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On an average, 1.1±0.3 and 0.4±0.1 rotifers were hatched from per milliliter sediments of the big and the small basins, respectively. The rotifer species, which was hatched at one incubation pattern from the resting eggs in sediments of both the two basins of the lake and whose density was higher than 20ind/200mL, included Proalides tentaculates , Anuraeopsis fissa , Keratella cochlearis , Brachionus diversicornis , Filinia brachiata and B .
mL的轮虫种类总计有6种,它们是多须伪前翼轮虫、裂痕龟纹轮虫、螺形龟甲轮虫、裂足臂尾轮虫、臂三肢轮虫和萼花臂尾轮虫;其中前三种轮虫为两湖区所共有。
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The body volumes of the four common Brachionus species excluding B. forficula were significantly correlated to water temperature, and their mean body size was positively correlated with their mean egg volume.
除剪形臂尾轮虫外,其它3种臂尾轮虫的个体体积均与水温间具有显著的相关性,平均卵体积均与各自的平均被甲长度呈显著的正相关关系。
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The smallest dominant species were the Rotifera Brachionus forficula, Brachionus angularis and Polyarthra vulgaris, with an average length less than 100μm.
轮虫优势种中,体长最小的是剪形臂尾轮虫、角突臂尾轮虫和广布多肢轮虫等,它们的平均体长均小于100μm。
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Seven Brachionus species in Lake Jinghu were found, of which Brachionus calycflorus, B. angularis, B.diversicornis and B.forficula were determined as common species due to their higher population densities and occurrence frequency. The population density of both B.calyciflorus and B. angularis reached the peak in February and March and decreased rapidly after April, while that of both B. diversicornis and B. forficula remained high during June-September and decreased sharply after October.
结果表明,镜湖常见的7种臂尾轮虫中,仅萼花臂尾轮虫、角突臂尾轮虫(B.angularis)、裂足臂尾轮虫(B.diversicornis)和剪形臂尾轮虫(B.forficula)的种群密度和出现频率较高;前两者种群密度高峰期均出现在2~3月份,4月份后均较低;后两者种群密度在6~9月份较高,而在10月份后很快下降。
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There were also some larva of copepod and macrura in different developmental stages. Brachionus calyciflorus, B.falcatus and Bosmina longirostris appeared in each station.
调查期间各站位均出现的种类有萼花臂尾轮虫、镰状臂尾轮虫( B.falcatus )和长额象鼻溞。
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Calyciflorus clones were cultured at 15℃, 20℃, 25℃and 30℃with 3.0×106 cells/mL of Scenedesmus obliquus to investigate their differences in life history characteristics and their responses to increasing temperature.
结果表明,温度对萼花臂尾轮虫存活率和繁殖率的影响在不同克隆间存在着差异。20℃和25℃下,四个克隆轮虫的世代时间和净生殖率均分别无显著的差异;20℃、25℃和30℃下,四个克隆轮虫的平均寿命和出生时的生命期望亦然。
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Urceolaris and Daphnia pulex were studied under the conditions of laboratory. The toxicity research of trichlorphon showed the median lethal concentration(LC50) of three kind of zooplankton in 24h were 318.5mg/L,315.9mg/L, 3.6μg/L respectively.
研究结果表明:在敌百虫的毒性研究中,萼花臂尾轮虫、壶状臂尾轮虫和蚤状溞的24h的LC50分别为318.5mg/L,315.9mg/L和3.6μg/L。
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It was found there were 11 species of Rotifera in this area.
臂尾轮科种类最多,占63.6%,萼花臂尾轮虫B。
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In addition there are several dominant classes, including Filinia longiseta. Trichocerca、Polyarthra trigla、Brachionus angularis and Brachionus calycflorus, which contained 91.8% of total zooplankton.
另外,萼花臂尾轮虫、长三肢轮虫、角突臂尾轮虫、针簇多肢轮虫、异尾轮虫均为优势种,合计占浮游动物总数的91.8%。
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However, the growth of rotifer fed on high-density Chlorella pyrenoidosa was inhibited notably, and there was no effect on its fecundity. Sexual reproduction of Brachionus urceus was not promoted by improving the density of diet.
结论]低食物浓度下,轮虫生命周期缩短、繁殖力降低;食物浓度过高,能抑制轮虫生长,但对繁殖力影响不大;提高食物浓度,对壶状臂尾轮虫的有性生殖没有明显的促进作用。
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telotrochal larva:尾轮幼虫
围肛纤毛轮 Telotroch,Peri-anal circlet,Peri-anal ciliary ring | 尾轮幼虫 telotrochal larva | 尾丝 Terminal filament
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telotrochal larva:尾轮蚴
围肛纤毛轮 telotroch; peri-anal circlet; peri-anal ciliary ring | 尾轮蚴 telotrochal larva | 端营养室型 telotrophic type
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Brachionus forficula:剪形臂尾轮虫
并用轮虫污染指示种类和生物多样性指数评价人工河水质污染及水质营养状况.在两个夏季调查中,共发现轮虫35种,其中污染指示轮虫18种.根据平均密度,优势种分别为剪形臂尾轮虫(Brachionus forficula)、针簇多肢轮虫(Polyarthra trigla)和奇异巨腕轮虫(Pedalia mira),
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Brachionus urceus:壶状臂尾轮虫
[关键词]壶状臂尾轮虫(Brachionus urceus) 休眠卵 形态[关键词]壶状臂尾轮虫(Brachionus urceus) 急性毒性试验 重金属毒性 半致死浓度[摘要]研究了铜、锌、镉、铅离子及其混合液对壶状臂尾轮虫(Brachionus urceus)的急性毒性影响,实验结果表明,
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Rear wheel locking lever:尾轮限位控制杆
20. Engine mixture 燃气混合比控制器 | 21. Rear wheel locking lever: 尾轮限位控制杆 | 22. Rudder trim wheel 方向舵配平轮
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rear furrow wheel scraper:尾轮刮土板
rear furrow wheel adjustment screw ==> 尾轮调节螺钉 | rear furrow wheel scraper ==> 尾轮刮土板 | rear fuselage fairing ==> 机尾整流罩
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Lock Tail Wheel:尾轮锁开关
Wheel Brakes B 机轮刹车 | Lock Tail Wheel 尾轮锁开关 | Toggle Gun Pods On/Off 机炮吊舱 开/关
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tail wheel:尾轮
"键)飞机尾轮(Tail Wheel),放开轮闸. 要想安全迅速的飞上天空,必须找到合适的跑道,当找到合适的跑到时,再次锁定尾轮,然后平稳的使用油门增加动力(再次推荐使用使用最高转速(RPM)值). 准备好使用方向舵或轮闸来控制方向和平衡发动机和螺旋桨的扭力.
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retractable tail wheel:收放式尾轮
retractable launcher 伸缩式发射器 | retractable tail wheel 收放式尾轮 | retractable tail wheel 收放式尾轮
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swivel tail wheel:旋动式尾轮
swivel plow 双向犁 | swivel tail wheel 旋动式尾轮 | swivel tail wheel 旋动尾轮