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Effects of rising temperature on growth and energy budget of juvenile Eogammarus possjeticus(Amphipoda:Anisogammaridae)

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Acta Oceanologica Sinica 2021年第9期40卷 82-89页

作者： Suyan Xue Yuze Mao Jiaqi Li jianguang fang Fazhen Zhao Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China Marine Ecology and Environmental Science Laboratory Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

Growth and energy budget of marine amphipod juvenile Eogammarus possjeticus at different temperatures(20℃,24℃,26℃,28℃,30℃,32℃ and 34℃)were investigated in this *** results showed that the cumulative mortality rate increased significantly with rising temperature(p<0.01),and exceeded 50%after 24 h when temperature was above 30℃.With the temperature increasing from 20℃ to 26℃,the ingestion rate and absorption rate increased,but decreased significantly above 28℃(p<0.01),indicating a decline in feeding ability at high *** specific growth rate increased with rising temperature,but decreased significantly(p<0.01)after reaching the maximum value at 24℃.Similarly,the oxygen consumption and ammonia emission rates also showed a trend of first increase and then ***,the O:N ratio decreased first and then increased with rising temperature,indicating that the energy demand of *** juvenile transferred from metabolism of carbohydrate and lipid to *** the energy distribution of amphipods,the proportion of each energy is *** rising temperature,the ratio of the energy deposited for growth accounted for ingested gross energy showing a trend of decrease,while the energy lost to respiration,ammonia excretion,and feces accounted for ingested gross energy being showed a trend of *** seemed that rising temperature increased the metabolism and energy consumption of the amphipods and,meanwhile,decreased the energy used for growth,which may be an important reason for the slow growth and small body size of the amphipods during the summer high-temperature period.

关键词： Eogammarus possjeticus rising temperature growth respiratory metabolism energy budget

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Photosynthetic and metabolic responses of eelgrass Zostera marina L. to short-term high-temperature exposure

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Journal of Oceanology and Limnology 2019年第1期37卷 199-209页

作者： GAO Yaping JIANG Zengjie DU Meirong fang Jinghui JIANG Weiwei fang jianguang Institute of Oceanology Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Sustainable Development of Marine Fisheries Ministry of Agriculture Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Function Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and Technology

In recent years, extreme heat events have occurred worldwide and the ocean temperature has been rising, causing stress on the photosynthesis and growth of seagrass. Metabolomics enables detection of metabolic changes under environmental stress. In this study, the photosynthetic physiology and metabolic changes of the eelgrass Zostera marina L. in response to 48 h exposure to 32°C were investigated. The results showed that high temperature induced signi?cant inhibition of photosynthetic effciency(Δ F/F′ m)(23.9%lower than the control), enhanced respiration(58.3% higher), and decreased carbohydrate decomposition products and tricarboxylic acid(TCA) cycle intermediate products, indicating that the energy supply of the eelgrass may be insuffcient at high temperature. In addition, high temperature decreased stearic acid and linoleic acid in eelgrass, suggesting the composition of the membrane system of eelgrass may change at high temperature and implying that high temperature may cause the membrane system to be unstable.

关键词： high temperature eelgrass photosynthetic response metabolome

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Dynamic Resistance and Energy Absorption of Sandwich Beam via a Micro-Topology Optimization

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Chinese Journal of Mechanical Engineering 2024年第4期37卷 146-162页

作者： Shiqiang Li Yuwei Li Xiaomin Ma jianguang fang Zhifang Liu Zhihua Wang Institute of Applied Mechanics Taiyuan University of TechnologyTaiyuan 030024China Shanxi Key Laboratory of Material Strength and Structural Impact Taiyuan University of TechnologyTaiyuan 030024China School of Civil and Environmental Engineering University of Technology SydneySydneyNSW 2007Australia

The current research of sandwich structures under dynamic loading mainly focus on the response characteristic of *** micro-topology of core layers would sufficiently influence the property of sandwich ***,the micro deformation and topology mechanism of structural deformation and energy absorption are *** this paper,based on the bi-directional evolutionary structural optimization method and periodic base cell(PBC)technology,a topology optimization frame work is proposed to optimize the core layer of sandwich *** objective of the present optimization problem is to maximize shear stiffness of PBC with a volume *** effects of the volume fraction,filter radius,and initial PBC aspect ratio on the micro-topology of the core were *** dynamic response process,core compression,and energy absorption capacity of the sandwich beams under blast impact loading were analyzed by the finite element *** results demonstrated that the overpressure action stage was coupled with the core compression *** the same loading and mass per unit area,the sandwich beam with a 20%volume fraction core layer had the best blast *** filter radius has a slight effect on the shear stiffness and blast resistances of the sandwich *** increasing the filter radius could slightly improve the bending *** changing the initial PBC aspect ratio,there are three ways for PBC evolution:The first is to change the angle between the adjacent bars,the second is to further form holes in the bars,and the third is to combine the first two ***,not all three ways can improve the energy absorption capacity of the *** the aspect ratio of the PBC arbitrarily may lead to worse *** studies are necessary for further detailed *** research proposes a new topology sandwich beam structure by micro-topology optimization,which has sufficient shear *** micro mechanism of structural

关键词： Topology optimization Sandwich beam Impact loading Dynamic resistance Energy absorption Micro mechanism

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Effects of salinity, carbonate alkalinity, and pH on physiological indicators of nutrition transporter for potential habitat restoration of amphipod Eogammarus possjeticus

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Journal of Oceanology and Limnology 2020年第6期38卷 1925-1935页

作者： XUE Suyan MAO Yuze WANG Jinye fang jianguang ZHAO Fazhen Key Laboratory of Sustainable Development of Marine Fisheries Ministry of AgricultureShandong Provincial Key Laboratory of Fishery Resources and Eco-environmentYellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental Science Pilot National Laboratory for Marine Science and TechnologyQingdao 266071China College of Marine Science and Engineering Qingdao Agriculture UniversityQingdao 266109China

The effects of three environmental factors,salinity,carbonate alkalinity,and pH,on the survival,feeding,and respiratory metabolism of Eogammarus possjeticus(Amphipoda:Gammaridae)were investigated *** results show that *** could tolerate a broad salinity *** 24-h lowest median lethal salinity was 2.70,and the highest was *** 24-h median lethal alkalinity and pH were 23.05 mmol/L and 9.91,respectively;both values decreased gradually with *** values of salinity,carbonate alkalinity,and pH resulted in significant differences in the cumulative mortality(P<0.05).The ingestion rate and feed absorption efficiency were significantly affected by the coupling of the three environmental factors(P<0.05).With increases in carbonate alkalinity,salinity,and pH,both ingestion rate and feed absorption efficiency exhibited a downward trend,indicating a decline in feeding ability under high salinity and more alkaline water *** coupling of salinity,carbonate alkalinity,and pH also had a significant effect on respiration and excretion(P<0.05).The oxygen consumption rate increased first and then decreased with increasing carbonate *** the same carbonate alkalinity values,the oxygen consumption rate increased with increasing *** the same carbonate alkalinity and salinity,the oxygen consumption rate initially increased and then decreased with increasing *** O:N ratio first increased and then decreased with increasing carbonate *** carbonate alkalinity was less than 6 mmol/L,the O:N ratio increased with increasing salinity and decreased with increasing *** results demonstrate that changes in salinity,carbonate alkalinity,and pH had a measurable impact on the osmotic pressure equilibrium in *** and affected the energy supply mode(*** of metabolic substrate).

关键词： Eogammarus possjeticus saline and alkaline water survival feeding respiratory metabolism

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Response of phytoplankton to multispecies mariculture:a case study on the carrying capacity of shellfish in the Sanggou Bay in China

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Acta Oceanologica Sinica 2008年第1期27卷 102-112页

作者： GE Changzi fang jianguang SONG Xiefa MAO Yuze YE Naihao Department of Marine Fishery Ocean University of China Qingdao 266003 China Key Laboratory for Sustainable Utilization of Marine Fishery Resource Yellow Sea Fisheries Research Institute Qingdao266071 China

A muhispecies model for shellfish polycuhure in the Sanggou Bay in China used for large-scale long-line cultivation of the Chinese scallop Chlamysfarreri, the Pacific oyster Crassostrea gigas and the kelp Laminaria japonica is presented. The model includes key physical processes which are the transports of matter at the system boundary, and the main biological process that is the primary production and nutrients release from the bottom. By the model, the seasonal fluctuations of phytoplankton biomass and dissolved inorganic nitrogen（DIN） in 1994 are simulated. Furthermore, if the kelp culture scale is kept constant and the Chinese scallop and the Pacific oyster culture scales are adjusted, virtual shellfish farms are funded and responses of phytoplankton to the largescale shellfish culture are simulated. According to these simulated results, the room limitation, and the hypothesis that shellfish will not grow well if the phytoplankton biomass is less than 8.2 mg/m^3 , the expandable multiple of scallop culture k and that of oyster culture y are determined as k = -0.276 5y ＋4.690 5 and 0.133 3k ＋0.006 6y≤0.667 5, where, k （ or y） is equal to 1, the culture scale of scallop （ or oyster） is 8.8 x 109 individuals （or 66 ha, with a density of 59 ind./m^2 ）, and the kelp culture scale is 3 300 ha with a density of 12 ind./m^2.

关键词： multispecies model kelp Chinese scallop Pacific oyster carrying capacity

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Size fraction of phytoplankton and the contribution of natural plankton to the carbon source of Zhikong scallop Chlamys farreri in mariculture ecosystem of the Sanggou Bay

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Acta Oceanologica Sinica 2017年第10期36卷 97-105页

作者： JIANG Zengjie DU Meirong fang Jinghui GAO Yaping LI Jiaqi ZHAO Li fang jianguang Key Laboratory of Sustainable Development of Marine Fisheries of Ministry of Agriculture Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Function Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and Technology Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences

The biomass and size fraction of phytoplankton in terms of chlorophyll a（Chl a） was measured during four cruises conducted in April, July, October 2013 and January 2014 in mariculture area, the Sanggou Bay, *** show that total Chl a levels in the surface seawater of the Sanggou Bay generally range from 0.10 to 20.46μg/L, with an average value of 2.13 μg/L. Nano-phytoplankton was the most important size-fraction and accounted for about 65.1% of total Chl a. In order to evaluate the importance of the ＂protozoan trophic link＂ for energy transfer from the microbial loop to filter-feeding feeders, Zhikong scallop Chlamys farreri was then offered a natural planktonic community as potential prey. Results show that scallops obtained carbon source from natural plankton with the rate of 11 033.05 μg/（g·d）. Protists（nanoflagellates and ciliates） were the dominant source of carbon retained by scallop（48.78%）. The microbial loop provided 58.45% of the carbon source for farmed scallops. These results indicate that the microbial loop represent a valuable trophic resource in mariculture system of the Sanggou Bay.

关键词： phytoplankton picoplankton protist microbial food web Chlamys farreri

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Assessing the effects of oyster/kelp weight ratio on water column properties: an experimental IMTA study at Sanggou Bay, China

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Journal of Oceanology and Limnology 2020年第6期38卷 1914-1924页

作者： fang Jinghui fang jianguang CHEN Qionglin MAO Yuze JIANG Zengjie DU Meirong GAO Yaping LIN Fan Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)/Yellow Sea Fisheries Research InstituteChinese Academy of Fishery SciencesQingdao 266071China Key Laboratory of Marine Biotechnology of Zhejiang Province School of Marine SciencesNingbo UniversityNingbo 315211China

Integrated Multi-Trophic Aquaculture(IMTA)is an effective method for sustainable aquaculture as species from different trophic levels could reduce negative effects from fed species in the environment.A proper proportion of different trophic species in an IMTA system could improve the aquaculture production and environmental *** present,research on the proper proportions for farming species is *** investigated the effects of IMTA modes of oyster(Crassostrea gigas)and kelp(Saccharina japonica)in different weight ratios on water quality and carbonate system in a closed enclosure experiment for three days in the Sanggou Bay in Shandong Province,China,in December *** collocation modes in oyster:kelp weight ratio were tested showing as 24:3,24:2,24:1,16:3,16:2,16:1,8:3,8:2,and 8:*** water parameters were determined at 17:00 on Day 1(D1),and 6:00 and 17:00 on Days 2(D2)and 3(D3).As two-way ANOVA showed,all increased parameters(dissolved oxygen(DO),pH,chl a,the carbonate system and pCO2)were significantly related to oyster-kelp modes,and interaction between modes and time were also significant(P<0.05).On the 3th day,the 8:3 mode was the highest in DO,pH,chl a,CO32-(P<0.05),and dissolved inorganic carbon(DIC),HCO3-,CO2,and pCO2 were the lowest(P<0.05).According to previous references and the results of this study,the appropriate oyster:kelp proportion at the beginning of winter is from 8:2 to 8:*** results of this study may help government to optimize the aquaculture structure of Sanggou Bay.

关键词： Integrated Multi-Trophic Aquaculture(IMTA) Pacific oyster Crassostrea gigas kelp Saccharina japonica

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Applicability of Perinereis aibuhitensis Grube for Fish Waste Removal from Fish Cages in Sanggou Bay,***

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Journal of Ocean University of China 2017年第2期16卷 294-304页

作者： fang Jinghui JIANG Zengjie JANSEN Henrice M. HU Fawen fang jianguang LIU Yi GAO Yaping DU Meirong Key Laboratory for Sustainable Utilization of Marine Fisheries Resources of Ministry of Agriculture Yellow Sea Fisheries Research InstituteQingdao 266071P.R.China Institute of Marine Research Bergen 5817Norway Institute for Marine Resources and Ecosystem Studies Yerseke 4400 ABthe Netherlands Marine Biology Institute of Shandong Province Qingdao 266100P.R.China Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237P.R.China

The present study investigated the applicability of integrated polychaete-fish culture for fish waste removal to offset negative impact induced by organic benthic enrichment.A field study demonstrated that deposition rate was significantly higher underneath the fish farm than that in control *** material settling under the farm was characterized by a high amount of fish feces(45%) and uneaten feed(27%).Both feeding rate(FR) and apparent digestibility rate(ADR) increased with decreasing body weight,as was indicated by significantly a higher rate observed for the groups containing smaller individuals in a lab *** nutrient in fresh deposited material(De) was higher than that in sediments collected under the farm(Se),resulting in lower feces production but higher apparent digestibility rate for the De group as feeding rate was ***,higher nutrient removal efficiency was observed in the De group.A mass balance approach indicated that approximately 400–500 individuals m^(-2) is required for removing all waste materials deposited underneath the fish farm,whereas abundance can be lower(about 300–350 individuals m^(-2)) when only the fish waste needs to be *** results showed that a significant amount of waste had been accumulated in the fish cages in Sanggou *** integration of fish with *** seems promising for preventing organic pollution in the sediment and therefore is an effective strategy for mitigating negative effect of fish *** such integration can become a new IMTA(integrated multi-trophic aquaculture) model in Sanggou Bay.

关键词： polychaete fish cage farming IMTA carbon nitrogen environmental recovery

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Tolerance, Oxygen Consumption and Ammonia Excretion of Ophiopholis sarsii vadicola in Different Temperatures and Salinities

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Journal of Ocean University of China 2015年第3期14卷 549-556页

作者： fang Jinghui ZHANG Jihong JIANG Zengjie ZHAO Xuewei JIANG Xu DU Meirong GAO Yaping fang jianguang Key Laboratory for Sustainable Utilization of Marine Fisheries Resources Ministry of Agriculture Yellow Sea Fisheries Research Institute Zhangzidao Group Co. Ltd.

There are more than 2000 species of brittle stars in the world. For most of them, many scientific questions including basic characteristics of eco-physiology are still unknown. In the present study, Ophiopholis sarsii vadicola acclimated at 15 ℃, salinity 31, were assessed for temperature monia excretion were studied at different temperatures （5, 10, and salinity tolerance. Its oxygen consumption and am- 15, 20, 25℃） and salinities （25, 30, 35）. O. sarsii vadi- cola could tolerate 0-24℃ and no brittle star was dead in the salinity range of 19-48 in the experimental situation. Two-way ANOVA showed that the oxygen consumption and ammonia excretion normalized with both dry mass and wet mass, Q10, which is used to describe the temperature sensitivity of respiration, and moisture content were significantly affected by temperature and salinity, and the combined effects of the two factors were significant. Stepwise multiple regression analysis revealed that logarithmic oxygen consumption and ammonia excretion showed a significant positive relationship with logarithmic temperature and salinity. The logarithmic moisture content of the brittle stars showed an inverse relationship with logarithmic salinity, but a positive relationship with logarithmic temperature. This suggests that the tolerance of temperature and salinity of brittle stars is closely related to their living environment, and that the effects of temperature on oxygen consumption are more significant at higher salinity, and that the ammonia excretion is less affected by salinity at lower temperatures.

关键词： Ophiopholis sarsii vadicola tolerance oxygen consumption ammonia excretion temperature salinity

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Response of Yesso scallop Patinopecten yessoensis to acute temperature challenge: physiological and biochemical parameters

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Journal of Oceanology and Limnology 2019年第1期37卷 321-329页

作者： JIANG Weiwei DU Meirong fang jianguang GAO Yaping MAO Yuze CHEN Qionglin LIN Fan JIANG Zengjie Key Laboratory of Sustainable Development of Marine Fisheries Ministry of Agriculture Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and Technology

Water temperature is generally considered to be a major factor af fecting the physiological and biochemical activities of marine bivalves. Here, the physiological and biochemical responses of Yesso scallop, Patinopecten yessoensis, to acute water temperature changes in summer were studied. Scallops were transferred directly to a lower temperature( T dec treatment)(from 23°C to 15°C) or to a higher temperature( Ti nc treatment)(from 15°C to 23°C) for 72 h, respectively. Results showed that the oxygen consumption and ammonia-N excretion rates of P. yessoensis decreased signi?cantly in the T dec treatment but increased dramatically at 6 h in the Ti nc treatment( P <0.05). In the T dec treatment, hepatopancreas antioxidant enzyme activities, superoxide dismutase(SOD) and catalase(CAT) activities, increased substantially within 72 h( P <0.05). However, a signi?cant decrease in CAT activity was found at 12 h in the Ti nc treatment( P <0.01).A signi?cant enhancement of acid phosphatase(ACP) activity and malondialdehyde(MDA) content was detected when scallops were acutely exposed to a temperature of 15°C. The levels of Cu/Zn-SOD gene expression in their gills up-regulated signi?cantly in response to acute temperature changes( P <0.01). These data suggest that acute temperature change af fects physiological and biochemical functions, and improve our knowledge of P. yessoensis under conditions of thermal stress.

关键词： Patinopecten yessoensis acute water temperature changes physiology biochemical activities

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