARP Bacillus STENOTROPHOMONAS ANTAGONISM Exoenzymes 16S rRNA
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Enzyme-linked immunosorbent assay of changes in serum levels of growth hormone(cGH)in common carps(Cyprinus carpio) 被引量:1
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作者 WU Gang CHEN LiHua +4 位作者 ZHONG Shan LI Qi SONG ChaoJun JIN BoQuan ZHU ZuoYan 《Science China(Life Sciences)》 SCIE CAS 2008年第2期157-163,共7页
The aim of the present study was to purify the common native carp growth hormone (ncGH), produce monoclonal antibodies (mAbs) to common native carp growth hormone (ncGH), and further enhance the sensitivity of enzyme-... The aim of the present study was to purify the common native carp growth hormone (ncGH), produce monoclonal antibodies (mAbs) to common native carp growth hormone (ncGH), and further enhance the sensitivity of enzyme-linked immunosorbent assays (ELISA) for ncGH. Additionally, we investigated changes in serum ncGH levels in carps raised in different environmental conditions. The recombinant grass carp (Ctenopharyngodon idella) growth hormone was purified and used as antigen to immunize the rabbit. The natural ncGH was isolated from the pituitaries of common carp. SDS-PAGE and Western blot utilizing the polyclonal anti-rgcGH antibody confirmed the purification of ncGH from pituitaries. Purified ncGH was then used as an immunogen in the B lymphocyte hybridoma technique. A total of 14 hybridoma cell lines (FMU-cGH 1-14) were established that were able to stably secrete mAbs against ncGH. Among them, eight clones (FMU-cGH1-6, 12 and 13) were successfully used for Western blot while nine clones (FMU-cGH 1-7, 9 and 10) were used in fluorescent staining and immunohistochemistry. Epitope mapping by competitive ELISA demonstrated that these mAbs recognized five different epitopes. A sensitive sandwich ELISA for detection of ncGH was developed using FMU-cGH12 as the coating mAb and FMU-cGH6 as the enzyme labeled mAb. This detection system was found to be highly stable and sensitive, with detection levels of 70 pg/mL. Additionally, we found that serum ncGH levels in restricted food group and in the net cage group increased 6.9-and 5.8-fold, respectively, when compared to controls, demonstrating differences in the GH stress response in common carp under different living conditions. 展开更多
关键词 common carp growth hormone monoclonal antibodies ELISA STARVATION net cage
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Mannan oligosaccharides alleviate oxidative injury in the head kidney and spleen in grass carp(Ctenopharyngodon idella)via the Nrf2 signaling pathway after Aeromonas hydrophila infection 被引量:1
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作者 Zhiyuan Lu Lin Feng +8 位作者 Weidan Jiang Pei Wu Yang Liu Jun Jiang Shengyao Kuang Ling Tang Shuwei Li Chengbo Zhong Xiaoqiu Zhou 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2023年第4期1744-1758,共15页
Background Mannan oligosaccharides(MOS)are recommended as aquaculture additives owing to their excellent antioxidant properties.In the present study,we examined the effects of dietary MOS on the head kidney and spleen... Background Mannan oligosaccharides(MOS)are recommended as aquaculture additives owing to their excellent antioxidant properties.In the present study,we examined the effects of dietary MOS on the head kidney and spleen of grass carp(Ctenopharyngodon idella)with Aeromonas hydrophila infection.Methods A total of 540 grass carp were used for the study.They were administered six gradient dosages of the MOS diet(0,200,400,600,800,and 1,000 mg/kg)for 60 d.Subsequently,we performed a 14-day Aeromonas hydrophila challenge experiment.The antioxidant capacity of the head kidney and spleen were examined using spectrophotometry,DNA fragmentation,qRT-PCR,and Western blotting.Results After infection with Aeromonas hydrophila,400-600 mg/kg MOS supplementation decreased the levels of reactive oxygen species,protein carbonyl,and malonaldehyde and increased the levels of anti-superoxide anion,antihydroxyl radical,and glutathione in the head kidney and spleen of grass carp.The activities of copper-zinc superoxide dismutase,manganese superoxide dismutase,catalase,glutathione S-transferase,glutathione reductase,and glutathione peroxidase were also enhanced by supplementation with 400-600 mg/kg MOS.Furthermore,the expression of most antioxidant enzymes and their corresponding genes increased significantly with supplementation of 200-800 mg/kg MOS.mRNA and protein levels of nuclear factor erythroid 2-related factor 2 also increased following supplementation with 400-600 mg/kg MOS.In addition,supplementation with 400-600 mg/kg MOS reduced excessive apoptosis by inhibiting the death receptor pathway and mitochondrial pathway processes.Conclusions Based on the quadratic regression analysis of the above biomarkers(reactive oxygen species,malondialdehyde,and protein carbonyl)of oxidative damage in the head kidney and spleen of on-growing grass carp,the recommended MOS supplementation is 575.21,557.58,531.86,597.35,570.16,and 553.80 mg/kg,respectively.Collectively,MOS supplementation could alleviate oxidative injury in the head kidney and spleen of grass carp infected with Aeromonas hydrophila. 展开更多
关键词 ANTIOXIDANT Apoptosis Functional organs Grass carp Mannan oligosaccharides
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Dietary protein levels changed the hardness of muscle by acting on muscle fiber growth and the metabolism of collagen in sub-adult grass carp(Ctenopharyngodon idella) 被引量:1
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作者 Min Dong Lu Zhang +8 位作者 Pei Wu Lin Feng Weidan Jiang Yang Liu Shengyao Kuang Shuwei Li Haifeng Mi Ling Tang Xiaoqiu Zhou 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2023年第2期729-744,共16页
Background:Nutrient regulation has been proven to be an effective way to improve the flesh quality in fish.As a necessary nutrient for fish growth,protein accounts for the highest proportion in the fish diet and is ex... Background:Nutrient regulation has been proven to be an effective way to improve the flesh quality in fish.As a necessary nutrient for fish growth,protein accounts for the highest proportion in the fish diet and is expensive.Although our team found that the effect of protein on the muscle hardness of grass carp was probably related to an increased collagen content,the mechanism for this effect has not been deeply explored.Moreover,few studies have explored the protein requirements of sub-adult grass crap(Ctenopharyngodon idella).Therefore,the effects of different dietary protein levels on the growth performance,nutritional value,muscle hardness,muscle fiber growth,collagen metabolism and related molecule expression in grass carp were investigated.Methods:A total of 450 healthy grass carp(721.16±1.98 g)were selected and assigned randomly to six experimen-tal groups with three replicates each(n=25/replicate),and were fed six diets with 15.91%,19.39%,22.10%,25.59%,28.53%and 31.42%protein for 60 d.Results:Appropriate levels of dietary protein increased the feed intake,percentage weight gain,specific growth rate,body composition,unsaturated fatty acid content in muscle,partial free amino acid content in muscle,and muscle hardness of grass carp.These protein levels also increased the muscle fiber density,the frequency of new muscle fibers,the contents of collagen and IGF-1,and the enzyme activities of prolyl 4-hydroxylases and lysyloxidase,and decreased the activity of matrix metalloproteinase-2.At the molecular level,the optimal dietary protein increased col-lagen type Iα1(Colα1),Colα2,PI3K,Akt,S6K1,La ribonucleoprotein domain family member 6a(LARP6a),TGF-β1,Smad2,Smad4,Smad3,tissue inhibitor of metalloproteinase-2,MyoD,Myf5,MyoG and MyHC relative mRNA levels.The levels of the myostatin-1 and myostatin-2 genes were downregulated,and the protein expression levels of p-Smad2,Smad2,Smad4,p-Akt,Akt,LARP6 and Smad3 were increased.Conclusions:The appropriate levels of dietary protein promoted the growth of sub-adult grass carp and improved muscle hardness by promoting the growth of muscle fibers,improving collagen synthesis and depressing collagen degradation.In addition,the dietary protein requirements of sub-adult grass carp were 26.21%and 24.85%according to the quadratic regression analysis of growth performance(SGR)and the muscle hardness(collagen content),respectively. 展开更多
关键词 Collagen degradation Collagen synthesis Grass carp Muscle fibers Muscle hardness PROTEIN
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水质调控对松浦镜鲤和易捕鲤人工繁殖的影响 被引量:1
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作者 李黎 《黑龙江水产》 2023年第3期194-197,共4页
该试验以松浦镜鲤(songpu mirror carp)和易捕鲤(Easy caught carp)两个育种新品种人工繁殖为依托,通过对两个品种人工孵化过程中孵化环道水的理化因子检测,研究氨氮、溶解氧、氧化还原电位、酸碱度及温度在孵化过程中的变动规律,解决... 该试验以松浦镜鲤(songpu mirror carp)和易捕鲤(Easy caught carp)两个育种新品种人工繁殖为依托,通过对两个品种人工孵化过程中孵化环道水的理化因子检测,研究氨氮、溶解氧、氧化还原电位、酸碱度及温度在孵化过程中的变动规律,解决在人工孵化过程中遇到的水质恶化、死卵、水霉病暴发、孵化率低等实际生产问题。研究表明:在适时合理的水质调控措施下,有助于提高受精卵的孵化效果,死卵和畸形卵数量减少,水质清新良好,水霉病的爆发得以控制,鱼卵的孵化率提高,可供实际生产中参考。 展开更多
关键词 水质调控 人工繁殖 松浦镜鲤(songpu mirror carp) 易捕鲤(Easy caught carp)
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Implications of vitamin D for flesh quality of grass carp(Ctenopharyngodon idella):antioxidant ability,nutritional value,sensory quality,and myofiber characteristics
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作者 Yao Zhang Chaonan Li +9 位作者 Xiaoqiu Zhou Weidan Jiang Pei Wu Yang Liu Hongmei Ren Lu Zhang Haifeng Mi Jiayong Tang Ruinan Zhang Lin Feng 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2023年第6期2596-2613,共18页
Background Muscle represents a unique and complex system with many components and comprises the major edible part of animals.Vitamin D is a critical nutrient for animals and is known to enhance calcium absorption and ... Background Muscle represents a unique and complex system with many components and comprises the major edible part of animals.Vitamin D is a critical nutrient for animals and is known to enhance calcium absorption and immune response.In recent years,dietary vitamin D supplementation in livestock has received increased attention due to biological responses including improving shear force in mammalian meat.However,the vitamin D acquisition and myofiber development processes in fish differ from those in mammals,and the effect of vitamin D on fish flesh quality is poorly understood.Here,the influence of dietary vitamin D on fillet quality,antioxidant ability,and myofiber development was examined in grass carp(Ctenopharyngodon idella).Methods A total of 540 healthy grass carp,with an initial average body weight of 257.24±0.63 g,were allotted in 6 experimental groups with 3 replicates each,and respectively fed corresponding diets with 15.2,364.3,782.5,1,167.9,1,573.8,and 1,980.1 IU/kg vitamin D for 70 d.Results Supplementation with 1,167.9 IU/kg vitamin D significantly improved nutritional value and sensory quality of fillets,enhancing crude protein,free amino acid,lipid,and collagen contents;maintaining an ideal pH;and reduc-ing lactate content,shear force,and cooking loss relative to respective values in the control(15.2 IU/kg)group.Average myofiber diameter and the frequency of myofibers>50μm in diameter increased under supplementation with 782.5–1,167.9 IU/kg vitamin D.Levels of oxidative damage biomarkers decreased,and the expression of antioxi-dant enzymes and nuclear factor erythroid 2-related factor 2 signaling molecules was upregulated in the 1,167.9 IU/kg vitamin D treatment compared to respective values in the control group.Furthermore,vitamin D supplementation activated cell differentiation by enhancing the expression of myogenic regulatory factors and myocyte enhancer factors compared to that in the control group.In addition,supplementation with 1,167.9 IU/kg vitamin D improved protein deposition associated with protein synthesis molecule(target of rapamycin)signaling and vitamin D receptor paralogs,along with inhibition of protein degradation(forkhead box protein 1)signaling.Conclusions Overall,the results demonstrated that vitamin D strengthened antioxidant ability and myofiber devel-opment,thereby enhancing nutritional value and sensory quality of fish flesh.These findings suggest that dietary vitamin D supplementation is conducive to the production of nutrient-rich,high quality aquaculture products. 展开更多
关键词 ANTIOXIDANT Grass carp Myofiber development Nutritional value Sensory quality Vitamin D
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Systematic functional analysis and potential application of a serine protease from cold-adapted Planococcus bacterium
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作者 Weijun Leng Xiaoyun Wu +3 位作者 Xianghui Qi Hongying Liu Li Yuan Ruichang Gao 《Food Science and Human Wellness》 SCIE CSCD 2023年第5期1751-1761,共11页
In this study, a gene encoding serine protease(PmSpr288)from cold-adapted bacterium, namely Planococcus maritimus XJ11, was cloned and overexpressed in Escherichia coli BL21(DE3). Bioinformatics analysis revealed that... In this study, a gene encoding serine protease(PmSpr288)from cold-adapted bacterium, namely Planococcus maritimus XJ11, was cloned and overexpressed in Escherichia coli BL21(DE3). Bioinformatics analysis revealed that PmSpr288 belongs to serine protease S8 superfamily with a classical catalytic triad comprised by the Asp49, His86 and Ser251. Moreover, PmSpr288 was found to be active over broad alkaline pH and low-moderate temperature, and exhibited wide range of protein substrate specificity. In addition, PmSpr288 was able to hydrolyze the meat proteins actin and myosin, and molecular docking results suggested that the crucial interaction between PmSpr288 and actin/myosin complexes was mainly occupied by hydrogen bonds. The muscle protein hydrolysates of silver carp prepared by PmSpr288 was shown to have antioxidant activity via DPPH radical scavenging assay, which presented an IC_(50) valve of 1.309 mg/mL. In conclusion, these characteristics imply that PmSpr288 has potential biotechnological application prospect for the production of bioactive peptides. 展开更多
关键词 PROTEASE Silver carp Protein hydrolysates Molecular docking Bioactive peptides
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