浮游动物

Besides Copepoda, Medusae, Cladocera, Mysidacea also played an important role in maintaining the structure and function of estuarine ecosystem.

除桡足类之外，水母类、枝角类、糠虾类等其它浮游动物在维持河口生态系统结构与功能上也具有重要作用。

It can be seen that the species composition of zooplankton comprised mainly of protozoa,followed by rotifers,copepods and cladocera,with an average density of 3.98×10~3ind/L.

从中可看出浮游动物种类组成以原生动物为主，其次是轮虫，桡足类和枝角类最少，平均密度为3.98×10~3ind/L。

Species of zooplankton were identified in Qiaodun Lake, with 45 being protozoa, 37 rotatoria, 19 cladocera, 6 copepoda.

上述湖泊浮游动物无论是种类组成还是密度均以小型的原生动物和轮虫占绝对优势。

60 Species of zooplankton were identified, among which there were Rotifera 34 species, Copepoda 13 species, Cladocera 6 species, among which Rotifera has an dominance for 55.02%, especially Brachionus sp.

浮游动物共鉴定到60种，其中轮虫有34种，桡足类13种，枝角类有6种。

Both of amount of 54 ind/L and 95 ind/L were found from cladocera of 8 species as well as Copepoda of 6 species and their proportion of 28.57% and 21.43% were recorded.

浮游动物28个种属，其中轮虫14个种属，数量137 ind/L，占50%；枝角类8个种属，数量54 ind/L，占28.57%；桡足类6个种属，数量95 ind/L，占21.43%。

Temporal changes in zooplankton composition occurred in both ponds with Cladocera appearing in abundance later, in the fourth week, whereas copepods and rotifers were well represented since the beginning.

浮游动物组成短暂的变化在两个塘同时出现随着枝角类较晚出现一定丰度，在第四周左右，然而桡足类和轮虫自开始就出现。

Thrissakarnrnalensis was the basal pelagic phytoplankton feeder,while Trachurus japouicu was commonly feed in seagrass circumstance.GC/C-IRMS analysis was applied to fish,zooplankton and demersal species.

建立GC/C-IRMS技术测定生物体单分子脂肪酸碳稳定同位素的方法，应用于长江口毗邻海域主要生物种类带鱼、小黄鱼、黄鲫等海洋鱼类，桡足类、箭虫、水母等浮游动物，中国毛虾、周氏新对虾、中华管鞭虾等底栖生物的研究。

Adult Cyclops, with body length of one to several millimeters, may be caught by naked eye to bring consumers unsanitary sense and may become disease transmission medium as the host of pathogenic parasite, like schistosome and eelworm, to threaten human health. So Cyclops needed be effectively removed to ensure drinking water security.

剑水蚤类浮游动物在用户水中出现，不仅违反了生活饮用水卫生标准中对感官性状指标的规定，给用户带来了不良的感官影响（剑水蚤体长可达1～几个mm，肉眼可见），容易引起用户对水质信心的下降与恐慌，更为重要的是大多数剑水蚤是诸如血吸虫、线虫等水中致病生物的中间宿主，从而成为传播疾病的一个重要媒介，给人们的用水安全问题带来了很大的威胁。

Tiarina fusus increased only when Stenosemella nivalis decrease, which indicates there are some kind of competition mechanism between them.

富磷更有利于大个体浮游动物的生长和竞争优势。并额蟹和细壳虫之间存在某种竞争抑制，并额蟹在细壳虫密度较低时才会快速成长。

According to the enrichment abilities of the investigated organisms, zooplankton, Crassostrea gigas, Perna viridis, Potamocorbula rubromuscula, Nassarius siquinjorensis and Ulva lactuca were found to be suitable as bio-indictors for some trace metals.

根据对生物富集金属元素能力的分析，浮游动物、太平洋牡蛎、翡翠贻贝、红肉蓝蛤、西格织纹螺和石莼均是某些金属元素的理想监测生物。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。