桡足类

In all zooplanktons, the site-occurrence-rates of Copepoda and Chaetognatha were the highest, 100% and 93.3%, and the average biomass of which were 298.56 mg·m-3 and 118.09 mg·m-3 and the summation accounted for 96.88% of total biomass. The result shows that these two species created a strong relationship with the distribution of saury fishing grounds, and their biomass can be considered as the important indicator of looking for the main saury fishing grounds.

在浮游动物中，桡足类和箭虫类占绝对优势，出现频率分别达到100%和93.3%，平均每立方米生物量为298.56 mg和118.09 mg，其和占总生物量的高达96.88%，严重影响了总生物量的空间分布，分析认为与中心渔场分布的关系最为显著，因此可将其生物量大小作为确定秋刀鱼中心渔场的重要指标。

However, the food composition of the M. albus with body length more than 100mm were quite consistent, with Chironomidae, Oligochaeta, Pheretima, Cladocera, Copepoda and insect larvae as the major food items.

而全长101-200mm的幼鳝及全长大于200mm的成鳝的食性，随全长变化相对稳定，且幼鳝和成鳝的食谱基本相同，其主要食物组成均包括摇蚊幼虫、水生寡毛、蚯蚓、昆虫幼虫、枝角类和桡足类等。

Only 8 species of Cladocera and 5 species of Copepoda were observed.

共鉴定浮游动物134属217种，其中原生动物95属153种，占浮游动物物种数的71%；轮虫27属51种，占23%；枝角类7属8种，占4%；桡足类5属5种，占2%。

During one year study,32 species（22 Cladocera and 10 Copepoda）were found.

全年中，共发现浮游甲壳动物32种，其中枝角类22种，桡足类10种。

During one year study,32 species22 Cladocera and 10 Copepodawere found.

全年中，共发现浮游甲壳动物32种，其中枝角类22种，桡足类10种。

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。

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%。

The biomass of zooplankton changed relatively intensely, especially Cladocera、Copepoda and Young animal, and the biomass of the zooplankton will gradually increase.

随着泥沙的逐渐沉降，浮游动物生物量变化相对激烈，尤其是枝角类、桡足类和无节幼体，水中浮游动物生物量将逐渐增加。

The mean density and biomass of cladocera are 0.070 ind/L and 0.002 mg/L. The mean density and biomass of copepoda are 5.155 ind/L and 0.021 mg/L. 5. Attached algae were classified into 3 Phylum 16 Genus 27 Species.

枝角类的平均密度为0.070 ind／L，平均生物量为0.002 mg／L；桡足类的平均密度为5.155 ind／L，平均生物量为0.021mg／L。

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。