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Effects of Dietary Vitamin D_(3)on Growth Performance,Immune Status,and Calcium and Phosphorus Metabolism in Litopenaeus vannamei Under Different Salinity Conditions

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Journal of Ocean University of China 2023年第4期22卷 1023-1033页

作者： LIU Miao ZHANG Hui SHAO Rui ZHOU Xueqi ZHOU Qicun Mai Kangsen ai qinghui WAN Min Key Laboratory of Aquaculture Nutrition and Feed Ministry of Agriculture&Key Laboratory of MaricultureMinistry of EducationCollege of FisheriesOcean University of ChinaQingdao 266003China Laboratory of Fish and Shellfish Nutrition School of Marine SciencesNingbo UniversityNingbo 315211China

Vitamin D_(3)(VD_(3)) plays a vital role in various physiological processes in addition to its role in regulating the homeostasis of calcium and *** present study was conducted to investigate the effects of dietary VD_(3) on growth performance,immune status and the metabolism of calcium and phosphorus in Litopenaeus vannamei under the optimal salinity(25)and high salinity(35)***(2.1 g±0.1 g)were fed with experimental diets containing 0,1500,6000 and 12000IUkg^(−1)VD_(3) for 30 days under two salinity conditions *** results showed that the growth performance and intestinal health were reduced,while oxidative stress was induced in the shrimp cultured at salinity 35 compared to those in the shrimp cultured at salinity ***,dietary supplementation of 1500 IU kg^(−1)VD_(3) at salinity 35 promoted the growth performance,improved the intestinal health,and enhanced the antioxidant capacity and non-specific immunity in *** addition,the content of inorganic phosphorus in shrimp serum was affected by dietary VD_(3) independent of *** contrast,the expressions of calcium transport-related genes,including calmodulin and Ca2+-ATPase,were regulated by salinity,instead of dietary VD_(3).In conclusion,an appropriate supplementation of dietary VD_(3) under high-salt condition can promote the growth,alleviate intestinal inflammation,enhance antioxidant capacity and immunity,and contribute to phosphorus metabolism in ***.

关键词： vitamin D_(3) Penaeus vannamei salinity antioxidant capacity immunity metabolism intestinal health

Arginine metabolism and its functions in growth, nutrient utilization, and immunonutrition of fish

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Animal Nutrition 2021年第3期7卷 716-727页

作者： Qingchao Wang Zhen Xu qinghui ai Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt Ministry of EducationCollege of FisheriesHuazhong Agricultural UniversityWuhanChina Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdaoChina Key Laboratory of Aquaculture Nutrition and Feed(Ministry of Agriculture) Ocean University of ChinaQingdaoChina

Fish have limited ability in endogenous biosynthesis of *** is an indispensable amino acid for fish,and the arginine requirement varies with fish species and fish *** studies on fish have demonstrated that arginine influences nutrient metabolism,stimulates insulin release,is involved in nonspecific immune responses and antioxidant responses,and elevates disease ***,arginine can regulate energy homeostasis via modulating the adenosine 5'-monophosphate(AMP)-activated protein kinase(AMPK)pathway,and also regulate protein synthesis via activating the target of rapamycin(TOR)signaling *** present article reviews pertinent knowledge of arginine in fish,including dietary quantitative requirements,endogenous anabolism and catabolism,regulation of the endocrine and metabolic systems,and immune-regulatory functions under pathogenic *** findings showed that further data about the distribution of arginine after intake into specific cells,its sub-cellular sensor to initiate downstream signaling pathways,and its effects on fish mucosal immunity,especially the adaptive immune response against pathogenic infection in different species,are urgently needed.

关键词： Arginine metabolism Arginase Immunonutrition Nitric oxide Target of rapamycin signaling

Dietary Leucine Requirement of Juvenile Japanese Seabass(Lateolabrax Japonicus)

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Journal of Ocean University of China 2015年第1期14卷 121-126页

作者： LI Yan CHENG Zhenyan Mai Kangsen ai qinghui The Key Laboratory of Mariculture (Ministry of Education of China) Ocean University of China

A 56-day feeding trial was conducted to examine the dietary leucine requirement of juvenile Japanese seabass in sea- water floating net cages （1.5 m × 1.5 m × 2.0 m）. Six isonitrogenous （crude protein 40%） and isoenergetic （gross energy 20 kJ g-1） diets were formulated to contain different concentrations of leucine （0.9%, 1.49%, 2.07%, 2.70%, 3.30% and 3.88% of dry matter）. Crys- talline L-amino acids were supplemented to simulate the whole body amino acid pattern of Japanese seabass except for leucine. Three groups （30 fish individuals each, 8.0g±0.20g in initial weight） were fed to apparent satiation at 5：00 and 17：30 every day. During the experimental period, the water temperature ranged from 26 to 32℃ and salinity from 26 to 30, and the dissolved oxygen was maintained at 7mgL-l. The results showed that weight gain （WG）, nitrogen retention （NR）, feed efficiency （FE） and protein efficiency ratio （PER） were significantly increased when dietary leucine was increased from 0.90% to 2.70% of dry matter, and then declined. WG was the highest when fish were fed D4 containing 2.70% of leucine. No significant differences were observed in body composition among dietary treatments （P 〉 0.05）. Considering the change of WG, the optimum dietary leucine requirement of juve- nile Japanese seabass was either 2.39% of dry matter or 5.68% of dietary protein.

关键词： growth leucine requirement Japanese seabass

High-performance flexible semiconductor fibres for multi-scenario communication applications

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Science China Materials 2024年第7期67卷 2363-2364页

作者： qinghui Lin Yang Li Guozhen Shen School of Information Science and Engineering University of JinanJinan 250022China School of Microelectronics Shandong UniversityJinan 250101China School of Integrated Circuits and Electronics Beijing Institute of Technology Beijing 100081China

With the advances in the field of flexible fibre technology in recent years,a variety of flexible fibres with different preparation processes have emerged[1,2].However,most of the flexible fibres in the past have structural breaks,making them unsuitable for long-term use as wearable fabrics[3,4].Glass semiconductors are widely used in thermally stretched fibres due to their advantages such as controllable fluidity,but they suffer from electronic defects compared with crystalline semi conductors in electronic semiconductors such as silicon(Si)and germanium(Ge)[5].Obviously,the semiconductor component in flexible optic fibres is a key component in regulating their mechanical and electrical properties[6].

关键词： wear fibres fibre

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Dietary Protein Requirement of Juvenile Turbot(Scophthalmus maximus Linnaeus)

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Journal of Ocean University of China 2015年第2期14卷 325-328页

作者： LIU Xingwang Mai Kangsen LIUFU Zhiguo ai qinghui Key Laboratory of Nutrition and Feed of Department of Agriculture of China Ocean University of China Guangdong Evergreen Feed Industrial Co. Ltd.

The dietary protein requirement of juvenile turbot(initial average weight, 38.2 g ± 0.1 g) reared indoor in aerated aquaria was determined in this study. Five energy equal experimental diets were formulated with fish meal as protein source, which contained different concentrations of protein(47.2%, 51.0%, 54.6%, 59.3% and 63.6% of dry diet). Three groups of fish with 18 individuals in each, were cultured in 300-L tanks and fed twice a day for 8 weeks. During culture, temperature was controlled between 15.0 and 18.0℃, salinity was controlled between 28.5 and 32.0, acidity was controlled between p H7.8 and p H8.5, and ammonia nitrogen was maintained below 0.03 mg L-1 and dissolved oxygen was maintained about 7 mg L-1. Results showed that the growth of fish was significantly affected by dietary protein content(P aining 63.6% protein showed the highest SGR while those fed the diet containing 59.3% protein showed the highest feed efficiency rate. No significant difference of feed intake and protein efficiency ratio was found among experimental diets(P > 0.05). Broken-line regression analysis of SGR showed that the optimal dietary protein requirement of turbot was about 57.0%.

关键词： turbot Scophthalmus maximus protein requirement feed nutrition

A review on current development of thermophotovoltaic technology in heat recovery

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International Journal of Extreme Manufacturing 2024年第2期6卷 297-323页

作者： Shuni Chen Yanming Guo qinghui Pan Yong Shuai Ministry of Industry and Information Technology Key Laboratory of Aerospace Thermophysics School of Energy Science and EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China

The burning of fossil fuels in industry results in significant carbon emissions,and the heat generated is often not fully *** high-temperature industries,thermophotovoltaics(TPVs)is an effective method for waste heat *** review covers two aspects of high-efficiency TPV systems and industrial waste heat *** the system level,representative results of TPV complete the systems,while selective emitters and photovoltaic cells in the last decade are *** key points of components to improve the energy conversion efficiency are further analyzed,and the related micro/nano-fabrication methods are *** the application level,the feasibility of TPV applications in high-temperature industries is shown from the world waste heat utilization *** potential of TPV in waste heat recovery and carbon neutrality is illustrated with the steel industry as an example.

关键词： thermophotovoltaic waste heat recovery micro/nano-fabrication carbon neutrality

Effects of Dietary Soy Isoflavones on Feed Intake,Growth Performance and Digestibility in Juvenile Japanese Flounder(Paralichthys olivaceus)

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Journal of Ocean University of China 2012年第4期11卷 511-516页

作者： Mai Kangsen ZHANG Yanjiao CHEN Wei XU Wei ai qinghui ZHANG Wenbing Key Laboratory of Aquaculture Nutrition and Feed Ministry of Agricultureand the Key Laboratory of MaricultureMinistry of EducationOcean University of ChinaQingdao 266003P.R.China

An 8-week feeding trial was conducted to investigate the effects of dietary soy isoflavones on feeding intake,growth performance,and digestion of juvenile Japanese flounder(Paralichthys olivaceus).Four isonitrogenous(49% crude protein) and isoenergetic(20.1 MJ kg-1) diets were formulated to contain four graded levels of soy isoflavones,namely,0,1,4 and 8 g soy isoflavones in 1 kg of *** diet was randomly fed to triplicate tanks of fish(Initial average weight:2.58 g ± 0.01 g),and each tank was stocked with 35 *** significant difference was observed among diets with levels of 0,1 and 4 g kg-1 soy isoflavones in feed intake,weight gain,feed efficiency ratio(FER),proximate composition of fish whole body and apparent digestibility coefficients(ADC) of nutrients and energy(P>0.05).However,high dietary soy isoflavones level(8 g kg-1) significantly depressed weight gain,FER,whole-body crude lipid content of fish and ADC of nutrients(P<0.05).These results indicate that high level of dietary soy isoflavones(above 4 g kg-1) significantly depresses growth responses and FER of Japanese ***,as the content of soy isoflavones in soybean meal is around 1 to 3 g kg-1,the adverse effects might be neglected when soybean products are used as a fish feed ingredient.

关键词： soy isoflavones feed intake digestibility growth Japanese flounder

Effects of Brown Fish Meal Replacement with Fermented Soybean Meal on Growth Performance, Feed Efficiency and Enzyme Activities of Chinese Soft-shelled Turtle, Pelodiscus sinensis

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Journal of Ocean University of China 2012年第2期11卷 227-235页

作者： ZOU Yurong ai qinghui Mai Kangsen ZHANG Wenbing ZHANG Yanjiao XU Wei The Key Laboratory of Mariculture Ministry of EducationOcean University of ChinaQingdao 266003P.R.China

A 120-day feeding experiment was conducted to investigate the effects of partial replacement of brown fish meal (BFM) by fermented soybean meal (FSBM) in diets of Chinese soft-shelled turtle (Pelodiscus sinensis). The turtles (initial mean body weight, (115.52 ± 1.05) g) were fed with three experimental diets, in which 0%, 4.72% and 9.44% BFM protein was replaced by 0%, 3% and 6% FSBM, respectively. Results showed that the feeding rate (FR), specific growth rate (SGR) and feed efficiency ratio (FER) of turtles fed with the diet containing 3% FSBM were not significantly different from the control group (0% FSBM) (P > 0.05). However, FR, SGR and FER of turtles fed with the diet containing 6% FSBM were significantly lower than those of the control group (P 0.05). However, the uric acid concentration in turtles fed with the diet containing 3% or 6% FSBM was significantly lower than that in the control group (P 0.05). The results suggested that FSBM could replace 4.72% BFM protein in turtle diets without exerting adverse effects on turtle growth, feed utilization and measured immune parameters.

关键词： Chinese soft-shelled turtle Pelodiscus sinensis brown fish meal replacement fermented soybean meal

借助新标记批量测定群养大黄鱼个体的饲料效率

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集美大学学报（自然科学版） 2024年第4期29卷 289-300页

作者：潘育军傅苒馨王公嗣张森朱星丞李晓彤艾庆辉张立宁任鹏王志勇集美大学水产学院福建厦门361021 农业农村部东海海水健康养殖重点实验室福建厦门361021 中国海洋大学水产学院山东青岛266003 浙江省海洋水产养殖研究所浙江温州325005

设计制作一种新型体表标签,标记了770尾18月龄大黄鱼,在室内进行28 d以植物蛋白源为主的无鱼粉配合饲料饲养实验,借助视频记录观察摄食情况,获得了210尾大黄鱼的完整摄食量和饲料效率测定数据。结果显示,大黄鱼个体间的摄食情况和饲料... 详细信息

设计制作一种新型体表标签,标记了770尾18月龄大黄鱼,在室内进行28 d以植物蛋白源为主的无鱼粉配合饲料饲养实验,借助视频记录观察摄食情况,获得了210尾大黄鱼的完整摄食量和饲料效率测定数据。结果显示,大黄鱼个体间的摄食情况和饲料效率都差异巨大。实验期间有的个体摄食活跃,最高摄食饲料量达到409颗(颗粒均重0.2627 g),增重显著,增重率达43.77%;有的个体则很少摄食、甚至完全没有摄食,体重出现负生长,减重最多的达30.3%;有的个体在初始体重、摄食量均相近的情况下,饲料效率、增重率以及特定生长率却存在极显著差异(P<0.01),在体重正增长的个体中,饲料效率最高的达0.827(饲料系数1.21),最低的只有0.008(饲料系数128.73)。这些结果提示大黄鱼对无鱼粉饲料的适应性与饲料效率都有很大的遗传改良潜力。

关键词：新标记大黄鱼无鱼粉配合饲料个体摄食量饲料效率适应性差异