海南岛海鱼寄生复殖吸虫补遗     

申纪伟  李笑红 《海洋科学集刊》2000,(42):153-162

1990年作者《海南岛海鱼寄生复殖吸虫》一书正式出版,同年秋季(10-11月)及1992年春季(3-4月),作者又先后两次赴海南岛进行海鱼吸虫采集,取得标本经整理鉴定共有26种系原书中未曾记载者,其中有4种为新种。现将新种描述于后,并附新记录名录。文中测量单位均为mm,卵子为μm。模式标本保存在中国科学院海洋研究所。  相似文献   

厦门地区杂色花蛤的病毒观察与检测   总被引：1，自引：0，他引：1  

沈明山  罗文新  陈晋安  宋思扬  苏文金 《海洋通报》2000,19(1):93-96

在厦门海区对虾养殖内外环境中,电镜观察发现了杂色花蛤肝胰腺的一种杆状病毒和两种球状病毒.杆状病毒大小为(85～90)nm×(240～264)nm,有包膜,存在于细胞核中,细胞质可见.一种球状病毒直径为70～80nm,有包膜,存在于细胞质中.另一种球状病毒直径为95～120nm,有包膜,存在于细胞核中.用免疫酶组织化学法检测表明,杂色花蛤所带杆状病毒与BMNV有抗原性正相关,其检出率随季节变化,暗示自然生长且感染病毒的杂色花蛤可能是日本对虾杆状病毒病的传染源.  相似文献   

对地勘单位贯彻ISO9000《质量管理和质量保证》系列标准的几点认识     

沈小荣 《青海国土经略》2000,(1)

ISO9000系列标准是一套国际统一的质量管理标准,应用的主体内容是质量管理模式(质量体系)的建立与运行。其对地勘单位走向市场,到社会投标、承揽地勘项目,保证地勘工作成果质量,提高单位在地质市场中的信誉度具有十分重要的意义。  相似文献   

土星卫星运动的现代理论和CCD观测定标归算   总被引：1，自引：0，他引：1  

沈凯先  乔荣川  刘建荣 《天文学进展》2001,19(2):296-300

在目前土卫CCD观测中，采用亮卫星的理论值定标的方法已被广泛采用，然面如何尽可能减小理论引入的误差对定标的影响仍是一个有待研究的问题，在最新研究中，采用3000多个最新的CCD观测对4个土卫现代理论作实算分析和比较，并由对归算结果的初步分析得出一些有价值的结论。  相似文献   

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谭凯  沈强  乔学军  杨少敏 《大地测量与地球动力学》2010,30(2):14-18

??GPS?????????ALOS PALSAR??????????Mw7.9????InSAR????α????????У??????????????????InSAR LOS???????ж??????????????????????????????????????????????????????????????λ???????????????????????????????????????????GPS???У????InSAR????α???????????????????α??????????InSAR?α??????5cm??  相似文献   

�봨8.0������ͬ���������α�ЧӦģ��   总被引：7，自引：4，他引：7  

申重阳  李辉  谈洪波 《大地测量与地球动力学》2008,28(5):6-12

???????λ??????????е???????????????????Ms8.0???????????????????仯?????????????????????λ????????????????????????α?仯?????????????????????????????????????????仯????,????????????????????????????????????α?????????????????????????????仯?????10??10 ^-8 ms ^-2???￡??????????仯??????????50??10 ^-8 ms ^-2?????????????????????????  相似文献   

双棘黄姑鱼血清性类固醇激素的周年变化   总被引：1，自引：0，他引：1  

沈卓坤  郑剑辉  陈怀定  赵会宏 《广东海洋大学学报》2007,27(3):16-19

采用放射免疫法(RIA)测定双棘黄姑鱼(Nibea diacanthus)血清性类固醇激素的周年变化。结果表明:雌鱼血清雌二醇(Estadiol-17β)浓度一年出现两次峰值,均在成熟产卵前一个月,即4月[(338±59)pg/mL]和9月[(296±48)pg/mL];血清睾酮(T)浓度在卵黄发生期急剧上升,并在卵巢成熟期达到最高值,分别是5月(2.506±0.262 ng/mL)和10月份(2.268±0.243 ng/mL),分别在血清雌二醇浓度两次峰值出现1个月之后,因此,雌鱼的血清雌二醇浓度和血清睾酮浓度均与性腺发育相关。雄鱼血清睾酮浓度的两次峰值均出现在性腺已发育成熟的5月份(2.307±0.792 ng/mL)和10月份(2.286±0.607 ng/mL),与性腺发育有明显的相关性;而血清雌二醇浓度全年维持在一个相对稳定的水平,与雄性性腺发育相关性不明显。  相似文献   

Assessment of point and nonpoint sources pollution in Songhua River Basin,Northeast China by using revised water quality model   总被引：3，自引：1，他引：3  

Yuhong Yang  Baixing Yan  Wanbin Shen 《中国地理科学(英文版)》2010,20(1):30-36

Individual participation of pollutants in the pollution load should be estimated even if roughly for the appropriate environmental management of a river basin. It is difficult to identify the sources and to quantify the load, especially in modeling nonpoint source. In this study a revised model was established by integrating point and nonpoint sources into one-dimensional Streeter-Phelps (S-P) model on the basis of real-time hydrologic data and surface water quality monitoring data in the Jilin Reach of the Songhua River Basin. Chemical oxygen demand (COD) and ammonia nitrogen (NH_3-N) loads were estimated. Results showed that COD loads of point source and nonpoint source were 134 958 t/yr and 86 209 t/yr, accounting for 61.02% and 38.98% of total loads, respectively. NH_3-N loads of point source and nonpoint source were 16 739 t/yr and 14 272 t/yr, accounting for 53.98% and 46.02%, respectively. Point source pollution was stronger than nonpoint source pollution in the study area at present. The water quality of upstream was better than that of downstream of the rivers and cities. It is indispensable to treat industrial wastewater and municipal sewage out of point sources, to adopt the best management practices to control diffuse pollutants from agricultural land and urban surface runoff in improving water quality of the Songhua River Basin. The revised S-P model can be successfully used to identify pollution source and quantify point source and nonpoint source loads by calibrating and validating.  相似文献   

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玄松柏  谈洪波  冯建林  申重阳  李辉 《大地测量与地球动力学》2013,33(5):7-10

???????????????????????????????????????????????????1999-2008????????????仯??????????????????????????????????????????????仯??????????????????????????в??????????????????????????????????????????????????????????  相似文献   

Deriving Changjiang coastal zone wind from C-band SAR and its application to salinity simulation     

王利花  周云轩  朱建荣  沈芳  田波 《中国海洋湖沼学报》2014,32(4):946-957

Wind plays an important role in hydrodynamic processes such as the expansion of Changjiang （Yangtze） River Diluted Water （CDW）, and shelf circulation in the Changjiang estuary. Thus, it is essential to include wind in the numerical simulation of these phenomena. Synthetic aperture radar （SAR） with high resolution and wide spatial coverage is valuable for measuring spatially inhomogeneous ocean surface wind fields. We have collected 87 ERS-2 SAR images with wind-induced streaks that cover the Cbangjiang coastal area, to verify and improve the validity of wind direction retrieval using the 2D fast Fourier transform method. We then used these wind directions as inputs to derive SAR wind speeds using the C-band model. To demonstrate the applicability of the algorithms, we validated the SAR-retrieved wind fields using QuikSCAT measurements and the atmospheric Weather Research Forecasting model. In general, we found good agreement between the datasets, indicating the reliability and applicability of SAR- retrieved algorithms under different atmospheric conditions. We investigated the main error sources of this process, and conducted sensitivity analyses to estimate the wind speed errors caused by the effect of speckle, uncertainties in wind direction, and inaccuracies in the normalized radar cross section. Finally, we used the SAR-retrieved wind fields to simulate the salinity distribution off the Changjiang estuary. The findings of this study will be valuable for wind resource assessment and the development of future numerical ocean models based on SAR images.  相似文献