南沙群岛海区晚第四纪碳酸盐沉积

本文研究了五个柱状沉积物的碳酸盐沉积。根据沉积物的陆源碎屑和生物骨屑ＣａＣＯ３沉积作用的特点，把本区沉积物分为五种沉积类；碳酸盐生物组成的门类较多，以有孔虫为主，其次为珊瑚，腹足类等；碳酸盐矿物以低镁方解石为主，还有高镁方解石和文石；与沉积物中ＣａＣＯ３有关的化学元素１０多种。这些元素和稀土元素的含量，比值等，是区分礁相，礁体过渡带和非礁相的标志。所有这些碳酸盐沉积作用的特点表明，区内存在着五种沉     

渤海南部表层沉积的相特征

通过海上调查及实验室分析,查明渤海南部表层沉积物在结构类型、矿物组合、生物组分及沉积构造等相特征方面具有明显的分区性。渤海南部存在五种沉积相:黄河水下三角洲相、陆架盆地相、海湾相、潮流浅滩相及古滨岸相。黄河水下三角洲相从河口延至水深15—20米处,沉积速率很高,沉积物富含碎屑云母及CaCo_3。陆架盆地相的沉积为粉砂质粘土,具有生物扰动构造。     

LAPP对中国对虾(Penaeus chinensis)生长、缺氧耐受力及免疫抵抗力的影响

实验研究维生素C多聚磷酸酯（LAPP）添加在对虾饲料中，对中国对虾的生长、缺氧耐受力及免疫抵抗力的影响；实验进一步证明了中国对虾饲料中LAPP的最适添加量为400mg／100g饲料;本文还提出饲料中的LAPP能够提高中国对虾的缺氧耐受力，在溶氧超过3．1mg／kg海水的情况下，效果显著，在降低到2．3mg／kg海水时，作用减弱；用副溶血弧菌（Vibroparahaemolyticus）注射入虾体内，12小时内记录发现，饲料中不含LAPP的一组中国对虾，死亡率高于其它组，并且，LAPP含量最高的一组，死亡率明显低，死亡时间也出现较晚，这证明LAPP能够提高中国对虾的免疫抵抗力；本实验用注射金黄色葡萄球菌后细胞的吞噬百分率作指标，研究对虾细胞的吞噬作用，发现饲料中不含LAPP的对虾的吞噬百分率较低，随着饲料中LAPP浓度的提高，对虾血细胞的吞噬百分率逐渐升高，说明中国对虾细胞的吞噬作用逐步增强。     

Random wave-current interactions in water of varying depth

Refraction of incoherent random gravity waves with currents and bottom topography results in spatial variations in the spectral characteristics of the free surface. Prediction of such variations based on the radiation transfer equation is in a simple analytic form for the case of one dimensional inhomogeneities in currents and topography. This analytic form is examined in terms of two-dimensional wave number- and polar frequency-direction spectra along the associated dynamic and kinematic constraints relevant to wave breaking and reflection. Results are specialized to the simplest case of horizontal shear currents in deep and shallow water with explicit examples to illustrate the relative and combined effects of currents and topography on free surface spectra.     

渤海湾盆地沙河街组钙质超微化石古生态及沉积环境

渤海湾盆地沙河街组中钙质超微化石的发现,表明这一时期渤海湾盆地与海水有过联系。对钙质超微化石古生态及沉积环境研究表明,化石主要产出时代为始新世晚期至渐新世早中期,属“间冰期”亚热带气候型。这一问题的深入研究,对于渤海湾盆地的石油勘探有重要意义。     

Vertical Sound Velocity Transition in the Coral Reef Core and Its Significance of Indicating Facies

On the basis of the sound velocity measurements of the coral reef core from Nanyong No.1 well of Yongshu Reef in the Nansha Islands,the paper studies the relations between the vertical sound velocity transition features in the coral reef core and the corresponding stratigraphic depositional facies change as well as stratigraphic gap of erosion,analyses the cause of the sound velocity transition,expounds the concrete process of the sea level change resulting in the stratigraphic gap of erosion and facies change in the coral reef and explains the relations between the vertical sound velocity transition in the coral reef core and the corresponding stratigraphic paleoclimate and the sea level change.This study is of important practical value and theoretical significance to the island and reef engineering construction and the acoustic logging for oil exploration in the reef limestone area as well as the paleoceanographic study of the marginal sea in the westerm Pacific Ocean.     

人工养殖点带石斑鱼弧菌病病原菌的分离及鉴定

广东、海南两省多个海水网箱养殖场养殖的点带石斑鱼(Epinephelus malabaricus)发生严重的弧菌病,从海南三亚和广东深圳的发病鱼病灶上分离到2株致病性细菌VAL02和VAL00,经人工回接感染实验证明这2株菌引起点带石斑鱼弧菌病,VAL02对点带石斑鱼苗的半致死量是2.25×10~5 cfu/g。经形态及生理生化特征分析,鉴定出VAL02及VAL00均为溶藻弧菌。应用药敏纸片法研究了22种化学疗剂对VAL02及溶藻弧菌标准株的生长抑制作用,发现VAL02对氯霉素、氟哌酸、卡那霉素和乙酰螺旋霉素等产生耐药性,对复方新诺明和环丙沙星等敏感。     

青岛地区的台风暴潮与潮灾

本文分析了青岛沿海地区的台风暴潮灾害状况，给出了潮位与海浪的联合作用对灾的影响关系式，提出了今后风暴潮预报的思路。