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Growth and Distribution of Amphioctopus fangsiao(d'Orbigny, 1839–1841) in Haizhou Bay, Yellow Sea

Journal of Ocean University of China 2020年第5期19卷 1125-1132页

作者： PANG Yumeng tian yongjun FU Caihong REN Yiping WAN Rong Fisheries College Ocean University of ChinaQingdao 266003China Frontiers Science Center for Deep Ocean Multispheres and Earth System(FDOMES) Ocean University of ChinaQingdao 266100China Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Fisheries and Oceans Canada Pacific Biological StationNanaimoBritish Columbia V9T 6N7Canada College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China

Octopus fisheries have prospered in many areas of the world ocean over the last six decades. Despite degradation and overexploitation of Chinese coastal ecosystems, octopus has become a stable Chinese domestic fishery species. Among the octopus species in the Bohai and Yellow, East and South China Seas, Amphioctopus fangsiao(d'Orbigny [in Férussac & d'Orbigny], 1839–1841) plays an increasingly important role both economically and ecologically. However, no systematic research has been conducted on its biology and population dynamics in the China Seas. In this study, we characterized the growth and distribution of A. fangsiao in Haizhou Bay, Yellow Sea based on four years of trawl survey data. As the results, A. fangsiao is characterized by allometric growth and an overall sex ratio of 0.97 with a slight male bias. Small octopus can be observed through a whole year, suggesting that A. fangsiao may have an extended or continuous spawning season. A. fangsiao may migrate short distances along with seasonal changes and coastal currents, considering they overwinter in the offshore water and spawn in the inshore water. In addition to fishing pressure, annual variations in the population structure and biomass appeared to be influenced by ambient water temperature. These results provide basic biological information for a better understanding of the population dynamics and the ecological importance of A. fangsiao.

关键词： Amphioctopus fangsiao cephalopod Haizhou Bay growth spatial distribution

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Using statolith shape analysis to identify fi ve commercial Loliginidae squid species in Chinese waters

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Journal of Oceanology and Limnology 2021年第3期39卷 1160-1167页

作者： Jianzhong GUO Dan LIU Chi ZHANG yongjun tian Zhixin LI Fisheries College Ocean University of ChinaQingdao 266003China Frontiers Science Center for Deep Ocean Multispheres and Earth System(FDOMES) Ocean University of ChinaQingdao 266100China Laboratory for Marine Fisheries Science and Food Production Processes Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

Identification of squids in the family Loliginidae is a time-consuming exercise because of the highly overlapping distributions of species and their overall similarity(fin shape and size,sucker ring dentition,and color).Identifying squid based on statolith morphology is considered more accurate than identifying species based on beaks or gladius *** report and compare the statolith shape offive commercially Loliginidae squid(Uroteuthis(Photololigo)duvaucelii,***,***,Loliolus beka,***)to determine how well these structures discriminate *** on statolith morphology,variation in the lateral and dorsal domes enables an 84.8%success rate at classifying *** factors correlate with statolith shape,and for vertically migrating squid,statolith relative size decreases with increased depth of *** morphology can be used to effectively and accurately identify species of Loliginidae squid occurring in Chinese waters,and may prove valuable for identifying and managing squid resources.

关键词： statolith shape analysis Loliginidae squid fishery management Chinese waters

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Early life history traits of chub mackerel Scomber japonicus in the Oyashio water revealed by otolith microstructure

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Journal of Oceanology and Limnology 2023年第6期41卷 2444-2450页

作者： Xiaolu LI Chi ZHANG yongjun tian Longshan LIN Shigang LIU Research Centre for Deep Sea and Polar Fisheries and Key Laboratory of MaricultureMinisty of EducationOcean University of ChinaQingdao 266100China Frontiers Science Center for Deep Ocean Multispheres and Earth System(FDOMES) Ocean University of ChinaQingdao 266100China Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361000China

Information on survival and growth during the early life stage is essential to understand the mechanism of interannual variations in fish *** mackerel Scomber japonicus is a commercially important pelagic fish widely distributed in the northwestern *** catch showed large fluctuations with changes in distribution and migration under climate change and strong *** determined the hatch dates and growth rates of young-of-the-year of chub mackerel through otolith microstructure using samples collected in the Oyashio water in autumn *** show that the ages of young chub mackerel ranged between 120 and 180 d,and the estimated hatch date lasted from midJanuary to late May with a peak from mid-March to *** otolith daily increment width during the early life stages(from hatching to 25 d)showed an increasing *** mackerel grows slowly in the first 10 d,and then grows faster during the 10thto *** groups with dissimilar growth histories and migration routes were identified using unsupervised random forest clustering analysis,but all eventually converge on the same nursery *** faster growth of young-of-the-year chub mackerel leads to better recruitment due to the hypothesis of growth-dependent *** chub mackerels hatched in March and April,the spawning period is longer and earlier,which could lead to strong year *** findings on population composition and life history traits of young-of-the-year of chub mackerel provide valuable information on its recruitment processes during the period of stock recovery.

关键词： Scomber japonicus otolith microstructure growth history unsupervised random forest clustering recruitment

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Otolith Shape Analysis as a Tool to Identify Two Pacific Saury(Cololabis saira) Groups from a Mixed Stock in the High-Seas Fishing Ground

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Journal of Ocean University of China 2021年第2期20卷 402-408页

作者： LI Wenjia ZHANG Chi tian yongjun LIU Yang LIU Shigang tian Hao CAO Chang College of Fisheries Ocean University of ChinaQingdao 266003China Frontiers Science Center for Deep Ocean Multispheres and Earth System(FDOMES) Ocean University of ChinaQingdao 266100China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and TechnologyQingdao 266237China Marine Biology and Ecology Third Institute of OceanographyMinistry of Natural ResourcesXiamen 361005China

The Pacific saury Cololabis saira is a commercially important pelagic species with wide distribution in the North Pacific Ocean. Previous studies identified two geographical groups by comparing the radius of otolith annual rings(ROA) of the fish collected during the pre-fishing season. Moreover, understanding the group composition in the mixed catch from the fishing ground is essential for sustainable exploitation of this species. Using samples collected during the fishing season(July–November) from 2016 to 2018, the potential of applying otolith shape analysis as a tool to identify these two mixed groups was tested in this research. Two otolith morphotypes that belong to the eastern group and western group were identified by K-means cluster analysis using Fourier coefficients and ROA. The high classification success of random forest further confirmed the effectiveness of otolith shape analysis. The western group accounted for the majority of catch in July and August at 160?E. With the passing of sampling time and fishing fleets moving westward, the proportion of eastern group gradually increased and finally reached more than 60% of the whole catch in November at 150°E. This result suggests that the eastern and western groups are well mixed during spawning migration. In addition, the temporal and spatial dynamics of their catch composition provide information for their migration route. This study is helpful for improving fisheries management and understanding the short-term stock fluctuation of Pacific saury.

关键词： Pacific saury otolith shape analysis geographical group radius of otolith annual ring

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蓝宝石玻璃超声振动辅助磨削试验研究

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航空制造技术 2024年第15期67卷 102-108页

作者：靳刚李文硕刘浩肖福源李占杰田永军天津职业技术师范大学天津市高速切削与精密加工重点实验室天津300222

为了探究烧结磨头不同磨头参数和磨削参数对蓝宝石玻璃磨削特性的影响,综合考虑了磨头粒度号、主轴转速、进给速度、磨削深度等因素,设计并开展了非超声和超声振动辅助磨削加工试验,研究了上述因素对蓝宝石磨削表面粗糙度、表面形貌及... 详细信息

为了探究烧结磨头不同磨头参数和磨削参数对蓝宝石玻璃磨削特性的影响,综合考虑了磨头粒度号、主轴转速、进给速度、磨削深度等因素,设计并开展了非超声和超声振动辅助磨削加工试验,研究了上述因素对蓝宝石磨削表面粗糙度、表面形貌及磨削力的影响。结果表明,超声和非超声磨削工况中,磨头粒度号增大对磨削力和表面粗糙度的影响整体均呈现先增大后减小的趋势。不同磨头粒度号工况下的超声磨削力和表面粗糙度普遍小于非超声结果,磨削力最大降幅为27.2%,表面粗糙度最大降幅为18.6%;采用粒度号200/230#的磨头进行磨削,可获得相对较小的切削力和表面粗糙度,是研究工况下的最佳粒度号,而140/170#的使用效果最差。相比于非超声磨削,超声可在所选的主轴转速、进给速度和磨削深度条件下实现磨削力和表面粗糙度不同程度的降低,在小主轴转速和小磨削深度工况下,超声磨削对蓝宝石表面质量的改善作用更显著。

关键词：超声加工磨削加工蓝宝石玻璃表面粗糙度磨削力

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Tunable electrical properties of C_(60)·m-xylene and the formation of semiconducting ordered amorphous carbon clusters under pressure

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Nano Research 2022年第4期15卷 3788-3793页

作者： Zhongyan Wu Guoying Gao Jinbo Zhang Alexander Soldatov Jaeyong KimLin Wang yongjun tian Department of Physics Institute for High Pressure ResearchHanyang UniversitySeoul 04763Republic of Korea Center for High Pressure Science(CHiPS) State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China College of Physical Science and Technology Yangzhou UniversityYangzhou 225002China

Ordered amorphous carbon clusters(OACC)transformed from m-xylene solvated C_(60)(C_(60)·m-xylene)are known as the first crystalline material constructed from amorphous building blocks and have attracted a lot of *** formation mechanism and physical properties of this material are of great importance for the design of more materials with such structural *** this article,the transport and structural properties of C_(60)·m-xylene are systematically investigated under pressure using impedance spectroscopy,four-probe resistance measurements,and Raman *** is found that C_(60)·mxylene is an insulator at ambient *** resistance decreases sharply starting at the pressure around 8 GPa due to the pressure-induced dimerization of C_(60)verified by the Raman *** presence of solvent hinders further polymerization of C_(60)under higher *** temperature-dependence of resistance exhibits a semiconducting characteristic at>8-26.9 GPa,and is well described by Mott's three-dimensional variable-range hopping model(3D-VRH),indicating an insulating-tosemiconducting transition accompanied with pressure-induced *** resistance and hopping energy are both found to decrease monotonically with pressure and reach the minimum near 24 *** the pressure,resistance and hopping energy values start to rise,suggesting a transition to another semiconducting state,which is attributed to the pressure-induced formation of *** conductivity shows a large hysteresis during decompression from higher than 24 GPa,confirming a different transport behavior of the sample with retained fullerenes versus *** findings of our study suggest that the transport property of fullerene is tunable by introducing solvates and further enhance our understanding of the OACC.

关键词： fullerene solvate high pressure electrical transport dimerization insulating-semiconducting transition

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Stock Structure Analysis of the Japanese Spanish Mackerel Scomberomorus niphonius(Cuvier, 1832) Along the China Coast Based on Truss Network

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Journal of Ocean University of China 2020年第2期19卷 446-452页

作者： JIANG Yiqian ZHANG Chi YE Zhenjiang XU Binduo tian yongjun WATANABE Yoshiro College of Fisheries Ocean University of ChinaQingdao 266003China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and TechnologyQingdao 266237China Atmosphere and Ocean Research Institute University of Tokyo5-1-5 KashiwanohaKashiwaChiba277-8564Japan

The Japanese Spanish mackerel Scomberomorus niphonius(Cuvier,1832)is widely distributed in the subtropical and temperate waters of the northwestern Pacific Ocean,supporting one of the most important commercial fisheries in ***,ignoring the potential population structure changes induced by fishing pressure and climate change may undermine the population stability under the current management *** this study,the population structure of the Japanese Spanish mackerel was investigated based on a morphometric truss network system.A total of 534 individuals were randomly collected from commercial gill nets spanning eight major spawning grounds in the Bohai,Yellow,and East China Seas during the peak spawning seasons respectively.A total of 17 measurements(including eye diameter)were conducted in each specimen and subjected to principal component analysis(PCA)and discriminant function analysis(DFA).The results of PCA indicated that the first two factors cumulatively caused 78.38%of the total morphometric variation and observable differences,primarily fin the caudal and trunk *** results of DFA revealed that the eight spawning groups can be divided into three stocks,i.e.,southern,middle,and northern stocks,with 68.7%of total *** contrast to previous studies,the spawning groups of the Japanese Spanish mackerel demonstrated a tendency to disperse to northern *** conclusion,this study found that to maintain the stability of the population structure and the total production of Japanese Spanish mackerel ***(Cuvier,1832),a newly revised management method should be developed and implemented.

关键词： Japanese Spanish mackerel population structure truss morphometry management framework

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气候变化背景下南极渔业资源的保护与可持续利用

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中国海洋大学学报（自然科学版） 2024年第10期54卷 29-50页

作者：田永军刘纯琳赵玉毅李建超刘阳孙鹏叶振江中国海洋大学深远海与极地渔业研究中心山东青岛266003

南极和南大洋在全球生态系统中承担着渔业资源开发和生物多样性维护等重要功能,但由于其独特的地理条件,导致其相关研究数据短缺,尚未全面、准确地获取南极渔业生物对气候变化响应模式及对生态系统反馈作用的信息,不同区域生物所展现出... 详细信息

南极和南大洋在全球生态系统中承担着渔业资源开发和生物多样性维护等重要功能,但由于其独特的地理条件,导致其相关研究数据短缺,尚未全面、准确地获取南极渔业生物对气候变化响应模式及对生态系统反馈作用的信息,不同区域生物所展现出的复杂性也增加了极地生物资源研究的难度。过去的捕捞使南极海洋哺乳类和一些重要的鱼类种群资源严重受损,在未来气候变化和人类活动多重压力胁迫下,南极生物资源的保护和合理利用变得尤为重要。本文针对南极气候和环境的变化特征以及渔业生物研究现状,汇总了近几十年南极渔业资源的开发利用状况和最新的资源变化信息,以期为南极渔业资源保护与可持续利用提供参考。

关键词：气候变化海冰南极磷虾南极鱼类海洋哺乳类资源动态生态响应

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Intersectional nanotwinned diamond-the hardest polycrystalline diamond by design

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npj Computational Materials 2020年第1期6卷 653-659页

作者： Jianwei Xiao Bin Wen Bo Xu Xiangyi Zhang Yanbin Wang yongjun tian Center for High Pressure Science State Key Laboratory of Metastable Materials Science and TechnologyYanshan University066004 QinhuangdaoChina Center for Advanced Radiation Sources University of ChicagoChicagoIL 60439USA

The hardness of nanotwinned diamond(nt-diamond)is reported to be more than twice that of the natural diamond,thanks to the fine spaces between twin boundaries(TBs),which block dislocation propagation during *** this work,we explore the effects of additional TBs in nt-diamond using molecular dynamics(MD)calculations and introduce a novel intersectional nanotwinned diamond(int-diamond)template for future laboratory *** hardness of this int-diamond is predicted by first analyzing individual dislocation slip modes in twinned grains and then calculating the bulk properties based on the Sachs *** we show that the hardness of the int-diamond is much higher than that of *** hardening mechanism of intdiamond is attributed to the increased critical resolved shear stress due to the presence of intersectional TBs in nt-diamond;this result is further verified by MD *** work provides a new strategy for designing new super-hard materials in experiments.

关键词： dislocation intersection diamond

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Design of a Class of New sp^(2)-sp^(3)Carbons Constructed by Graphite and Diamond Building Blocks

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Chinese Physics Letters 2021年第2期38卷 112-117页

作者： Kun Luo Bing Liu Lei Sun Zhisheng Zhao yongjun tian Center for High Pressure Science(CHiPS) State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China

The sp^(2)–sp^(3)-hybridized carbon allotropes with the advantage of two hybrid structures possess rich and fascinating electronic and mechanical properties and they have received long-standing *** design a class of versatile sp^(2)–sp^(3)carbons composed of graphite and diamond structural units with variable *** class of sp^(2)–sp^(3)carbons is energetically more favorable than graphite under high pressure,and their mechanical and dynamical stabilities are further confirmed at ambient *** calculations of band structure and mechanical properties indicate that this class of sp^(2)–sp^(3)carbons not only exhibits peculiar electronic characteristics adjusted from semiconducting to metallic nature but also presents excellent mechanical characteristics,such as superhigh hardness and high *** sp^(2)–sp^(3)carbons have desirable properties across a broad range of potential applications.

关键词： ductility Diamond versatile

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