桡足类

The antiparasitic effect of caprylic acid against several fish parasites, i.e., the ciliate Cryptocaryon irritans, monogenean Benedenia seriolae, copepod Pseudocaligus fugu and myxosporean Kudoa shiomitsui, was examined by in vitro trials.Caprylic acid at a concentration of 1 mM had a parasiticidal effect against C. irritans theronts, B. seriolae oncomiracidia and K. shiomitsui spores and a contractile effect against B. seriolae adults, but had no clear effect against P. fugu copepodids and adults.

在体外实验中研究了辛酸对多种鱼类寄生虫的抗虫效果，如纤毛虫刺激隐核虫、单殖吸虫鰤贝尼登虫、桡足类Pseudocaligus fugu和微孢子虫库道虫。1mM的辛酸对刺激隐核虫滋养体、鰤贝尼登虫纤毛幼虫和库道虫孢子具有杀虫效果，对鰤贝尼登虫成虫有收缩效果，但对Pseudocaligus fugu的桡足幼体和成虫无明显效果。

The antiparasitic effect of caprylic acid against seeral fish parasites, i.e., the ciliate Cryptocaryon irritans, monogenean Benedenia seriolae, copepod Pseudocaligus fugu and myxosporean Kudoa shiomitsui, was examined by in itro trials.Caprylic acid at a concentration of 1 mM had a parasiticidal effect against C. irritans theronts, B. seriolae oncomiracidia and K. shiomitsui spores and a contractile effect against B. seriolae adults, but had no clear effect against P. fugu copepodids and adults.

在体外实验中研究了辛酸对多种鱼类寄生虫的抗虫效果，如纤毛虫刺激隐核虫、单殖吸虫鰤贝尼登虫、桡足类Pseudocaligus fugu和微孢子虫库道虫。1mM的辛酸对刺激隐核虫滋养体、鰤贝尼登虫纤毛幼虫和库道虫孢子具有杀虫效果，对鰤贝尼登虫成虫有收缩效果，但对Pseudocaligus fugu的桡足幼体和成虫无明显效果。

Euphausiids supplied most of the food intake for the pelagic fish communities, followed by copepods, amphipods and sagitta, while the most important food resources for the demersal fishes were shrimps and fishes as well as euphausiids.

磷虾类是中上层鱼类最主要的食物来源，其次是桡足类、端足类和毛颚类；虾类和鱼类是底层鱼类最主要的食物来源，其次是磷虾类。

The benthic meiofauna was quantitatively investigated from 19 stations in the sea areas of the First-phase Project of Yangshan Deepwater Port in November, 2005 and ten meiofauna groups, including nematodan, copepodan, polychaetan, bivalvian, ostracodan, amphipodan, tanaidacean,cumacean, gastropodan and foraminiferan, were recorded.

2005年11月对洋山深水港一期工程海域19个站位的小型底栖动物进行了调查，共获得10个主要类群，包括线虫、桡足类、多毛类、双壳类、介形类、端足类、异足类、涟虫、腹足类和有孔虫。

In addition,20 samples of copepoda resting eggs were separated from the pond mud in Decemeber,2003,and 5 samples of nauplins hatched from that kind of resting eggs were detected.

在20例桡足类休眠卵样品中有1例为阳性，阳性率为5%；并且实验室中孵化此种休眠卵得来的桡足类幼体样品中检测到阳性，阳性率为40%。

It showed adult copepoda could carry active WSSV particle and led to shrimp infection potentially.

另外从带毒桡足类所产的休眠卵及其孵化的幼体中也检测到WSSV阳性，显示桡足类休眠卵极可能是传播WSSV的载体和途径。

From the experiments, we might conclude that adult copepoda could carry WSSV and then infected shrimp through feeding, and that the resting eggs might be a kind of potential transmission medium to lead to WSSV transmit in different generations.

桡足类休眠卵很可能是一种潜在的导致WSSV在世代间进行传播的媒介，携带WSSV的桡足类可造成对虾感染。

In addition, a kind of copepoda was experimentally cultured, which from the resting eggs separated from the pond mud, then the cultural conditions and biological characters were partly mastered.

分离池塘底泥中桡足类的休眠卵，进行孵化并培养，初步掌握了其中一种桡足类(克氏纺锤水蚤Acartia clausi)的培养条件和部分生物学特性，并进行了纯化培养，为进一步研究病毒传播途径提供充足的实验材料。

Results showed that 57 species in total were identified. Among them copepod was the dominant group, containning 20 taxa. The zooplankton community was composed of 18 rotatoria species, 8 cladocera species, 2 tunicata species, and 1 species in each of Protozan, polychaeta, heteropoda, medusae and euphausiacea, and 2 species unidentified.

经鉴定有浮游动物57种，其中桡足类占优势，有20种；其次为轮虫和枝角类，分别为18和8种；此外，被囊动物2种，原生动物、多毛类、异足类、水母类、糠虾类各1种；还有阶段性各种幼虫以及未知种类2种。

Selective predation of predatory fish can largely reduce the abundance of adult copepods, but doesn't have much influence on species richness of copepods.

水库捕食性鱼类对甲壳浮游动物的选择性捕食，对桡足类种类影响较小，对桡足类成体密度影响较大。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。