检索结果-南通市图书馆

长江下游靖江段沿岸优势鱼类体内微塑料污染研究

在线全文

学校读者我要写书评

暂无评论

淡水渔业 2024年第4期54卷 57-65页

作者：唐振唐文乔张亚郭弘艺上海海洋大学海洋动物系统分类与进化上海高校重点实验室上海201306 水产种质资源发掘与利用省部共建教育部重点实验室上海201306

为了解长江禁渔前长江下游鱼体内微塑料的污染情况,对采自长江靖江沿岸2012、2014、2016和2018年的刀鲚(Coilia nasus)、贝氏■(Hemiculter bleekeri)、似鳊(Pseudobrama simoni)和光泽黄颡鱼(Pelteobagrus nitidus)消化道和鳃部的微塑料检出率、丰度和物理特征作了分析。结果显示:在4种480尾鱼消化道和鳃部内共检出1742个微塑料,平均检出率96.25%、丰度为(3.63±2.12)个/尾,其中光泽黄颡鱼和似鳊体内的微塑料丰度分别为(4.24±2.39)个/尾、(4.04±2.09)个/尾,显著高于刀鲚[(3.23±1.95)个/尾]和贝氏■[(3.02±1.75)个/尾]。4种鱼消化道的微塑料平均丰度[(1.95±1.59)个/尾]显著大于鳃[(1.68±1.38)个/尾],但刀鲚和贝氏■在这两个部位之间的微塑料丰度接近。在检出的4种形状的微塑料中,以碎片状(59.82%)和纤维状(32.55%)占比最高。8种颜色中,以黑色(49.02%)和透明(15.04%)比例较高。粒径方面,以<0.1 mm(27.80%)和0.1~0.5 mm(46.84%)的占比最大。比较发现,鳃部的粒径较大、纤维状比例较高,而消化道的黑色占比更高。4种鱼体内微塑料的平均丰度从2012年的(3.93±2.06)个/尾降低到2018年的(3.32±1.99)个/尾,呈现显著性下降趋势。与长江几个大型湖泊相比,长江靖江段优势鱼类微塑料丰度相对较低,物理特征也有差异,农用薄膜、包装袋、塑料瓶、渔具和衣物等可能是重要来源。

关键词：长江靖江段沿岸鱼类微塑料污染消化道鳃

维普期刊数据库博看期刊

球磨纳米生物质炭在饱和多孔介质中的迁移与滞留机制

在线全文

学校读者我要写书评

暂无评论

土壤 2024年第4期56卷 849-856页

作者：樊建新唐文巧吴兴钰石姣重庆交通大学河海学院重庆400074

利用球磨纳米生物质炭模拟老化产生的纳米生物质炭,通过一维柱迁移试验研究了不同背景溶液离子强度(IS)、pH和流速对球磨纳米生物质炭在饱和多孔石英砂介质中迁移与滞留行为的影响,并运用对流弥散模型拟合穿透与滞留曲线得到沉积速率系... 详细信息

利用球磨纳米生物质炭模拟老化产生的纳米生物质炭,通过一维柱迁移试验研究了不同背景溶液离子强度(IS)、pH和流速对球磨纳米生物质炭在饱和多孔石英砂介质中迁移与滞留行为的影响,并运用对流弥散模型拟合穿透与滞留曲线得到沉积速率系数等运移参数,结合DLVO理论研究影响作用机制。结果表明:背景溶液IS降低,pH和流速升高,球磨纳米生物质炭的迁移率明显提高。这是由于在低IS和高pH条件下,球磨纳米生物质炭和石英砂的电负性增加,从而增强了两者之间的静电斥力,同时球磨纳米生物质炭之间具有更好的分散性,有助于球磨纳米生物质炭的迁移;在高流速条件下,球磨纳米生物质炭在石英砂柱中的滞留时间因为平流扩散而减短,同时水流剪切作用力增大不利于颗粒在石英砂上的吸附,有助于球磨纳米生物质炭的迁移。

关键词：球磨纳米生物质炭柱试验迁移与滞留作用机制 DLVO理论迁移模型

基于鱼类完整性指数的上海黄浦江骨干人工河流水生态系统健康评价

在线全文

学校读者我要写书评

暂无评论

上海海洋大学学报 2024年第1期33卷 99-113页

作者：高敏佳陈振锋张彦彦龚珑张亚唐振赵振官唐文乔上海海洋大学海洋动物系统分类与进化上海高校重点实验室上海201306 上海市生态环境局上海200003 上海海洋大学水产种质资源发掘与利用省部共建教育部重点实验室上海201306

为深入了解上海黄浦江5条骨干人工河流的生态系统现状,采用鱼类生物完整性指数(F-IBI)方法对其水生态系统的健康状况作了评价。2021年6月(夏季)和11月(秋季)租用专业渔船在5条河流共计20个断面采集到鱼类标本10092尾,隶属于8目17科45属6... 详细信息

为深入了解上海黄浦江5条骨干人工河流的生态系统现状,采用鱼类生物完整性指数(F-IBI)方法对其水生态系统的健康状况作了评价。2021年6月(夏季)和11月(秋季)租用专业渔船在5条河流共计20个断面采集到鱼类标本10092尾,隶属于8目17科45属60种。以黄浦江上游为参照点,设置了5大类29个初选指标,然后根据分布范围筛选、判别能力筛选和相关性检验,构建了由8个指标组成的F-IBI评价体系。分析结果表明,金汇港和龙泉港总体处于“好”或“一般”的状态;大治河、川杨河和淀浦河空间差异较大,从“差”到“好”均有。其中夏季有14个采样断面为“一般”,各有3个采样断面为“好”或“差”;秋季有11个采样断面为“一般”,5个采样断面为“好”,4个采样断面为“差”。5条人工河流下游的健康状况普遍好于上游,但总体上与流经上海中心城区的黄浦江自然支流苏州河的健康状况相比较为均一。这些结果为上海黄浦江5条骨干人工河流的环境管理提供了参考资料。

关键词：黄浦江大型人工支流鱼类生物完整性指数水生态系统健康评价

The Signatures of Stable Isotopes δ^(15)N and δ^(13)C in Anadromous and Non-Anadromous Coilia nasus Living in the Yangtze River, and the Adjacent Sea Waters

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2015年第6期14卷 1053-1058页

作者： WANG Lei tang wenqiao DONG Wenxia Laboratory of Fishes Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Ministry of Education of China)Shanghai Ocean University

Stable isotopes are increasingly used to investigate seasonal migrations of aquatic organisms. This study employed stable isotopes (delta C-13 and delta N-15) for Coilia nasus from the lower Yangtze River and the adjacent East China Sea to distinguish different ecotypic groups, ascertain trophic nutrition positions, and reflect environmental influences on C. nasus. delta C-13 signatures of C. nasus sampled from Zhoushan (ZS), Chongming (CM), and Jingjiang (JJ) waters were significantly higher than those from the Poyang Lake (PYL) (P < 0.05). By contrast, delta N-15 signatures of C. nasus in ZS, CM, and JJ groups were significantly lower than those in PYL group (P < 0.05). Basing on delta C-13 and delta N-15 signatures, we could distinguish anadromous (ZS, CM, and JJ) and non-anadromous (PYL) groups. The trophic level (TL) of anadromous C. nasus ranged from 2.90 to 3.04, whereas that of non-anadromous C. nasus was 4.38. C. nasus occupied the middle and top nutrition positions in the marine and Poyang Lake food webs, respectively. C. nasus in Poyang Lake were significantly more enriched in delta N-15 but depleted in delta C-13, suggesting that anthropogenic nutrient inputs and terrigenous organic carbon are important to the Poyang Lake food web. This study is the first to apply delta N-15 and delta C-13 to population assignment studies of C. nasus in the Yangtze River and its affiliated waters. Analysis of stable isotopes (delta N-15 and delta C-13) is shown to be a useful tool for discriminating anadromous and non-anadromous C. nasus.

关键词： Japanese grenadier anchovy delta C-13 delta N-15 Changjiang River Poyang Lake

Radiation dose rate estimates to marine biota resulting from the routine radioactive releases of the nuclear power plants in Daya Bay

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第22期44卷 2063-2067页

作者： wenqiao tang Ziqiang Pan Yihua Xia Xiwen Jiang China Inst Atom Energy Beijing 102413 Peoples R China

Five marine organisms in Daya Bay are selected for estimating the dose rates. Internal exposure and its 5 pathways are also considered. The concentrations of 43 kinds of background and additional radionuclides in seawater are from the survey of background radioactivity and the prediction of routine radioactive releases of the 4 reactors. Point source dose distribution functions are used to estimate the dose rates to various organisms from a and β radiation.

关键词： nuclear power plants routine liquid radioactive releases radiation dose rate marine biota Daya Bay.

Blubber fatty acid compositions in different geographic populations of finless porpoise in Chinese waters:implications for thermal adaptation

在线全文

学校读者我要写书评

暂无评论

Integrative Zoology 2022年第4期17卷 638-655页

作者： Bin tang Ya ZHANG Peijun ZHANG Songhai LI Jinsong ZHENG wenqiao tang Kexiong WANG Ding WANG Yujiang HAO Institute of Hydrobiology Chinese Academy of SciencesWuhanChina University of Chinese Academy of Sciences BeijingChina College of Fisheries and Life Science Shanghai Ocean UniversityShanghaiChina Marine Mammal and Marine Bioacoustics Laboratory Institute of Deep-sea Science and EngineeringChinese Academy of SciencesSanyaChina

The stratification of blubber fatty acids(FAs)is a widely used strategy in marine mammals and can be influenced by many factors,including their diet,environmental temperature,and physiological *** are 3 distinct finless porpoise species/subspecies in Chinese coastal and inland waters in a wide range from 20°N to 40°*** biochemical stratification of the blubbers of finless porpoises in different regions may provide valuable information for understanding their environmental *** FA compositions of 4 geographic populations of finless porpoise(FP)collected from the Bohai Gulf,East China Sea,South China Sea,and Yangtze River were therefore analyzed and *** blubber FA compositions of finless porpoises were dominated by∑MUFAs,followed by∑SFAs and∑PUFAs,and were generally consistent with those of other *** blubber of finless porpoises was significantly stratified with increasing levels of∑MUFAs and decreasing levels of∑SFAs and∑PUFAs from the inner to the outer *** 3 marine populations shared more similarities in their FA compositions and stratifications compared to the freshwater porpoises,particularly regarding the PUFAs in the inner layers,which might have been mainly influenced by the diet compositions of marine and freshwater *** to what was expected,in the 3 marine populations,the SFA and MUFA levels showed opposite correlations(negative and positive,respectively)with habitat temperatures,possibly indicating an adaptation mechanism in finless porpoises characterized by a trade-off between the insulation and fluidity properties of the blubber through the adjustment of the compositions and gradients of MUFAs and SFAs across the blubber depth in response to environmental temperature/latitude changes.

关键词： blubber fatty acids finless porpoise thermal adaptation

Population genetic structure in wild and aquaculture populations of Hemibarbus maculates inferred from microsatellites markers

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Aquaculture and Fisheries 2017年第2期2卷 88-93页

作者： Linlin Li Hungdu Lin wenqiao tang Dong Liu Baolong Bao Jinquan Yang Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources Ministry of EducationShanghai Ocean UniversityShanghai 201306China The Affiliated School of National Tainan First Senior High School Tainan 701TaiwanChina

The objective of this study was to investigate 4 aquaculture populations Shanghai(SH),Hangzhou(HZ),Kaihua(KH)and Xianju(XJ)and one wild population Yingshan(YS)of spotted barbell(Hemibarbus maculates)to assess their genetic diversity level and investigate the genetic structure of the *** dendrogram and STRUCTURE revealed that the populations XJ,KH,and HZ jointly formed one cluster,to which the populations SH and YS were sequentially *** genetic diversity of the cultured populations maintained better,possible due to favourable hatchery conditions that decreased the effect of environmental selection present in wild *** results of the present study will contribute to the management of spotted barbell genetic resources,but also demonstrates how the genetic diversity of freshwater species is vulnerable to human activity.

关键词： Population structure jointly

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国赤刀鱼科鱼类的系统分类

上海海洋大学学报 2022年第1期31卷 61-70页

作者：唐文乔上海海洋大学海洋动物系统分类与进化上海高校重点实验室上海201306 上海海洋大学水产种质资源发掘与利用省部共建教育部重点实验室上海201306

赤刀鱼科(Cepolidae)是鲈形目(Perciformes)之下一类身体侧扁、通体红色的小型穴居性鱼类,幼体阶段有一个上枕骨及鳃盖骨系特别膨大且多棘刺等为特点的特殊发育时期。该科分布于西太平洋、印度洋和东大西洋的热带、亚热带海区,我国已有... 详细信息

赤刀鱼科(Cepolidae)是鲈形目(Perciformes)之下一类身体侧扁、通体红色的小型穴居性鱼类,幼体阶段有一个上枕骨及鳃盖骨系特别膨大且多棘刺等为特点的特殊发育时期。该科分布于西太平洋、印度洋和东大西洋的热带、亚热带海区,我国已有零星记录。详细考查赤刀鱼科研究的历史和现状,介绍早期发育个体及成体基本形态,检测保存于中国主要鱼类研究单位的有关标本,厘定中国赤刀鱼科的种类。依据形态鉴别特征,发现中国赤刀鱼科有3属7种,列出这些种类的学名引证及其可数性状和可量性状,简要描述形态特征和地理分布,编制属、种的分类检索表。

关键词：赤刀鱼科物种厘定分类检索形态鉴别特征中国海域

在线全文

学校读者我要写书评

暂无评论

智能化条件下网络威胁情报分析研究

情报杂志 2023年第3期42卷 17-23,33页

作者：陈明汤文峤中国人民武装警察部队警官学院成都610213 中国人民解放军国防科技大学南京210039

[研究目的]智能化条件下,网络威胁情报分析呈现出数据结构复杂、算法主导、云网支持、数据驱动等特征,准确把握上述特点有助于各界了解智能化条件下网络威胁情报分析的内在机理。[研究方法]运用文献分析法、比较分析法等研究方法,深入... 详细信息

[研究目的]智能化条件下,网络威胁情报分析呈现出数据结构复杂、算法主导、云网支持、数据驱动等特征,准确把握上述特点有助于各界了解智能化条件下网络威胁情报分析的内在机理。[研究方法]运用文献分析法、比较分析法等研究方法,深入思考智能化条件下网络威胁情报分析的特征、面临的主要问题,构建出网络威胁情报分析的模型,并以“震网”病毒为例对模型有效性进行检验,提出具体对策建议。[研究结论]智能化条件下网络威胁情报分析面临的最大挑战是数据挖掘能力的不足,以及由此导致的情报分析结果与人类智能难以深层次的融合。要从理论体系构建、方法手段创新、软(硬)件设施升级等多方面加以完善。

关键词：国家安全网络空间安全人工智能网络威胁情报情报分析模型检测