鮸鱼胚胎发育的研究

研究了人工繁殖时鮸鱼(Miichthys miiuy)胚胎的发育过程。鮸鱼受精卵呈圆球形,浮性,卵径为0.99~1.15 mm,中央大多具有1个油球,少数为2~3个或较多个油球。在水温为24.5~24.7℃,盐度为24的天然海水中,鮸鱼胚胎发育历时约21h 48 min孵化出膜。整个胚胎发育分为5个阶段,共21个发育期。     

动态基准实时测量系统的开发与应用

介绍了动态基准实时测量系统的硬件组成、站点上全站仪棱镜组合安装与检测方法、系统软件的开发及特点，最后对系统在广州地铁某地铁站结构变形自动监测中的应用情况进行了阐述。通过实际应用表明该系统能应用在自动化、高精度的变形监测领域。     

地层学的发展推动油气地质理论研究的进步

自上个世纪50年代以来,地层学经历了彻底的变革,逐渐由“相模式”、“沉积体系”、“地震地层学”发展到目前的“层序地层学”,形成高分辨率层序地层学和事件地层学的理论体系和研究方法。文章围绕层序地层学、高分辨率层序地层学基本方法及理论体系,与含油气系统相关关系进行了讨论。     

The effects of immobilization on physiology and ultrastructure of unicellular alga Platymonas subcordiformis

ＴｈｅｅｆｆｅｃｔｓｏｆｉｍｍｏｂｉｌｉｚａｔｉｏｎｏｎｐｈｙｓｉｏｌｏｇｙａｎｄｕｌｔｒａｓｔｒｕｃｔｕｒｅｏｆｕｎｉｃｅｌｌｕｌａｒａｌｇａＰｌａｔｙｍｏｎａｓｓｕｂｃｏｒｄｉｆｏｒｍｉｓ￥ＺｈａｎｇＸｕｅｃｈｅｎｇ；ＷｕＸｉａｏｎａｎａｎｄＬｉ...     

大气污染物质SO2对雾水酸度的控制作用

主要研究了青岛大气污染物质ＳＯ２对雾水酸度的控制作用，用实测结果统计得到雾得水ＰＨ值与Ｃｓｏ２的经验关系式，青岛、烟台等地雾水ｐＨ值与计算值吻合一致，表明统计关系的合理性。通过对青岛雾水中ＳＯ２清除率的估算，说明在青岛雾期，人为污染物质所占比值越高，其污染物质沉降百分率也越高，存留在大气雾中百分率就愈低。     

Observations of the countercurrent on the inshore side of the Kuroshio northeast of Taiwan

Intensive current measurements in the area northeast of Taiwan indicate subsurface, southwestward flow existed between the inshore edge of the Kuroshio and the East China Sea continental slope. At 70 km away from Taiwan, this countercurrent has a mean speed about 30 cm s^–1 at mid-depth. Closer to Taiwan, the flow turns along with the topography, and subjects to sidewall and bottom friction. Both the magnitude and the vertical shear of this countercurrent are comparable with that inferred from hydrographic survey. The wind field features short-period (a few days) fluctuations associated with the cold front passages, however, this is not reflected on the current records. It appears that the countercurrent is fairly steady. Together with similar reversing flow found at places much further to the north, the overall pattern seems to be a general quasi-steady feature along most part of the shelf edge of the East China Sea.     

风力对内陆浅水水域磷水平的影响

本文通过对平度市大泽山水库(面积约0.5平方公里,平均水深约1.5米)的实地观测,研究了风力对内陆浅水水域磷水平的影响。结果表明,影响程度取决于风速、风力作用时间、水深以及风力作用前磷水平的高低等因素。就大泽山水库而言,风速大于2.5米/秒的风力可引起各种形态磷的明显增加。不过对磷酸盐磷来说,如果浓度本来就较高,风力作用下当有大量沉积物颗粒泛起时,会对PO_4~≡产生吸附,因而可能导致水中游离磷酸盐磷含量下降。鉴于此,作者建议对内陆浅水水域进行磷水平调查时应考虑风力的作用。     

一个简单食物链的能流实验

食物链能量转换是生态系统的主要功能之一。海洋生物生产就是海洋食物链能量流动的一种表现形式。它把来自以藻类为主的植物性生产，通过被食－取食多级转换，形成了贝、虾、鱼等各级动物性生产，这就为人类提供了丰富的渔业资源。海岸带水域是我国目前海洋开发的主攻目标，揭示这个海区中食物链能流转移过程，对其经济生物生产力估算和开发前景预测有着重要意义。测定自然条件下海洋食物链能流是极其困难的。借助实验结果进而推算，就比较方便。本研究选择我国海岸带水域中属于不同营养级的４个经济种，构成一个简单的人工食物链，即金藻（…     

4种重金属离子对海洋三角褐指藻生长影响的研究

于１９９３年４月－１９９３年５月以Ｚｎ＾２＋，Ｃｄ＾２＋，Ｐｂ＾２＋，Ｃｕ＾２＋不同浓度的海水对三角褐指藻进行生长影响的研究。实验表明，Ｃｕ＾２＋对三角褐指藻生长的毒性最大，其９６ｈＥＣ５０为０．０１７ｍｇ／Ｌ。Ｐｂ＾２＋的毒性最小，其９６ｈＥＣ５０为０．４６８ｍｇ／Ｌ。４种重金属离子的毒性顺序是Ｃｕ＾２＋＞Ｃｄ＾２＋＞Ｚｎ＾２＋＞Ｐｂ＾２＋，除Ｃｄ＾２＋外，其他３种金属离子对该单细胞藻的生长安全     

Study on genetic diversity of cultivated populations in 4 species of shrimps

Genetic diversity of cultivated populations was investigated using assay of vertical slabpolyacrylamide gel electrophoresis in 4 species of shrimps, which were Penaeus japonicus, Penaeus monodon , Penaeus vannamei and Metapenaeus ensis, The results showed that the mean number of alle-les per locus (A) is 1.3±0.2, 1.3±0.1, 1.3±0.1 and 1.3 ±0.1 respectively; the percentage of polymorphic loci (P0.95) is 12.5, 6.7, 20 and 23.5 respectively; the expected heterozygosity (He) is 0.042±0.034,0.042±0.031, 0.094±0.042 and 0.097±0.047 respectively; and the observed heterozygosity (H0)is 0.029±0.024, 0.028±0.023,0.154±0.082 and 0.150±0.084 respectively. The difference of genetic diversity is obvious in 4 species of shrimps. The degree of genetic diversity is M. ensis > P. vannamei > P. japonicus > P. monodon. In short, the lower level of genetic diversity is estimated in 4 species of shrimps.