幼体

The result shows: The nauplius eye appears at the nauplius in membrane stage.

结果表明，幼虫眼在膜内无节幼体期已具备。

Increased number of both total and granular haemocytes at nauplius I stage impressed a possible enhancement of the immune system as the embryogenesis progressed.Ⅱ.

在无节幼体Ⅰ期样品中，血细胞总数和大颗粒细胞数量较胚胎期都显著增加，反映了对虾免疫系统随着胚胎发育的进行而加强。

PHMG content within the range of 125 mg/L did not influence the oospore hatchability of Penaeus japonicus and the content within 0.5 mg/L had no significant influence on metamorphosis rate of nauplius larva.

聚六亚甲基胍含量在125 mg/L范围内对日本对虾受精卵孵化率无影响，含量0.5 mg/L以内对无节幼体变态率无明显影响。

Nutrient-enriched reservoirs support greater abundance and biomass of copepods. However, dominance of Calanoids was lower while dominance of cyclopoids, copepodids and nauplius were much higher in the nutrient-enriched reservoirs.

随着水库营养水平的升高，桡足类密度和生物量也相应增加，但是大型哲水蚤的优势度降低，而剑水蚤和桡足类幼体的优势度上升。

Fc-vasa mRNAs were detected by RT-PCR in early developmental stages from 2-cells embry to intramembranous nauplius, and not in any stages after nauplius. Based on above results, it is postulated that Fc-vasa is required for germ cell determination and formation of F. chinensis as a maternal component.

但表达量逐渐降低，自出膜后的无节幼体开始检测不到表达信号，根据以上结果推测，Fc-vasa mRNA可能作为母源生殖质成分参与中国明对虾生殖细胞的决定和形成。

During the breeding process of Penacus vannamei,the PCR and RT-PCR techniques are applied to detect three types of virus,that is,WSSV,IHHNV,TSV,to protect the parental shrimp,egg,nauplius,parental shrimp feed,artemia and water from being infected.The purpose of this work is to breed the healthy Penacus vannamei,and to offer a feasible measure to keep a sustainable development for Penacus vannamei breeding.

应用PCR和RT-PCR技术对WSSV、IHHNV和TSV这3种对虾病毒在凡纳滨对虾育苗过程中各个环节进行了检测，防止亲虾、卵、无节幼体、仔虾、亲虾饵料、丰年虫、水体等诸环节受到以上3种病毒携带或感染，保证培育出的凡纳滨对虾仔虾是高健康的虾苗，为凡纳滨对虾健康养殖的可持续发展提供一条可行的途径。

Biological Activated Carbon Filter could provide ideal habitats for invertebrates, but invertebrates may lead to aesthetic problems and adverse health effects of drinking water. This paper studied the invertebrates in biological activated carbon filters in a water plant of the south of China during Sep. 2006 to Sep. 2007. The results implied that BAC filters were colonized by invertebrates, in which 23 species of invertebrates were found, the dominating organism group was the rotifer, and others included Copepoda, Cladocera, Oligochaeta, Nauplii and Nematoda.

生物活性炭(Biological activated carbon， BAC)滤池能够为无脊椎动物提供理想的生境，但无脊椎动物可能给饮用水带来负面的健康效果和感观问题。2006年9月～2007年9月，对南方某水厂BAC滤池无脊椎动物滋生状况进行了为期13个月的调查研究，共发现无脊椎动物23种，优势类群为轮虫，其他类群还有桡足类、枝角类、寡毛类、无节幼体、线虫等。

A total of 20 groups of meiofauna in the Southern Yellow Sea: Nematoda, Copepoda, Polychaeta, Kinorhyncha, Bivalvia, Ostracoda, Amphipoda, Tanaidacea, Isopoda, Cumacea, Gastropoda, Gastrotricha, Halacaroidea, nectochaeta, Amphiura, Nemertina, Insecta, Priapulida, Turbellaria and others were identified.

共鉴定出自由生活线虫、底栖桡足类、多毛类、动吻类、双壳类、介形类、端足类、异足类、等足类、涟虫类、腹足类、腹毛类、海螨类、疣足幼体、蛇尾类、纽虫类、昆虫类、曳鳃动物、涡虫类和其它类等20个小型底栖动物类群，小型底栖动物的平均丰度为(1186.12±486.07)ind.10cm~(-2)，其中海洋线虫占绝对优势，其平均丰度为(1063.97±469.98)ind.10cm~(-2)，占小型动物总丰度的89.702%；其次是底栖桡足类，占4.193%。

The larva-specific expression level of the function correlated to celluar components was the highest.The highest specific expression level of molecular function was appeared at neurula stage.A lot of functional specific expression about biological process was also appeared at neurula stage.7.The result showed that the pearson correlation coefficient was 0.896 compared between the sea urchin and Ciona savignyi.

进一步分析发现：在与细胞组件相关的功能特异性表达方面，幼体期的特异性表达量最高；在与分子功能活性相关的功能特异性表达中，神经胚时期的特异性表达量最高；而参与生物过程的功能特异性表达方面，神经胚时期的特异性表达量则最高。7不同物种间转录组分析显示尾索动物海鞘的转录组与棘皮动物海胆的最接近，其相关系数为0.896，而海胆与文昌鱼的相关系数只有0.682，结果表明在进化上文昌鱼可能与脊椎动物更接近。8运用Apache、php、MySQL技术搭建了Widows平台的文昌鱼EST分析数据库。

We hope that the results could offer reasons for studies of biology of development, genetics and physiology of nutrition in the ontogenetic periods of Coelomactra antiquata and for breeding parents with highquality, regulation of procreation and prevention of damage by disease in "863"project:《Cosmically cultivation of Coelomactra antiquata》.The results showed as below: Distribution and activities of different isozymes in different tissues were differential and relative to their functions.

通过本文的研究，希望可以为更加深入地进行西施舌的发育生物学、遗传学以及幼体发育变态过程中的营养生理学研究提供有价值的参数，同时也为国家"863"计划《西施舌的大规模人工育苗》中优质亲贝培育、生殖调控技术及病害预防等问题提供一定的理论依据。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。